| Line |
Label |
Object Class |
Period Type |
Balance |
Report ElementName |
| 1 |
0001000 - Document - Document and Entity Information Document |
Network |
* |
* |
http://corporate.arcelormittal.com/role/DocumentAndEntityInformationDocument |
| 2 |
Implied Table |
Table |
* |
* |
implied:Table |
| 3 |
Document and Entity Information [Abstract] |
Abstract |
|
|
mt:DocumentandEntityInformationAbstract |
| 4 |
Document Type |
Concept (Submission Type) |
For Period |
|
dei:DocumentType |
| 5 |
Entity Registrant Name |
Concept (Text/String) |
For Period |
|
dei:EntityRegistrantName |
| 6 |
Entity Central Index Key |
Concept (CIK Number) |
For Period |
|
dei:EntityCentralIndexKey |
| 7 |
Current Fiscal Year End Date |
Concept (Month/Day) |
For Period |
|
dei:CurrentFiscalYearEndDate |
| 8 |
Entity Filer Category |
Concept (Filer Category) |
For Period |
|
dei:EntityFilerCategory |
| 9 |
Document Period End Date |
Concept (Date) |
For Period |
|
dei:DocumentPeriodEndDate |
| 10 |
Document Fiscal Year Focus |
Concept (Year) |
For Period |
|
dei:DocumentFiscalYearFocus |
| 11 |
Document Fiscal Period Focus |
Concept (Fiscal Period) |
For Period |
|
dei:DocumentFiscalPeriodFocus |
| 12 |
Amendment Flag |
Concept (Yes/No) |
For Period |
|
dei:AmendmentFlag |
| 13 |
Entity Common Stock, Shares Outstanding |
Concept (Shares) |
As Of |
|
dei:EntityCommonStockSharesOutstanding |
| 14 |
Entity Well-known Seasoned Issuer |
Concept (Yes/No) |
For Period |
|
dei:EntityWellKnownSeasonedIssuer |
| 15 |
Entity Current Reporting Status |
Concept (Yes/No) |
For Period |
|
dei:EntityCurrentReportingStatus |
| 16 |
Entity Shell Company |
Concept (Yes/No) |
For Period |
|
dei:EntityShellCompany |
| 17 |
Entity Emerging Growth Company |
Concept (Yes/No) |
For Period |
|
dei:EntityEmergingGrowthCompany |
| 18 |
1001000 - Statement - Consolidated Statements of Operations |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ConsolidatedStatementsOfOperations |
| 19 |
Implied Table |
Table |
* |
* |
implied:Table |
| 20 |
Profit or loss [abstract] |
Abstract |
|
|
ifrs-full:IncomeStatementAbstract |
| 21 |
Sales |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromContractsWithCustomers |
| 22 |
Cost of sales |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CostOfSales |
| 23 |
Gross margin |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GrossProfit |
| 24 |
Selling, general and administrative expenses |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:SellingGeneralAndAdministrativeExpense |
| 25 |
Operating income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossFromOperatingActivities |
| 26 |
Income from investments in associates, joint ventures and other investments |
Concept (Monetary) |
For Period |
Credit |
mt:IncomeLossOfAssociatesJointVenturesAndOtherInvestments |
| 27 |
Financing costs - net |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:FinanceIncomeCost |
| 28 |
Income before taxes |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossBeforeTax |
| 29 |
Income tax (benefit) / expense |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncomeTaxExpenseContinuingOperations |
| 30 |
Net income (including non-controlling interests) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLoss |
| 31 |
Net income attributable to equity holders of the parent |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossAttributableToOwnersOfParent |
| 32 |
Net income / (loss) attributable to non-controlling interests |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossAttributableToNoncontrollingInterests |
| 33 |
Earnings per common share (in U.S. dollars) |
Abstract |
|
|
ifrs-full:BasicAndDilutedEarningsPerShareAbstract |
| 34 |
Basic (USD per share) |
Concept (Share) |
For Period |
|
ifrs-full:BasicEarningsLossPerShare |
| 35 |
Diluted (USD per share) |
Concept (Share) |
For Period |
|
ifrs-full:DilutedEarningsLossPerShare |
| 36 |
Weighted average common shares outstanding (in millions) |
Abstract |
|
|
ifrs-full:WeightedAverageSharesAndAdjustedWeightedAverageSharesAbstract |
| 37 |
Basic (in shares) |
Concept (Shares) |
For Period |
|
ifrs-full:WeightedAverageShares |
| 38 |
Diluted (in shares) |
Concept (Shares) |
For Period |
|
ifrs-full:AdjustedWeightedAverageShares |
| 39 |
1001001 - Statement - Consolidated Statements of Operations (Parenthetical) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ConsolidatedStatementsOfOperationsParenthetical |
| 40 |
Implied Table |
Table |
* |
* |
implied:Table |
| 41 |
Profit or loss [abstract] |
Abstract |
|
|
ifrs-full:IncomeStatementAbstract |
| 42 |
Sales to related parties |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromSaleOfGoodsRelatedPartyTransactions |
| 43 |
Purchases from related parties |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:PurchasesOfGoodsRelatedPartyTransactions |
| 44 |
Reverse stock split ratio |
Concept (Pure) |
For Period |
|
mt:StockholdersEquityNoteStockSplitConversionRatio1 |
| 45 |
1002000 - Statement - Consolidated Statements of Other Comprehensive Income Consolidated Statements of Other Comprehensive Income |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ConsolidatedStatementsOfOtherComprehensiveIncomeConsolidatedStatementsOfOtherComprehensiveIncome |
| 46 |
Implied Table |
Table |
* |
* |
implied:Table |
| 47 |
Statement of comprehensive income [abstract] |
Abstract |
|
|
ifrs-full:StatementOfComprehensiveIncomeAbstract |
| 48 |
Net income (including non-controlling interests) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLoss |
| 49 |
Items that can be recycled to the consolidated statements of operations |
Abstract |
|
|
ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossBeforeTaxAbstract |
| 50 |
Available-for-sale-investments: |
Abstract |
|
|
ifrs-full:AvailableforsaleFinancialAssetsAbstract |
| 51 |
Gain arising during the period |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnRemeasuringAvailableforsaleFinancialAssetsBeforeTax |
| 52 |
Reclassification adjustments for loss (gain) included in the consolidated statements of operations |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ReclassificationAdjustmentsOnAvailableforsaleFinancialAssetsBeforeTax |
| 53 |
Available-for-sale-investments |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherComprehensiveIncomeBeforeTaxAvailableforsaleFinancialAssets |
| 54 |
Derivative financial instruments: |
Abstract |
|
|
mt:DerivativeFinancialInstrumentsAbstract |
| 55 |
Gain (loss) arising during the period |
Concept (Monetary) |
For Period |
Credit |
mt:GainLossesOnDerivativeFinancialInstrumentsBeforeTax |
| 56 |
Reclassification adjustments for loss (gain) included in the consolidated statements of operations |
Concept (Monetary) |
For Period |
Debit |
mt:ReclassificationAdjustmentsOnDerivativeFinancialInstrumentsBeforeTax |
| 57 |
Derivative financial instruments |
Concept (Monetary) |
For Period |
Credit |
mt:OtherComprehensiveIncomeBeforeTaxDerivativeFinancialInstruments |
| 58 |
Exchange differences arising on translation of foreign operations: |
Abstract |
|
|
ifrs-full:ExchangeDifferencesOnTranslationAbstract |
| 59 |
(Loss) gain arising during the period |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationBeforeTax |
| 60 |
Reclassification adjustments for gain included in the consolidated statements of operations |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ReclassificationAdjustmentsOnExchangeDifferencesOnTranslationBeforeTax |
| 61 |
Exchange differences arising on translation of foreign operations |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation |
| 62 |
Share of other comprehensive income (loss) related to associates and joint ventures |
Abstract |
|
|
ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodBeforeTaxAbstract |
| 63 |
(Loss) gain arising during the period |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodBeforeTax |
| 64 |
Reclassification adjustments for (gain) loss included in the consolidated statements of operations |
Concept (Monetary) |
For Period |
Debit |
mt:ReclassificationAdjustmentsOnShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod |
| 65 |
Share of other comprehensive income (loss) related to associates and joint ventures |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossBeforeTax |
| 66 |
Income tax benefit (expense) related to components of other comprehensive income (loss) that can be recycled to the consolidated statements of operations |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss |
| 67 |
Items that cannot be recycled to the consolidated statements of operations |
Abstract |
|
|
ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract |
| 68 |
Investments in equity instruments at FVOCI: |
Abstract |
|
|
ifrs-full:FinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeAbstract |
| 69 |
Loss arising during the period |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeBeforeTax |
| 70 |
Share of other comprehensive loss related to associates and joint ventures |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ReclassificationAdjustmentsOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeBeforeTax |
| 71 |
Investments in equity instruments at FVOCI |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherComprehensiveIncomeBeforeTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome |
| 72 |
Employee benefits - Recognized actuarial gains |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans |
| 73 |
Share of other comprehensive income (loss) related to associates and joint ventures |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossBeforeTax |
| 74 |
Income tax benefit related to components of other comprehensive income that cannot be recycled to the consolidated statements of operations |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss |
| 75 |
Total other comprehensive (loss) income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherComprehensiveIncome |
| 76 |
Equity holders of the parent |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherComprehensiveIncomeAttributableToOwnersOfParent |
| 77 |
Non-controlling interests |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherComprehensiveIncomeAttributableToNoncontrollingInterests |
| 78 |
Total comprehensive income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ComprehensiveIncome |
| 79 |
Total comprehensive income attributable to: |
Abstract |
|
|
ifrs-full:ComprehensiveIncomeAttributableToAbstract |
| 80 |
Equity holders of the parent |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent |
| 81 |
Non-controlling interests |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests |
| 82 |
1003000 - Statement - Consolidated Statements of Financial Position |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ConsolidatedStatementsOfFinancialPosition |
| 83 |
Implied Table |
Table |
* |
* |
implied:Table |
| 84 |
Statement of financial position [abstract] |
Abstract |
|
|
ifrs-full:StatementOfFinancialPositionAbstract |
| 85 |
ASSETS |
Abstract |
|
|
ifrs-full:AssetsAbstract |
| 86 |
Current assets: |
Abstract |
|
|
ifrs-full:CurrentAssetsAbstract |
| 87 |
Cash and cash equivalents |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalents |
| 88 |
Restricted cash |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:RestrictedCashAndCashEquivalents |
| 89 |
Trade accounts receivable and other (including 366 and 406 from related parties at December 31, 2018 and 2017, respectively) |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:TradeAndOtherCurrentReceivables |
| 90 |
Inventories |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Inventories |
| 91 |
Prepaid expenses and other current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentPrepaymentsAndOtherCurrentAssets |
| 92 |
Assets held for sale |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners |
| 93 |
Total current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentAssets |
| 94 |
Non-current assets: |
Abstract |
|
|
ifrs-full:NoncurrentAssetsAbstract |
| 95 |
Goodwill and intangible assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IntangibleAssetsAndGoodwill |
| 96 |
Property, plant and equipment and biological assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PropertyPlantAndEquipment |
| 97 |
Investments in associates and joint ventures |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InvestmentAccountedForUsingEquityMethod |
| 98 |
Other investments |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod |
| 99 |
Deferred tax assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:DeferredTaxAssets |
| 100 |
Other assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherNoncurrentAssets |
| 101 |
Total non-current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentAssets |
| 102 |
Total assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Assets |
| 103 |
LIABILITIES AND EQUITY |
Abstract |
|
|
ifrs-full:EquityAndLiabilitiesAbstract |
| 104 |
Current liabilities: |
Abstract |
|
|
ifrs-full:CurrentLiabilitiesAbstract |
| 105 |
Short-term debt and current portion of long-term debt |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings |
| 106 |
Trade accounts payable and other (including 201 and 260 to related parties at December 31, 2018 and 2017, respectively) |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:TradeAndOtherCurrentPayables |
| 107 |
Short-term provisions |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentProvisions |
| 108 |
Accrued expenses and other liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentAccruedExpensesAndOtherCurrentLiabilities |
| 109 |
Income tax liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentTaxLiabilitiesCurrent |
| 110 |
Liabilities held for sale |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale |
| 111 |
Total current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentLiabilities |
| 112 |
Non-current liabilities: |
Abstract |
|
|
ifrs-full:NoncurrentLiabilitiesAbstract |
| 113 |
Long-term debt, net of current portion |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LongtermBorrowings |
| 114 |
Deferred tax liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DeferredTaxLiabilities |
| 115 |
Deferred employee benefits |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ProvisionsForEmployeeBenefits |
| 116 |
Long-term provisions |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherLongtermProvisions |
| 117 |
Other long-term obligations |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherNoncurrentLiabilities |
| 118 |
Total non-current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentLiabilities |
| 119 |
Total liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Liabilities |
| 120 |
Equity: |
Abstract |
|
|
ifrs-full:EquityAbstract |
| 121 |
Common shares (no par value, 1,151,576,921 and 1,151,576,921 shares authorized, 1,021,903,623 and 1,021,903,623 shares issued, and 1,013,568,258 and 1,019,916,787 shares outstanding at December 31, 2018 and 2017, respectively) |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:IssuedCapital |
| 122 |
Treasury shares (8,335,365 and 1,986,836 common shares at December 31, 2018 and 2017, respectively, at cost) |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:TreasuryShares |
| 123 |
Additional paid-in capital |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:AdditionalPaidinCapital |
| 124 |
Retained earnings |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:RetainedEarnings |
| 125 |
Reserves |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherReserves |
| 126 |
Equity attributable to the equity holders of the parent |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:EquityAttributableToOwnersOfParent |
| 127 |
Non-controlling interests |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncontrollingInterests |
| 128 |
Total equity |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Equity |
| 129 |
Total liabilities and equity |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:EquityAndLiabilities |
| 130 |
1003001 - Statement - Consolidated Statements of Financial Position (Parenthetical) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ConsolidatedStatementsOfFinancialPositionParenthetical |
| 131 |
Implied Table |
Table |
* |
* |
implied:Table |
| 132 |
Statement of financial position [abstract] |
Abstract |
|
|
ifrs-full:StatementOfFinancialPositionAbstract |
| 133 |
Receivables due from related parties |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:TradeAndOtherReceivablesDueFromRelatedParties |
| 134 |
Trade accounts payable and other to related parties |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties |
| 135 |
Shares authorized (in shares) |
Concept (Shares) |
As Of |
|
ifrs-full:NumberOfSharesAuthorised |
| 136 |
Shares issued (in shares) |
Concept (Shares) |
As Of |
|
ifrs-full:NumberOfSharesIssued |
| 137 |
Shares outstanding (in shares) |
Concept (Shares) |
As Of |
|
ifrs-full:NumberOfSharesOutstanding |
| 138 |
Treasury shares (in shares) |
Concept (Shares) |
As Of |
|
mt:NumberOfTreasuryShares |
| 139 |
1004000 - Statement - Consolidated Statements of Changes In Equity Statement |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ConsolidatedStatementsOfChangesInEquityStatement |
| 140 |
Statement of changes in equity [table] |
Table |
* |
* |
ifrs-full:StatementOfChangesInEquityTable |
| 141 |
Components of equity [axis] |
Axis |
|
|
ifrs-full:ComponentsOfEquityAxis |
| 142 |
Total Equity |
Member |
|
|
ifrs-full:EquityMember |
| 143 |
Share capital |
Member |
|
|
ifrs-full:IssuedCapitalMember |
| 144 |
Treasury Shares |
Member |
|
|
ifrs-full:TreasurySharesMember |
| 145 |
Mandatorily convertible notes |
Member |
|
|
ifrs-full:ReserveOfEquityComponentOfConvertibleInstrumentsMember |
| 146 |
Additional Paid-in Capital |
Member |
|
|
ifrs-full:AdditionalPaidinCapitalMember |
| 147 |
Retained Earnings |
Member |
|
|
ifrs-full:RetainedEarningsMember |
| 148 |
Foreign Currency Translation Adjustments |
Member |
|
|
ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember |
| 149 |
Unrealized Gains (Losses) on Derivative Financial Instruments |
Member |
|
|
mt:ReserveOfUnrealizedGainsLossesOnDerivativeFinancialInstrumentsMember |
| 150 |
Unrealized Gains (Losses) on Investments in Equity Instruments at FVOCI |
Member |
|
|
ifrs-full:ReserveOfGainsAndLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember |
| 151 |
Recognized actuarial (losses) gains |
Member |
|
|
ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlansMember |
| 152 |
Equity attributable to the equity holders of the parent |
Member |
|
|
ifrs-full:EquityAttributableToOwnersOfParentMember |
| 153 |
Non-controlling interests |
Member |
|
|
ifrs-full:NoncontrollingInterestsMember |
| 154 |
Statement of changes in equity [line items] |
LineItems |
|
|
ifrs-full:StatementOfChangesInEquityLineItems |
| 155 |
Changes in equity [abstract] |
Abstract |
|
|
ifrs-full:ChangesInEquityAbstract |
| 156 |
Beginning balance (in shares) |
Concept (Shares) |
As Of |
|
ifrs-full:NumberOfSharesOutstanding |
| 157 |
Beginning balance |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Equity |
| 158 |
Net income (including non-controlling interests) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLoss |
| 159 |
Other comprehensive income (loss) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherComprehensiveIncome |
| 160 |
Total comprehensive income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ComprehensiveIncome |
| 161 |
Equity offering (note 10.1) (in shares) |
Concept (Shares) |
For Period |
|
mt:StockIssuedDuringPeriodSharesNewIssues1 |
| 162 |
Equity offering (note 10.1) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IssueOfEquity |
| 163 |
Reduction of the share capital par value (note 10.1) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ReductionOfIssuedCapital |
| 164 |
Conversion of the mandatorily convertible notes (note 10.2) (in shares) |
Concept (Shares) |
For Period |
|
mt:IncreaseDecreaseThroughConversionOfConvertibleInstrumentsShares |
| 165 |
Conversion of the mandatorily convertible notes (note 10.2) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughConversionOfConvertibleInstruments |
| 166 |
Recognition of share-based payments (note 7.3) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions |
| 167 |
Dividend (note 10.4) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:DividendsPaid |
| 168 |
Equity offering in ArcelorMittal South Africa (AMSA) (note 10.5.2) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughChangeInEquityOfSubsidiaries |
| 169 |
Equity share option plan in AMSA (note 10.5.2) |
Concept (Monetary) |
For Period |
Credit |
mt:IncreaseDecreaseThroughShareBasedPaymentTransactionsOfSubsidiariesEquity |
| 170 |
AMSA B-BBEE transaction (note 10.5.2) |
Concept (Monetary) |
For Period |
Credit |
mt:NoncontrollingInterestIncreaseDecreaseRelatedToEmployeeStockOwnershipPlan |
| 171 |
Acquisition |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl |
| 172 |
Mandatory convertible bonds extension (note 10.2) |
Concept (Monetary) |
For Period |
Credit |
mt:IncreaseDecreaseThroughExtensionOfMandatoryConvertibleInstrumentsEquity |
| 173 |
Share buyback (note 10.1) (in shares) |
Concept (Shares) |
For Period |
|
mt:StockRepurchasedDuringPeriodShares1 |
| 174 |
Share buyback (note 10.1) |
Concept (Monetary) |
For Period |
Credit |
mt:AcceleratedShareRepurchaseProgramAdjustment1 |
| 175 |
Change in share capital currency (note 10.1) |
Concept (Monetary) |
For Period |
Credit |
mt:ChangeinShareCapitalCurrency |
| 176 |
Other movements (in shares) |
Concept (Shares) |
For Period |
|
mt:IncreaseDecreaseThroughOtherChangesEquityNumberOfShares |
| 177 |
Other movements |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity |
| 178 |
Ending balance (in shares) |
Concept (Shares) |
As Of |
|
ifrs-full:NumberOfSharesOutstanding |
| 179 |
Ending balance |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Equity |
| 180 |
1004001 - Statement - Consolidated Statements of Changes In Equity Parenthetical (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ConsolidatedStatementsOfChangesInEquityParentheticalDetails |
| 181 |
Implied Table |
Table |
* |
* |
implied:Table |
| 182 |
Statement of changes in equity [abstract] |
Abstract |
|
|
ifrs-full:StatementOfChangesInEquityAbstract |
| 183 |
Reverse stock split ratio |
Concept (Pure) |
For Period |
|
mt:StockholdersEquityNoteStockSplitConversionRatio1 |
| 184 |
Shares outstanding (in shares) |
Concept (Shares) |
As Of |
|
ifrs-full:NumberOfSharesOutstanding |
| 185 |
1005000 - Statement - Consolidated Statements of Cash Flows |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ConsolidatedStatementsOfCashFlows |
| 186 |
Implied Table |
Table |
* |
* |
implied:Table |
| 187 |
Statement of cash flows [abstract] |
Abstract |
|
|
ifrs-full:StatementOfCashFlowsAbstract |
| 188 |
Operating activities: |
Abstract |
|
|
ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract |
| 189 |
Net income (including non-controlling interests) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLoss |
| 190 |
Adjustments to reconcile net income to net cash provided by operations: |
Abstract |
|
|
ifrs-full:AdjustmentsForReconcileProfitLossAbstract |
| 191 |
Depreciation and amortization |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForDepreciationAndAmortisationExpense |
| 192 |
Impairment |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss |
| 193 |
Bargain purchase gain |
Concept (Monetary) |
For Period |
Credit |
mt:AdjustmentsForGainRecognisedInBargainPurchaseTransaction |
| 194 |
Interest expense |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForInterestExpense |
| 195 |
Interest income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:AdjustmentsForInterestIncome |
| 196 |
Income tax (benefit)/ expense |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForIncomeTaxExpense |
| 197 |
Remeasurement loss (gain) relating to US deferred employee benefits |
Concept (Monetary) |
For Period |
Credit |
mt:AdjustmentForRemeasurementGainLossRelatingToDeferredEmployeeBenefits |
| 198 |
Net gain on disposal of subsidiaries |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates |
| 199 |
Income from investments in associates, joint ventures and other investments |
Concept (Monetary) |
For Period |
Credit |
mt:IncomeLossOfAssociatesJointVenturesAndOtherInvestments |
| 200 |
Provision on pensions and OPEB |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities |
| 201 |
Change in fair value adjustment on call option on mandatory convertible bonds and pellet purchase agreement |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:AdjustmentsForGainsLossesOnChangeInFairValueOfDerivatives |
| 202 |
Unrealized foreign exchange effects |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForUnrealisedForeignExchangeLossesGains |
| 203 |
Write-downs (reversal) of inventories to net realizable value, provisions and other non-cash operating expenses net |
Concept (Monetary) |
For Period |
Debit |
mt:AdjustmentForWriteDownsReversalOfInventoriesToNetRealizableValueProvisionsAndNonCashItems |
| 204 |
Changes in assets and liabilities that provided (required) cash, net of acquisitions: |
Abstract |
|
|
mt:IncreaseDecreaseinOperatingCapitalAbstract |
| 205 |
Trade accounts receivable |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable |
| 206 |
Inventories |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForDecreaseIncreaseInInventories |
| 207 |
Trade accounts payable and other |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAccountPayable |
| 208 |
Interest paid |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:InterestPaidClassifiedAsOperatingActivities |
| 209 |
Interest received |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:InterestReceivedClassifiedAsOperatingActivities |
| 210 |
Income taxes paid |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities |
| 211 |
Dividends received from associates, joint ventures and other investments |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:DividendsReceivedClassifiedAsOperatingActivities |
| 212 |
Cash contributions to plan assets and benefits paid for pensions and OPEB |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseInNetAssetsAvailableForBenefits |
| 213 |
VAT and other amounts received (paid) from/to public authorities |
Concept (Monetary) |
For Period |
Debit |
mt:AdjustmentsForValueAddedTaxAndOtherAmountsReceivedFromPaidToPublicAuthorities |
| 214 |
Other working capital and provisions movements |
Concept (Monetary) |
For Period |
Credit |
mt:IncreaseDecreaseInOtherWorkingCapitalAndOtherProvisions |
| 215 |
Net cash provided by operating activities |
Concept (Monetary) |
For Period |
|
ifrs-full:CashFlowsFromUsedInOperatingActivities |
| 216 |
Investing activities: |
Abstract |
|
|
ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract |
| 217 |
Purchase of property, plant and equipment and intangibles |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets |
| 218 |
Disposals of net assets of subsidiaries, net of cash disposed of 1, 13 and nil in 2018, 2017 and 2016, respectively |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities |
| 219 |
Acquisitions of net assets of subsidiaries, net of cash acquired of 13, 617 and 63 in 2018, 2017 and 2016, respectively |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities |
| 220 |
Acquisition of Uttam Galva and KSS Petron debt |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherCashPaymentsToAcquireEquityOrDebtInstrumentsOfOtherEntitiesClassifiedAsInvestingActivities |
| 221 |
Disposals of associates and joint ventures |
Concept (Monetary) |
For Period |
Debit |
mt:OtherCashReceiptsFromSalesOfInterestsInAssociatesAndJointVenturesClassifiedAsInvestingActivities |
| 222 |
Disposals of financial assets |
Concept (Monetary) |
For Period |
Credit |
mt:ProceedsFromSalesOfFinancialAssets |
| 223 |
Other investing activities net |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities |
| 224 |
Net cash used in investing activities |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CashFlowsFromUsedInInvestingActivities |
| 225 |
Financing activities: |
Abstract |
|
|
ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract |
| 226 |
(Acquisition)/ Disposal of non-controlling interests |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromContributionsOfNoncontrollingInterests |
| 227 |
Proceeds from put and call option on shares |
Concept (Monetary) |
For Period |
Debit |
mt:ProceedsFromDerivativeInstrumentFinancingActivities1 |
| 228 |
Proceeds from short-term debt |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromCurrentBorrowings |
| 229 |
Proceeds from long-term debt |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromNoncurrentBorrowings |
| 230 |
Payments of short-term debt |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RepaymentsOfCurrentBorrowings |
| 231 |
Payments of long-term debt |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RepaymentsOfNoncurrentBorrowings |
| 232 |
Equity offering |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromIssuingShares |
| 233 |
Share buyback |
Concept (Monetary) |
For Period |
Credit |
mt:PaymentsForRepurchaseOfEquity1 |
| 234 |
Dividends paid (includes 119, 141 and 61 of dividends paid to non-controlling shareholders in 2018, 2017 and 2016, respectively) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DividendsPaidClassifiedAsFinancingActivities |
| 235 |
Other financing activities net |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities |
| 236 |
Net cash used in financing activities |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CashFlowsFromUsedInFinancingActivities |
| 237 |
Net increase (decrease) in cash and cash equivalents |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges |
| 238 |
Effect of exchange rate changes on cash |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents |
| 239 |
Cash and cash equivalents: |
Abstract |
|
|
ifrs-full:CashAndCashEquivalentsAbstract |
| 240 |
At the beginning of the year |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalents |
| 241 |
Reclassification of the period-end cash and cash equivalents from (to) held for sale |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalentsClassifiedAsPartOfDisposalGroupHeldForSale |
| 242 |
At the end of the year |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalents |
| 243 |
1005001 - Statement - Consolidated Statements of Cash Flows (Parenthetical) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ConsolidatedStatementsOfCashFlowsParenthetical |
| 244 |
Implied Table |
Table |
* |
* |
implied:Table |
| 245 |
Statement of cash flows [abstract] |
Abstract |
|
|
ifrs-full:StatementOfCashFlowsAbstract |
| 246 |
Cash disposed |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CashAndCashEquivalentsInSubsidiaryOrBusinessesAcquiredOrDisposed2013 |
| 247 |
Cash acquired from acquisition |
Concept (Monetary) |
For Period |
Debit |
mt:CashAcquiredfromAcquisition |
| 248 |
Dividends paid to non-controlling shareholders |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DividendsPaidToNoncontrollingInterests |
| 249 |
2101100 - Disclosure - ACCOUNTING PRINCIPLES |
Network |
* |
* |
http://corporate.arcelormittal.com/role/AccountingPrinciples |
| 250 |
Implied Table |
Table |
* |
* |
implied:Table |
| 251 |
General Information About Financial Statements [Abstract] |
Abstract |
|
|
mt:GeneralInformationAboutFinancialStatementsAbstract |
| 252 |
ACCOUNTING PRINCIPLES |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory |
| 253 |
2105100 - Disclosure - SCOPE OF CONSOLIDATION |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidation |
| 254 |
Implied Table |
Table |
* |
* |
implied:Table |
| 255 |
Basis Of Consolidation [Abstract] |
Abstract |
|
|
mt:BasisOfConsolidationAbstract |
| 256 |
SCOPE OF CONSOLIDATION |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfBasisOfConsolidationExplanatory |
| 257 |
2107100 - Disclosure - SEGMENT REPORTING |
Network |
* |
* |
http://corporate.arcelormittal.com/role/SegmentReporting |
| 258 |
Implied Table |
Table |
* |
* |
implied:Table |
| 259 |
Operating Segments [Abstract] |
Abstract |
|
|
mt:OperatingSegmentsAbstract |
| 260 |
Segment Reporting |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory |
| 261 |
2134100 - Disclosure - OPERATING DATA |
Network |
* |
* |
http://corporate.arcelormittal.com/role/OperatingData |
| 262 |
Implied Table |
Table |
* |
* |
implied:Table |
| 263 |
Revenue, Cost Of Sales, Current Assets, And Current Liabilities [Abstract] |
Abstract |
|
|
mt:RevenueCostOfSalesCurrentAssetsAndCurrentLiabilitiesAbstract |
| 264 |
Operating Data |
Concept (Text Block (HTML)) |
For Period |
|
mt:DisclosureOfRevenueCostOfSalesCurrentAssetsAndCurrentLiabilitiesTextBlock |
| 265 |
2136100 - Disclosure - GOODWILL, INTANGIBLE AND TANGIBLE ASSETS |
Network |
* |
* |
http://corporate.arcelormittal.com/role/GoodwillIntangibleAndTangibleAssets |
| 266 |
Implied Table |
Table |
* |
* |
implied:Table |
| 267 |
Intangible Assets [Abstract] |
Abstract |
|
|
mt:IntangibleAssetsAbstract |
| 268 |
GOODWILL, INTANGIBLE AND TANGIBLE ASSETS |
Concept (Text Block (HTML)) |
For Period |
|
mt:DisclosureOfGoodwillAndIntangibleAssetsAndPropertyPlantAndEquipmentTextBlock |
| 269 |
2140100 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstruments |
| 270 |
Implied Table |
Table |
* |
* |
implied:Table |
| 271 |
Financial Instruments [Abstract] |
Abstract |
|
|
mt:FinancialInstrumentsAbstract |
| 272 |
FINANCING AND FINANCIAL INSTRUMENTS |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfFinancialInstrumentsExplanatory |
| 273 |
2141100 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefits |
| 274 |
Implied Table |
Table |
* |
* |
implied:Table |
| 275 |
Employee Benefits [Abstract] |
Abstract |
|
|
mt:EmployeeBenefitsAbstract |
| 276 |
Personnel expenses and deferred employee benefits |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfEmployeeBenefitsExplanatory |
| 277 |
2142100 - Disclosure - PROVISIONS, CONTINGENCIES AND COMMITMENTS |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ProvisionsContingenciesAndCommitments |
| 278 |
Implied Table |
Table |
* |
* |
implied:Table |
| 279 |
Disclosure of Other Provisions, Contingent Liabilities and Commitments [Abstract] |
Abstract |
|
|
mt:DisclosureofOtherProvisionsContingentLiabilitiesandCommitmentsAbstract |
| 280 |
PROVISIONS, CONTINGENCIES AND COMMITMENTS |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfProvisionsExplanatory |
| 281 |
2146100 - Disclosure - INCOME TAXES |
Network |
* |
* |
http://corporate.arcelormittal.com/role/IncomeTaxes |
| 282 |
Implied Table |
Table |
* |
* |
implied:Table |
| 283 |
Income Taxes [Abstract] |
Abstract |
|
|
mt:IncomeTaxesAbstract |
| 284 |
Income Taxes |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfIncomeTaxExplanatory |
| 285 |
2147100 - Disclosure - EQUITY |
Network |
* |
* |
http://corporate.arcelormittal.com/role/Equity |
| 286 |
Implied Table |
Table |
* |
* |
implied:Table |
| 287 |
Share Capital, Reserves And Other Equity Interest [Abstract] |
Abstract |
|
|
mt:ShareCapitalReservesAndOtherEquityInterestAbstract |
| 288 |
Equity |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory |
| 289 |
2148100 - Disclosure - RELATED PARTIES |
Network |
* |
* |
http://corporate.arcelormittal.com/role/RelatedParties |
| 290 |
Implied Table |
Table |
* |
* |
implied:Table |
| 291 |
Related Party [Abstract] |
Abstract |
|
|
mt:RelatedPartyAbstract |
| 292 |
Related Parties |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfRelatedPartyExplanatory |
| 293 |
2149100 - Disclosure - SUBSEQUENT EVENTS (Notes) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/SubsequentEventsNotes |
| 294 |
Implied Table |
Table |
* |
* |
implied:Table |
| 295 |
Subsequent Events1 [Abstract] |
Abstract |
|
|
mt:SubsequentEvents1Abstract |
| 296 |
SUBSEQUENT EVENTS |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory |
| 297 |
2201201 - Disclosure - ACCOUNTING PRINCIPLES (Policies) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/AccountingPrinciplesPolicies |
| 298 |
Implied Table |
Table |
* |
* |
implied:Table |
| 299 |
General Information About Financial Statements [Abstract] |
Abstract |
|
|
mt:GeneralInformationAboutFinancialStatementsAbstract |
| 300 |
Basis of presentation |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:ExplanationOfMeasurementBasesUsedInPreparingFinancialStatements |
| 301 |
Use of judgment and estimates |
Concept (Text Block (HTML)) |
For Period |
|
mt:UseofEstimatesPolicyPolicyTextBlock |
| 302 |
Critical accounting policies |
Concept (Text Block (HTML)) |
For Period |
|
mt:CriticalAccountingPoliciesPolicyTextBlock |
| 303 |
Adoption of new IFRS standards, amendments and interpretations applicable from January 1, 2018 |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfInitialApplicationOfStandardsOrInterpretations |
| 304 |
New IFRS standards, amendments and interpretations from 2019 onward |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretations |
| 305 |
Basis of consolidation |
Concept (Text Block (HTML)) |
For Period |
|
mt:DescriptionofAccountingPolicyForBasisOfConsolidationPolicyTextBlock |
| 306 |
Investment in associates and joint ventures |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForInvestmentInAssociatesAndJointVenturesExplanatory |
| 307 |
Investments in equity instruments at FVOCI |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForFinancialAssetsExplanatory |
| 308 |
Functional currency |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForFunctionalCurrencyExplanatory |
| 309 |
Business combinations |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForBusinessCombinationsExplanatory |
| 310 |
Divestments and assets held for sale |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsExplanatory |
| 311 |
Reportable segments |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory |
| 312 |
Revenue |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue |
| 313 |
Trade accounts receivable and other |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForTradeAndOtherReceivablesExplanatory |
| 314 |
Inventories |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories |
| 315 |
Intangible assets |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory |
| 316 |
Property, plant and equipment and biological assets |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory |
| 317 |
Biological assets |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForBiologicalAssetsExplanatory |
| 318 |
Lease arrangements |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory |
| 319 |
Impairment of assets |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory |
| 320 |
Fair value measurement |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForFairValueMeasurementExplanatory |
| 321 |
Borrowings |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForBorrowingsExplanatory |
| 322 |
Cash and cash equivalents |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents |
| 323 |
Restricted cash |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForRestrictedCashAndCashEquivalentsExplanatory |
| 324 |
Derivative financial instruments |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForDerivativeFinancialInstrumentsAndHedgingExplanatory |
| 325 |
Other non-derivative financial assets and liabilities |
Concept (Text Block (HTML)) |
For Period |
|
mt:OtherNonDerivativeFinancialAssetsAndLiabilitiesPolicyTextBlock |
| 326 |
Hedge accounting policy |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForHedgingExplanatory |
| 327 |
Share-based payments |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfSharebasedPaymentArrangementsExplanatory |
| 328 |
Provisions |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory |
| 329 |
Deferred income tax |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForDeferredIncomeTaxExplanatory |
| 330 |
Impairment of financial assets |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfFinancialAssetsExplanatory |
| 331 |
Deferred employee benefits |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory |
| 332 |
Earnings per share |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory |
| 333 |
Transactions with non-controlling interests |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForTransactionsWithNoncontrollingInterestsExplanatory |
| 334 |
2305301 - Disclosure - SCOPE OF CONSOLIDATION (Tables) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidationTables |
| 335 |
Implied Table |
Table |
* |
* |
implied:Table |
| 336 |
Basis Of Consolidation [Abstract] |
Abstract |
|
|
mt:BasisOfConsolidationAbstract |
| 337 |
Schedule of subsidiaries |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfInterestsInSubsidiariesExplanatory |
| 338 |
Disclosure of detailed information about business combinations |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfDetailedInformationAboutBusinessCombinationsExplanatory |
| 339 |
Disclosure of significant divestments |
Concept (Text Block (HTML)) |
For Period |
|
mt:DisposalGroupsIncludingDiscontinuedOperations1TableTextBlock |
| 340 |
Details of assets and liabilities held for sale |
Concept (Text Block (HTML)) |
For Period |
|
mt:DisclosureOfDisposalGroupsClassifiedAsHeldForSaleTableTextBlock |
| 341 |
Investments accounted for under equity method |
Concept (Text Block (HTML)) |
For Period |
|
mt:InvestmentInAssociatesAndJointVenturesAccountedForUsingEquityMethodTableTextBlock |
| 342 |
Joint ventures |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfJointVenturesExplanatory |
| 343 |
Associates |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesExplanatory |
| 344 |
Other associates and joint ventures that are not individually material |
Concept (Text Block (HTML)) |
For Period |
|
mt:OtherAssociatesAndJointVenturesThatAreNotIndividuallyMaterialTableTextBlock |
| 345 |
Other investments |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodExplanatory |
| 346 |
Call options' strike prices of unconsolidated structured entities |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfUnconsolidatedStructuredEntitiesExplanatory |
| 347 |
Income (loss) from investments in associates, joint ventures and other investments |
Concept (Text Block (HTML)) |
For Period |
|
mt:DisclosureOfIncomeLossFromInvestmentsTableTextBlock |
| 348 |
2307301 - Disclosure - SEGMENT REPORTING (Tables) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/SegmentReportingTables |
| 349 |
Implied Table |
Table |
* |
* |
implied:Table |
| 350 |
Operating Segments [Abstract] |
Abstract |
|
|
mt:OperatingSegmentsAbstract |
| 351 |
Schedule of Segment Reporting Information, by Segment |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfOperatingSegmentsExplanatory |
| 352 |
Reconciliation of Operating Income (Loss) to Net Income |
Concept (Text Block (HTML)) |
For Period |
|
mt:ReconciliationOfOperatingIncomeLossToNetIncomeTableTextBlock |
| 353 |
Disclosure of Geographical Areas |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfGeographicalAreasExplanatory |
| 354 |
Disclosure of Products and Services |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfProductsAndServicesExplanatory |
| 355 |
Disclosure of disaggregation of revenue from contracts with customers |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersExplanatory |
| 356 |
2334301 - Disclosure - OPERATING DATA (Tables) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/OperatingDataTables |
| 357 |
Implied Table |
Table |
* |
* |
implied:Table |
| 358 |
Revenue, Cost Of Sales, Current Assets, And Current Liabilities [Abstract] |
Abstract |
|
|
mt:RevenueCostOfSalesCurrentAssetsAndCurrentLiabilitiesAbstract |
| 359 |
Schedule of Movements in Trade and Other Receivables |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:ExplanationOfSignificantChangesInContractAssetsAndContractLiabilitiesExplanatory |
| 360 |
Schedule of Cost of Sales |
Concept (Text Block (HTML)) |
For Period |
|
mt:ScheduleOfCostOfSalesTableTextBlock |
| 361 |
Schedule of Trade Accounts Receivable and Allowance for Doubtful Accounts |
Concept (Text Block (HTML)) |
For Period |
|
mt:ScheduleOfAccountsNotesLoansAndFinancingReceivableTableTextBlock |
| 362 |
Exposure to Credit Risk by Reportable Segment |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfCreditRiskExposureExplanatory |
| 363 |
Aging of Trade Accounts Receivable |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfProvisionMatrixExplanatory |
| 364 |
Movement in the Allowance for Doubtful Accounts |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsExplanatory |
| 365 |
Schedule of Inventories |
Concept (Text Block (HTML)) |
For Period |
|
mt:ScheduleOfInventoryCurrent1TableTextBlock |
| 366 |
Movement in Inventory Reserve |
Concept (Text Block (HTML)) |
For Period |
|
mt:ChangesinInventoryReserveTableTextBlock |
| 367 |
Schedule of Prepaid Expenses and Other Current Assets |
Concept (Text Block (HTML)) |
For Period |
|
mt:DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosure1TableTextBlock |
| 368 |
Schedule of Other Assets |
Concept (Text Block (HTML)) |
For Period |
|
mt:ScheduleOfOtherAssetsNoncurrent1TableTextBlock |
| 369 |
Schedule of Accrued Expenses and Other Liabilities |
Concept (Text Block (HTML)) |
For Period |
|
mt:ScheduleOfAccruedLiabilitiesAndOtherCurrentLiabilitiesTableTextBlock |
| 370 |
2336301 - Disclosure - GOODWILL, INTANGIBLE AND TANGIBLE ASSETS (Tables) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/GoodwillIntangibleAndTangibleAssetsTables |
| 371 |
Implied Table |
Table |
* |
* |
implied:Table |
| 372 |
Intangible Assets [Abstract] |
Abstract |
|
|
mt:IntangibleAssetsAbstract |
| 373 |
Schedule of Goodwill and Intangible Assets |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory |
| 374 |
Schedule of Goodwill Acquired |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillExplanatory |
| 375 |
Schedule of Property, Plant and Equipment |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory |
| 376 |
Schedule of Future Minimum Lease Payments |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeExplanatory |
| 377 |
Schedule of Key Assumptions in Project Earnings |
Concept (Text Block (HTML)) |
For Period |
|
mt:ScheduleOfKeyAssumptionsInProjectEarningsTableTextBlock |
| 378 |
Schedule of Impairment of Assets |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfImpairmentOfAssetsExplanatory |
| 379 |
2340301 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS (Tables) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsTables |
| 380 |
Implied Table |
Table |
* |
* |
implied:Table |
| 381 |
Financial Instruments [Abstract] |
Abstract |
|
|
mt:FinancialInstrumentsAbstract |
| 382 |
Disclosure of impact of the adoption of IFRS 9 on financial assets |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfFinancialAssetsAtDateOfInitialApplicationOfIFRS9Explanatory |
| 383 |
Disclosure of assets based on categories |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfFinancialAssetsExplanatory |
| 384 |
Disclosure of liabilities based on categories |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfFinancialLiabilitiesExplanatory |
| 385 |
Disclosure of fair value measurement of assets |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfFairValueMeasurementOfAssetsExplanatory |
| 386 |
Disclosure of fair value measurement of liabilities |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfFairValueMeasurementOfLiabilitiesExplanatory |
| 387 |
Disclosure of detailed information about borrowings |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory |
| 388 |
Disclosure of estimated fair value and carrying value of debt |
Concept (Text Block (HTML)) |
For Period |
|
mt:DisclosureOfEstimatedFairValueAndCarryingValueOfDebtTableTextBlock |
| 389 |
Disclosure of cash and cash equivalents |
Concept (Text Block (HTML)) |
For Period |
|
mt:DisclosureOfCashAndCashEquivalentsExplanatoryTableTextBlock |
| 390 |
Reconciliation of liabilities arising from financing activities |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesExplanatory |
| 391 |
Schedule of net debt by currency |
Concept (Text Block (HTML)) |
For Period |
|
mt:DisclosureOfNetDebtByCurrencyExplanatoryTableTextBlock |
| 392 |
Disclosure of detailed information about financial instruments |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfDetailedInformationAboutFinancialInstrumentsExplanatory |
| 393 |
Analysis of financing cost |
Concept (Text Block (HTML)) |
For Period |
|
mt:DisclosureOfFinanceCostExplanatoryTableTextBlock |
| 394 |
Disclosure of capital management |
Concept (Text Block (HTML)) |
For Period |
|
mt:DisclosureOfCapitalManagementExplanatoryTableTextBlock |
| 395 |
Disclosure of nature and extent of risks arising from financial instruments |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsExplanatory |
| 396 |
Sensitivity analysis for types of market risk |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:SensitivityAnalysisForEachTypeOfMarketRisk |
| 397 |
Disclosure of maturity analysis for non-derivative financial liabilities |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:MaturityAnalysisForNonderivativeFinancialLiabilities |
| 398 |
Disclosure of maturity analysis for derivative financial liabilities |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:MaturityAnalysisForDerivativeFinancialLiabilities |
| 399 |
Disclosure of information about terms and conditions of cash flow hedges |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfInformationAboutTermsAndConditionsOfHedgingInstrumentsAndHowTheyAffectFutureCashFlowsExplanatory |
| 400 |
Disclosure of detailed information about hedging instruments |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfDetailedInformationAboutHedgingInstrumentsExplanatory |
| 401 |
Disclosure of detailed information about hedged items |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfDetailedInformationAboutHedgedItemsExplanatory |
| 402 |
2341301 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS (Tables) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsTables |
| 403 |
Implied Table |
Table |
* |
* |
implied:Table |
| 404 |
Employee Benefits [Abstract] |
Abstract |
|
|
mt:EmployeeBenefitsAbstract |
| 405 |
Disclosure of employees total annual compensation |
Concept (Text Block (HTML)) |
For Period |
|
mt:DisclosureOfEmployeesCompensationCostsTableTextBlock |
| 406 |
Disclosure of information about key management personnel |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfInformationAboutKeyManagementPersonnelExplanatory |
| 407 |
Disclosure of net defined benefit liability (asset) |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory |
| 408 |
Components of net periodic pension cost |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfAdditionalInformationAboutDefinedBenefitPlansExplanatory |
| 409 |
Expenses recognized in the income statement |
Concept (Text Block (HTML)) |
For Period |
|
mt:DisclosureOfDefinedBenefitPlanExpenseRecognizedInProfitOrLossExplanatoryTableTextBlock |
| 410 |
Schedule of weighted-average asset allocations for the funded defined benefit pension plans by asset category |
Concept (Text Block (HTML)) |
For Period |
|
mt:ScheduleofweightedaverageassetallocationsforthefundeddefinedbenefitpensionplansbyassetcategoryTableTextBlock |
| 411 |
Disclosure of fair value of plan assets |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfFairValueOfPlanAssetsExplanatory |
| 412 |
Actuarial assumptions for defined benefit plans |
Concept (Text Block (HTML)) |
For Period |
|
mt:ActuarialassumptionsfordefinedbenefitplansTableTextBlock |
| 413 |
Disclosure of defined benefit plans |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfDefinedBenefitPlansExplanatory |
| 414 |
Disclosure of sensitivity analysis for actuarial assumptions |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsExplanatory |
| 415 |
Disclosure of exercise prices of outstanding share options |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory |
| 416 |
Changes in stock options issued |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory |
| 417 |
Number and weighted average remaining contractual life of outstanding share options |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsExplanatory |
| 418 |
Terms and conditions of share-based payment arrangements |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementExplanatory |
| 419 |
Summary of share unit plans outstanding |
Concept (Text Block (HTML)) |
For Period |
|
mt:DisclosureofotherequityinstrumentsTableTextBlock |
| 420 |
Schedule of share unit plan activity |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfOtherEquityInstrumentsExplanatory |
| 421 |
2342301 - Disclosure - PROVISIONS, CONTINGENCIES AND COMMITMENTS (Tables) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ProvisionsContingenciesAndCommitmentsTables |
| 422 |
Implied Table |
Table |
* |
* |
implied:Table |
| 423 |
Disclosure of Other Provisions, Contingent Liabilities and Commitments [Abstract] |
Abstract |
|
|
mt:DisclosureofOtherProvisionsContingentLiabilitiesandCommitmentsAbstract |
| 424 |
Disclosure of changes in provisions |
Concept (Text Block (HTML)) |
For Period |
|
mt:DisclosureofChangesinProvisionsTableTextBlock |
| 425 |
Disclosure of other long-term obligations |
Concept (Text Block (HTML)) |
For Period |
|
mt:OtherNoncurrentLiabilitiesTableTextBlock |
| 426 |
Disclosure of commitment obligations |
Concept (Text Block (HTML)) |
For Period |
|
mt:DisclosureofCommitmentObligationsTableTextBlock |
| 427 |
Disclosure of operating lease by lessee |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeExplanatory |
| 428 |
2346301 - Disclosure - INCOME TAXES (Tables) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/IncomeTaxesTables |
| 429 |
Implied Table |
Table |
* |
* |
implied:Table |
| 430 |
Income Taxes [Abstract] |
Abstract |
|
|
mt:IncomeTaxesAbstract |
| 431 |
Components of income tax expense (benefit) |
Concept (Text Block (HTML)) |
For Period |
|
mt:ScheduleofComponentsofIncomeTaxExpenseBenefitTableTextBlock |
| 432 |
Effective income tax rate reconciliation |
Concept (Text Block (HTML)) |
For Period |
|
mt:ScheduleofEffectiveIncomeTaxRateReconciliationTableTextBlock |
| 433 |
Schedule of permanent items |
Concept (Text Block (HTML)) |
For Period |
|
mt:ScheduleofPermanentItemsTableTextBlock |
| 434 |
Schedule of other tax item |
Concept (Text Block (HTML)) |
For Period |
|
mt:ScheduleofOtherTaxItemsTableTextBlock |
| 435 |
Disclosure of income tax recorded directly in equity |
Concept (Text Block (HTML)) |
For Period |
|
mt:DisclosureOfIncomeTaxRecordedDirectlyInEquityTableTextBlock |
| 436 |
Disclosure of temporary difference, unused tax losses and unused tax credits |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory |
| 437 |
2347301 - Disclosure - EQUITY (Tables) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/EquityTables |
| 438 |
Implied Table |
Table |
* |
* |
implied:Table |
| 439 |
Share Capital, Reserves And Other Equity Interest [Abstract] |
Abstract |
|
|
mt:ShareCapitalReservesAndOtherEquityInterestAbstract |
| 440 |
Classes of share capital |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfClassesOfShareCapitalExplanatory |
| 441 |
Earnings per share |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:EarningsPerShareExplanatory |
| 442 |
Dividends |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfDividendsExplanatory |
| 443 |
Schedule of subsidiaries |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfInterestsInSubsidiariesExplanatory |
| 444 |
Financial information of subsidiaries with material non-controlling interests |
Concept (Text Block (HTML)) |
For Period |
|
mt:DisclosureOfFinancialInformationOfSubsidiariesWithMaterialNoncontrollingInterestsExplanatoryTableTextBlock |
| 445 |
Schedule of change in equity of subsidiaries, noncontrolling interests explanatory |
Concept (Text Block (HTML)) |
For Period |
|
mt:ScheduleOfChangeInEquityOfSubsidiariesNoncontrollingInterestsExplanatoryTableTextBlock |
| 446 |
2348301 - Disclosure - RELATED PARTIES (Tables) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/RelatedPartiesTables |
| 447 |
Implied Table |
Table |
* |
* |
implied:Table |
| 448 |
Related Party [Abstract] |
Abstract |
|
|
mt:RelatedPartyAbstract |
| 449 |
Disclosure of transactions between related parties |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory |
| 450 |
2401402 - Disclosure - ACCOUNTING PRINCIPLES (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/AccountingPrinciplesDetails |
| 451 |
Disclosure of detailed information about financial instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialInstrumentsTable |
| 452 |
Classes of assets [axis] |
Axis |
|
|
ifrs-full:ClassesOfAssetsAxis |
| 453 |
Assets [member] |
Member |
|
|
ifrs-full:ClassesOfAssetsMember |
| 454 |
Short-term leases |
Member |
|
|
mt:ShortTermLeasesMember |
| 455 |
Low-value asset leases |
Member |
|
|
mt:LowValueAssetLeasesMember |
| 456 |
Other lease assets |
Member |
|
|
mt:OtherLeaseAssetsMember |
| 457 |
Operating leases held for sale |
Member |
|
|
mt:OperatingLeasesHeldForSaleMember |
| 458 |
Scenario [Axis] |
Axis |
|
|
mt:Scenario1Axis |
| 459 |
Scenario [Domain] |
Member |
|
|
mt:ScenarioDomain |
| 460 |
Forecast |
Member |
|
|
mt:ScenarioForecast1Member |
| 461 |
Subsequent Event Type1 [Axis] |
Axis |
|
|
mt:SubsequentEventType1Axis |
| 462 |
Subsequent Event Type1 [Domain] |
Member |
|
|
mt:SubsequentEventType1Domain |
| 463 |
Subsequent Event |
Member |
|
|
mt:SubsequentEvent1Member |
| 464 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 465 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 466 |
Mandatorily convertible unsecured unsubordinated bonds |
Member |
|
|
mt:MandatorilyConvertibleUnsecuredUnsubordinatedBondsMember |
| 467 |
Disclosure of detailed information about financial instruments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialInstrumentsLineItems |
| 468 |
Notional amount |
Concept (Monetary) |
As Of |
|
ifrs-full:NotionalAmount |
| 469 |
Non-cancellable operating lease commitments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease |
| 470 |
Non-cancellable operating leases expected to be recognzied in the next 12 months |
Concept (Monetary) |
As Of |
Credit |
mt:MinimumLeasePaymentsPayableUnderNonCancellableOperatingleaseExpectedToBeRecognizedIntheNextTwelveMonths |
| 471 |
Right-of-use assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:RightofuseAssets |
| 472 |
2405402 - Disclosure - SCOPE OF CONSOLIDATION - List of Subsidiaries (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidationListOfSubsidiariesDetails |
| 473 |
Disclosure of subsidiaries [table] |
Table |
* |
* |
ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable |
| 474 |
Subsidiaries [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInSubsidiariesAxis |
| 475 |
Entity's total for subsidiaries [member] |
Member |
|
|
ifrs-full:EntitysTotalForSubsidiariesMember |
| 476 |
ArcelorMittal Dofasco G.P. |
Member |
|
|
mt:ArcelorMittalDofascoG.P.Member |
| 477 |
ArcelorMittal México S.A. de C.V. |
Member |
|
|
mt:ArcelorMittalMexicoS.A.deC.V.Member |
| 478 |
ArcelorMittal USA LLC |
Member |
|
|
mt:ArcelorMittalUSALLCMember |
| 479 |
ArcelorMittal Long Products Canada G.P. |
Member |
|
|
mt:ArcelorMittalLongProductsCanadaG.P.Member |
| 480 |
ArcelorMittal Brasil S.A. |
Member |
|
|
mt:ArcelorMittalBrasilS.A.Member |
| 481 |
Acindar Industria Argentina de Aceros S.A. |
Member |
|
|
mt:AcindarIndustriaArgentinadeAcerosS.A.Member |
| 482 |
ArcelorMittal Atlantique et Lorraine S.A.S. |
Member |
|
|
mt:ArcelorMittalAtlantiqueetLorraineS.A.S.Member |
| 483 |
ArcelorMittal Belgium N.V. |
Member |
|
|
mt:ArcelorMittalBelgiumN.V.Member |
| 484 |
ArcelorMittal España S.A. |
Member |
|
|
mt:ArcelorMittalEspaaS.A.Member |
| 485 |
ArcelorMittal Flat Carbon Europe S.A. |
Member |
|
|
mt:ArcelorMittalFlatCarbonEuropeS.A.Member |
| 486 |
ArcelorMittal Galati S.A. |
Member |
|
|
mt:ArcelorMittalGalatiS.A.Member |
| 487 |
ArcelorMittal Poland S.A. |
Member |
|
|
mt:ArcelorMittalPolandS.A.Member |
| 488 |
ArcelorMittal Eisenhüttenstadt GmbH |
Member |
|
|
mt:ArcelorMittalEisenhttenstadtGmbHMember |
| 489 |
ArcelorMittal Bremen GmbH |
Member |
|
|
mt:ArcelorMittalBremenGmbHMember |
| 490 |
ArcelorMittal Méditerranée S.A.S. |
Member |
|
|
mt:ArcelorMittalMediterraneS.A.S.Member |
| 491 |
ArcelorMittal Belval & Differdange S.A. |
Member |
|
|
mt:ArcelorMittalBelvalDifferdangeS.A.Member |
| 492 |
ArcelorMittal Hamburg GmbH |
Member |
|
|
mt:ArcelorMittalHamburgGmbHMember |
| 493 |
ArcelorMittal Ostrava a.s. |
Member |
|
|
mt:ArcelorMittalOstravaa.s.Member |
| 494 |
ArcelorMittal Duisburg GmbH |
Member |
|
|
mt:ArcelorMittalDuisburgGmbHMember |
| 495 |
ArcelorMittal International Luxembourg S.A. |
Member |
|
|
mt:ArcelorMittalInternationalLuxembourgS.A.Member |
| 496 |
ArcelorMittal Italia S.p.A. |
Member |
|
|
mt:ArcelorMittalItaliaS.p.AMember |
| 497 |
ArcelorMittal South Africa Ltd. (AMSA) |
Member |
|
|
mt:ArcelorMittalSouthAfricaLtd.Member |
| 498 |
JSC ArcelorMittal Temirtau |
Member |
|
|
mt:JSCArcelorMittalTemirtauMember |
| 499 |
PJSC ArcelorMittal Kryvyi Rih (AM Kryvyi Rih) |
Member |
|
|
mt:PJSCArcelorMittalKryvyiRihMember |
| 500 |
ArcelorMittal Mining Canada G.P. and ArcelorMittal Infrastructure G.P. |
Member |
|
|
mt:ArcelorMittalMiningCanadaG.P.andArcelorMittalInfrastructureG.P.Member |
| 501 |
ArcelorMittal Liberia Ltd |
Member |
|
|
mt:ArcelorMittalLiberiaLtdMember |
| 502 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 503 |
Segments [member] |
Member |
|
|
ifrs-full:SegmentsMember |
| 504 |
NAFTA |
Member |
|
|
mt:NAFTAMember |
| 505 |
Brazil |
Member |
|
|
mt:BrazilSegmentMember |
| 506 |
Europe |
Member |
|
|
mt:EuropeSegmentMember |
| 507 |
ACIS |
Member |
|
|
mt:ACISMember |
| 508 |
Mining |
Member |
|
|
mt:MiningMember |
| 509 |
Business combinations [axis] |
Axis |
|
|
ifrs-full:BusinessCombinationsAxis |
| 510 |
Entity's total for business combinations [member] |
Member |
|
|
ifrs-full:EntitysTotalForBusinessCombinationsMember |
| 511 |
Votorantim S.A. |
Member |
|
|
mt:VotorantimSiderurgiaMember |
| 512 |
Disclosure of subsidiaries [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems |
| 513 |
Proportion of ownership interest in subsidiary |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestInSubsidiary |
| 514 |
Proportion of ownership interests held by non-controlling interests |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests |
| 515 |
2405403 - Disclosure - SCOPE OF CONSOLIDATION - Translation of Financial Statements Denominated in Foreign Currency (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidationTranslationOfFinancialStatementsDenominatedInForeignCurrencyDetails |
| 516 |
Entities [Table] |
Table |
* |
* |
dei:EntitiesTable |
| 517 |
Subsidiaries [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInSubsidiariesAxis |
| 518 |
Entity's total for subsidiaries [member] |
Member |
|
|
ifrs-full:EntitysTotalForSubsidiariesMember |
| 519 |
Acindar Industria Argentina de Aceros S.A. |
Member |
|
|
mt:AcindarIndustriaArgentinadeAcerosS.A.Member |
| 520 |
Legal Entity [Axis] |
Axis |
|
|
dei:LegalEntityAxis |
| 521 |
Entity [Domain] |
Member |
|
|
dei:EntityDomain |
| 522 |
Industrias Unicon CA |
Member |
|
|
mt:IndustriasUniconCAMember |
| 523 |
Entity Information [Line Items] |
LineItems |
|
|
dei:EntityInformationLineItems |
| 524 |
Level of price index |
Concept (Pure) |
As Of |
|
ifrs-full:LevelOfPriceIndex |
| 525 |
Gains (losses) on net monetary position |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnNetMonetaryPosition |
| 526 |
Net investment |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InvestmentsInSubsidiaries |
| 527 |
Closing foreign exchange rate (bolivars per USD) |
Concept (Decimal) |
As Of |
|
ifrs-full:ClosingForeignExchangeRate |
| 528 |
2405404 - Disclosure - SCOPE OF CONSOLIDATION - Acquisitions (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidationAcquisitionsDetails |
| 529 |
Disclosure of detailed information about business combination [table] |
Table |
* |
* |
ifrs-full:DisclosureOfBusinessCombinationsTable |
| 530 |
Associates [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInAssociatesAxis |
| 531 |
Entity's total for associates [member] |
Member |
|
|
ifrs-full:EntitysTotalForAssociatesMember |
| 532 |
Baffinland |
Member |
|
|
mt:BaffinlandMember |
| 533 |
Classes of intangible assets other than goodwill [axis] |
Axis |
|
|
ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis |
| 534 |
Intangible assets other than goodwill [member] |
Member |
|
|
ifrs-full:IntangibleAssetsOtherThanGoodwillMember |
| 535 |
Emission rights |
Member |
|
|
mt:EmissionRightsMember |
| 536 |
Joint ventures [axis] |
Axis |
|
|
ifrs-full:JointVenturesAxis |
| 537 |
Entity's total for joint ventures [member] |
Member |
|
|
ifrs-full:EntitysTotalForJointVenturesMember |
| 538 |
Sitrel |
Member |
|
|
mt:SitrelMember |
| 539 |
Business combinations [axis] |
Axis |
|
|
ifrs-full:BusinessCombinationsAxis |
| 540 |
Entity's total for business combinations [member] |
Member |
|
|
ifrs-full:EntitysTotalForBusinessCombinationsMember |
| 541 |
Ilva |
Member |
|
|
mt:IlvaS.p.A.Member |
| 542 |
AMSF |
Member |
|
|
mt:VotorantimSiderurgiaMember |
| 543 |
Ilva and Votorantim |
Member |
|
|
mt:IlvaS.p.A.AndVotorantimSiderurgiaMember |
| 544 |
Electro-Re S.A. |
Member |
|
|
mt:ElectroReS.A.Member |
| 545 |
Sumaré |
Member |
|
|
mt:ArcelorMittalBekaertSumareLtda.Member |
| 546 |
Crédit Agricole Reinsurance S.A. |
Member |
|
|
mt:CrditAgricoleReinsuranceS.A.Member |
| 547 |
Artzare S.A. |
Member |
|
|
mt:ArtzareS.A.Member |
| 548 |
SCEM Reinsurance S.A. |
Member |
|
|
mt:SCEMReinsuranceS.A.Member |
| 549 |
Legal Entity [Axis] |
Axis |
|
|
dei:LegalEntityAxis |
| 550 |
Entity [Domain] |
Member |
|
|
dei:EntityDomain |
| 551 |
AM Investco Italy S.r.l. |
Member |
|
|
mt:AMInvestcoItalyS.r.l.Member |
| 552 |
Disclosure of detailed information about business combination [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfBusinessCombinationsLineItems |
| 553 |
Proportion of ownership interest in subsidiary |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestInSubsidiary |
| 554 |
Proportion of ownership interests held by non-controlling interests |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests |
| 555 |
Consideration transferred, acquisition-date fair value |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred |
| 556 |
Consideration transferred, annual installments payable |
Concept (Monetary) |
As Of |
Credit |
mt:ConsiderationTransferredAnnualInstallmentsPayable |
| 557 |
Leasing costs payable, present value at acquisition date |
Concept (Monetary) |
As Of |
Credit |
mt:ConsiderationTransferredLeasingCostsPayablePresentValueAtAcquisitionDate |
| 558 |
Liabilities incurred |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilitiesIncurred |
| 559 |
Labour agreement employment commitment, number of workers |
Concept (Integer) |
For Period |
|
mt:LabourAgreementEmploymentCommitmentNumberOfWorkers |
| 560 |
Annual installments payable, term (in years) |
Concept (xbrli:durationItemType) |
For Period |
|
mt:ConsiderationTransferredAnnualInstallmentsPayableTerm |
| 561 |
Consideration payable related to put option |
Concept (Monetary) |
As Of |
Credit |
mt:ConsiderationPayableRelatedToPutOptionAcquisitionDateFairValue |
| 562 |
Provisions for environmental remediation obligations |
Concept (Monetary) |
For Period |
Debit |
mt:MeasurementPeriodAdjustmentsRecognizedForEnvironmentalRemediationObligations |
| 563 |
Contingent consideration arrangements and indemnification assets recognised as of acquisition date |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:ContingentConsiderationArrangementsAndIndemnificationAssetsRecognisedAsOfAcquisitionDate |
| 564 |
Trade receivables recognised as of acquisition date |
Concept (Monetary) |
As Of |
Debit |
mt:TradeReceivablesRecognisedAsOfAcquisitionDate |
| 565 |
Gross contractual amounts receivable for acquired receivables |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:GrossContractualAmountsReceivableForAcquiredReceivables |
| 566 |
Best estimate at acquisition date of contractual cash flows not expected to be collected for acquired receivables |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:BestEstimateAtAcquisitionDateOfContractualCashFlowsNotExpectedToBeCollectedForAcquiredReceivables |
| 567 |
Identifiable intangible assets recognised as of acquisition date |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate |
| 568 |
Current liabilities recognised as of acquisition date |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentLiabilitiesRecognisedAsOfAcquisitionDate |
| 569 |
Favorable land lease contracts recognised as of acquisition date |
Concept (Monetary) |
As Of |
Credit |
mt:FavorableLandLeaseContractsRecognisedAsOfAcquisitionDate |
| 570 |
Goodwill/(bargain purchase gain) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainRecognisedInBargainPurchaseTransaction |
| 571 |
Business Combination, Preliminary Working Capital Adjustment |
Concept (Monetary) |
For Period |
Debit |
mt:BusinessCombinationPreliminaryWorkingCapitalAdjustment |
| 572 |
Revenue of acquiree since acquisition date |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueOfAcquiree |
| 573 |
Profit (loss) of acquiree since acquisition date |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossOfAcquiree |
| 574 |
Unfavorable contracts recognised as of acquisition date |
Concept (Monetary) |
As Of |
Credit |
mt:UnfavorableContractsRecognisedAsOfAcquisitionDate |
| 575 |
Revenue of acquiree prior to acquisition date |
Concept (Monetary) |
For Period |
Credit |
mt:RevenueOfAcquireePriorToAcquisitionDateIfConsolidatedAtBeginningOfYear |
| 576 |
Profit (loss) of acquiree prior to acquisition date |
Concept (Monetary) |
For Period |
Credit |
mt:ProfitLossOfAcquireePriorToAcquisitionDateIfConsolidatedAtBeginningOfYear |
| 577 |
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AcquisitionrelatedCostsRecognisedAsExpenseForTransactionRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombination |
| 578 |
Revenue of combined entity as if combination occurred at beginning of period |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueOfCombinedEntity |
| 579 |
Profit (loss) of combined entity as if combination occurred at beginning of period |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossOfCombinedEntity |
| 580 |
Capital commitments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CapitalCommitments |
| 581 |
Industrial capital expenditure commitments, term |
Concept (xbrli:durationItemType) |
For Period |
|
mt:IndustrialCapitalExpenditureCommitmentsTerm |
| 582 |
Capital commitments, period |
Concept (xbrli:durationItemType) |
For Period |
|
mt:CapitalCommitmentsPeriod |
| 583 |
Environmental capital expenditure commitments |
Concept (Monetary) |
As Of |
Credit |
mt:EnvironmentalCapitalExpenditureCommitments |
| 584 |
Proportion of ownership interest in joint venture |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestInJointVenture |
| 585 |
Contingent liabilities recognised as of acquisition date |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ContingentLiabilitiesRecognisedAsOfAcquisitionDate |
| 586 |
Investments in joint ventures |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InvestmentsInJointVentures |
| 587 |
Borrowings recognised as of acquisition date |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:BorrowingsRecognisedAsOfAcquisitionDate |
| 588 |
Cash and cash equivalents recognised as of acquisition date |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate |
| 589 |
Fair value of acquired receivables |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:FairValueOfAcquiredReceivables |
| 590 |
Cash acquired in excess of payments to acquire business |
Concept (Monetary) |
For Period |
Debit |
mt:CashAcquiredinExcessofPaymentstoAcquireBusiness |
| 591 |
Percentage of voting equity interests acquired |
Concept (Percent) |
As Of |
|
ifrs-full:PercentageOfVotingEquityInterestsAcquired |
| 592 |
Cash transferred |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CashTransferred |
| 593 |
Cash acquired from acquisition |
Concept (Monetary) |
For Period |
Debit |
mt:CashAcquiredfromAcquisition |
| 594 |
Cash flows used in obtaining control of subsidiaries or other businesses |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities |
| 595 |
Consideration payable |
Concept (Monetary) |
As Of |
Credit |
mt:ConsiderationPayableAcquisitionDateFairValue |
| 596 |
2405405 - Disclosure - SCOPE OF CONSOLIDATION - Schedule of Assets Acquired and Liabilities Assumed (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidationScheduleOfAssetsAcquiredAndLiabilitiesAssumedDetails |
| 597 |
Disclosure of detailed information about business combination [table] |
Table |
* |
* |
ifrs-full:DisclosureOfBusinessCombinationsTable |
| 598 |
Business combinations [axis] |
Axis |
|
|
ifrs-full:BusinessCombinationsAxis |
| 599 |
Entity's total for business combinations [member] |
Member |
|
|
ifrs-full:EntitysTotalForBusinessCombinationsMember |
| 600 |
AMSF |
Member |
|
|
mt:VotorantimSiderurgiaMember |
| 601 |
Ilva |
Member |
|
|
mt:IlvaS.p.A.Member |
| 602 |
Sumaré |
Member |
|
|
mt:ArcelorMittalBekaertSumareLtda.Member |
| 603 |
Disclosure of detailed information about business combination [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfBusinessCombinationsLineItems |
| 604 |
Current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentAssetsRecognisedAsOfAcquisitionDate |
| 605 |
Property, plant and equipment |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate |
| 606 |
Intangible assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate |
| 607 |
Other non-current assets |
Concept (Monetary) |
As Of |
Debit |
mt:OtherNoncurrentAssetsRecognisedAsOfAcquisitionDate |
| 608 |
Total assets acquired |
Concept (Monetary) |
As Of |
Debit |
mt:IdentifiableAssetsRecognisedAsOfAcquisitionDate |
| 609 |
Deferred tax liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate |
| 610 |
Other liabilities |
Concept (Monetary) |
As Of |
Credit |
mt:OtherLiabilitiesRecognisedAsOfAcquisitionDate |
| 611 |
Total liabilities acquired |
Concept (Monetary) |
As Of |
Credit |
mt:IdentifiableLiabilitiesRecognisedAsOfAcquisitionDate |
| 612 |
Net assets acquired |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed |
| 613 |
Non-controlling interests |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate |
| 614 |
Consideration paid, net |
Concept (Monetary) |
As Of |
Credit |
mt:ConsiderationTransferredNetofCashAcquiredExcludingConsiderationPayable |
| 615 |
Consideration payable |
Concept (Monetary) |
As Of |
Credit |
mt:ConsiderationPayableAcquisitionDateFairValue |
| 616 |
Goodwill recognised as of acquisition date |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:GoodwillRecognisedAsOfAcquisitionDate |
| 617 |
Goodwill/(bargain purchase gain) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainRecognisedInBargainPurchaseTransaction |
| 618 |
2405406 - Disclosure - SCOPE OF CONSOLIDATION - Divestments - Additional Information (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidationDivestmentsAdditionalInformationDetails |
| 619 |
Disclosure of joint ventures [table] |
Table |
* |
* |
ifrs-full:DisclosureOfJointVenturesTable |
| 620 |
Disposal Group Classification [Axis] |
Axis |
|
|
mt:DisposalGroupClassification1Axis |
| 621 |
Disposal Group Classification [Domain] |
Member |
|
|
mt:DisposalGroupClassification1Domain |
| 622 |
Disposal Group, Disposed of by Sale, Not Discontinued Operations |
Member |
|
|
mt:DisposalGroupDisposedofbySaleNotDiscontinuedOperationsMember |
| 623 |
Subsidiaries [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInSubsidiariesAxis |
| 624 |
Entity's total for subsidiaries [member] |
Member |
|
|
ifrs-full:EntitysTotalForSubsidiariesMember |
| 625 |
ArcelorMittal Georgetown Inc. |
Member |
|
|
mt:ArcelorMittalGeorgetownInc.Member |
| 626 |
ArcelorMittal Zaragoza |
Member |
|
|
mt:ArcelorMittalZaragozaMember |
| 627 |
ArcelorMittal Pipes and Tubes Algeria |
Member |
|
|
mt:ArcelorMittalPipesandTubesAlgeriaMember |
| 628 |
Joint ventures [axis] |
Axis |
|
|
ifrs-full:JointVenturesAxis |
| 629 |
Entity's total for joint ventures [member] |
Member |
|
|
ifrs-full:EntitysTotalForJointVenturesMember |
| 630 |
AMTBA |
Member |
|
|
mt:ArcelorMittalTailoredBlanksAmericasMember |
| 631 |
Disposal Group Name [Axis] |
Axis |
|
|
mt:DisposalGroupNameAxis |
| 632 |
Disposal Group Name [Domain] |
Member |
|
|
mt:DisposalGroupNameDomain |
| 633 |
Frýdek Místek |
Member |
|
|
mt:FrydekMistekMember |
| 634 |
Votorantim remedies |
Member |
|
|
mt:VotorantimremediesMember |
| 635 |
Downstream Solutions Europe |
Member |
|
|
mt:ArcelorMittalDownstreamSolutionsMember |
| 636 |
LaPlace and Vinton Long Carbon facilities |
Member |
|
|
mt:LaPlaceAndVintonLongCarbonFacilitiesMember |
| 637 |
Associates [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInAssociatesAxis |
| 638 |
Entity's total for associates [member] |
Member |
|
|
ifrs-full:EntitysTotalForAssociatesMember |
| 639 |
ArcelorMittal Algérie and ArcelorMittal Tebessa |
Member |
|
|
mt:ArcelorMittalAlgrieAndArcelorMittalTebessaMember |
| 640 |
Disclosure of joint ventures [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfJointVenturesLineItems |
| 641 |
Total consideration including receivable |
Concept (Monetary) |
For Period |
Debit |
mt:TotalConsiderationIncludingReceivable |
| 642 |
Cash disposed |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CashAndCashEquivalentsInSubsidiaryOrBusinessesAcquiredOrDisposed2013 |
| 643 |
Portion of consideration receivable consisting of cash and cash equivalents |
Concept (Monetary) |
For Period |
Debit |
mt:PortionOfConsiderationReceivableConsistingOfCashAndCashEquivalents |
| 644 |
Impairment loss |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ImpairmentLoss |
| 645 |
Proportion of ownership interest in subsidiary sold |
Concept (Percent) |
For Period |
|
mt:ProportionOfOwnershipInterestInSubsidiarySold |
| 646 |
Cash consideration |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PortionOfConsiderationPaidReceivedConsistingOfCashAndCashEquivalents |
| 647 |
Gain (loss) on disposal |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnDisposalsOfInvestments |
| 648 |
Joint ventures |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod |
| 649 |
Impairment loss on assets held for sale |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation |
| 650 |
Impairment of goodwill |
Concept (Monetary) |
For Period |
|
ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill |
| 651 |
Proportion of ownership interest in associate sold |
Concept (Percent) |
For Period |
|
mt:ProportionOfOwnershipInterestInAssociateSold |
| 652 |
2405407 - Disclosure - SCOPE OF CONSOLIDATION - Divestments (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidationDivestmentsDetails |
| 653 |
Disclosure Of Non-current Assets Held For Sale And Discontinued Operations [Table] |
Table |
* |
* |
mt:DisclosureOfNoncurrentAssetsHeldForSaleAndDiscontinuedOperationsTable |
| 654 |
Disposal Group Classification [Axis] |
Axis |
|
|
mt:DisposalGroupClassification1Axis |
| 655 |
Disposal Group Classification [Domain] |
Member |
|
|
mt:DisposalGroupClassification1Domain |
| 656 |
Disposal Group, Disposed of by Sale, Not Discontinued Operations |
Member |
|
|
mt:DisposalGroupDisposedofbySaleNotDiscontinuedOperationsMember |
| 657 |
Disposal Group Name [Axis] |
Axis |
|
|
mt:DisposalGroupNameAxis |
| 658 |
Disposal Group Name [Domain] |
Member |
|
|
mt:DisposalGroupNameDomain |
| 659 |
Frýdek Místek |
Member |
|
|
mt:FrydekMistekMember |
| 660 |
Votorantim remedies |
Member |
|
|
mt:VotorantimremediesMember |
| 661 |
AMTBA |
Member |
|
|
mt:ArcelorMittalTailoredBlanksAmericasMember |
| 662 |
Downstream Solutions Europe |
Member |
|
|
mt:ArcelorMittalDownstreamSolutionsMember |
| 663 |
Georgetown |
Member |
|
|
mt:ArcelorMittalGeorgetownInc.Member |
| 664 |
ArcelorMittal Zaragoza |
Member |
|
|
mt:ArcelorMittalZaragozaMember |
| 665 |
ArcelorMittal Tubular Products Algeria |
Member |
|
|
mt:ArcelorMittalTubularProductsAlgeriaMember |
| 666 |
LaPlace and Vinton Long Carbon facilities |
Member |
|
|
mt:LaPlaceAndVintonLongCarbonFacilitiesMember |
| 667 |
Disclosure Of Non-current Assets Held For Sale And Discontinued Operations [Line Items] |
LineItems |
|
|
mt:DisclosureOfNoncurrentAssetsHeldForSaleAndDiscontinuedOperationsLineItems |
| 668 |
Cash and cash equivalents |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalents |
| 669 |
Other current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherCurrentAssets |
| 670 |
Property, plant and equipment |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PropertyPlantAndEquipment |
| 671 |
Other assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherNoncurrentAssets |
| 672 |
Total assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Assets |
| 673 |
Current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentLiabilities |
| 674 |
Other long-term liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherNoncurrentLiabilities |
| 675 |
Total liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Liabilities |
| 676 |
Total net assets/(liabilities) |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NetAssetsLiabilities |
| 677 |
% of net assets sold |
Concept (Percent) |
For Period |
|
mt:PercentOfNetAssetsDisposed |
| 678 |
Total net assets/(liabilities) disposed of |
Concept (Monetary) |
For Period |
Debit |
mt:AssetsLiabilitiesDisposed |
| 679 |
Cash consideration |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PortionOfConsiderationPaidReceivedConsistingOfCashAndCashEquivalents |
| 680 |
Consideration receivable |
Concept (Monetary) |
For Period |
Debit |
mt:PortionOfConsiderationReceivableConsistingOfCashAndCashEquivalents |
| 681 |
Reclassification of foreign exchange translation difference |
Concept (Monetary) |
For Period |
Credit |
mt:ReclassificationOfForeignExchangeTranslationDifference |
| 682 |
Gain (loss) on disposal |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates |
| 683 |
2405408 - Disclosure - SCOPE OF CONSOLIDATION - Assets Held for Sale (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidationAssetsHeldForSaleDetails |
| 684 |
Disclosure Of Non-current Assets Held For Sale And Discontinued Operations [Table] |
Table |
* |
* |
mt:DisclosureOfNoncurrentAssetsHeldForSaleAndDiscontinuedOperationsTable |
| 685 |
Assets and liabilities classified as held for sale [axis] |
Axis |
|
|
ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis |
| 686 |
Assets and liabilities classified as held for sale [member] |
Member |
|
|
ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleMember |
| 687 |
Disposal groups classified as held for sale |
Member |
|
|
ifrs-full:DisposalGroupsClassifiedAsHeldForSaleMember |
| 688 |
Disposal Group Name [Axis] |
Axis |
|
|
mt:DisposalGroupNameAxis |
| 689 |
Disposal Group Name [Domain] |
Member |
|
|
mt:DisposalGroupNameDomain |
| 690 |
Ostrava and Galati Dudelange and Liège divestment package |
Member |
|
|
mt:OstravaAndGalatiDudelangeAndLigeDivestmentPackageMember |
| 691 |
Ilva remedies |
Member |
|
|
mt:IlvaRemediesMember |
| 692 |
Steelton |
Member |
|
|
mt:SteeltonMember |
| 693 |
Frýdek Místek |
Member |
|
|
mt:FrydekMistekMember |
| 694 |
Individual assets or cash-generating units [axis] |
Axis |
|
|
ifrs-full:IndividualAssetsOrCashgeneratingUnitsAxis |
| 695 |
Entity's total for individual assets or cash-generating units [member] |
Member |
|
|
ifrs-full:EntitysTotalForIndividualAssetsOrCashgeneratingUnitsMember |
| 696 |
Ilva remedies |
Member |
|
|
mt:IlvaRemediesMember |
| 697 |
Disclosure Of Non-current Assets Held For Sale And Discontinued Operations [Line Items] |
LineItems |
|
|
mt:DisclosureOfNoncurrentAssetsHeldForSaleAndDiscontinuedOperationsLineItems |
| 698 |
Number of binding offers received |
Concept (Integer) |
For Period |
|
mt:DisposalGroupNumberOfBindingOffersReceived |
| 699 |
Portion of consideration paid (received) consisting of cash and cash equivalents |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PortionOfConsiderationPaidReceivedConsistingOfCashAndCashEquivalents |
| 700 |
Disposal group, deferred consideration |
Concept (Monetary) |
As Of |
Debit |
mt:DisposalGroupIncludingDiscontinuedOperationDeferredConsideration |
| 701 |
Preliminary working capital adjustment |
Concept (Monetary) |
For Period |
Debit |
mt:DisposalGroupIncludingDiscontinuedOperationPreliminaryWorkingCapitalAdjustment |
| 702 |
Impairment loss recognised in profit or loss |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ImpairmentLossRecognisedInProfitOrLoss |
| 703 |
Cash and cash equivalents |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalents |
| 704 |
Trade accounts receivable, prepaid expenses and other current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherCurrentAssets |
| 705 |
Trade accounts receivable and other |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:TradeAndOtherCurrentReceivables |
| 706 |
Inventories |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Inventories |
| 707 |
Total current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentAssets |
| 708 |
Property, plant and equipment |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PropertyPlantAndEquipment |
| 709 |
Financial assets at fair value through other comprehensive income |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherNoncurrentAssets |
| 710 |
Total non-current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentAssets |
| 711 |
Total assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Assets |
| 712 |
Trade accounts payables, accrued expenses and other liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherCurrentLiabilities |
| 713 |
Trade accounts payable and other |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:TradeAndOtherCurrentPayables |
| 714 |
Accrued expenses and other liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentAccruedExpensesAndOtherCurrentLiabilities |
| 715 |
Total current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentLiabilities |
| 716 |
Long-term debt, net of current portion |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LongtermBorrowings |
| 717 |
Other long-term liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherNoncurrentLiabilities |
| 718 |
Long-term provisions |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentProvisions |
| 719 |
Total non-current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentLiabilities |
| 720 |
Total liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Liabilities |
| 721 |
2405409 - Disclosure - SCOPE OF CONSOLIDATION - Investment in Associates and Joint Arrangements (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidationInvestmentInAssociatesAndJointArrangementsDetails |
| 722 |
Implied Table |
Table |
* |
* |
implied:Table |
| 723 |
Basis Of Consolidation [Abstract] |
Abstract |
|
|
mt:BasisOfConsolidationAbstract |
| 724 |
Joint ventures |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod |
| 725 |
Associates |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod |
| 726 |
Individually immaterial joint ventures and associates |
Concept (Monetary) |
As Of |
Debit |
mt:InvestmentsAccountedForUsingEquityMethodIndividuallyImmaterialJointVenturesAndAssociates |
| 727 |
Total |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InvestmentAccountedForUsingEquityMethod |
| 728 |
Threshold aggregate of individually immaterial joint ventures and associates |
Concept (Percent) |
As Of |
|
mt:ThresholdAggregateOfIndividuallyImmaterialJointVenturesAndAssociates |
| 729 |
Threshold carrying amount of individually immaterial joint ventures and associates |
Concept (Monetary) |
As Of |
Debit |
mt:ThresholdCarryingAmountOfIndividuallyImmaterialJointVenturesAndAssociates |
| 730 |
2405410 - Disclosure - SCOPE OF CONSOLIDATION - Joint Ventures (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidationJointVenturesDetails |
| 731 |
Disclosure of joint ventures [table] |
Table |
* |
* |
ifrs-full:DisclosureOfJointVenturesTable |
| 732 |
Disposal Group Classification [Axis] |
Axis |
|
|
mt:DisposalGroupClassification1Axis |
| 733 |
Disposal Group Classification [Domain] |
Member |
|
|
mt:DisposalGroupClassification1Domain |
| 734 |
Disposal Group, Disposed of by Sale, Not Discontinued Operations |
Member |
|
|
mt:DisposalGroupDisposedofbySaleNotDiscontinuedOperationsMember |
| 735 |
Joint ventures [axis] |
Axis |
|
|
ifrs-full:JointVenturesAxis |
| 736 |
Entity's total for joint ventures [member] |
Member |
|
|
ifrs-full:EntitysTotalForJointVenturesMember |
| 737 |
Joint ventures |
Member |
|
|
ifrs-full:JointVenturesMember |
| 738 |
Calvert |
Member |
|
|
mt:CalvertMember |
| 739 |
VAMA |
Member |
|
|
mt:ValinArcelorMittalAutomotiveSteelMember |
| 740 |
Tameh |
Member |
|
|
mt:TamehMember |
| 741 |
Borçelik |
Member |
|
|
mt:BorcelikCelikSanayiiTicaretAnonimSirketiMember |
| 742 |
Macsteel |
Member |
|
|
mt:MacsteelMember |
| 743 |
Baffinland |
Member |
|
|
mt:BaffinlandMember |
| 744 |
Disclosure of joint ventures [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfJointVenturesLineItems |
| 745 |
Proportion of ownership interest in joint venture |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestInJointVenture |
| 746 |
Proportion of voting rights held in joint venture |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfVotingRightsHeldInJointVenture |
| 747 |
Current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentAssets |
| 748 |
Cash and cash equivalents |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalents |
| 749 |
Non-current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentAssets |
| 750 |
Current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentLiabilities |
| 751 |
Trade and other payables and provisions, current |
Concept (Monetary) |
As Of |
Credit |
mt:TradeAndOtherPayableAndProvisionsCurrent |
| 752 |
Non-current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentLiabilities |
| 753 |
Trade and other payables and provisions, non-current |
Concept (Monetary) |
As Of |
Credit |
mt:TradeAndOtherPayableAndProvisionsNoncurrent |
| 754 |
Total net assets/(liabilities) |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NetAssetsLiabilities |
| 755 |
Company's share of net assets |
Concept (Monetary) |
As Of |
Debit |
mt:ShareOfNetAssetsLiabilities |
| 756 |
Adjustments for differences in accounting policies and other |
Concept (Monetary) |
As Of |
Debit |
mt:InvestmentsInJointVenturesAdjustmentsForDifferencesInAccountingPoliciesAndOthers |
| 757 |
Carrying amount in the statements of financial position |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod |
| 758 |
Revenue |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromContractsWithCustomers |
| 759 |
Depreciation and amortization |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:DepreciationAndAmortisationExpense |
| 760 |
Interest income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromInterest |
| 761 |
Interest expense |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:InterestExpense |
| 762 |
Income tax benefit (expense) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncomeTaxExpenseContinuingOperations |
| 763 |
Profit or loss from continuing operations |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLoss |
| 764 |
Other comprehensive income (loss) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherComprehensiveIncome |
| 765 |
Total comprehensive income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ComprehensiveIncome |
| 766 |
Cash dividends received by the Company |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:DividendsReceived |
| 767 |
Deferred tax liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DeferredTaxLiabilities |
| 768 |
Proportion of ownership in joint venture, based on shares issued |
Concept (Percent) |
For Period |
|
mt:ProportionOfOwnershipInterestInJointVentureBasedOnSharesIssued |
| 769 |
Proportion of ownership in joint venture, based on outstanding shares |
Concept (Percent) |
For Period |
|
mt:ProportionOfOwnershipInterestInJointVentureBasedOnOutstandingShares |
| 770 |
Impairment charges |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ImpairmentLossOnFinancialAssets |
| 771 |
Accumulated foreign exchange translation gains (losses) recognized in earnings due to decrease in ownership interest in investment |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ReclassificationAdjustmentsOnExchangeDifferencesOnTranslationBeforeTax |
| 772 |
Purchase agreement amount of tonnes |
Concept (num:massItemType) |
For Period |
|
mt:PurchaseAgreementAmount |
| 773 |
Purchase agreement, option to extend term |
Concept (xbrli:durationItemType) |
For Period |
|
mt:PurchaseAgreementOptionExtendedTerm |
| 774 |
Purchase agreement term |
Concept (xbrli:durationItemType) |
For Period |
|
mt:PurchaseAgreementTerm |
| 775 |
2405411 - Disclosure - SCOPE OF CONSOLIDATION - Associates (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidationAssociatesDetails |
| 776 |
Disclosure of associates [table] |
Table |
* |
* |
ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable |
| 777 |
Associates [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInAssociatesAxis |
| 778 |
Entity's total for associates [member] |
Member |
|
|
ifrs-full:EntitysTotalForAssociatesMember |
| 779 |
Associate |
Member |
|
|
ifrs-full:AssociatesMember |
| 780 |
China Oriental |
Member |
|
|
mt:ChinaOrientalGroupCompanyLimitedMember |
| 781 |
DHS Group |
Member |
|
|
mt:DHSGroupDomain |
| 782 |
Gonvarri Steel Industries |
Member |
|
|
mt:GonvarriSteelIndustriesMember |
| 783 |
Baffinland |
Member |
|
|
mt:BaffinlandMember |
| 784 |
Gestamp |
Member |
|
|
mt:GestampAutomocinMember |
| 785 |
Disclosure of associates [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems |
| 786 |
Proportion of ownership interest in associate |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestInAssociate |
| 787 |
Proportion of voting rights held in associate |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfVotingPowerHeldInAssociate |
| 788 |
Current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentAssets |
| 789 |
Non-current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentAssets |
| 790 |
Current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentLiabilities |
| 791 |
Non-current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentLiabilities |
| 792 |
Non-controlling interests |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncontrollingInterests |
| 793 |
Net assets attributable to equity holders of the parent |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:EquityAttributableToOwnersOfParent |
| 794 |
Company's share of net assets |
Concept (Monetary) |
As Of |
Debit |
mt:ShareOfNetAssetsLiabilities |
| 795 |
Adjustments for differences in accounting policies and other |
Concept (Monetary) |
As Of |
Debit |
mt:InvestmentsinAssociatesAdjustmentsForDifferencesInAccountingPoliciesAndOthers |
| 796 |
Other adjustments |
Concept (Monetary) |
As Of |
Debit |
mt:InvestmentsinAssociatesOtherAdjustments |
| 797 |
Carrying amount in the statements of financial position |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod |
| 798 |
Revenue |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromContractsWithCustomers |
| 799 |
Profit or loss from continuing operations |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLoss |
| 800 |
Other comprehensive income (loss) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherComprehensiveIncome |
| 801 |
Total comprehensive income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ComprehensiveIncome |
| 802 |
Cash dividends received by the Company |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:DividendsReceived |
| 803 |
Proportion of ownership interest in associate sold |
Concept (Percent) |
For Period |
|
mt:ProportionOfOwnershipInterestInAssociateSold |
| 804 |
Interest in associate sold subject to put option, exercised by co-investee |
Concept (Percent) |
For Period |
|
mt:ProportionOfOwnershipInterestInAssociateSoldSubjectToPutOptionExercisedByCoInvestee |
| 805 |
Decrease of accrued expenses and other liabilities |
Concept (Monetary) |
For Period |
Debit |
mt:AdjustmentsForIncreaseDecreaseinAccruedExpenseAndOtherLiabilities |
| 806 |
Decrease of prepaid expenses and other current assets |
Concept (Monetary) |
For Period |
Credit |
mt:AdjustmentsForIncreaseDecreaseInPrepaidExpensesAndOtherCurrentAssets |
| 807 |
Increase (decrease) in number of shares outstanding (in shares) |
Concept (Shares) |
For Period |
|
ifrs-full:IncreaseDecreaseInNumberOfSharesOutstanding |
| 808 |
Net gain (loss) on disposal of subsidiaries |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates |
| 809 |
Accumulated foreign exchange translation gains (losses) recognized in earnings due to decrease in ownership interest in investment |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ReclassificationAdjustmentsOnExchangeDifferencesOnTranslationBeforeTax |
| 810 |
2405412 - Disclosure - SCOPE OF CONSOLIDATION - Other Associates and Joint Ventures that are not Individually Material (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidationOtherAssociatesAndJointVenturesThatAreNotIndividuallyMaterialDetails |
| 811 |
Disclosure of transactions between related parties [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable |
| 812 |
Associates [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInAssociatesAxis |
| 813 |
Entity's total for associates [member] |
Member |
|
|
ifrs-full:EntitysTotalForAssociatesMember |
| 814 |
Aggregated individually immaterial associates |
Member |
|
|
ifrs-full:AggregatedIndividuallyImmaterialAssociatesMember |
| 815 |
Joint ventures [axis] |
Axis |
|
|
ifrs-full:JointVenturesAxis |
| 816 |
Entity's total for joint ventures [member] |
Member |
|
|
ifrs-full:EntitysTotalForJointVenturesMember |
| 817 |
Aggregated individually immaterial joint ventures |
Member |
|
|
ifrs-full:AggregatedIndividuallyImmaterialJointVenturesMember |
| 818 |
Al Jubail |
Member |
|
|
mt:ArcelorMittalTubularProductsJubailMember |
| 819 |
Counterparties [axis] |
Axis |
|
|
ifrs-full:CounterpartiesAxis |
| 820 |
Counterparties [member] |
Member |
|
|
ifrs-full:CounterpartiesMember |
| 821 |
Al Jubail |
Member |
|
|
mt:ArcelorMittalTubularProductsJubailMember |
| 822 |
Categories of related parties [axis] |
Axis |
|
|
ifrs-full:CategoriesOfRelatedPartiesAxis |
| 823 |
Entity's total for related parties [member] |
Member |
|
|
ifrs-full:EntitysTotalForRelatedPartiesMember |
| 824 |
Joint Venture |
Member |
|
|
ifrs-full:JointVenturesWhereEntityIsVenturerMember |
| 825 |
Disclosure of transactions between related parties [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems |
| 826 |
Associates |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InvestmentsInAssociatesAccountedForUsingEquityMethod |
| 827 |
Joint ventures |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InvestmentsInJointVenturesAccountedForUsingEquityMethod |
| 828 |
Investments in associates and joint ventures |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InvestmentAccountedForUsingEquityMethod |
| 829 |
Income (loss) from continuing operations |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ShareOfProfitLossOfContinuingOperationsOfAssociatesAndJointVenturesAccountedForUsingEquityMethod |
| 830 |
Other comprehensive income (loss) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod |
| 831 |
Total comprehensive income (loss) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ShareOfTotalComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethod |
| 832 |
Proportion of ownership interest in joint venture |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestInJointVenture |
| 833 |
Cash advances and loans made to related parties, nominal value |
Concept (Monetary) |
As Of |
Credit |
mt:CashAndAdvancesAndLoansMadeToRelatedPartiesNominalValue |
| 834 |
Loss recognized against the shareholder loans |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod |
| 835 |
Loan receivable |
Concept (Monetary) |
As Of |
Debit |
mt:LoansReceivableRelatedParty |
| 836 |
2405413 - Disclosure - SCOPE OF CONSOLIDATION - Impairment of Associates and Joint Ventures (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidationImpairmentOfAssociatesAndJointVenturesDetails |
| 837 |
Disclosure of impairment loss and reversal of impairment loss [table] |
Table |
* |
* |
ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossTable |
| 838 |
Associates [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInAssociatesAxis |
| 839 |
Entity's total for associates [member] |
Member |
|
|
ifrs-full:EntitysTotalForAssociatesMember |
| 840 |
Comvex |
Member |
|
|
mt:ComvexMember |
| 841 |
Joint ventures [axis] |
Axis |
|
|
ifrs-full:JointVenturesAxis |
| 842 |
Entity's total for joint ventures [member] |
Member |
|
|
ifrs-full:EntitysTotalForJointVenturesMember |
| 843 |
Kalagadi Manganese (Propriety) Ltd |
Member |
|
|
mt:KalagadiManganeseProprietaryLimitedMember |
| 844 |
Classes of assets [axis] |
Axis |
|
|
ifrs-full:ClassesOfAssetsAxis |
| 845 |
Assets [member] |
Member |
|
|
ifrs-full:ClassesOfAssetsMember |
| 846 |
Loans and receivables |
Member |
|
|
ifrs-full:LoansAndReceivablesCategoryMember |
| 847 |
Investments accounted for using equity method |
Member |
|
|
ifrs-full:InvestmentsAccountedForUsingEquityMethodMember |
| 848 |
Disclosure of impairment loss and reversal of impairment loss [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossLineItems |
| 849 |
Impairment charges |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ImpairmentLossOnFinancialAssets |
| 850 |
Proportion of ownership interest in joint venture sold |
Concept (Percent) |
For Period |
|
mt:ProportionOfOwnershipInterestInJointVentureSold |
| 851 |
Proportion of ownership interest in associate |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestInAssociate |
| 852 |
Cumulative unrecognised share of losses of joint ventures |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CumulativeUnrecognisedShareOfLossesOfJointVentures |
| 853 |
2405414 - Disclosure - SCOPE OF CONSOLIDATION - Investments in Joint Operations (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidationInvestmentsInJointOperationsDetails |
| 854 |
Disclosure of joint operations [table] |
Table |
* |
* |
ifrs-full:DisclosureOfJointOperationsTable |
| 855 |
Joint operations [axis] |
Axis |
|
|
ifrs-full:JointOperationsAxis |
| 856 |
Entity's total for joint operations [member] |
Member |
|
|
ifrs-full:EntitysTotalForJointOperationsMember |
| 857 |
Peña Colorada |
Member |
|
|
mt:PeaColoradaMember |
| 858 |
Hibbing Taconite Mines |
Member |
|
|
mt:HibbingTaconiteMinesMember |
| 859 |
I/N Tek |
Member |
|
|
mt:INTekMember |
| 860 |
Double G Coating |
Member |
|
|
mt:DoubleGCoatingMember |
| 861 |
Disclosure of joint operations [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfJointOperationsLineItems |
| 862 |
Proportion of ownership interest in joint operation |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestInJointOperation |
| 863 |
2405415 - Disclosure - SCOPE OF CONSOLIDATION - Other Investments (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidationOtherInvestmentsDetails |
| 864 |
Disclosure of financial assets [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialAssetsTable |
| 865 |
Classes of financial instruments [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialInstrumentsAxis |
| 866 |
Financial instruments, class [member] |
Member |
|
|
ifrs-full:ClassesOfFinancialInstrumentsMember |
| 867 |
Other investments |
Member |
|
|
mt:OtherInvestments1Member |
| 868 |
Investment Issuer [Axis] |
Axis |
|
|
invest:InvestmentIssuerAxis |
| 869 |
Investment Issuer [Domain] |
Member |
|
|
invest:InvestmentIssuerDomain |
| 870 |
Erdemir |
Member |
|
|
mt:EregliDemirveCelikFabrikalariT.A.S.Member |
| 871 |
Stalprodukt S.A. |
Member |
|
|
mt:StalproduktSAMember |
| 872 |
Gerdau |
Member |
|
|
mt:GerdauMember |
| 873 |
Other investments |
Member |
|
|
mt:OtherInvestmentIssuersMember |
| 874 |
Categories of financial assets [axis] |
Axis |
|
|
ifrs-full:CategoriesOfFinancialAssetsAxis |
| 875 |
Financial assets, category [member] |
Member |
|
|
ifrs-full:FinancialAssetsCategoryMember |
| 876 |
Investments in equity instruments at FVOCI |
Member |
|
|
ifrs-full:InvestmentsInEquityInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember |
| 877 |
Financial assets available-for-sale, category |
Member |
|
|
ifrs-full:FinancialAssetsAvailableforsaleCategoryMember |
| 878 |
Associates [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInAssociatesAxis |
| 879 |
Entity's total for associates [member] |
Member |
|
|
ifrs-full:EntitysTotalForAssociatesMember |
| 880 |
Stalprodukt S.A. |
Member |
|
|
mt:StalproduktSAMember |
| 881 |
Disclosure of financial assets [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialAssetsLineItems |
| 882 |
Investments in equity instruments at FVOCI |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:FairValueOfInvestmentsInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncome |
| 883 |
Available-for-sale securities (at fair value) |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:FinancialAssetsAvailableforsale |
| 884 |
Investments in equity instruments at cost |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:FinancialAssetsAtAmortisedCost |
| 885 |
Financial assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:FinancialAssets |
| 886 |
Unrealized gains (losses) recognized in OCI |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeBeforeTax |
| 887 |
Ownership interest in associate sold (in shares) |
Concept (Shares) |
For Period |
|
mt:ProportionOfOwnershipInterestInAssociateSoldShares |
| 888 |
Proceeds from sales of interests in associates |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromSalesOfInterestsInAssociates |
| 889 |
Proportion of ownership interest in associate |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestInAssociate |
| 890 |
Proportion of ownership interest in equity investment |
Concept (Percent) |
For Period |
|
mt:ProportionOfOwnershipInterestInEquityInvestment |
| 891 |
Proportion of voting rights held in associate |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfVotingPowerHeldInAssociate |
| 892 |
Proportion of voting rights held in equity investment |
Concept (Percent) |
For Period |
|
mt:ProportionOfVotingRightsHeldInEquityInvestment |
| 893 |
2405416 - Disclosure - SCOPE OF CONSOLIDATION - Other Investments - Unconsolidated Structured Entities (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidationOtherInvestmentsUnconsolidatedStructuredEntitiesDetails |
| 894 |
Disclosure of unconsolidated structured entities [table] |
Table |
* |
* |
ifrs-full:DisclosureOfUnconsolidatedStructuredEntitiesTable |
| 895 |
Unconsolidated structured entities [axis] |
Axis |
|
|
ifrs-full:UnconsolidatedStructuredEntitiesAxis |
| 896 |
Entity's total for unconsolidated structured entities [member] |
Member |
|
|
ifrs-full:EntitysTotalForUnconsolidatedStructuredEntitiesMember |
| 897 |
Unconsolidated structured entities |
Member |
|
|
ifrs-full:UnconsolidatedStructuredEntitiesMember |
| 898 |
Vessels Subject to Operating Lease by Vessel [Axis] |
Axis |
|
|
mt:VesselsSubjecttoOperatingLeasebyVesselAxis |
| 899 |
Vessels Subject to Operating Lease by Vessel [Domain] |
Member |
|
|
mt:VesselsSubjecttoOperatingLeasebyVesselDomain |
| 900 |
First vessel |
Member |
|
|
mt:VesselsSubjecttoOperatingLeaseVesselOneMember |
| 901 |
Second vessel |
Member |
|
|
mt:VesselsSubjecttoOperatingLeaseVesselTwoMember |
| 902 |
Call Options' Strike Price by Maturity [Axis] |
Axis |
|
|
mt:CallOptionsStrikePricebyMaturityAxis |
| 903 |
Call Options' Strike Price by Maturity [Domain] |
Member |
|
|
mt:CallOptionsStrikePricebyMaturityDomain |
| 904 |
at the 60th month |
Member |
|
|
mt:CallOptionsStrikePricebyMaturityMaturityPeriodOneMember |
| 905 |
at the 72nd month |
Member |
|
|
mt:CallOptionsStrikePricebyMaturityMaturityPeriodTwoMember |
| 906 |
at the 84th month |
Member |
|
|
mt:CallOptionsStrikePricebyMaturityMaturityPeriodThreeMember |
| 907 |
at the 96th month |
Member |
|
|
mt:CallOptionsStrikePricebyMaturityMaturityPeriodFourMember |
| 908 |
at the 108th month |
Member |
|
|
mt:CallOptionsStrikePricebyMaturityMaturityPeriodFiveMember |
| 909 |
at the 120th month |
Member |
|
|
mt:CallOptionsStrikePricebyMaturityMaturityPeriodSixMember |
| 910 |
at the 132nd month |
Member |
|
|
mt:CallOptionsStrikePricebyMaturityMaturityPeriodSevenMember |
| 911 |
at the 144th month |
Member |
|
|
mt:CallOptionsStrikePricebyMaturityMaturityPeriodEightMember |
| 912 |
Disclosure of unconsolidated structured entities [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfUnconsolidatedStructuredEntitiesLineItems |
| 913 |
Number of vessels under operating leases |
Concept (Integer) |
For Period |
|
mt:NumberVesselsUnderOperatingLeasesFromUnconsolidatedStructuredEntities |
| 914 |
Operating lease, term of contract |
Concept (xbrli:durationItemType) |
For Period |
|
mt:LesseeOperatingLeaseTermofContract |
| 915 |
Operating lease, expense per vessel |
Concept (Monetary) |
For Period |
Debit |
mt:OperatingLeaseExpensePerVessel |
| 916 |
Operating lease, option to purchase, consideration |
Concept (Monetary) |
For Period |
Credit |
mt:LesseeOperatingLeaseOptionToPurchaseConsideration |
| 917 |
Call options' strike prices |
Concept (Decimal) |
As Of |
|
mt:LesseeOperatingLeaseCallOptionStrikePrice |
| 918 |
Percentage of gains to be shared with structured entities |
Concept (Percent) |
For Period |
|
mt:LesseeOperatingLeaseGainToBeSharedWithLessorOnCallOptionPercentage |
| 919 |
Receivables due from related parties |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:TradeAndOtherReceivablesDueFromRelatedParties |
| 920 |
2405417 - Disclosure - SCOPE OF CONSOLIDATION - Income (Loss) from Investments in Associates, Joint Ventures and Other Investments (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ScopeOfConsolidationIncomeLossFromInvestmentsInAssociatesJointVenturesAndOtherInvestmentsDetails |
| 921 |
Disclosure of financial assets [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialAssetsTable |
| 922 |
Disposal Group Classification [Axis] |
Axis |
|
|
mt:DisposalGroupClassification1Axis |
| 923 |
Disposal Group Classification [Domain] |
Member |
|
|
mt:DisposalGroupClassification1Domain |
| 924 |
Disposal Group, Disposed of by Sale, Not Discontinued Operations |
Member |
|
|
mt:DisposalGroupDisposedofbySaleNotDiscontinuedOperationsMember |
| 925 |
Categories of related parties [axis] |
Axis |
|
|
ifrs-full:CategoriesOfRelatedPartiesAxis |
| 926 |
Entity's total for related parties [member] |
Member |
|
|
ifrs-full:EntitysTotalForRelatedPartiesMember |
| 927 |
Associates |
Member |
|
|
ifrs-full:AssociatesMember |
| 928 |
Joint ventures |
Member |
|
|
ifrs-full:JointVenturesMember |
| 929 |
Classes of assets [axis] |
Axis |
|
|
ifrs-full:ClassesOfAssetsAxis |
| 930 |
Assets [member] |
Member |
|
|
ifrs-full:ClassesOfAssetsMember |
| 931 |
Loans and receivables |
Member |
|
|
ifrs-full:LoansAndReceivablesCategoryMember |
| 932 |
Investments accounted for using equity method |
Member |
|
|
ifrs-full:InvestmentsAccountedForUsingEquityMethodMember |
| 933 |
Joint ventures [axis] |
Axis |
|
|
ifrs-full:JointVenturesAxis |
| 934 |
Entity's total for joint ventures [member] |
Member |
|
|
ifrs-full:EntitysTotalForJointVenturesMember |
| 935 |
Macsteel |
Member |
|
|
mt:MacsteelMember |
| 936 |
Kalagadi Manganese (Propriety) Ltd |
Member |
|
|
mt:KalagadiManganeseProprietaryLimitedMember |
| 937 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 938 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 939 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 940 |
Associates [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInAssociatesAxis |
| 941 |
Entity's total for associates [member] |
Member |
|
|
ifrs-full:EntitysTotalForAssociatesMember |
| 942 |
Comvex |
Member |
|
|
mt:ComvexMember |
| 943 |
China Oriental |
Member |
|
|
mt:ChinaOrientalGroupCompanyLimitedMember |
| 944 |
Baffinland |
Member |
|
|
mt:BaffinlandMember |
| 945 |
Gestamp |
Member |
|
|
mt:GestampAutomocinMember |
| 946 |
Stalprodukt S.A. |
Member |
|
|
mt:StalproduktSAMember |
| 947 |
Investment Issuer [Axis] |
Axis |
|
|
invest:InvestmentIssuerAxis |
| 948 |
Investment Issuer [Domain] |
Member |
|
|
invest:InvestmentIssuerDomain |
| 949 |
EIMP |
Member |
|
|
mt:EmpireIronMiningPartnershipMember |
| 950 |
Hunan Valin |
Member |
|
|
mt:HunanValinMember |
| 951 |
Disclosure of financial assets [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialAssetsLineItems |
| 952 |
Share in net earnings of equity-accounted companies |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod |
| 953 |
Impairment charges |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ImpairmentLossOnFinancialAssets |
| 954 |
Gain (loss) on disposal |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnDisposalsOfInvestments |
| 955 |
Dividend income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromDividends |
| 956 |
Total |
Concept (Monetary) |
For Period |
Credit |
mt:IncomeLossOfAssociatesJointVenturesAndOtherInvestments |
| 957 |
Impairment charges |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ImpairmentLossOnFinancialAssets |
| 958 |
Gain (loss) on disposal |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates |
| 959 |
Proportion of ownership interest in associate |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestInAssociate |
| 960 |
Increase (decrease) in number of shares outstanding (in shares) |
Concept (Shares) |
For Period |
|
ifrs-full:IncreaseDecreaseInNumberOfSharesOutstanding |
| 961 |
Proceeds from sales of investments other than investments accounted for using equity method |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromSalesOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod |
| 962 |
Ownership interest in equity investment sold |
Concept (Percent) |
For Period |
|
mt:ProportionOfOwnershipInterestInEquityInvestmentSold |
| 963 |
Proportion of ownership interest in joint venture sold |
Concept (Percent) |
For Period |
|
mt:ProportionOfOwnershipInterestInJointVentureSold |
| 964 |
Disposal group, consideration |
Concept (Monetary) |
As Of |
Debit |
mt:DisposalGroupIncludingDiscontinuedOperationConsideration1 |
| 965 |
Proceeds from disposal of available-for-sale financial assets |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromDisposalOrMaturityOfAvailableforsaleFinancialAssets |
| 966 |
2407402 - Disclosure - SEGMENT REPORTING - Reportable Segments (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/SegmentReportingReportableSegmentsDetails |
| 967 |
Disclosure of operating segments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfOperatingSegmentsTable |
| 968 |
Segment consolidation items [axis] |
Axis |
|
|
ifrs-full:SegmentConsolidationItemsAxis |
| 969 |
Entity's total for segment consolidation items [member] |
Member |
|
|
ifrs-full:EntitysTotalForSegmentConsolidationItemsMember |
| 970 |
Operating segments |
Member |
|
|
ifrs-full:OperatingSegmentsMember |
| 971 |
Other and Intersegment sales |
Member |
|
|
mt:UnallocatedAmountsAndEliminationOfIntersegmentAmountsMember |
| 972 |
Intersegment sales |
Member |
|
|
ifrs-full:EliminationOfIntersegmentAmountsMember |
| 973 |
Other |
Member |
|
|
ifrs-full:UnallocatedAmountsMember |
| 974 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 975 |
Segments [member] |
Member |
|
|
ifrs-full:SegmentsMember |
| 976 |
NAFTA |
Member |
|
|
mt:NAFTAMember |
| 977 |
Brazil |
Member |
|
|
mt:BrazilSegmentMember |
| 978 |
Europe |
Member |
|
|
mt:EuropeSegmentMember |
| 979 |
ACIS |
Member |
|
|
mt:ACISMember |
| 980 |
Mining |
Member |
|
|
mt:MiningMember |
| 981 |
Disclosure of operating segments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfOperatingSegmentsLineItems |
| 982 |
Number of operating segments |
Concept (Integer) |
For Period |
|
mt:NumberOfOperatingSegments1 |
| 983 |
Number of reportable segments |
Concept (Integer) |
For Period |
|
mt:NumberOfReportableSegments1 |
| 984 |
Disclosure of operating segments [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfOperatingSegmentsAbstract |
| 985 |
Sales to external customers |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromContractsWithCustomers |
| 986 |
Intersegment sales |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:Revenue |
| 987 |
Operating income (loss) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossFromOperatingActivities |
| 988 |
Depreciation and amortization |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:DepreciationAndAmortisationExpense |
| 989 |
Bargain purchase gain |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainRecognisedInBargainPurchaseTransaction |
| 990 |
Impairment |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ImpairmentLoss |
| 991 |
Capital expenditures |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PurchaseOfPropertyPlantAndEquipmentIntangibleAssetsOtherThanGoodwillInvestmentPropertyAndOtherNoncurrentAssets |
| 992 |
Reconciliation From Operating Income [Abstract] |
Abstract |
|
|
mt:ReconciliationFromOperatingIncomeLossToNetIncomeAbstract |
| 993 |
Operating income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossFromOperatingActivities |
| 994 |
Income from investments in associates and joint ventures |
Concept (Monetary) |
For Period |
Credit |
mt:IncomeLossOfAssociatesJointVenturesAndOtherInvestments |
| 995 |
Financing costs - net |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:FinanceIncomeCost |
| 996 |
Income before taxes |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossBeforeTax |
| 997 |
Income tax (benefit) / expense |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncomeTaxExpenseContinuingOperations |
| 998 |
Net income (including non-controlling interests) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLoss |
| 999 |
2407403 - Disclosure - SEGMENT REPORTING - Sales by Geographical Area (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/SegmentReportingSalesByGeographicalAreaDetails |
| 1000 |
Disclosure of geographical areas [table] |
Table |
* |
* |
ifrs-full:DisclosureOfGeographicalAreasTable |
| 1001 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 1002 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 1003 |
Total Americas |
Member |
|
|
srt:AmericasMember |
| 1004 |
United States |
Member |
|
|
country:US |
| 1005 |
Brazil |
Member |
|
|
country:BR |
| 1006 |
Canada |
Member |
|
|
country:CA |
| 1007 |
Mexico |
Member |
|
|
country:MX |
| 1008 |
Argentina |
Member |
|
|
country:AR |
| 1009 |
Others |
Member |
|
|
mt:OtherAmericasMember |
| 1010 |
Total Europe |
Member |
|
|
srt:EuropeMember |
| 1011 |
Germany |
Member |
|
|
country:DE |
| 1012 |
Poland |
Member |
|
|
country:PL |
| 1013 |
France |
Member |
|
|
country:FR |
| 1014 |
Spain |
Member |
|
|
country:ES |
| 1015 |
Italy |
Member |
|
|
country:IT |
| 1016 |
Czech Republic |
Member |
|
|
country:CZ |
| 1017 |
Turkey |
Member |
|
|
country:TR |
| 1018 |
United Kingdom |
Member |
|
|
country:GB |
| 1019 |
Belgium |
Member |
|
|
country:BE |
| 1020 |
Netherlands |
Member |
|
|
country:NL |
| 1021 |
Russia |
Member |
|
|
country:RU |
| 1022 |
Romania |
Member |
|
|
country:RO |
| 1023 |
Others |
Member |
|
|
mt:OtherEuropeMember |
| 1024 |
Total Asia & Africa |
Member |
|
|
mt:AsiaandAfricaMember |
| 1025 |
South Africa |
Member |
|
|
country:ZA |
| 1026 |
Morocco |
Member |
|
|
country:MA |
| 1027 |
Egypt |
Member |
|
|
country:EG |
| 1028 |
Rest of Africa |
Member |
|
|
mt:RestofAfricaMember |
| 1029 |
China |
Member |
|
|
country:CN |
| 1030 |
Kazakhstan |
Member |
|
|
country:KZ |
| 1031 |
South Korea |
Member |
|
|
country:KR |
| 1032 |
India |
Member |
|
|
country:IN |
| 1033 |
Rest of Asia |
Member |
|
|
mt:RestofAsiaMember |
| 1034 |
Luxembourg |
Member |
|
|
country:LU |
| 1035 |
Disclosure of geographical areas [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfGeographicalAreasLineItems |
| 1036 |
Sales |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromContractsWithCustomers |
| 1037 |
2407404 - Disclosure - SEGMENT REPORTING - Non-Current Assets by Geographical Area (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/SegmentReportingNonCurrentAssetsByGeographicalAreaDetails |
| 1038 |
Disclosure of geographical areas [table] |
Table |
* |
* |
ifrs-full:DisclosureOfGeographicalAreasTable |
| 1039 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 1040 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 1041 |
Total Americas |
Member |
|
|
srt:AmericasMember |
| 1042 |
Canada |
Member |
|
|
country:CA |
| 1043 |
Brazil |
Member |
|
|
country:BR |
| 1044 |
United States |
Member |
|
|
country:US |
| 1045 |
Mexico |
Member |
|
|
country:MX |
| 1046 |
Argentina |
Member |
|
|
country:AR |
| 1047 |
Venezuela |
Member |
|
|
country:VE |
| 1048 |
Others |
Member |
|
|
mt:OtherAmericasMember |
| 1049 |
Total Europe |
Member |
|
|
srt:EuropeMember |
| 1050 |
France |
Member |
|
|
country:FR |
| 1051 |
Germany |
Member |
|
|
country:DE |
| 1052 |
Belgium |
Member |
|
|
country:BE |
| 1053 |
Poland |
Member |
|
|
country:PL |
| 1054 |
Ukraine |
Member |
|
|
country:UA |
| 1055 |
Spain |
Member |
|
|
country:ES |
| 1056 |
Italy |
Member |
|
|
country:IT |
| 1057 |
Luxembourg |
Member |
|
|
country:LU |
| 1058 |
Bosnia and Herzegovina |
Member |
|
|
country:BA |
| 1059 |
Romania |
Member |
|
|
country:RO |
| 1060 |
Czech Republic |
Member |
|
|
country:CZ |
| 1061 |
Others |
Member |
|
|
mt:OtherEuropeMember |
| 1062 |
Total Asia & Africa |
Member |
|
|
mt:AsiaandAfricaMember |
| 1063 |
Kazakhstan |
Member |
|
|
country:KZ |
| 1064 |
South Africa |
Member |
|
|
country:ZA |
| 1065 |
Liberia |
Member |
|
|
country:LR |
| 1066 |
Morocco |
Member |
|
|
country:MA |
| 1067 |
Others |
Member |
|
|
mt:OtherAsiaandAfricaMember |
| 1068 |
Disclosure of geographical areas [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfGeographicalAreasLineItems |
| 1069 |
Non-current assets other than financial instruments, deferred tax assets, post-employment benefit assets, and rights arising under insurance contracts |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentAssetsOtherThanFinancialInstrumentsDeferredTaxAssetsPostemploymentBenefitAssetsAndRightsArisingUnderInsuranceContracts |
| 1070 |
Unallocated assets |
Concept (Monetary) |
As Of |
Debit |
mt:UnallocatedAssets |
| 1071 |
Total non-current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentAssets |
| 1072 |
2407405 - Disclosure - SEGMENT REPORTING - Sales by Type of Products (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/SegmentReportingSalesByTypeOfProductsDetails |
| 1073 |
Disclosure of products and services [table] |
Table |
* |
* |
ifrs-full:DisclosureOfProductsAndServicesTable |
| 1074 |
Products and services [axis] |
Axis |
|
|
ifrs-full:ProductsAndServicesAxis |
| 1075 |
Products and services [member] |
Member |
|
|
ifrs-full:ProductsAndServicesMember |
| 1076 |
Flat products |
Member |
|
|
mt:FlatproductsMember |
| 1077 |
Long products |
Member |
|
|
mt:LongproductsMember |
| 1078 |
Tubular products |
Member |
|
|
mt:TubularproductsMember |
| 1079 |
Mining products |
Member |
|
|
mt:MiningproductsMember |
| 1080 |
Others |
Member |
|
|
mt:OtherproductsMember |
| 1081 |
Disclosure of products and services [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfProductsAndServicesLineItems |
| 1082 |
Sales |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromContractsWithCustomers |
| 1083 |
2407406 - Disclosure - SEGMENT REPORTING - Disaggregated Revenue (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/SegmentReportingDisaggregatedRevenueDetails |
| 1084 |
Disclosure of disaggregation of revenue from contracts with customers [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable |
| 1085 |
Segment consolidation items [axis] |
Axis |
|
|
ifrs-full:SegmentConsolidationItemsAxis |
| 1086 |
Entity's total for segment consolidation items [member] |
Member |
|
|
ifrs-full:EntitysTotalForSegmentConsolidationItemsMember |
| 1087 |
Operating segments |
Member |
|
|
ifrs-full:OperatingSegmentsMember |
| 1088 |
Others |
Member |
|
|
ifrs-full:UnallocatedAmountsMember |
| 1089 |
Products and services [axis] |
Axis |
|
|
ifrs-full:ProductsAndServicesAxis |
| 1090 |
Products and services [member] |
Member |
|
|
ifrs-full:ProductsAndServicesMember |
| 1091 |
Steel sales |
Member |
|
|
mt:SteelSalesMember |
| 1092 |
Non-steel sales 1 |
Member |
|
|
mt:NonSteelSalesMember |
| 1093 |
By-product sales 2 |
Member |
|
|
mt:ByProductSalesMember |
| 1094 |
Other sales 3 |
Member |
|
|
mt:OtherSalesMember |
| 1095 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 1096 |
Segments [member] |
Member |
|
|
ifrs-full:SegmentsMember |
| 1097 |
NAFTA |
Member |
|
|
mt:NAFTAMember |
| 1098 |
Brazil |
Member |
|
|
mt:BrazilSegmentMember |
| 1099 |
Europe |
Member |
|
|
mt:EuropeSegmentMember |
| 1100 |
ACIS |
Member |
|
|
mt:ACISMember |
| 1101 |
Mining |
Member |
|
|
mt:MiningMember |
| 1102 |
Disclosure of disaggregation of revenue from contracts with customers [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems |
| 1103 |
Sales |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromContractsWithCustomers |
| 1104 |
2434402 - Disclosure - OPERATING DATA - Revenue (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/OperatingDataRevenueDetails |
| 1105 |
Disclosure of performance obligations [table] |
Table |
* |
* |
ifrs-full:DisclosureOfPerformanceObligationsTable |
| 1106 |
Maturity [axis] |
Axis |
|
|
ifrs-full:MaturityAxis |
| 1107 |
Aggregated time bands [member] |
Member |
|
|
ifrs-full:AggregatedTimeBandsMember |
| 1108 |
2019 |
Member |
|
|
ifrs-full:NotLaterThanOneYearMember |
| 1109 |
Disclosure of performance obligations [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfPerformanceObligationsLineItems |
| 1110 |
Description of payment terms in contracts with customers |
Concept (Text/String) |
For Period |
|
ifrs-full:DescriptionOfSignificantPaymentTermsInContractsWithCustomers |
| 1111 |
Advances received |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Advances |
| 1112 |
Revenue, remaining performance obligation, percent |
Concept (Percent) |
As Of |
|
mt:RevenueRemainingPerformanceObligationPercent |
| 1113 |
Trade accounts receivable and other - opening balance |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:ContractAssets |
| 1114 |
Performance obligations satisfied |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromPerformanceObligationsSatisfiedOrPartiallySatisfiedInPreviousPeriods |
| 1115 |
Payments received |
Concept (Monetary) |
For Period |
Credit |
mt:DecreaseThroughPaymentsReceivedContractAssets |
| 1116 |
Impairment of receivables (net of write backs) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DecreaseThroughImpairmentContractAssets |
| 1117 |
Reclassification of the period-end receivables to held for sale |
Concept (Monetary) |
For Period |
Credit |
mt:Decreasethroughreceivablesheldforsale |
| 1118 |
Acquisitions through business combinations |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseThroughBusinessCombinationsContractLiabilities |
| 1119 |
Foreign exchange and scope variations |
Concept (Monetary) |
For Period |
Debit |
mt:IncreaseDecreaseThroughForeignExchangeAndScopeVariationsContractAssets |
| 1120 |
Trade accounts receivable and other - ending balance |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:ContractAssets |
| 1121 |
2434403 - Disclosure - OPERATING DATA - Schedule of Cost of Sales (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/OperatingDataScheduleOfCostOfSalesDetails |
| 1122 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1123 |
Revenue, Cost Of Sales, Current Assets, And Current Liabilities [Abstract] |
Abstract |
|
|
mt:RevenueCostOfSalesCurrentAssetsAndCurrentLiabilitiesAbstract |
| 1124 |
Materials |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:RawMaterialsAndConsumablesUsed |
| 1125 |
Labor costs |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:EmployeeBenefitsExpense |
| 1126 |
Logistic expenses |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:TransportationExpense |
| 1127 |
Depreciation and amortization |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:DepreciationAndAmortisationExpense |
| 1128 |
Gain on bargain purchase |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainRecognisedInBargainPurchaseTransaction |
| 1129 |
Impairment |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss |
| 1130 |
Other |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:OtherExpenseByNature |
| 1131 |
Total |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CostOfSales |
| 1132 |
Gain relating to changes in post-employment benefit plans |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset |
| 1133 |
2434404 - Disclosure - OPERATING DATA - Trade Accounts Receivable and Other - Narrative (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/OperatingDataTradeAccountsReceivableAndOtherNarrativeDetails |
| 1134 |
Disclosure of financial assets that are either past due or impaired [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedTable |
| 1135 |
Impairment of financial assets [axis] |
Axis |
|
|
ifrs-full:ImpairmentOfFinancialAssetsAxis |
| 1136 |
Entity's total for impairment of financial assets [member] |
Member |
|
|
ifrs-full:EntitysTotalForImpairmentOfFinancialAssetsMember |
| 1137 |
Individually assessed for credit losses |
Member |
|
|
ifrs-full:FinancialAssetsIndividuallyAssessedForCreditLossesMember |
| 1138 |
Past due status [axis] |
Axis |
|
|
ifrs-full:PastDueStatusAxis |
| 1139 |
Past due status [member] |
Member |
|
|
ifrs-full:PastDueStatusMember |
| 1140 |
More than 180 days |
Member |
|
|
ifrs-full:LaterThanSixMonthsMember |
| 1141 |
Disclosure of financial assets that are either past due or impaired [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedLineItems |
| 1142 |
Overdue period |
Concept (xbrli:durationItemType) |
For Period |
|
mt:AccountsReceivablePeriodPastDue |
| 1143 |
2434405 - Disclosure - OPERATING DATA - Schedule of Trade Accounts Receivable and Allowance for Expected Credit Losses (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/OperatingDataScheduleOfTradeAccountsReceivableAndAllowanceForExpectedCreditLossesDetails |
| 1144 |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsTable |
| 1145 |
Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] |
Axis |
|
|
ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis |
| 1146 |
Carrying amount [member] |
Member |
|
|
ifrs-full:CarryingAmountMember |
| 1147 |
Gross amount |
Member |
|
|
ifrs-full:GrossCarryingAmountMember |
| 1148 |
Allowance for lifetime expected credit losses |
Member |
|
|
ifrs-full:AllowanceForCreditLossesMember |
| 1149 |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsLineItems |
| 1150 |
Trade accounts receivable |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentTradeReceivables |
| 1151 |
2434406 - Disclosure - OPERATING DATA - Exposure to Credit Risk by Reportable Segment (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/OperatingDataExposureToCreditRiskByReportableSegmentDetails |
| 1152 |
Disclosure of credit risk exposure [table] |
Table |
* |
* |
ifrs-full:DisclosureOfCreditRiskExposureTable |
| 1153 |
Classes of financial instruments [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialInstrumentsAxis |
| 1154 |
Financial instruments, class [member] |
Member |
|
|
ifrs-full:ClassesOfFinancialInstrumentsMember |
| 1155 |
Trade accounts receivables |
Member |
|
|
ifrs-full:TradeReceivablesMember |
| 1156 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 1157 |
Segments [member] |
Member |
|
|
ifrs-full:SegmentsMember |
| 1158 |
NAFTA |
Member |
|
|
mt:NAFTAMember |
| 1159 |
Brazil |
Member |
|
|
mt:BrazilSegmentMember |
| 1160 |
Europe |
Member |
|
|
mt:EuropeSegmentMember |
| 1161 |
ACIS |
Member |
|
|
mt:ACISMember |
| 1162 |
Mining |
Member |
|
|
mt:MiningMember |
| 1163 |
Disclosure of credit risk exposure [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfCreditRiskExposureLineItems |
| 1164 |
Maximum exposure to credit risk |
Concept (Monetary) |
As Of |
|
ifrs-full:MaximumExposureToCreditRiskOfLoansOrReceivables |
| 1165 |
2434407 - Disclosure - OPERATING DATA - Aging of Trade Accounts Receivable (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/OperatingDataAgingOfTradeAccountsReceivableDetails |
| 1166 |
Disclosure of provision matrix [table] |
Table |
* |
* |
ifrs-full:DisclosureOfProvisionMatrixTable |
| 1167 |
Classes of financial instruments [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialInstrumentsAxis |
| 1168 |
Financial instruments, class [member] |
Member |
|
|
ifrs-full:ClassesOfFinancialInstrumentsMember |
| 1169 |
Trade accounts receivables |
Member |
|
|
ifrs-full:TradeReceivablesMember |
| 1170 |
Past due status [axis] |
Axis |
|
|
ifrs-full:PastDueStatusAxis |
| 1171 |
Past due status [member] |
Member |
|
|
ifrs-full:PastDueStatusMember |
| 1172 |
Not past due |
Member |
|
|
ifrs-full:CurrentMember |
| 1173 |
Overdue 1-30 days |
Member |
|
|
ifrs-full:NotLaterThanOneMonthMember |
| 1174 |
Overdue 31-60 days |
Member |
|
|
ifrs-full:LaterThanOneMonthAndNotLaterThanTwoMonthsMember |
| 1175 |
Overdue 61-90 days |
Member |
|
|
ifrs-full:LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember |
| 1176 |
Overdue 91-180 days |
Member |
|
|
ifrs-full:LaterThanThreeMonthsAndNotLaterThanSixMonthsMember |
| 1177 |
More than 180 days |
Member |
|
|
ifrs-full:LaterThanSixMonthsMember |
| 1178 |
Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] |
Axis |
|
|
ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis |
| 1179 |
Carrying amount [member] |
Member |
|
|
ifrs-full:CarryingAmountMember |
| 1180 |
Gross |
Member |
|
|
ifrs-full:GrossCarryingAmountMember |
| 1181 |
Allowance under lifetime expected credit loss model (IFRS 9) |
Member |
|
|
ifrs-full:AccumulatedImpairmentMember |
| 1182 |
Disclosure of provision matrix [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfProvisionMatrixLineItems |
| 1183 |
Trade accounts receivables |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:FinancialAssets |
| 1184 |
2434408 - Disclosure - OPERATING DATA - Movement in the Allowance for Doubtful Accounts (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/OperatingDataMovementInAllowanceForDoubtfulAccountsDetails |
| 1185 |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsTable |
| 1186 |
Classes of financial instruments [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialInstrumentsAxis |
| 1187 |
Financial instruments, class [member] |
Member |
|
|
ifrs-full:ClassesOfFinancialInstrumentsMember |
| 1188 |
Trade accounts receivables |
Member |
|
|
ifrs-full:TradeReceivablesMember |
| 1189 |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsLineItems |
| 1190 |
Reconciliation of changes in allowance account for credit losses of financial assets [abstract] |
Abstract |
|
|
ifrs-full:ReconciliationOfChangesInAllowanceAccountForCreditLossesOfFinancialAssetsAbstract |
| 1191 |
Balance as of beginning of year |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets |
| 1192 |
Additions |
Concept (Monetary) |
For Period |
|
ifrs-full:AdditionalAllowanceRecognisedInProfitOrLossAllowanceAccountForCreditLossesOfFinancialAssets |
| 1193 |
Deductions/ Releases |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:UtilisationAllowanceAccountForCreditLossesOfFinancialAssets |
| 1194 |
Foreign exchange and others |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesAllowanceAccountForCreditLossesOfFinancialAssets |
| 1195 |
Balance as of end of year |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets |
| 1196 |
2434409 - Disclosure - OPERATING DATA - Inventories - Narrative (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/OperatingDataInventoriesNarrativeDetails |
| 1197 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1198 |
Revenue, Cost Of Sales, Current Assets, And Current Liabilities [Abstract] |
Abstract |
|
|
mt:RevenueCostOfSalesCurrentAssetsAndCurrentLiabilitiesAbstract |
| 1199 |
Allowance for slow-moving inventory, excess of cost over net realizable value and obsolescence |
Concept (Monetary) |
As Of |
Credit |
mt:InventoryValuationReserves1 |
| 1200 |
2434410 - Disclosure - OPERATING DATA - Schedule of Inventories (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/OperatingDataScheduleOfInventoriesDetails |
| 1201 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1202 |
Revenue, Cost Of Sales, Current Assets, And Current Liabilities [Abstract] |
Abstract |
|
|
mt:RevenueCostOfSalesCurrentAssetsAndCurrentLiabilitiesAbstract |
| 1203 |
Finished products |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:FinishedGoods |
| 1204 |
Production in process |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:WorkInProgress |
| 1205 |
Raw materials |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:RawMaterials |
| 1206 |
Manufacturing supplies, spare parts and other |
Concept (Monetary) |
As Of |
Debit |
mt:CurrentProductionSuppliesSparePartsAndOtherInventories |
| 1207 |
Total |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Inventories |
| 1208 |
Spare parts |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:SpareParts |
| 1209 |
Manufacturing and other |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherInventories |
| 1210 |
2434411 - Disclosure - OPERATING DATA - Movement in Inventory Reserve (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/OperatingDataMovementInInventoryReserveDetails |
| 1211 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1212 |
Revenue, Cost Of Sales, Current Assets, And Current Liabilities [Abstract] |
Abstract |
|
|
mt:RevenueCostOfSalesCurrentAssetsAndCurrentLiabilitiesAbstract |
| 1213 |
Balance as of beginning of year |
Concept (Monetary) |
As Of |
Credit |
mt:InventoryValuationReserves1 |
| 1214 |
Additions |
Concept (Monetary) |
For Period |
|
ifrs-full:InventoryWritedown2011 |
| 1215 |
Deductions/Releases |
Concept (Monetary) |
For Period |
|
ifrs-full:ReversalOfInventoryWritedown |
| 1216 |
Foreign exchange and others |
Concept (Monetary) |
For Period |
Credit |
mt:InventoryValuationReservesForeignCurrencyTranslationGainLossandOther |
| 1217 |
Balance as of end of year |
Concept (Monetary) |
As Of |
Credit |
mt:InventoryValuationReserves1 |
| 1218 |
2434412 - Disclosure - OPERATING DATA - Schedule of Prepaid Expenses and Other Current Assets (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/OperatingDataScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails |
| 1219 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1220 |
Revenue, Cost Of Sales, Current Assets, And Current Liabilities [Abstract] |
Abstract |
|
|
mt:RevenueCostOfSalesCurrentAssetsAndCurrentLiabilitiesAbstract |
| 1221 |
VAT receivables |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentValueAddedTaxReceivables |
| 1222 |
Prepaid expenses and non-trade receivables |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentPrepaymentsAndCurrentAccruedIncome |
| 1223 |
Financial amounts receivable |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentLoansAndReceivables |
| 1224 |
Income tax receivable |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentTaxAssetsCurrent |
| 1225 |
Receivables from public authorities |
Concept (Monetary) |
As Of |
Debit |
mt:CurrentReceivablesFromPublicAuthorities |
| 1226 |
Receivables from sale of financial and intangible assets |
Concept (Monetary) |
As Of |
Debit |
mt:CurrentReceivablesFromSaleOfFinancialAndIntangibleAssets |
| 1227 |
Derivative financial instruments |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentDerivativeFinancialAssets |
| 1228 |
Other |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherCurrentAssets |
| 1229 |
Total |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentPrepaymentsAndOtherCurrentAssets |
| 1230 |
2434413 - Disclosure - OPERATING DATA - Schedule of Other Assets (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/OperatingDataScheduleOfOtherAssetsDetails |
| 1231 |
Disclosure of joint ventures [table] |
Table |
* |
* |
ifrs-full:DisclosureOfJointVenturesTable |
| 1232 |
Counterparties [axis] |
Axis |
|
|
ifrs-full:CounterpartiesAxis |
| 1233 |
Counterparties [member] |
Member |
|
|
ifrs-full:CounterpartiesMember |
| 1234 |
Uttam Galva |
Member |
|
|
mt:UttamGalvaMember |
| 1235 |
KSS Petron |
Member |
|
|
mt:KSSPetronMember |
| 1236 |
Joint ventures [axis] |
Axis |
|
|
ifrs-full:JointVenturesAxis |
| 1237 |
Entity's total for joint ventures [member] |
Member |
|
|
ifrs-full:EntitysTotalForJointVenturesMember |
| 1238 |
Essar Steel India Limited |
Member |
|
|
mt:EssarSteelIndiaLimitedMember |
| 1239 |
Disclosure of joint ventures [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfJointVenturesLineItems |
| 1240 |
Derivative financial instruments |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentDerivativeFinancialAssets |
| 1241 |
Financial amounts receivable |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentLoansAndReceivables |
| 1242 |
Long-term VAT receivables |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentValueAddedTaxReceivables |
| 1243 |
Cash guarantees and deposits |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:LongtermDeposits |
| 1244 |
Receivables from public authorities |
Concept (Monetary) |
As Of |
Debit |
mt:NoncurrentReceivablesFromPublicAuthorities |
| 1245 |
Accrued interest |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentInterestReceivable |
| 1246 |
Receivables from sale of financial and intangible assets |
Concept (Monetary) |
As Of |
Debit |
mt:NoncurrentReceivablesFromSaleOfFinancialAndIntangibleAssets |
| 1247 |
Income tax receivable |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentTaxAssetsNoncurrent |
| 1248 |
Other |
Concept (Monetary) |
As Of |
Debit |
mt:OtherAssetsMiscellaneousNoncurrent1 |
| 1249 |
Total |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherNoncurrentAssets |
| 1250 |
Impairment loss recognized in connection with recoverable liquidation value |
Concept (Monetary) |
For Period |
Debit |
mt:ImpairmentLossRecognisedInProfitOrLossRecoverableLiquidationValue |
| 1251 |
Financial assets at fair value through profit or loss |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLoss |
| 1252 |
2434414 - Disclosure - OPERATING DATA - Trade Accounts Payable and Other - Narrative (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/OperatingDataTradeAccountsPayableAndOtherNarrativeDetails |
| 1253 |
Disclosure of voluntary change in accounting policy [table] |
Table |
* |
* |
ifrs-full:DisclosureOfVoluntaryChangeInAccountingPolicyTable |
| 1254 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 1255 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 1256 |
Bottom of range |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 1257 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 1258 |
Disclosure of voluntary change in accounting policy [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfVoluntaryChangeInAccountingPolicyLineItems |
| 1259 |
Trade accounts payable maturities |
Concept (xbrli:durationItemType) |
For Period |
|
mt:TradePayablesMaturityPeriod |
| 1260 |
2434415 - Disclosure - OPERATING DATA - Schedule of Accrued Expenses and Other Liabilities (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/OperatingDataScheduleOfAccruedExpensesAndOtherLiabilitiesDetails |
| 1261 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1262 |
Revenue, Cost Of Sales, Current Assets, And Current Liabilities [Abstract] |
Abstract |
|
|
mt:RevenueCostOfSalesCurrentAssetsAndCurrentLiabilitiesAbstract |
| 1263 |
Accrued payroll and employee related expenses |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ShorttermEmployeeBenefitsAccruals |
| 1264 |
Accrued interest and other payables |
Concept (Monetary) |
As Of |
Credit |
mt:CurrentInterestPayableAndOtherSundryLiabilitiesCurrent |
| 1265 |
Payable from acquisition of intangible, tangible & financial assets |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentPayablesForPurchaseOfNoncurrentAssets |
| 1266 |
Other amounts due to public authorities |
Concept (Monetary) |
As Of |
Credit |
mt:CurrentPublicAuthoritiesLiabilities |
| 1267 |
Derivative financial instruments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentDerivativeFinancialLiabilities |
| 1268 |
Unearned revenue and accrued payables |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:AccrualsAndDeferredIncome |
| 1269 |
Total |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentAccruedExpensesAndOtherCurrentLiabilities |
| 1270 |
2436402 - Disclosure - GOODWILL, INTANGIBLE AND TANGIBLE ASSETS - Goodwill and Intangible Assets (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/GoodwillIntangibleAndTangibleAssetsGoodwillAndIntangibleAssetsDetails |
| 1271 |
Disclosure of reconciliation of changes in intangible assets and goodwill [table] |
Table |
* |
* |
ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable |
| 1272 |
Business combinations [axis] |
Axis |
|
|
ifrs-full:BusinessCombinationsAxis |
| 1273 |
Entity's total for business combinations [member] |
Member |
|
|
ifrs-full:EntitysTotalForBusinessCombinationsMember |
| 1274 |
Ilva |
Member |
|
|
mt:IlvaS.p.A.Member |
| 1275 |
Classes of intangible assets and goodwill [axis] |
Axis |
|
|
ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis |
| 1276 |
Intangible assets and goodwill [member] |
Member |
|
|
ifrs-full:IntangibleAssetsAndGoodwillMember |
| 1277 |
Goodwill |
Member |
|
|
ifrs-full:GoodwillMember |
| 1278 |
Classes of intangible assets other than goodwill [axis] |
Axis |
|
|
ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis |
| 1279 |
Intangible assets other than goodwill [member] |
Member |
|
|
ifrs-full:IntangibleAssetsOtherThanGoodwillMember |
| 1280 |
Concessions, patents and licenses |
Member |
|
|
mt:ConcessionsPatentsAndLicensesMember |
| 1281 |
Customer relationships and trade marks |
Member |
|
|
ifrs-full:CustomerrelatedIntangibleAssetsMember |
| 1282 |
Other |
Member |
|
|
ifrs-full:OtherIntangibleAssetsMember |
| 1283 |
Emission rights |
Member |
|
|
mt:EmissionRightsMember |
| 1284 |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems |
| 1285 |
Identifiable intangible assets recognised as of acquisition date |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate |
| 1286 |
Favorable land lease contracts recognised as of acquisition date |
Concept (Monetary) |
As Of |
Credit |
mt:FavorableLandLeaseContractsRecognisedAsOfAcquisitionDate |
| 1287 |
Goodwill and intangible assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IntangibleAssetsAndGoodwill |
| 1288 |
2436403 - Disclosure - GOODWILL, INTANGIBLE AND TANGIBLE ASSETS - Goodwill and Intangible Assets, Goodwill (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/GoodwillIntangibleAndTangibleAssetsGoodwillAndIntangibleAssetsGoodwillDetails |
| 1289 |
Disclosure of reconciliation of changes in intangible assets and goodwill [table] |
Table |
* |
* |
ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable |
| 1290 |
Classes of intangible assets and goodwill [axis] |
Axis |
|
|
ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis |
| 1291 |
Intangible assets and goodwill [member] |
Member |
|
|
ifrs-full:IntangibleAssetsAndGoodwillMember |
| 1292 |
Goodwill |
Member |
|
|
ifrs-full:GoodwillMember |
| 1293 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 1294 |
Segments [member] |
Member |
|
|
ifrs-full:SegmentsMember |
| 1295 |
NAFTA |
Member |
|
|
mt:NAFTAMember |
| 1296 |
Brazil |
Member |
|
|
mt:BrazilSegmentMember |
| 1297 |
Europe |
Member |
|
|
mt:EuropeSegmentMember |
| 1298 |
ACIS |
Member |
|
|
mt:ACISMember |
| 1299 |
Business combinations [axis] |
Axis |
|
|
ifrs-full:BusinessCombinationsAxis |
| 1300 |
Entity's total for business combinations [member] |
Member |
|
|
ifrs-full:EntitysTotalForBusinessCombinationsMember |
| 1301 |
Sumaré |
Member |
|
|
mt:SumarMember |
| 1302 |
Votorantim S.A. |
Member |
|
|
mt:VotorantimSiderurgiaMember |
| 1303 |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems |
| 1304 |
Reconciliation of changes in intangible assets and goodwill [abstract] |
Abstract |
|
|
ifrs-full:ReconciliationOfChangesInIntangibleAssetsAndGoodwillAbstract |
| 1305 |
Goodwill beginning balance |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IntangibleAssetsAndGoodwill |
| 1306 |
Divestments and assets held for sale |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DecreaseThroughClassifiedAsHeldForSaleIntangibleAssetsAndGoodwill |
| 1307 |
Foreign exchange differences and other movements |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill |
| 1308 |
Goodwill ending balance |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IntangibleAssetsAndGoodwill |
| 1309 |
2436404 - Disclosure - GOODWILL, INTANGIBLE AND TANGIBLE ASSETS - Goodwill and Intangible Assets, Other Intangible Assets (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/GoodwillIntangibleAndTangibleAssetsGoodwillAndIntangibleAssetsOtherIntangibleAssetsDetails |
| 1310 |
Disclosure of detailed information about intangible assets [table] |
Table |
* |
* |
ifrs-full:DisclosureOfIntangibleAssetsTable |
| 1311 |
Classes of intangible assets other than goodwill [axis] |
Axis |
|
|
ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis |
| 1312 |
Intangible assets other than goodwill [member] |
Member |
|
|
ifrs-full:IntangibleAssetsOtherThanGoodwillMember |
| 1313 |
Concessions, patents and licenses |
Member |
|
|
mt:ConcessionsPatentsAndLicensesMember |
| 1314 |
Customer relationships and trade marks |
Member |
|
|
ifrs-full:CustomerrelatedIntangibleAssetsMember |
| 1315 |
Other |
Member |
|
|
ifrs-full:OtherIntangibleAssetsMember |
| 1316 |
Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] |
Axis |
|
|
ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis |
| 1317 |
Carrying amount [member] |
Member |
|
|
ifrs-full:CarryingAmountMember |
| 1318 |
Gross carrying amount |
Member |
|
|
ifrs-full:GrossCarryingAmountMember |
| 1319 |
Accumulated depreciation and impairment |
Member |
|
|
ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember |
| 1320 |
Disclosure of detailed information about intangible assets [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfIntangibleAssetsLineItems |
| 1321 |
Useful life |
Concept (xbrli:durationItemType) |
For Period |
|
mt:UsefulLivesOrAmortisationRatesIntangibleAssetsOtherThanGoodwillPeriod1 |
| 1322 |
Reconciliation of changes in intangible assets other than goodwill [abstract] |
Abstract |
|
|
ifrs-full:ReconciliationOfChangesInIntangibleAssetsOtherThanGoodwillAbstract |
| 1323 |
Intangible assets other than goodwill |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IntangibleAssetsOtherThanGoodwill |
| 1324 |
Acquisitions |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill |
| 1325 |
Acquisitions through business combinations |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill |
| 1326 |
Disposals |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DisposalsIntangibleAssetsOtherThanGoodwill |
| 1327 |
Amortization charge |
Concept (Monetary) |
For Period |
|
ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill |
| 1328 |
Foreign exchange differences |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill |
| 1329 |
Transfers to assets held for sale (note 2.3) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DecreaseThroughClassifiedAsHeldForSaleIntangibleAssetsOtherThanGoodwill |
| 1330 |
Transfers and other movements |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesIntangibleAssetsOtherThanGoodwill |
| 1331 |
Fully amortized intangible assets |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ChangesInIntangibleAssetsOtherThanGoodwill |
| 1332 |
Intangible assets other than goodwill |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IntangibleAssetsOtherThanGoodwill |
| 1333 |
Research and development costs |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ResearchAndDevelopmentExpense |
| 1334 |
2436405 - Disclosure - GOODWILL, INTANGIBLE AND TANGIBLE ASSETS - Property, Plant and Equipment and Biological Assets, Useful Lives (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/GoodwillIntangibleAndTangibleAssetsPropertyPlantAndEquipmentAndBiologicalAssetsUsefulLivesDetails |
| 1335 |
Disclosure of detailed information about property, plant and equipment [table] |
Table |
* |
* |
ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable |
| 1336 |
Classes of property, plant and equipment [axis] |
Axis |
|
|
ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis |
| 1337 |
Property, plant and equipment [member] |
Member |
|
|
ifrs-full:PropertyPlantAndEquipmentMember |
| 1338 |
Buildings |
Member |
|
|
ifrs-full:BuildingsMember |
| 1339 |
Property plant & equipment |
Member |
|
|
ifrs-full:OtherPropertyPlantAndEquipmentMember |
| 1340 |
Auxiliary facilities |
Member |
|
|
mt:AuxiliaryFacilitiesMember |
| 1341 |
Other facilities |
Member |
|
|
mt:OtherFacilitiesMember |
| 1342 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 1343 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 1344 |
Bottom of range |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 1345 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 1346 |
Disclosure of detailed information about property, plant and equipment [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems |
| 1347 |
Useful life |
Concept (xbrli:durationItemType) |
For Period |
|
mt:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipmentPeriod |
| 1348 |
2436406 - Disclosure - GOODWILL, INTANGIBLE AND TANGIBLE ASSETS - Property, Plant and Equipment and Biological Assets (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/GoodwillIntangibleAndTangibleAssetsPropertyPlantAndEquipmentAndBiologicalAssetsDetails |
| 1349 |
Disclosure of detailed information about property, plant and equipment [table] |
Table |
* |
* |
ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable |
| 1350 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 1351 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 1352 |
Bottom of range |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 1353 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 1354 |
Classes of property, plant and equipment [axis] |
Axis |
|
|
ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis |
| 1355 |
Property, plant and equipment [member] |
Member |
|
|
ifrs-full:PropertyPlantAndEquipmentMember |
| 1356 |
Land, buildings and Improvements |
Member |
|
|
ifrs-full:LandAndBuildingsMember |
| 1357 |
Machinery, equipment and other |
Member |
|
|
mt:MachineryEquipmentAndOtherMember |
| 1358 |
Construction in progress |
Member |
|
|
ifrs-full:ConstructionInProgressMember |
| 1359 |
Mining Assets |
Member |
|
|
ifrs-full:MiningAssetsMember |
| 1360 |
Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] |
Axis |
|
|
ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis |
| 1361 |
Carrying amount [member] |
Member |
|
|
ifrs-full:CarryingAmountMember |
| 1362 |
Gross carrying amount |
Member |
|
|
ifrs-full:GrossCarryingAmountMember |
| 1363 |
Accumulated depreciation and impairment |
Member |
|
|
ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember |
| 1364 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 1365 |
Segments [member] |
Member |
|
|
ifrs-full:SegmentsMember |
| 1366 |
Brazil |
Member |
|
|
mt:BrazilSegmentMember |
| 1367 |
NAFTA |
Member |
|
|
mt:NAFTAMember |
| 1368 |
Europe |
Member |
|
|
mt:EuropeSegmentMember |
| 1369 |
Disclosure of detailed information about property, plant and equipment [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems |
| 1370 |
Harvest cycle period |
Concept (xbrli:durationItemType) |
For Period |
|
mt:BiologicalAssetsHarvestCyclePeriod |
| 1371 |
Reconciliation of changes in property, plant and equipment [abstract] |
Abstract |
|
|
ifrs-full:ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract |
| 1372 |
Property, plant and equipment beginning balance |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PropertyPlantAndEquipment |
| 1373 |
Additions |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment |
| 1374 |
Acquisitions through business combinations |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment |
| 1375 |
Foreign exchange differences |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment |
| 1376 |
Disposals |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DisposalsPropertyPlantAndEquipment |
| 1377 |
Divestments |
Concept (Monetary) |
For Period |
Credit |
mt:ReversalOfDepreciationThroughDivestmentPropertyPlantAndEquipment |
| 1378 |
Transfers to assets held for sale |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DecreaseThroughClassifiedAsHeldForSalePropertyPlantAndEquipment |
| 1379 |
Other movements |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncreaseDecreaseThroughOtherChangesPropertyPlantAndEquipment |
| 1380 |
Depreciation charge for the year |
Concept (Monetary) |
For Period |
|
ifrs-full:DepreciationPropertyPlantAndEquipment |
| 1381 |
Impairment |
Concept (Monetary) |
For Period |
|
ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment |
| 1382 |
Property, plant and equipment ending balance |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PropertyPlantAndEquipment |
| 1383 |
Biological assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:BiologicalAssets |
| 1384 |
Bearer plants |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:BearerPlants |
| 1385 |
Property, plant and equipment, temporarily idle |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PropertyPlantAndEquipmentTemporarilyIdle |
| 1386 |
Property, plant and equipment, assets retired from active use and not classified as held for sale |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PropertyPlantAndEquipmentCarryingAmountOfAssetsRetiredFromActiveUse |
| 1387 |
2436407 - Disclosure - GOODWILL, INTANGIBLE AND TANGIBLE ASSETS - Property, Plant and Equipment and Biological Assets, Lease Arrangements (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/GoodwillIntangibleAndTangibleAssetsPropertyPlantAndEquipmentAndBiologicalAssetsLeaseArrangementsDetails |
| 1388 |
Disclosure of finance lease and operating lease by lessee [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable |
| 1389 |
Classes of property, plant and equipment [axis] |
Axis |
|
|
ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis |
| 1390 |
Property, plant and equipment [member] |
Member |
|
|
ifrs-full:PropertyPlantAndEquipmentMember |
| 1391 |
Machinery, equipment and other |
Member |
|
|
mt:MachineryEquipmentAndOtherMember |
| 1392 |
Buildings |
Member |
|
|
ifrs-full:BuildingsMember |
| 1393 |
Land |
Member |
|
|
ifrs-full:LandMember |
| 1394 |
Maturity [axis] |
Axis |
|
|
ifrs-full:MaturityAxis |
| 1395 |
Aggregated time bands [member] |
Member |
|
|
ifrs-full:AggregatedTimeBandsMember |
| 1396 |
Less than 1 year |
Member |
|
|
ifrs-full:NotLaterThanOneYearMember |
| 1397 |
Later than one year and not later than five years |
Member |
|
|
ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember |
| 1398 |
More than 5 years |
Member |
|
|
ifrs-full:LaterThanFiveYearsMember |
| 1399 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 1400 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 1401 |
Bottom of range |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 1402 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 1403 |
Disclosure of finance lease and operating lease by lessee [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems |
| 1404 |
Capitalized amount |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:RecognisedFinanceLeaseAsAssets |
| 1405 |
Minimum finance lease payments payable |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:MinimumFinanceLeasePaymentsPayable |
| 1406 |
Less: future finance charges |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:FutureFinanceChargeOnFinanceLease |
| 1407 |
Present value of minimum lease payments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:MinimumFinanceLeasePaymentsPayableAtPresentValue |
| 1408 |
Weighted average discount rate |
Concept (Percent) |
As Of |
|
mt:FinanceLeaseWeightedAverageDiscountRatePercent1 |
| 1409 |
Lease term |
Concept (xbrli:durationItemType) |
For Period |
|
mt:FinanceLeaseWeightedAverageRemainingLeaseTerm1 |
| 1410 |
2436408 - Disclosure - GOODWILL, INTANGIBLE AND TANGIBLE ASSETS - Impairment of Intangible Assets, Including Goodwill, and Tangible Assets (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/GoodwillIntangibleAndTangibleAssetsImpairmentOfIntangibleAssetsIncludingGoodwillAndTangibleAssetsDetails |
| 1411 |
Disclosure of reconciliation of changes in intangible assets and goodwill [table] |
Table |
* |
* |
ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable |
| 1412 |
Classes of assets [axis] |
Axis |
|
|
ifrs-full:ClassesOfAssetsAxis |
| 1413 |
Assets [member] |
Member |
|
|
ifrs-full:ClassesOfAssetsMember |
| 1414 |
Goodwill |
Member |
|
|
ifrs-full:GoodwillMember |
| 1415 |
Tangible assets |
Member |
|
|
mt:TangibleAssetsMember |
| 1416 |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems |
| 1417 |
Impairment loss recognised in profit or loss |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ImpairmentLossRecognisedInProfitOrLoss |
| 1418 |
2436409 - Disclosure - GOODWILL, INTANGIBLE AND TANGIBLE ASSETS - Impairment of Intangible Assets, Including Goodwill, and Tangible Assets, Impairment Test of Goodwill and Intangible Assets (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/GoodwillIntangibleAndTangibleAssetsImpairmentOfIntangibleAssetsIncludingGoodwillAndTangibleAssetsImpairmentTestOfGoodwillAndIntangibleAssetsDetails |
| 1419 |
Disclosure of information for cash-generating units [table] |
Table |
* |
* |
ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesTable |
| 1420 |
Assets and liabilities classified as held for sale [axis] |
Axis |
|
|
ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis |
| 1421 |
Assets and liabilities classified as held for sale [member] |
Member |
|
|
ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleMember |
| 1422 |
Disposal groups classified as held for sale |
Member |
|
|
ifrs-full:DisposalGroupsClassifiedAsHeldForSaleMember |
| 1423 |
Disposal Group Classification [Axis] |
Axis |
|
|
mt:DisposalGroupClassification1Axis |
| 1424 |
Disposal Group Classification [Domain] |
Member |
|
|
mt:DisposalGroupClassification1Domain |
| 1425 |
Disposal Group, Disposed of by Sale, Not Discontinued Operations |
Member |
|
|
mt:DisposalGroupDisposedofbySaleNotDiscontinuedOperationsMember |
| 1426 |
Disposal Group Name [Axis] |
Axis |
|
|
mt:DisposalGroupNameAxis |
| 1427 |
Disposal Group Name [Domain] |
Member |
|
|
mt:DisposalGroupNameDomain |
| 1428 |
Votorantim remedies |
Member |
|
|
mt:VotorantimremediesMember |
| 1429 |
Ilva remedies |
Member |
|
|
mt:IlvaRemediesMember |
| 1430 |
Cash-generating units [axis] |
Axis |
|
|
ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis |
| 1431 |
Entity's total for cash-generating units [member] |
Member |
|
|
ifrs-full:EntitysTotalForCashgeneratingUnitsMember |
| 1432 |
Cash-generating units |
Member |
|
|
ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesMember |
| 1433 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 1434 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 1435 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 1436 |
Bottom of range |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 1437 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 1438 |
Segments [member] |
Member |
|
|
ifrs-full:SegmentsMember |
| 1439 |
NAFTA |
Member |
|
|
mt:NAFTAMember |
| 1440 |
Brazil |
Member |
|
|
mt:BrazilSegmentMember |
| 1441 |
Europe |
Member |
|
|
mt:EuropeSegmentMember |
| 1442 |
ACIS |
Member |
|
|
mt:ACISMember |
| 1443 |
Disclosure of information for cash-generating units [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesLineItems |
| 1444 |
Iron ore |
Concept (Decimal) |
As Of |
|
mt:GoodwillPriceAssumptionsIronOre |
| 1445 |
Coking coal |
Concept (Decimal) |
As Of |
|
mt:GoodwillPriceAssumptionsCokingCoal |
| 1446 |
Estimated growth rate |
Concept (Percent) |
As Of |
|
ifrs-full:DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections |
| 1447 |
Weighted average pre-tax discount rate used |
Concept (Percent) |
As Of |
|
ifrs-full:DescriptionOfDiscountRatesAppliedToCashFlowProjections |
| 1448 |
Impairment of goodwill |
Concept (Monetary) |
For Period |
|
ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill |
| 1449 |
Increase (decrease) in sales volume |
Concept (num:massItemType) |
For Period |
|
mt:IncreaseDecreaseinSalesVolume |
| 1450 |
Excess of recoverable amount over carrying amount |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:AmountByWhichUnitsRecoverableAmountExceedsItsCarryingAmount |
| 1451 |
Increase in pre-tax discount rate (change in basis points) |
Concept (Percent) |
As Of |
|
mt:GoodwillImpairedIncreaseDecreaseinDiscountRate |
| 1452 |
Decrease in average selling price (change in %) |
Concept (Percent) |
As Of |
|
mt:GoodwillImpairedIncreaseDecreaseinAverageSellingPricePercent |
| 1453 |
Decrease in shipments (change in %) |
Concept (Percent) |
As Of |
|
mt:GoodwillImpairedIncreaseDecreaseinShipmentsPercent |
| 1454 |
2436410 - Disclosure - GOODWILL, INTANGIBLE AND TANGIBLE ASSETS - Impairment of Intangible Assets, Including Goodwill, and Tangible Assets, Impairment Test of Property, Plant and Equipment (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/GoodwillIntangibleAndTangibleAssetsImpairmentOfIntangibleAssetsIncludingGoodwillAndTangibleAssetsImpairmentTestOfPropertyPlantAndEquipmentDetails |
| 1455 |
Disclosure of information for cash-generating units [table] |
Table |
* |
* |
ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesTable |
| 1456 |
Disposal Group Name [Axis] |
Axis |
|
|
mt:DisposalGroupNameAxis |
| 1457 |
Disposal Group Name [Domain] |
Member |
|
|
mt:DisposalGroupNameDomain |
| 1458 |
Votorantim remedies |
Member |
|
|
mt:VotorantimremediesMember |
| 1459 |
Disposal Group Classification [Axis] |
Axis |
|
|
mt:DisposalGroupClassification1Axis |
| 1460 |
Disposal Group Classification [Domain] |
Member |
|
|
mt:DisposalGroupClassification1Domain |
| 1461 |
Disposal Group, Disposed of by Sale, Not Discontinued Operations |
Member |
|
|
mt:DisposalGroupDisposedofbySaleNotDiscontinuedOperationsMember |
| 1462 |
Individual assets or cash-generating units [axis] |
Axis |
|
|
ifrs-full:IndividualAssetsOrCashgeneratingUnitsAxis |
| 1463 |
Entity's total for individual assets or cash-generating units [member] |
Member |
|
|
ifrs-full:EntitysTotalForIndividualAssetsOrCashgeneratingUnitsMember |
| 1464 |
Ilva remedies |
Member |
|
|
mt:IlvaRemediesMember |
| 1465 |
ArcelorMittal South Africa Ltd. (AMSA) |
Member |
|
|
mt:ArcelorMittalSouthAfricaLtd.Member |
| 1466 |
Long Carbon facilities |
Member |
|
|
mt:LongCarbonFacilityMember |
| 1467 |
Long Steel Products |
Member |
|
|
mt:LongSteelProductsMember |
| 1468 |
Vanderbijlpark Facility |
Member |
|
|
mt:VanderbijlparkFacilityMember |
| 1469 |
ArcelorMittal Zaragoza |
Member |
|
|
mt:ArcelorMittalZaragozaMember |
| 1470 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 1471 |
Segments [member] |
Member |
|
|
ifrs-full:SegmentsMember |
| 1472 |
Europe |
Member |
|
|
mt:EuropeSegmentMember |
| 1473 |
ACIS |
Member |
|
|
mt:ACISMember |
| 1474 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 1475 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 1476 |
South Africa |
Member |
|
|
country:ZA |
| 1477 |
Disclosure of information for cash-generating units [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesLineItems |
| 1478 |
Number of cash-generating units |
Concept (Integer) |
For Period |
|
mt:NumberOfCashGeneratingUnits |
| 1479 |
Impairment charge related for property, plant and equipment |
Concept (Monetary) |
For Period |
|
ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment |
| 1480 |
Discount rate |
Concept (Percent) |
For Period |
|
mt:PropertyPlantandEquipmentDiscountRateBeforeTax |
| 1481 |
Property, plant and equipment and biological assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PropertyPlantAndEquipment |
| 1482 |
2440402 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Impact of the Adoption of IFRS 9 on Financial Assets (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsImpactOfAdoptionOfIfrs9OnFinancialAssetsDetails |
| 1483 |
Disclosure of financial assets at date of initial application of IFRS 9 [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialAssetsAtDateOfInitialApplicationOfIFRS9Table |
| 1484 |
Categories of financial assets [axis] |
Axis |
|
|
ifrs-full:CategoriesOfFinancialAssetsAxis |
| 1485 |
Financial assets, category [member] |
Member |
|
|
ifrs-full:FinancialAssetsCategoryMember |
| 1486 |
Loans and receivables |
Member |
|
|
ifrs-full:LoansAndReceivablesCategoryMember |
| 1487 |
Amortized cost |
Member |
|
|
ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember |
| 1488 |
Fair value recognized in profit or loss |
Member |
|
|
ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember |
| 1489 |
Available-for-sale |
Member |
|
|
ifrs-full:FinancialAssetsAvailableforsaleCategoryMember |
| 1490 |
FVOCI |
Member |
|
|
ifrs-full:FinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeCategoryMember |
| 1491 |
Classes of financial assets [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialAssetsAxis |
| 1492 |
Financial assets, class [member] |
Member |
|
|
ifrs-full:FinancialAssetsMember |
| 1493 |
Trade accounts receivable and other |
Member |
|
|
mt:TradeAndOtherCurrentReceivablesMember |
| 1494 |
Trade accounts receivable and other subject to TSR programs |
Member |
|
|
mt:TradeAndOtherCurrentReceivablesSubjectToTSRProgramsMember |
| 1495 |
Cash and cash equivalents |
Member |
|
|
mt:CashAndCashEquivalents1Member |
| 1496 |
Restricted cash |
Member |
|
|
mt:RestrictedCashAndCashEquivalentsMember |
| 1497 |
Prepaid expenses and other current assets |
Member |
|
|
mt:CurrentPrepaymentsAndOtherCurrentAssetsMember |
| 1498 |
Derivatives |
Member |
|
|
mt:DerivativeFinancialAssetsCurrentMember |
| 1499 |
Other assets |
Member |
|
|
ifrs-full:OtherAssetsMember |
| 1500 |
Other investments |
Member |
|
|
mt:InvestmentsOtherThanInvestmentsAccountedForUsingEquityMethodMember |
| 1501 |
Derivatives |
Member |
|
|
mt:DerivativeFinancialAssetsNoncurrentMember |
| 1502 |
Disclosure of financial assets at date of initial application of IFRS 9 [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialAssetsAtDateOfInitialApplicationOfIFRS9LineItems |
| 1503 |
Original, Carrying amount |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:FinancialAssetsCarryingAmountImmediatelyBeforeInitialApplicationOfIFRS9 |
| 1504 |
New, Carrying amount |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:FinancialAssetsCarryingAmountImmediatelyAfterInitialApplicationOfIFRS9 |
| 1505 |
Change, Carrying amount |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IncreaseDecreaseInFinancialAssetsArisingFromChangeInMeasurementAttributeFirstApplicationOfIFRS9 |
| 1506 |
2440403 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Summary of Assets and Liabilities Based on Categories (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsSummaryOfAssetsAndLiabilitiesBasedOnCategoriesDetails |
| 1507 |
Disclosure of financial assets and liabilities [Table] |
Table |
* |
* |
mt:DisclosureOfFinancialAssetsAndLiabilitiesTable |
| 1508 |
Classes of assets [axis] |
Axis |
|
|
ifrs-full:ClassesOfAssetsAxis |
| 1509 |
Assets [member] |
Member |
|
|
ifrs-full:ClassesOfAssetsMember |
| 1510 |
Non-financial assets |
Member |
|
|
mt:NonFinancialAssetsMember |
| 1511 |
Financial assets |
Member |
|
|
mt:FinancialAssets1Member |
| 1512 |
Categories of financial assets [axis] |
Axis |
|
|
ifrs-full:CategoriesOfFinancialAssetsAxis |
| 1513 |
Financial assets, category [member] |
Member |
|
|
ifrs-full:FinancialAssetsCategoryMember |
| 1514 |
Assets at amortized cost |
Member |
|
|
ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember |
| 1515 |
Fair value recognized in profit or loss |
Member |
|
|
ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember |
| 1516 |
Fair value recognized in OCI |
Member |
|
|
ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember |
| 1517 |
Derivatives |
Member |
|
|
mt:DerivativesCategoryMember |
| 1518 |
Available-for-sale |
Member |
|
|
ifrs-full:FinancialAssetsAvailableforsaleCategoryMember |
| 1519 |
Classes of liabilities [axis] |
Axis |
|
|
ifrs-full:ClassesOfLiabilitiesAxis |
| 1520 |
Liabilities [member] |
Member |
|
|
ifrs-full:LiabilitiesMember |
| 1521 |
Non-financial liabilities |
Member |
|
|
mt:NonFinancialLiabilitiesMember |
| 1522 |
Financial liabilities |
Member |
|
|
mt:FinancialLiabilities1Member |
| 1523 |
Categories of financial liabilities [axis] |
Axis |
|
|
ifrs-full:CategoriesOfFinancialLiabilitiesAxis |
| 1524 |
Financial liabilities, category [member] |
Member |
|
|
ifrs-full:FinancialLiabilitiesCategoryMember |
| 1525 |
Liabilities at amortized cost |
Member |
|
|
ifrs-full:FinancialLiabilitiesAtAmortisedCostCategoryMember |
| 1526 |
Fair value recognized in profit or loss |
Member |
|
|
ifrs-full:FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember |
| 1527 |
Derivatives |
Member |
|
|
mt:DerivativesCategoryMember |
| 1528 |
Disclosure of financial assets and liabilities [Line Items] |
LineItems |
|
|
mt:DisclosureOfFinancialAssetsAndLiabilitiesLineItems |
| 1529 |
ASSETS |
Abstract |
|
|
ifrs-full:AssetsAbstract |
| 1530 |
Current assets: |
Abstract |
|
|
ifrs-full:CurrentAssetsAbstract |
| 1531 |
Cash and cash equivalents |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalents |
| 1532 |
Restricted cash |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:RestrictedCashAndCashEquivalents |
| 1533 |
Trade accounts receivable and other |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:TradeAndOtherCurrentReceivables |
| 1534 |
Inventories |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Inventories |
| 1535 |
Prepaid expenses and other current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentPrepaymentsAndOtherCurrentAssets |
| 1536 |
Assets held for sale |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners |
| 1537 |
Total current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentAssets |
| 1538 |
Non-current assets: |
Abstract |
|
|
ifrs-full:NoncurrentAssetsAbstract |
| 1539 |
Goodwill and intangible assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IntangibleAssetsAndGoodwill |
| 1540 |
Property, plant and equipment and biological assets |
Concept (Monetary) |
As Of |
Debit |
mt:PropertyPlantAndEquipmentAndBiologicalAssets |
| 1541 |
Investments in associates and joint ventures |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InvestmentAccountedForUsingEquityMethod |
| 1542 |
Other investments |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod |
| 1543 |
Deferred tax assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:DeferredTaxAssets |
| 1544 |
Other assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherAssets |
| 1545 |
Total non-current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentAssets |
| 1546 |
Total assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Assets |
| 1547 |
LIABILITIES AND EQUITY |
Abstract |
|
|
ifrs-full:EquityAndLiabilitiesAbstract |
| 1548 |
Current liabilities: |
Abstract |
|
|
ifrs-full:CurrentLiabilitiesAbstract |
| 1549 |
Short-term debt and current portion of long-term debt |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings |
| 1550 |
Trade accounts payable and other |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:TradeAndOtherCurrentPayables |
| 1551 |
Short-term provisions |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentProvisions |
| 1552 |
Accrued expenses and other liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentAccruedExpensesAndOtherCurrentLiabilities |
| 1553 |
Income tax liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentTaxLiabilitiesCurrent |
| 1554 |
Liabilities held for sale |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSale |
| 1555 |
Total current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentLiabilities |
| 1556 |
Non-current liabilities: |
Abstract |
|
|
ifrs-full:NoncurrentLiabilitiesAbstract |
| 1557 |
Long-term debt, net of current portion |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LongtermBorrowings |
| 1558 |
Deferred tax liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DeferredTaxLiabilities |
| 1559 |
Deferred employee benefits |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ProvisionsForEmployeeBenefits |
| 1560 |
Long-term provisions |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherLongtermProvisions |
| 1561 |
Other long-term obligations |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherNoncurrentLiabilities |
| 1562 |
Total non-current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentLiabilities |
| 1563 |
Equity: |
Abstract |
|
|
ifrs-full:EquityAbstract |
| 1564 |
Equity attributable to the equity holders of the parent |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:EquityAttributableToOwnersOfParent |
| 1565 |
Non-controlling interests |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncontrollingInterests |
| 1566 |
Total equity |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Equity |
| 1567 |
Total liabilities and equity |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:EquityAndLiabilities |
| 1568 |
2440404 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Schedule of Assets and Liabilities at Fair Value (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsScheduleOfAssetsAndLiabilitiesAtFairValueDetails |
| 1569 |
Disclosure of fair value measurement of assets [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFairValueMeasurementOfAssetsTable |
| 1570 |
Measurement [axis] |
Axis |
|
|
ifrs-full:MeasurementAxis |
| 1571 |
Aggregated measurement [member] |
Member |
|
|
ifrs-full:AggregatedMeasurementMember |
| 1572 |
Recurring fair value measurement |
Member |
|
|
ifrs-full:RecurringFairValueMeasurementMember |
| 1573 |
Classes of assets [axis] |
Axis |
|
|
ifrs-full:ClassesOfAssetsAxis |
| 1574 |
Assets [member] |
Member |
|
|
ifrs-full:ClassesOfAssetsMember |
| 1575 |
Investments in equity instruments at FVOCI |
Member |
|
|
ifrs-full:InvestmentsInEquityInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember |
| 1576 |
Trade accounts receivable and other subject to TSR programs |
Member |
|
|
mt:TradeAndOtherCurrentReceivablesSubjectToTSRProgramsMember |
| 1577 |
Available-for-sale |
Member |
|
|
ifrs-full:FinancialAssetsAvailableforsaleCategoryMember |
| 1578 |
Derivative financial current assets |
Member |
|
|
mt:DerivativeFinancialAssetsCurrentMember |
| 1579 |
Derivative financial non-current assets |
Member |
|
|
mt:DerivativeFinancialAssetsNoncurrentMember |
| 1580 |
Classes of liabilities [axis] |
Axis |
|
|
ifrs-full:ClassesOfLiabilitiesAxis |
| 1581 |
Liabilities [member] |
Member |
|
|
ifrs-full:LiabilitiesMember |
| 1582 |
Derivative financial current liabilities |
Member |
|
|
mt:DerivativefinancialliabilitiescurrentMember |
| 1583 |
Derivative financial non-current liabilities |
Member |
|
|
mt:DerivativefinancialliabilitiesnoncurrentMember |
| 1584 |
Levels of fair value hierarchy [axis] |
Axis |
|
|
ifrs-full:LevelsOfFairValueHierarchyAxis |
| 1585 |
All levels of fair value hierarchy [member] |
Member |
|
|
ifrs-full:AllLevelsOfFairValueHierarchyMember |
| 1586 |
Level 1 |
Member |
|
|
ifrs-full:Level1OfFairValueHierarchyMember |
| 1587 |
Level 2 |
Member |
|
|
ifrs-full:Level2OfFairValueHierarchyMember |
| 1588 |
Level 3 |
Member |
|
|
ifrs-full:Level3OfFairValueHierarchyMember |
| 1589 |
Disclosure of fair value measurement of assets [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFairValueMeasurementOfAssetsLineItems |
| 1590 |
Total assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Assets |
| 1591 |
Total liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Liabilities |
| 1592 |
2440405 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Gross Debt - Short-term Debt (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsGrossDebtShortTermDebtDetails |
| 1593 |
Disclosure of detailed information about borrowings [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable |
| 1594 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 1595 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 1596 |
Short-term bilateral credit facility |
Member |
|
|
mt:ShortTermBilateralCreditFacilitiesMember |
| 1597 |
Bilateral Term Loan |
Member |
|
|
mt:BilateralTermLoanMember |
| 1598 |
Credit Facility due April 30, 2019 |
Member |
|
|
mt:CreditFacilityDueApril302019Member |
| 1599 |
Short-term bank loan due various dates 2019 and 2020 |
Member |
|
|
mt:ShortTermBankLoanDueVariousDates2019And2020Member |
| 1600 |
Commercial paper |
Member |
|
|
mt:CommercialPaper1Member |
| 1601 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 1602 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 1603 |
Weighted average |
Member |
|
|
ifrs-full:WeightedAverageMember |
| 1604 |
Disclosure of detailed information about borrowings [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems |
| 1605 |
Short-term bank loans and other credit facilities including commercial paper |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ShorttermBorrowings |
| 1606 |
Current portion of long-term debt |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentPortionOfLongtermBorrowings |
| 1607 |
Lease obligations |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:GrossFinanceLeaseObligations |
| 1608 |
Total |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings |
| 1609 |
Short-term borrowings interest rate |
Concept (Percent) |
For Period |
|
mt:CurrentBorrowingsInterestRate |
| 1610 |
Undrawn borrowing facilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:UndrawnBorrowingFacilities |
| 1611 |
Borrowings |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Borrowings |
| 1612 |
Notional amount |
Concept (Monetary) |
As Of |
|
ifrs-full:NotionalAmount |
| 1613 |
Amount of potential borrowings |
Concept (Monetary) |
As Of |
Credit |
mt:BorrowingsMaximumCapacity |
| 1614 |
2440406 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Gross Debt - Long-term Debt (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsGrossDebtLongTermDebtDetails |
| 1615 |
Disclosure of detailed information about borrowings [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable |
| 1616 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 1617 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 1618 |
Americas |
Member |
|
|
srt:AmericasMember |
| 1619 |
Europe, Asia & Africa |
Member |
|
|
mt:EuropeAsiaAndAfricaMember |
| 1620 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 1621 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 1622 |
Long-term debt |
Member |
|
|
mt:LongTermBorrowingsIncludingCurrentPortionMember |
| 1623 |
Total long-term debt (excluding lease obligations) |
Member |
|
|
mt:LongTermDebtExcludingLeaseObligationMember |
| 1624 |
Corporate Borrowings |
Member |
|
|
mt:CorporateBorrowingsMember |
| 1625 |
5.5 billion Revolving Credit Facility |
Member |
|
|
mt:FivePointFiveBillionRevolvingCreditFacilityMember |
| 1626 |
€500 million Unsecured Notes, Due in 2018 |
Member |
|
|
mt:FiveHundredMillionEURUnsecuredNotesDue2018Member |
| 1627 |
€400 million Unsecured Notes, Due in 2018 |
Member |
|
|
mt:FourHundredMillionEURUnsecuredNotesDue2018Member |
| 1628 |
€750 million Unsecured Notes, Due in 2019 |
Member |
|
|
mt:SevenHundredFiftyMillionEURUnsecuredNotesDue2019Member |
| 1629 |
500 million Unsecured Notes, Due in 2020 |
Member |
|
|
mt:FiveHundredMillionUnsecuredNotesDue2020Member |
| 1630 |
CHF 225 million Unsecured Notes, Due in 2020 |
Member |
|
|
mt:TwoHundredTwentyFiveMillionCHFUnsecuredNotesDue2020Member |
| 1631 |
€600 million Unsecured Notes, Due in 2020 |
Member |
|
|
mt:SixHundredMillionEURUnsecuredNotesDue2020Member |
| 1632 |
1.0 billion Unsecured Bonds, Due in 2020 |
Member |
|
|
mt:OneBillionUnsecuredBondsDue2020Member |
| 1633 |
1.5 billion Unsecured Notes, Due in 2021 |
Member |
|
|
mt:OnePointFiveBillionUnsecuredNotesDue2021Member |
| 1634 |
€500 million Unsecured Notes, Due in 2021 |
Member |
|
|
mt:FiveHundredMillionEURUnsecuredNotesDue2021Member |
| 1635 |
€750 million Unsecured Notes, Due in 2022 |
Member |
|
|
mt:SevenHundredFiftyMillionEURUnsecuredNotesDue2022Member |
| 1636 |
1.1 billion Unsecured Notes, Due in 2022 |
Member |
|
|
mt:OnePointOneBillionUnsecuredNotesDue2022Member |
| 1637 |
€500 million Unsecured Notes, Due in 2023 |
Member |
|
|
mt:FiveHundredMillionEURUnsecuredNotesDue2025Member |
| 1638 |
500 million Unsecured Notes, Due in 2025 |
Member |
|
|
mt:FiveHundredMillionUnsecuredNotesDue2025Member |
| 1639 |
1.5 billion Unsecured Bonds, Due in 2039 |
Member |
|
|
mt:OnePointFiveBillionUnsecuredBondsDue2039Member |
| 1640 |
1.0 billion Unsecured Notes, Due in 2041 |
Member |
|
|
mt:OneBillionUnsecuredNotesDue2041Member |
| 1641 |
Other Loans, Due in 2019-2021 |
Member |
|
|
mt:OtherLoansDue20192021Member |
| 1642 |
EIB loan, Due in 2025 |
Member |
|
|
mt:EIBLoanDue2025Member |
| 1643 |
7 billion Term Facility, Due 2020 |
Member |
|
|
mt:SevenBillionTermFacilityDue2020Member |
| 1644 |
Other Loans, Due in 2019-2035 |
Member |
|
|
mt:OtherLoansDue20192035Member |
| 1645 |
Other Loans, Fixed/Floating, Due in 2019-2025 |
Member |
|
|
mt:OtherLoansFixedFloatingDue20192025Member |
| 1646 |
EBRD Facility, Floating, Due in 2024 |
Member |
|
|
mt:EBRDFacilityFloatingDueIn2024Member |
| 1647 |
Other Loans, Fixed/Floating, Due in 2019-2027 |
Member |
|
|
mt:OtherLoansFixedFloatingDue20192027Member |
| 1648 |
Lease obligations |
Member |
|
|
mt:FinanceLeaseObligationsMember |
| 1649 |
Types of interest rates [axis] |
Axis |
|
|
ifrs-full:TypesOfInterestRatesAxis |
| 1650 |
Interest rate types [member] |
Member |
|
|
ifrs-full:InterestRateTypesMember |
| 1651 |
Fixed interest rate |
Member |
|
|
ifrs-full:FixedInterestRateMember |
| 1652 |
Floating interest rate |
Member |
|
|
ifrs-full:FloatingInterestRateMember |
| 1653 |
Fixed/Floating interest rates |
Member |
|
|
mt:FixedFloatingInterestRatesMember |
| 1654 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 1655 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 1656 |
Bottom of range |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 1657 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 1658 |
Disclosure of detailed information about borrowings [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems |
| 1659 |
Notional amount |
Concept (Monetary) |
As Of |
|
ifrs-full:NotionalAmount |
| 1660 |
Borrowings, interest rate |
Concept (Percent) |
As Of |
|
ifrs-full:BorrowingsInterestRate |
| 1661 |
Borrowings |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Borrowings |
| 1662 |
Less current portion of long-term debt |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentPortionOfLongtermBorrowings |
| 1663 |
Total long-term debt, net of current portion |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LongtermBorrowings |
| 1664 |
2440407 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Gross Debt - Long-Term Debt, Corporate (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsGrossDebtLongTermDebtCorporateDetails |
| 1665 |
Disclosure of detailed information about borrowings [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable |
| 1666 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 1667 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 1668 |
€750 million Unsecured Notes, Due in 2024 |
Member |
|
|
mt:SevenHundredFiftyMillionEURUnsecuredNotesDue2024Member |
| 1669 |
€750 million Unsecured Notes, Due in 2022 |
Member |
|
|
mt:SevenHundredFiftyMillionEURUnsecuredNotesDue2022Member |
| 1670 |
5.5 billion Revolving Credit Facility |
Member |
|
|
mt:FivePointFiveBillionRevolvingCreditFacilityMember |
| 1671 |
Disclosure of detailed information about borrowings [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems |
| 1672 |
Notional amount |
Concept (Monetary) |
As Of |
|
ifrs-full:NotionalAmount |
| 1673 |
Borrowings, interest rate |
Concept (Percent) |
As Of |
|
ifrs-full:BorrowingsInterestRate |
| 1674 |
Line of credit, maximum borrowing capacity |
Concept (Monetary) |
As Of |
Credit |
mt:LineOfCreditFacilityMaximumBorrowingCapacity1 |
| 1675 |
Undrawn borrowing facilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:UndrawnBorrowingFacilities |
| 1676 |
2440408 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Gross Debt - Long-Term Debt, Bonds (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsGrossDebtLongTermDebtBondsDetails |
| 1677 |
Disclosure of detailed information about borrowings [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable |
| 1678 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 1679 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 1680 |
500 million Unsecured Notes, Due in 2020 |
Member |
|
|
mt:FiveHundredMillionUnsecuredNotesDue2020Member |
| 1681 |
€400 million Unsecured Notes, Due in 2018 |
Member |
|
|
mt:FourHundredMillionEURUnsecuredNotesDue2018Member |
| 1682 |
USD 2041 Notes |
Member |
|
|
mt:USD2041NotesMember |
| 1683 |
USD 2039 Notes |
Member |
|
|
mt:USD2039NotesMember |
| 1684 |
Euro Medium Term Notes Program |
Member |
|
|
mt:EuroMediumTermNotesProgrammeMember |
| 1685 |
€750 million Unsecured Notes, Due in 2024 |
Member |
|
|
mt:SevenHundredFiftyMillionEURUnsecuredNotesDue2024Member |
| 1686 |
Types of interest rates [axis] |
Axis |
|
|
ifrs-full:TypesOfInterestRatesAxis |
| 1687 |
Interest rate types [member] |
Member |
|
|
ifrs-full:InterestRateTypesMember |
| 1688 |
Fixed interest rate |
Member |
|
|
ifrs-full:FixedInterestRateMember |
| 1689 |
Disclosure of detailed information about borrowings [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems |
| 1690 |
Repayments of bonds, notes and debentures |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RepaymentsOfBondsNotesAndDebentures |
| 1691 |
Amount of potential borrowings |
Concept (Monetary) |
As Of |
Credit |
mt:BorrowingsMaximumCapacity |
| 1692 |
Borrowings, interest rate |
Concept (Percent) |
As Of |
|
ifrs-full:BorrowingsInterestRate |
| 1693 |
Extinguishment of debt, amount |
Concept (Monetary) |
As Of |
Debit |
mt:ExtinguishmentOfDebtAmount1 |
| 1694 |
Repayments of non-current borrowings |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RepaymentsOfNoncurrentBorrowings |
| 1695 |
Borrowings |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Borrowings |
| 1696 |
Premiums and other fees |
Concept (Monetary) |
For Period |
Debit |
mt:NetFinancingCostsPremiumsAndOtherFees |
| 1697 |
Notional amount |
Concept (Monetary) |
As Of |
|
ifrs-full:NotionalAmount |
| 1698 |
2440409 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Gross Debt - Interest Rate "Step-Up" and Narrative (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsGrossDebtInterestRateStepUpAndNarrativeDetails |
| 1699 |
Disclosure of detailed information about borrowings [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable |
| 1700 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 1701 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 1702 |
€750 million Unsecured Notes, Due in 2019 |
Member |
|
|
mt:SevenHundredFiftyMillionEURUnsecuredNotesDue2019Member |
| 1703 |
500 million Unsecured Notes, Due in 2020 |
Member |
|
|
mt:FiveHundredMillionUnsecuredNotesDue2020Member |
| 1704 |
CHF 225 million Unsecured Notes, Due in 2020 |
Member |
|
|
mt:TwoHundredTwentyFiveMillionCHFUnsecuredNotesDue2020Member |
| 1705 |
€600 million Unsecured Notes, Due in 2020 |
Member |
|
|
mt:SixHundredMillionEURUnsecuredNotesDue2020Member |
| 1706 |
1.0 billion Unsecured Bonds, Due in 2020 |
Member |
|
|
mt:OneBillionUnsecuredBondsDue2020Member |
| 1707 |
1.5 billion Unsecured Notes, Due in 2021 |
Member |
|
|
mt:OnePointFiveBillionUnsecuredNotesDue2021Member |
| 1708 |
€500 million Unsecured Notes, Due in 2021 |
Member |
|
|
mt:FiveHundredMillionEURUnsecuredNotesDue2021Member |
| 1709 |
€750 million Unsecured Notes, Due in 2022 |
Member |
|
|
mt:SevenHundredFiftyMillionEURUnsecuredNotesDue2022Member |
| 1710 |
1.1 billion Unsecured Notes, Due in 2022 |
Member |
|
|
mt:OnePointOneBillionUnsecuredNotesDue2022Member |
| 1711 |
€500 million Unsecured Notes, Due in 2023 |
Member |
|
|
mt:FiveHundredMillionEURUnsecuredNotesDue2025Member |
| 1712 |
500 million Unsecured Notes, Due in 2025 |
Member |
|
|
mt:FiveHundredMillionUnsecuredNotesDue2025Member |
| 1713 |
1.0 billion Unsecured Bonds, Due 2039 |
Member |
|
|
mt:OneBillionUnsecuredBondsDue2039Member |
| 1714 |
500 million Unsecured Bonds, Due 2039 |
Member |
|
|
mt:FiveHundredMillionUnsecuredBondsDue2039Member |
| 1715 |
1.0 billion Unsecured Notes, Due in 2041 |
Member |
|
|
mt:OneBillionUnsecuredNotesDue2041Member |
| 1716 |
EIB loan |
Member |
|
|
mt:EIBLoanDue2025Member |
| 1717 |
7 billion Term Facility, Due 2020 |
Member |
|
|
mt:SevenBillionTermFacilityDue2020Member |
| 1718 |
5.5 billion Revolving Credit Facility |
Member |
|
|
mt:FivePointFiveBillionRevolvingCreditFacilityMember |
| 1719 |
300 EUR Million Variable Rate Loan |
Member |
|
|
mt:ThreeHundredEURMillionVariableRateLoanMember |
| 1720 |
1 Billion Senior Secured Asset-Based Revolving Credit Facility |
Member |
|
|
mt:OneBillionSeniorSecuredAssetBasedRevolvingCreditFacilityMember |
| 1721 |
European Bank for Reconstruction and Development |
Member |
|
|
mt:EuropeanBankforReconstructionandDevelopmentMember |
| 1722 |
4.5 Billion ZAR Revolving Borrowing Base Finance Facility, Due in 2020 |
Member |
|
|
mt:FourPointFiveBillionSouthAfricaRandRevolvingBorrowingBaseFinanceFacilityDueIn2020Member |
| 1723 |
Types of hedges [axis] |
Axis |
|
|
ifrs-full:TypesOfHedgesAxis |
| 1724 |
Hedges [member] |
Member |
|
|
ifrs-full:TypesOfHedgesMember |
| 1725 |
Net investment hedge |
Member |
|
|
ifrs-full:HedgesOfNetInvestmentInForeignOperationsMember |
| 1726 |
Types of interest rates [axis] |
Axis |
|
|
ifrs-full:TypesOfInterestRatesAxis |
| 1727 |
Interest rate types [member] |
Member |
|
|
ifrs-full:InterestRateTypesMember |
| 1728 |
Fixed interest rate |
Member |
|
|
ifrs-full:FixedInterestRateMember |
| 1729 |
Floating interest rate |
Member |
|
|
ifrs-full:FloatingInterestRateMember |
| 1730 |
Legal Entity [Axis] |
Axis |
|
|
dei:LegalEntityAxis |
| 1731 |
Entity [Domain] |
Member |
|
|
dei:EntityDomain |
| 1732 |
PJSC ArcelorMittal Kryvyi Rih |
Member |
|
|
mt:PJSCArcelorMittalKryvyiRihMember |
| 1733 |
ArcelorMittal South Africa Ltd. (AMSA) |
Member |
|
|
mt:ArcelorMittalSouthAfricaLtd.Member |
| 1734 |
Disclosure of detailed information about borrowings [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems |
| 1735 |
Notional amount |
Concept (Monetary) |
As Of |
|
ifrs-full:NotionalAmount |
| 1736 |
Debt instrument, term |
Concept (xbrli:durationItemType) |
For Period |
|
mt:DebtInstrumentTerm1 |
| 1737 |
Debt instrument, term, option to extend |
Concept (xbrli:durationItemType) |
For Period |
|
mt:DebtInstrumentTermOptionToExtend |
| 1738 |
Mandatory prepayment threshold, minimum |
Concept (Monetary) |
As Of |
Credit |
mt:DebtInstrumentMandatoryPrepaymentThresholdMinimum |
| 1739 |
Borrowings, interest rate |
Concept (Percent) |
As Of |
|
ifrs-full:BorrowingsInterestRate |
| 1740 |
Borrowings issuance price percentage |
Concept (Percent) |
As Of |
|
mt:BorrowingsIssuancePricePercentage |
| 1741 |
Amount of potential borrowings |
Concept (Monetary) |
As Of |
Credit |
mt:BorrowingsMaximumCapacity |
| 1742 |
Borrowings |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Borrowings |
| 1743 |
Line of credit, maximum borrowing capacity |
Concept (Monetary) |
As Of |
Credit |
mt:LineOfCreditFacilityMaximumBorrowingCapacity1 |
| 1744 |
Uncommitted amount |
Concept (Monetary) |
As Of |
Credit |
mt:NotionalAmountUncommittedAmount |
| 1745 |
Hedging instrument, liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:HedgingInstrumentLiabilities |
| 1746 |
Hedged item, assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:HedgedItemAssets |
| 1747 |
Gains on hedges of net investments in foreign operations, net of tax |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax |
| 1748 |
2440410 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Gross Debt - Maturities (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsGrossDebtMaturitiesDetails |
| 1749 |
Disclosure of detailed information about borrowings [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable |
| 1750 |
Maturity [axis] |
Axis |
|
|
ifrs-full:MaturityAxis |
| 1751 |
Aggregated time bands [member] |
Member |
|
|
ifrs-full:AggregatedTimeBandsMember |
| 1752 |
2019 |
Member |
|
|
ifrs-full:NotLaterThanOneYearMember |
| 1753 |
2020 |
Member |
|
|
ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember |
| 1754 |
2021 |
Member |
|
|
ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember |
| 1755 |
2022 |
Member |
|
|
ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember |
| 1756 |
2023 |
Member |
|
|
ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember |
| 1757 |
Subsequent years |
Member |
|
|
ifrs-full:LaterThanFiveYearsMember |
| 1758 |
Disclosure of detailed information about borrowings [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems |
| 1759 |
Borrowings |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Borrowings |
| 1760 |
2440411 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Gross Debt - Carrying Value and Fair Value (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsGrossDebtCarryingValueAndFairValueDetails |
| 1761 |
Disclosure of financial liabilities [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialLiabilitiesTable |
| 1762 |
Levels of fair value hierarchy [axis] |
Axis |
|
|
ifrs-full:LevelsOfFairValueHierarchyAxis |
| 1763 |
All levels of fair value hierarchy [member] |
Member |
|
|
ifrs-full:AllLevelsOfFairValueHierarchyMember |
| 1764 |
Level 1 |
Member |
|
|
ifrs-full:Level1OfFairValueHierarchyMember |
| 1765 |
Level 2 |
Member |
|
|
ifrs-full:Level2OfFairValueHierarchyMember |
| 1766 |
Level 3 |
Member |
|
|
ifrs-full:Level3OfFairValueHierarchyMember |
| 1767 |
Types of interest rates [axis] |
Axis |
|
|
ifrs-full:TypesOfInterestRatesAxis |
| 1768 |
Interest rate types [member] |
Member |
|
|
ifrs-full:InterestRateTypesMember |
| 1769 |
Fixed interest rate |
Member |
|
|
ifrs-full:FixedInterestRateMember |
| 1770 |
Floating interest rate |
Member |
|
|
ifrs-full:FloatingInterestRateMember |
| 1771 |
Classes of financial liabilities [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialLiabilitiesAxis |
| 1772 |
Financial liabilities, class [member] |
Member |
|
|
ifrs-full:FinancialLiabilitiesMember |
| 1773 |
Long-term debt |
Member |
|
|
mt:LongTermBorrowingsIncludingCurrentPortionMember |
| 1774 |
Short-term debt |
Member |
|
|
mt:CurrentBorrowingsMember |
| 1775 |
Disclosure of financial liabilities [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialLiabilitiesLineItems |
| 1776 |
Carrying Amount |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:FinancialLiabilities |
| 1777 |
Estimated Fair Value |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:FinancialLiabilitiesAtFairValue |
| 1778 |
2440412 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Schedule of Cash and Cash Equivalents and Restricted Cash (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsScheduleOfCashAndCashEquivalentsAndRestrictedCashDetails |
| 1779 |
Entities [Table] |
Table |
* |
* |
dei:EntitiesTable |
| 1780 |
Legal Entity [Axis] |
Axis |
|
|
dei:LegalEntityAxis |
| 1781 |
Entity [Domain] |
Member |
|
|
dei:EntityDomain |
| 1782 |
ArcelorMittal South Africa Ltd. (AMSA) |
Member |
|
|
mt:ArcelorMittalSouthAfricaLtd.Member |
| 1783 |
Entity Information [Line Items] |
LineItems |
|
|
dei:EntityInformationLineItems |
| 1784 |
Cash at bank |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:BalancesWithBanks |
| 1785 |
Term deposits |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents |
| 1786 |
Money market funds |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:ShorttermInvestmentsClassifiedAsCashEquivalents |
| 1787 |
Total |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalents |
| 1788 |
Restricted cash |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:RestrictedCashAndCashEquivalents |
| 1789 |
Cash deposit in connection with various environmental obligations and true sales of receivable programs |
Concept (Monetary) |
As Of |
Debit |
mt:CashDepositVariousEnvironmentalObligationsandTrueSalesofReceivablePrograms |
| 1790 |
Cash deposit in connection with the mandatory convertible bonds |
Concept (Monetary) |
As Of |
Debit |
mt:CashDepositMandatoryConvertibleBonds |
| 1791 |
2440413 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Reconciliation of Liabilities Arising from Financing Activities (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsReconciliationOfLiabilitiesArisingFromFinancingActivitiesDetails |
| 1792 |
Disclosure of reconciliation of liabilities arising from financing activities [table] |
Table |
* |
* |
ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesTable |
| 1793 |
Liabilities arising from financing activities [axis] |
Axis |
|
|
ifrs-full:LiabilitiesArisingFromFinancingActivitiesAxis |
| 1794 |
Liabilities arising from financing activities [member] |
Member |
|
|
ifrs-full:LiabilitiesArisingFromFinancingActivitiesMember |
| 1795 |
Long-term debt, net of current portion |
Member |
|
|
ifrs-full:LongtermBorrowingsMember |
| 1796 |
Short-term debt and current portion of long term debt |
Member |
|
|
ifrs-full:ShorttermBorrowingsMember |
| 1797 |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems |
| 1798 |
Changes in liabilities arising from financing activities [abstract] |
Abstract |
|
|
ifrs-full:ChangesInLiabilitiesArisingFromFinancingActivitiesAbstract |
| 1799 |
Liabilities arising from financing activities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilitiesArisingFromFinancingActivities |
| 1800 |
Proceeds from long-term debt |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromNoncurrentBorrowings |
| 1801 |
Payments of long-term debt |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RepaymentsOfNoncurrentBorrowings |
| 1802 |
Amortized cost |
Concept (Monetary) |
For Period |
Credit |
mt:IncreaseDecreaseThroughAmortizedCostLiabilitiesArisingFromFinancingActivities |
| 1803 |
Unrealized foreign exchange effects |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities |
| 1804 |
Proceeds from short-term debt |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromCurrentBorrowings |
| 1805 |
Payments of short-term debt |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RepaymentsOfCurrentBorrowings |
| 1806 |
Current portion of long-term debt |
Concept (Monetary) |
For Period |
Credit |
mt:IncreaseDecreaseThroughTransferLiabilitiesArisingFromFinancingActivities |
| 1807 |
Debt acquired through business combinations |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughObtainingOrLosingControlOfSubsidiariesOrOtherBusinessesLiabilitiesArisingFromFinancingActivities |
| 1808 |
Debt classified as held for sale (2.3.2) |
Concept (Monetary) |
For Period |
Credit |
mt:IncreaseDecreaseThroughDebtClassifiedAsHeldForSaleLiabilitiesArisingFromFinancingActivities |
| 1809 |
Other movements |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities |
| 1810 |
Liabilities arising from financing activities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilitiesArisingFromFinancingActivities |
| 1811 |
2440414 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Net Debt (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsNetDebtDetails |
| 1812 |
Disclosure of detailed information about financial instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialInstrumentsTable |
| 1813 |
Currency [Axis] |
Axis |
|
|
srt:CurrencyAxis |
| 1814 |
All Currencies [Domain] |
Member |
|
|
currency:AllCurrenciesDomain |
| 1815 |
EUR |
Member |
|
|
currency:EUR |
| 1816 |
USD |
Member |
|
|
currency:USD |
| 1817 |
CHF |
Member |
|
|
currency:CHF |
| 1818 |
ZAR |
Member |
|
|
currency:ZAR |
| 1819 |
INR |
Member |
|
|
currency:INR |
| 1820 |
CAD |
Member |
|
|
currency:CAD |
| 1821 |
Other (in USD) |
Member |
|
|
mt:OtherCurrenciesMember |
| 1822 |
Disclosure of detailed information about financial instruments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialInstrumentsLineItems |
| 1823 |
Short-term debt and current portion of long-term debt |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings |
| 1824 |
Long-term debt, net of current portion |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LongtermBorrowings |
| 1825 |
Cash and cash equivalents including restricted cash |
Concept (Monetary) |
As Of |
Debit |
mt:CashAndCashEquivalentsAndRestrictedCashAndCashEquivalents |
| 1826 |
Net debt |
Concept (Monetary) |
As Of |
Credit |
mt:NetDebtExcludingPortionIncludedInDisposalGroupsClassifiedAsHeldForSale |
| 1827 |
2440415 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Derivative Financial Instruments - Classified as Level 2 (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsDerivativeFinancialInstrumentsClassifiedAsLevel2Details |
| 1828 |
Disclosure of detailed information about financial instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialInstrumentsTable |
| 1829 |
Classes of financial instruments [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialInstrumentsAxis |
| 1830 |
Financial instruments, class [member] |
Member |
|
|
ifrs-full:ClassesOfFinancialInstrumentsMember |
| 1831 |
Interest rate swaps - fixed rate borrowing/loans |
Member |
|
|
ifrs-full:InterestRateSwapContractMember |
| 1832 |
Total foreign exchange rate instruments |
Member |
|
|
mt:ForeignExchangeRateInstrumentsMember |
| 1833 |
Forward purchase contracts |
Member |
|
|
mt:ForwardPurchaseContractMember |
| 1834 |
Forward sale contracts |
Member |
|
|
mt:ForwardSalesContractMember |
| 1835 |
Currency swaps purchases |
Member |
|
|
mt:CurrencySwapPurchasesMember |
| 1836 |
Currency swaps sales |
Member |
|
|
mt:CurrencySwapSalesMember |
| 1837 |
Exchange option purchases |
Member |
|
|
mt:ExchangeOptionPurchasesMember |
| 1838 |
Exchange options sales |
Member |
|
|
mt:ExchangeOptionSalesMember |
| 1839 |
Total raw materials (base metals), freight, energy, emission rights |
Member |
|
|
mt:RawMaterialsFreightEnergyEmissionRightsMember |
| 1840 |
Term contracts sales |
Member |
|
|
mt:TermContractsSalesMember |
| 1841 |
Term contracts purchases |
Member |
|
|
mt:TermContractsPurchasesMember |
| 1842 |
Option sales/purchases |
Member |
|
|
mt:OptionsSalesPurchasesMember |
| 1843 |
Levels of fair value hierarchy [axis] |
Axis |
|
|
ifrs-full:LevelsOfFairValueHierarchyAxis |
| 1844 |
All levels of fair value hierarchy [member] |
Member |
|
|
ifrs-full:AllLevelsOfFairValueHierarchyMember |
| 1845 |
Level 2 |
Member |
|
|
ifrs-full:Level2OfFairValueHierarchyMember |
| 1846 |
Disclosure of detailed information about financial instruments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialInstrumentsLineItems |
| 1847 |
Derivative asset, notional amount |
Concept (Monetary) |
As Of |
Debit |
mt:DerivativeFinancialAssetsNotionalAmount1 |
| 1848 |
Derivative assets, fair value |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:DerivativeFinancialAssets |
| 1849 |
Derivative assets, average rate |
Concept (Percent) |
As Of |
|
mt:DerivativeFinancialAssetsAverageRate |
| 1850 |
Derivative liabilities, notional amount |
Concept (Monetary) |
As Of |
Credit |
mt:DerivativeLiabilityNotionalAmount1 |
| 1851 |
Derivative liabilities, fair value |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DerivativeFinancialLiabilities |
| 1852 |
Derivative liabilities, average rate |
Concept (Percent) |
As Of |
|
mt:DerivativeFinancialLiabilitiesAverageRate |
| 1853 |
2440416 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Derivative Financial Instruments - Classified as Level 3 (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsDerivativeFinancialInstrumentsClassifiedAsLevel3Details |
| 1854 |
Disclosure of detailed information about financial instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialInstrumentsTable |
| 1855 |
Valuation techniques used in fair value measurement [axis] |
Axis |
|
|
ifrs-full:ValuationTechniquesUsedInFairValueMeasurementAxis |
| 1856 |
Valuation techniques [member] |
Member |
|
|
ifrs-full:ValuationTechniquesMember |
| 1857 |
Stock market price movement |
Member |
|
|
ifrs-full:MatrixPricingMember |
| 1858 |
Business combinations [axis] |
Axis |
|
|
ifrs-full:BusinessCombinationsAxis |
| 1859 |
Entity's total for business combinations [member] |
Member |
|
|
ifrs-full:EntitysTotalForBusinessCombinationsMember |
| 1860 |
ISP |
Member |
|
|
mt:IntesaSanPaoloS.p.A.Member |
| 1861 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 1862 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 1863 |
Mandatorily convertible unsecured unsubordinated bonds |
Member |
|
|
mt:MandatorilyConvertibleUnsecuredUnsubordinatedBondsMember |
| 1864 |
Levels of fair value hierarchy [axis] |
Axis |
|
|
ifrs-full:LevelsOfFairValueHierarchyAxis |
| 1865 |
All levels of fair value hierarchy [member] |
Member |
|
|
ifrs-full:AllLevelsOfFairValueHierarchyMember |
| 1866 |
Level 3 |
Member |
|
|
ifrs-full:Level3OfFairValueHierarchyMember |
| 1867 |
Classes of financial instruments [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialInstrumentsAxis |
| 1868 |
Financial instruments, class [member] |
Member |
|
|
ifrs-full:ClassesOfFinancialInstrumentsMember |
| 1869 |
Put option with ISP1 |
Member |
|
|
ifrs-full:WrittenPutOptionsMember |
| 1870 |
Call option on 1,000 mandatory convertible bonds |
Member |
|
|
mt:CallOption1Member |
| 1871 |
Special payment in pellet purchase agreement |
Member |
|
|
mt:SpecialPaymentInPelletPurchasesAndSaleAgreementMember |
| 1872 |
Disclosure of detailed information about financial instruments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialInstrumentsLineItems |
| 1873 |
Notional amount |
Concept (Monetary) |
As Of |
|
ifrs-full:NotionalAmount |
| 1874 |
Spot price |
Concept (Decimal) |
For Period |
|
mt:SpotPriceSignificantUnobservableInputsAssets |
| 1875 |
Volatility percentage |
Concept (Percent) |
For Period |
|
ifrs-full:HistoricalVolatilityForSharesSignificantUnobservableInputsAssets |
| 1876 |
Increase in fair value measurement, percentage, due to a 10% increase in unobservable input |
Concept (Percent) |
As Of |
|
mt:IncreaseinFairValueMeasurementPercentageDueToA10IncreaseInUnobservableInput |
| 1877 |
Decrease in fair value measurement, percentage, due to a 10% decrease in unobservable input |
Concept (Percent) |
As Of |
|
mt:DecreaseinFairValueMeasurementPercentageDueToA10DecreaseInUnobservableInput |
| 1878 |
Fair value measurement, steel price (USD per metric ton) |
Concept (Monetary) |
For Period |
Debit |
mt:FairValueMeasurementSteelPricePerMetricTon |
| 1879 |
Business combination, equity contribution, present value at acquisition date |
Concept (Monetary) |
As Of |
Debit |
mt:BusinessCombinationEquityContributionPresentValueAtAcquisitionDate |
| 1880 |
Reconciliation of changes in fair value measurement, liabilities [abstract] |
Abstract |
|
|
ifrs-full:ReconciliationOfChangesInFairValueMeasurementLiabilitiesAbstract |
| 1881 |
Beginning of period, liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Liabilities |
| 1882 |
Change in fair value |
Concept (Monetary) |
For Period |
|
ifrs-full:GainsLossesRecognisedInProfitOrLossFairValueMeasurementLiabilities |
| 1883 |
End of period, liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Liabilities |
| 1884 |
Reconciliation of changes in fair value measurement, assets [abstract] |
Abstract |
|
|
ifrs-full:ReconciliationOfChangesInFairValueMeasurementAssetsAbstract |
| 1885 |
Beginning of period, assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Assets |
| 1886 |
Change in fair value |
Concept (Monetary) |
For Period |
|
ifrs-full:GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssets |
| 1887 |
End of period, assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Assets |
| 1888 |
Reconciliation Of Changes In Fair Value Measurement, Assets (Liabilities) [Abstract] |
Abstract |
|
|
mt:ReconciliationOfChangesInFairValueMeasurementAssetsLiabilitiesAbstract |
| 1889 |
Beginning of period, assets (liabilities) |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NetAssetsLiabilities |
| 1890 |
Change in fair value |
Concept (Monetary) |
For Period |
Credit |
mt:GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssetsLiabilities |
| 1891 |
End of period, assets (liabilities) |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NetAssetsLiabilities |
| 1892 |
2440417 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Financing Costs (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsFinancingCostsDetails |
| 1893 |
Disclosure of detailed information about borrowings [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable |
| 1894 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 1895 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 1896 |
Mandatorily convertible unsecured unsubordinated bonds |
Member |
|
|
mt:MandatorilyConvertibleUnsecuredUnsubordinatedBondsMember |
| 1897 |
Types of interest rates [axis] |
Axis |
|
|
ifrs-full:TypesOfInterestRatesAxis |
| 1898 |
Interest rate types [member] |
Member |
|
|
ifrs-full:InterestRateTypesMember |
| 1899 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 1900 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 1901 |
Disclosure of detailed information about borrowings [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems |
| 1902 |
Interest expense |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:InterestExpense |
| 1903 |
Interest income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromInterest |
| 1904 |
Change in fair value adjustment on call option on mandatory convertible bonds and pellet purchase agreement (note 6.1.5) |
Concept (Monetary) |
For Period |
Credit |
mt:ChangeInFairValueAdjustmentOnCallOptionsOnMandatorilyConvertibleBonds |
| 1905 |
Accretion of defined benefit obligations and other long term liabilities |
Concept (Monetary) |
For Period |
Debit |
mt:AccretionofDefinedBenefitObligationsandOtherLongTermLiabilities |
| 1906 |
Net foreign exchange result |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss |
| 1907 |
Other |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:OtherFinanceCost |
| 1908 |
Total |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:FinanceIncomeCost |
| 1909 |
Premiums and fees for bonds early redeemed |
Concept (Monetary) |
For Period |
Debit |
mt:PremiumsandFeesforBondsEarlyRedeemed |
| 1910 |
Finance costs |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:FinanceCosts |
| 1911 |
2440418 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Risk management policy - Capital Management (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsRiskManagementPolicyCapitalManagementDetails |
| 1912 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1913 |
Financial Instruments [Abstract] |
Abstract |
|
|
mt:FinancialInstrumentsAbstract |
| 1914 |
Total equity |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Equity |
| 1915 |
Net debt (including 67 cash and debt classified as held for sale as of December 31, 2018) |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NetDebt |
| 1916 |
Gearing |
Concept (Percent) |
As Of |
|
mt:CapitalManagementGearingPercentage |
| 1917 |
Net debt classified as held for sale |
Concept (Monetary) |
As Of |
Credit |
mt:NetDebtIncludedInDisposalGroupsClassifiedAsHeldForSale |
| 1918 |
2440419 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Risk management policy - Interest Rate Risk (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsRiskManagementPolicyInterestRateRiskDetails |
| 1919 |
Disclosure of nature and extent of risks arising from financial instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable |
| 1920 |
Types of interest rates [axis] |
Axis |
|
|
ifrs-full:TypesOfInterestRatesAxis |
| 1921 |
Interest rate types [member] |
Member |
|
|
ifrs-full:InterestRateTypesMember |
| 1922 |
Fixed interest rate |
Member |
|
|
ifrs-full:FixedInterestRateMember |
| 1923 |
Floating interest rate |
Member |
|
|
ifrs-full:FloatingInterestRateMember |
| 1924 |
Types of risks [axis] |
Axis |
|
|
ifrs-full:TypesOfRisksAxis |
| 1925 |
Risks [member] |
Member |
|
|
ifrs-full:TypesOfRisksMember |
| 1926 |
Interest rate risk |
Member |
|
|
ifrs-full:InterestRateRiskMember |
| 1927 |
Disclosure of nature and extent of risks arising from financial instruments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems |
| 1928 |
Risk exposure associated with instruments sharing characteristic, concentration percentage |
Concept (Percent) |
As Of |
|
mt:RiskExposureAssociatedWithInstrumentsSharingCharacteristicConcentrationPercentage |
| 1929 |
2440420 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Risk management policy - Foreign Exchange Rate Risk (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsRiskManagementPolicyForeignExchangeRateRiskDetails |
| 1930 |
Disclosure of nature and extent of risks arising from financial instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable |
| 1931 |
Types of hedges [axis] |
Axis |
|
|
ifrs-full:TypesOfHedgesAxis |
| 1932 |
Hedges [member] |
Member |
|
|
ifrs-full:TypesOfHedgesMember |
| 1933 |
Net investment hedge |
Member |
|
|
ifrs-full:HedgesOfNetInvestmentInForeignOperationsMember |
| 1934 |
Hedging instruments [axis] |
Axis |
|
|
ifrs-full:HedgingInstrumentsAxis |
| 1935 |
Hedging instruments [member] |
Member |
|
|
ifrs-full:HedgingInstrumentsMember |
| 1936 |
Cross Currency Swap, 1,000 Notional Amount |
Member |
|
|
mt:CrossCurrencySwap1000NotionalAmountMember |
| 1937 |
Non deliverable forward contracts |
Member |
|
|
mt:NonDeliverableForwardContractsMember |
| 1938 |
Non deliverable options contracts |
Member |
|
|
mt:NonDeliverableOptionsContractsMember |
| 1939 |
Disclosure of nature and extent of risks arising from financial instruments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems |
| 1940 |
Notional amount |
Concept (Monetary) |
As Of |
|
invest:DerivativeNotionalAmount |
| 1941 |
2440421 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Risk management policy - Foreign Currency Sensitivity Analysis (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsRiskManagementPolicyForeignCurrencySensitivityAnalysisDetails |
| 1942 |
Disclosure of nature and extent of risks arising from financial instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable |
| 1943 |
Types of risks [axis] |
Axis |
|
|
ifrs-full:TypesOfRisksAxis |
| 1944 |
Risks [member] |
Member |
|
|
ifrs-full:TypesOfRisksMember |
| 1945 |
Currency risk |
Member |
|
|
ifrs-full:CurrencyRiskMember |
| 1946 |
Classes of financial assets [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialAssetsAxis |
| 1947 |
Financial assets, class [member] |
Member |
|
|
ifrs-full:FinancialAssetsMember |
| 1948 |
Trade receivables |
Member |
|
|
ifrs-full:TradeReceivablesMember |
| 1949 |
Classes of financial liabilities [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialLiabilitiesAxis |
| 1950 |
Financial liabilities, class [member] |
Member |
|
|
ifrs-full:FinancialLiabilitiesMember |
| 1951 |
Trade payables |
Member |
|
|
mt:TradePayablesMember |
| 1952 |
Currency [Axis] |
Axis |
|
|
srt:CurrencyAxis |
| 1953 |
All Currencies [Domain] |
Member |
|
|
currency:AllCurrenciesDomain |
| 1954 |
USD |
Member |
|
|
currency:USD |
| 1955 |
EUR |
Member |
|
|
currency:EUR |
| 1956 |
BRL |
Member |
|
|
currency:BRL |
| 1957 |
CAD |
Member |
|
|
currency:CAD |
| 1958 |
KZT |
Member |
|
|
currency:KZT |
| 1959 |
ZAR |
Member |
|
|
currency:ZAR |
| 1960 |
MXN |
Member |
|
|
currency:MXN |
| 1961 |
UAH |
Member |
|
|
currency:UAH |
| 1962 |
PLN |
Member |
|
|
currency:PLN |
| 1963 |
ARS |
Member |
|
|
currency:ARS |
| 1964 |
Other (non-USD) |
Member |
|
|
mt:OtherCurrenciesMember |
| 1965 |
Disclosure of nature and extent of risks arising from financial instruments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems |
| 1966 |
Risk exposure associated with instruments sharing characteristic |
Concept (Monetary) |
As Of |
|
ifrs-full:RiskExposureAssociatedWithInstrumentsSharingCharacteristic |
| 1967 |
10% increase, Trade receivables |
Concept (Monetary) |
As Of |
Debit |
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableTenPercentIncreaseImpactOnTradeReceivables |
| 1968 |
10% increase, Trade payables |
Concept (Monetary) |
As Of |
Credit |
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableTenPercentIncreaseImpactOnTradePayables |
| 1969 |
10% decrease, Trade receivables |
Concept (Monetary) |
As Of |
Debit |
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableTenPercentDecreaseImpactOnTradeReceivables |
| 1970 |
10% decrease, Trade payables |
Concept (Monetary) |
As Of |
Credit |
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableTenPercentDecreaseImpactOnTradePayables |
| 1971 |
Reasonably possible change in risk variable, percent |
Concept (Percent) |
For Period |
|
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariablePercent |
| 1972 |
2440422 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Risk management policy - Liquidity Risk (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsRiskManagementPolicyLiquidityRiskDetails |
| 1973 |
Disclosure Of Maturity Analysis For Derivative And Non-derivative Financial Liabilities [Table] |
Table |
* |
* |
mt:DisclosureOfMaturityAnalysisForDerivativeAndNonderivativeFinancialLiabilitiesTable |
| 1974 |
Types of risks [axis] |
Axis |
|
|
ifrs-full:TypesOfRisksAxis |
| 1975 |
Risks [member] |
Member |
|
|
ifrs-full:TypesOfRisksMember |
| 1976 |
Liquidity risk |
Member |
|
|
ifrs-full:LiquidityRiskMember |
| 1977 |
Maturity [axis] |
Axis |
|
|
ifrs-full:MaturityAxis |
| 1978 |
Aggregated time bands [member] |
Member |
|
|
ifrs-full:AggregatedTimeBandsMember |
| 1979 |
Less than 1 year |
Member |
|
|
ifrs-full:NotLaterThanOneYearMember |
| 1980 |
1-2 years |
Member |
|
|
ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember |
| 1981 |
2-5 Years |
Member |
|
|
ifrs-full:LaterThanTwoYearsAndNotLaterThanFiveYearsMember |
| 1982 |
More than 5 years |
Member |
|
|
ifrs-full:LaterThanFiveYearsMember |
| 1983 |
Classes of financial instruments [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialInstrumentsAxis |
| 1984 |
Financial instruments, class [member] |
Member |
|
|
ifrs-full:ClassesOfFinancialInstrumentsMember |
| 1985 |
Equity contracts (Put options) |
Member |
|
|
mt:EquityContract1Member |
| 1986 |
Foreign exchange contracts |
Member |
|
|
mt:ForeignExchangeContract1Member |
| 1987 |
Other commodities contracts |
Member |
|
|
mt:CommodityContract1Member |
| 1988 |
Disclosure Of Maturity Analysis For Derivative And Non-derivative Financial Liabilities [Line Items] |
LineItems |
|
|
mt:DisclosureOfMaturityAnalysisForDerivativeAndNonderivativeFinancialLiabilitiesLineItems |
| 1989 |
Non-derivative Financial Liabilities [Abstract] |
Abstract |
|
|
mt:NonderivativeFinancialLiabilitiesAbstract |
| 1990 |
Bonds |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:BondsIssued |
| 1991 |
Loans over 100 |
Concept (Monetary) |
As Of |
Credit |
mt:LoansOver100 |
| 1992 |
Trade and other payables |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:TradeAndOtherCurrentPayables |
| 1993 |
Other loans |
Concept (Monetary) |
As Of |
Credit |
mt:OtherLoans |
| 1994 |
Total |
Concept (Monetary) |
As Of |
Credit |
mt:NonDerivativeFinancialLiabilities |
| 1995 |
Bonds, contractual cash flow |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:BondsIssuedUndiscountedCashFlows |
| 1996 |
Loans over 100, contractual cash flow |
Concept (Monetary) |
As Of |
Credit |
mt:LoansOver100UndiscountedCashFlows |
| 1997 |
Trade and other payables, contractual cash flow |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:TradeAndOtherPayablesUndiscountedCashFlows |
| 1998 |
Other Loans, contractual cash flow |
Concept (Monetary) |
As Of |
Credit |
mt:OtherLoansUndiscountedCashFlows |
| 1999 |
Non-derivative financial liabilities, contractual cash flow |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NonderivativeFinancialLiabilitiesUndiscountedCashFlows |
| 2000 |
Derivative financial liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DerivativeFinancialLiabilities |
| 2001 |
Derivative financial liabilities, contractual cash flow |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DerivativeFinancialLiabilitiesUndiscountedCashFlows |
| 2002 |
2440423 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Risk management policy - Cash Flow Hedges (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsRiskManagementPolicyCashFlowHedgesDetails |
| 2003 |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [table] |
Table |
* |
* |
ifrs-full:DisclosureOfInformationAboutTermsAndConditionsOfHedgingInstrumentsAndHowTheyAffectFutureCashFlowsTable |
| 2004 |
Hedging instruments [axis] |
Axis |
|
|
ifrs-full:HedgingInstrumentsAxis |
| 2005 |
Hedging instruments [member] |
Member |
|
|
ifrs-full:HedgingInstrumentsMember |
| 2006 |
Foreign exchange contracts |
Member |
|
|
mt:ForeignExchangeContract1Member |
| 2007 |
Commodities |
Member |
|
|
mt:CommodityContract1Member |
| 2008 |
Emission rights |
Member |
|
|
mt:EmissionRightsMember |
| 2009 |
Types of hedges [axis] |
Axis |
|
|
ifrs-full:TypesOfHedgesAxis |
| 2010 |
Hedges [member] |
Member |
|
|
ifrs-full:TypesOfHedgesMember |
| 2011 |
Cash flow hedges |
Member |
|
|
ifrs-full:CashFlowHedgesMember |
| 2012 |
Maturity [axis] |
Axis |
|
|
ifrs-full:MaturityAxis |
| 2013 |
Aggregated time bands [member] |
Member |
|
|
ifrs-full:AggregatedTimeBandsMember |
| 2014 |
3 months and less |
Member |
|
|
ifrs-full:NotLaterThanThreeMonthsMember |
| 2015 |
3-6 months |
Member |
|
|
ifrs-full:LaterThanThreeMonthsAndNotLaterThanSixMonthsMember |
| 2016 |
6-12 months |
Member |
|
|
ifrs-full:LaterThanSixMonthsAndNotLaterThanOneYearMember |
| 2017 |
1-2 years |
Member |
|
|
ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember |
| 2018 |
More than 2 years |
Member |
|
|
mt:LaterThanTwoYearsMember |
| 2019 |
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfInformationAboutTermsAndConditionsOfHedgingInstrumentsAndHowTheyAffectFutureCashFlowsLineItems |
| 2020 |
Financial instruments designated as hedging instruments, at fair value |
Concept (Monetary) |
As Of |
|
ifrs-full:FinancialInstrumentsDesignatedAsHedgingInstrumentsAtFairValue |
| 2021 |
Reserve of cash flow hedges |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ReserveOfCashFlowHedges |
| 2022 |
2440424 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Risk management policy - Effect of Hedge Accounting - Hedging Instruments (Details) (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsRiskManagementPolicyEffectOfHedgeAccountingHedgingInstrumentsDetailsDetails |
| 2023 |
Disclosure of detailed information about hedging instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDetailedInformationAboutHedgingInstrumentsTable |
| 2024 |
Income Statement Location1 [Axis] |
Axis |
|
|
mt:BalanceSheetLocation1Axis |
| 2025 |
Income Statement Location1 [Domain] |
Member |
|
|
mt:IncomeStatementLocation1Domain |
| 2026 |
Prepaid expenses and other current assets |
Member |
|
|
mt:CurrentPrepaymentsAndOtherCurrentAssetsMember |
| 2027 |
Accrued expenses and other liabilities |
Member |
|
|
mt:AccruedExpensesAndOtherLiabilitiesMember |
| 2028 |
Other long-term obligations |
Member |
|
|
mt:OtherLongTermObligationsMember |
| 2029 |
Other assets |
Member |
|
|
ifrs-full:OtherAssetsMember |
| 2030 |
Types of risks [axis] |
Axis |
|
|
ifrs-full:TypesOfRisksAxis |
| 2031 |
Risks [member] |
Member |
|
|
ifrs-full:TypesOfRisksMember |
| 2032 |
Currency risk |
Member |
|
|
ifrs-full:CurrencyRiskMember |
| 2033 |
Commodity price risk |
Member |
|
|
ifrs-full:CommodityPriceRiskMember |
| 2034 |
Types of hedges [axis] |
Axis |
|
|
ifrs-full:TypesOfHedgesAxis |
| 2035 |
Hedges [member] |
Member |
|
|
ifrs-full:TypesOfHedgesMember |
| 2036 |
Cash flow hedges |
Member |
|
|
ifrs-full:CashFlowHedgesMember |
| 2037 |
Hedging instruments [axis] |
Axis |
|
|
ifrs-full:HedgingInstrumentsAxis |
| 2038 |
Hedging instruments [member] |
Member |
|
|
ifrs-full:HedgingInstrumentsMember |
| 2039 |
Foreign exchange contracts |
Member |
|
|
mt:ForeignExchangeContract1Member |
| 2040 |
Non deliverable options contracts |
Member |
|
|
mt:NonDeliverableOptionsContractsMember |
| 2041 |
Commodities |
Member |
|
|
mt:CommodityContract1Member |
| 2042 |
Energy forwards |
Member |
|
|
mt:EnergyForwardsMember |
| 2043 |
Emission rights |
Member |
|
|
mt:EmissionRightsMember |
| 2044 |
Disclosure of detailed information about hedging instruments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutHedgingInstrumentsLineItems |
| 2045 |
Nominal amount of the hedging instrument |
Concept (Decimal) |
As Of |
|
ifrs-full:NominalAmountOfHedgingInstrument |
| 2046 |
Assets carrying amount |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:HedgingInstrumentAssets |
| 2047 |
Liabilities carrying amount |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:HedgingInstrumentLiabilities |
| 2048 |
Changes in fair value used for calculated hedge ineffectiveness |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainLossOnChangeInFairValueOfHedgingInstrumentUsedAsBasisForRecognisingHedgeIneffectiveness |
| 2049 |
2440425 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Risk management policy - Effect of Hedge Accounting - Hedged Items (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsRiskManagementPolicyEffectOfHedgeAccountingHedgedItemsDetails |
| 2050 |
Disclosure of detailed information about hedged items [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDetailedInformationAboutHedgedItemsTable |
| 2051 |
Types of risks [axis] |
Axis |
|
|
ifrs-full:TypesOfRisksAxis |
| 2052 |
Risks [member] |
Member |
|
|
ifrs-full:TypesOfRisksMember |
| 2053 |
Foreign exchange risk |
Member |
|
|
ifrs-full:CurrencyRiskMember |
| 2054 |
Commodity price risk |
Member |
|
|
ifrs-full:CommodityPriceRiskMember |
| 2055 |
Types of hedges [axis] |
Axis |
|
|
ifrs-full:TypesOfHedgesAxis |
| 2056 |
Hedges [member] |
Member |
|
|
ifrs-full:TypesOfHedgesMember |
| 2057 |
Cash flow hedges |
Member |
|
|
ifrs-full:CashFlowHedgesMember |
| 2058 |
Net investment hedge |
Member |
|
|
ifrs-full:HedgesOfNetInvestmentInForeignOperationsMember |
| 2059 |
Hedged items [axis] |
Axis |
|
|
ifrs-full:HedgedItemsAxis |
| 2060 |
Hedged items [member] |
Member |
|
|
ifrs-full:HedgedItemsMember |
| 2061 |
Foreign exchange contracts |
Member |
|
|
mt:ForeignExchangeContract1Member |
| 2062 |
Non deliverable options contracts |
Member |
|
|
mt:NonDeliverableOptionsContractsMember |
| 2063 |
Commodities |
Member |
|
|
mt:CommodityContract1Member |
| 2064 |
Energy forwards |
Member |
|
|
mt:EnergyForwardsMember |
| 2065 |
Emission rights |
Member |
|
|
mt:EmissionRightsMember |
| 2066 |
Cross Currency Swap |
Member |
|
|
mt:CrossCurrencySwapMember |
| 2067 |
EUR Debt |
Member |
|
|
mt:EURDebtMember |
| 2068 |
Disclosure of detailed information about hedged items [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutHedgedItemsLineItems |
| 2069 |
Nominal amount of the hedging instrument |
Concept (Decimal) |
As Of |
|
ifrs-full:NominalAmountOfHedgingInstrument |
| 2070 |
Assets carrying amount |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:HedgedItemAssets |
| 2071 |
Liabilities carrying amount |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:HedgedItemLiabilities |
| 2072 |
Hedging gains or losses of the reporting period that were recognized in OCI |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainLossOnHedgeIneffectivenessRecognisedInOtherComprehensiveIncome |
| 2073 |
Change in value used for calculating hedge ineffectiveness |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainLossOnChangeInFairValueOfHedgedItemUsedAsBasisForRecognisingHedgeIneffectiveness |
| 2074 |
Cash flow hedge reserve |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ReserveOfCashFlowHedgesContinuingHedges |
| 2075 |
2440426 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Risk management policy - Net Investment Hedges (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsRiskManagementPolicyNetInvestmentHedgesDetails |
| 2076 |
Disclosure of detailed information about hedging instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDetailedInformationAboutHedgingInstrumentsTable |
| 2077 |
Types of hedges [axis] |
Axis |
|
|
ifrs-full:TypesOfHedgesAxis |
| 2078 |
Hedges [member] |
Member |
|
|
ifrs-full:TypesOfHedgesMember |
| 2079 |
Net investment hedge |
Member |
|
|
ifrs-full:HedgesOfNetInvestmentInForeignOperationsMember |
| 2080 |
Hedging instruments [axis] |
Axis |
|
|
ifrs-full:HedgingInstrumentsAxis |
| 2081 |
Hedging instruments [member] |
Member |
|
|
ifrs-full:HedgingInstrumentsMember |
| 2082 |
Cross Currency Swap, 375 Notional Amount |
Member |
|
|
mt:CrossCurrencySwap375NotionalAmountMember |
| 2083 |
Cross Currency Swap, 1,000 Notional Amount |
Member |
|
|
mt:CrossCurrencySwap1000NotionalAmountMember |
| 2084 |
Cross Currency Swap, 500 Notional Amount |
Member |
|
|
mt:CrossCurrencySwap500NotionalAmountMember |
| 2085 |
Cross Currency Swap, 300 Notional Amount |
Member |
|
|
mt:CrossCurrencySwap300NotionalAmountMember |
| 2086 |
Cross Currency Swap, 160 Notional Amount |
Member |
|
|
mt:CrossCurrencySwap160NotionalAmountMember |
| 2087 |
Cross Currency Swap, 40 Notional Amount |
Member |
|
|
mt:CrossCurrencySwap40NotionalAmountMember |
| 2088 |
Disclosure of detailed information about hedging instruments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutHedgingInstrumentsLineItems |
| 2089 |
Hedged item, assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:HedgedItemAssets |
| 2090 |
Notional amount |
Concept (Monetary) |
As Of |
|
invest:DerivativeNotionalAmount |
| 2091 |
Deferred gain on net investment hedge |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ReclassificationAdjustmentsOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax |
| 2092 |
Deferred gain on net investment hedge, tax |
Concept (Monetary) |
For Period |
Credit |
mt:ReclassificationAdjustmentsOnHedgesOfNetInvestmentsInForeignOperationsTax |
| 2093 |
Hedging instrument deferred tax |
Concept (Monetary) |
As Of |
Debit |
mt:FinancialInstrumentsDesignatedAsHedgingInstrumentsAtFairValueDeferredTax |
| 2094 |
Hedging instrument, liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:HedgingInstrumentLiabilities |
| 2095 |
Gains on hedges of net investments in foreign operations, net of tax |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsNetOfTax |
| 2096 |
Derivative maturity term |
Concept (xbrli:durationItemType) |
For Period |
|
mt:DerivativeMaturityTerm |
| 2097 |
Net Investment Hedge Fair Value: |
Abstract |
|
|
mt:NetInvestmentHedgeFairValueRollForward |
| 2098 |
Derivative at fair value at beginning of period |
Concept (Monetary) |
As Of |
|
ifrs-full:FinancialInstrumentsDesignatedAsHedgingInstrumentsAtFairValue |
| 2099 |
Change in fair value |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsBeforeTax |
| 2100 |
Derivative at fair value at end of period |
Concept (Monetary) |
As Of |
|
ifrs-full:FinancialInstrumentsDesignatedAsHedgingInstrumentsAtFairValue |
| 2101 |
2440427 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Risk management policy - Raw Materials, Freight, Energy Risks and Emission Rights (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsRiskManagementPolicyRawMaterialsFreightEnergyRisksAndEmissionRightsDetails |
| 2102 |
Disclosure of detailed information about financial instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialInstrumentsTable |
| 2103 |
Classes of financial instruments [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialInstrumentsAxis |
| 2104 |
Financial instruments, class [member] |
Member |
|
|
ifrs-full:ClassesOfFinancialInstrumentsMember |
| 2105 |
Total raw materials (base metals), freight, energy, emission rights |
Member |
|
|
mt:RawMaterialsFreightEnergyEmissionRightsMember |
| 2106 |
Base Metals |
Member |
|
|
mt:BaseMetalsMember |
| 2107 |
Freight |
Member |
|
|
mt:FreightMember |
| 2108 |
Energy (oil, gas, electricity) |
Member |
|
|
mt:EnergyOilGasElectricityMember |
| 2109 |
Emission rights |
Member |
|
|
mt:EmissionRightsMember |
| 2110 |
Disclosure of detailed information about financial instruments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialInstrumentsLineItems |
| 2111 |
Net financial derivatives |
Concept (Monetary) |
As Of |
Debit |
mt:DerivativeFinancialAssetsLiabilities |
| 2112 |
Derivative financial assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:DerivativeFinancialAssets |
| 2113 |
Derivative financial liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DerivativeFinancialLiabilities |
| 2114 |
Notional amount |
Concept (Monetary) |
As Of |
|
invest:DerivativeNotionalAmount |
| 2115 |
2440428 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Risk management policy - Foreign Currency Sensitivity (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsRiskManagementPolicyForeignCurrencySensitivityDetails |
| 2116 |
Disclosure of nature and extent of risks arising from financial instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable |
| 2117 |
Types of risks [axis] |
Axis |
|
|
ifrs-full:TypesOfRisksAxis |
| 2118 |
Risks [member] |
Member |
|
|
ifrs-full:TypesOfRisksMember |
| 2119 |
Currency risk |
Member |
|
|
ifrs-full:CurrencyRiskMember |
| 2120 |
Disclosure of nature and extent of risks arising from financial instruments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems |
| 2121 |
Reasonably possible increase in risk variable percent |
Concept (Percent) |
For Period |
|
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePercent |
| 2122 |
Reasonably possible decrease in risk variable percent |
Concept (Percent) |
For Period |
|
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariablePercent |
| 2123 |
Reasonably possible increase in risk variable, impact on income |
Concept (Monetary) |
For Period |
Credit |
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnIncome |
| 2124 |
Reasonably possible increase in risk variable, impact on equity |
Concept (Monetary) |
For Period |
Credit |
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnEquity |
| 2125 |
Reasonably possible decrease in risk variable, impact on income |
Concept (Monetary) |
For Period |
Credit |
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableImpactOnIncome |
| 2126 |
Reasonably possible decrease in risk variable, impact on equity |
Concept (Monetary) |
For Period |
Credit |
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableImpactOnEquity |
| 2127 |
2440429 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Risk management policy - Cash Flow Sensitivity on Variable Rate Instruments (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsRiskManagementPolicyCashFlowSensitivityOnVariableRateInstrumentsDetails |
| 2128 |
Disclosure of nature and extent of risks arising from financial instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable |
| 2129 |
Types of interest rates [axis] |
Axis |
|
|
ifrs-full:TypesOfInterestRatesAxis |
| 2130 |
Interest rate types [member] |
Member |
|
|
ifrs-full:InterestRateTypesMember |
| 2131 |
Floating interest rate |
Member |
|
|
ifrs-full:FloatingInterestRateMember |
| 2132 |
Types of risks [axis] |
Axis |
|
|
ifrs-full:TypesOfRisksAxis |
| 2133 |
Risks [member] |
Member |
|
|
ifrs-full:TypesOfRisksMember |
| 2134 |
Interest rate risk |
Member |
|
|
ifrs-full:InterestRateRiskMember |
| 2135 |
Disclosure of nature and extent of risks arising from financial instruments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems |
| 2136 |
Reasonably possible increase in risk variable percent |
Concept (Percent) |
For Period |
|
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePercent |
| 2137 |
Reasonably possible decrease in risk variable percent |
Concept (Percent) |
For Period |
|
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariablePercent |
| 2138 |
Reasonable possible increase in risk variable, debt |
Concept (Monetary) |
For Period |
Credit |
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableDebt |
| 2139 |
Reasonable possible decrease in risk variable, debt |
Concept (Monetary) |
For Period |
Credit |
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableDebt |
| 2140 |
Reasonable possible increase in risk variable, derivatives |
Concept (Monetary) |
For Period |
Debit |
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableDerivatives |
| 2141 |
Reasonable possible decrease in risk variable, derivatives |
Concept (Monetary) |
For Period |
Debit |
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableDerivatives |
| 2142 |
2440430 - Disclosure - FINANCING AND FINANCIAL INSTRUMENTS - Risk management policy - Sensitivity Analaysis - Base Metals, Energy, Freight, Emissions Right (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/FinancingAndFinancialInstrumentsRiskManagementPolicySensitivityAnalaysisBaseMetalsEnergyFreightEmissionsRightDetails |
| 2143 |
Disclosure of nature and extent of risks arising from financial instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable |
| 2144 |
Types of risks [axis] |
Axis |
|
|
ifrs-full:TypesOfRisksAxis |
| 2145 |
Risks [member] |
Member |
|
|
ifrs-full:TypesOfRisksMember |
| 2146 |
Commodity price risk |
Member |
|
|
ifrs-full:CommodityPriceRiskMember |
| 2147 |
Commodity Type [Axis] |
Axis |
|
|
mt:CommodityTypeAxis |
| 2148 |
Commodity Type [Domain] |
Member |
|
|
mt:CommodityTypeDomain |
| 2149 |
Base Metals |
Member |
|
|
mt:BaseMetalsMember |
| 2150 |
Iron Ore |
Member |
|
|
mt:IronOreMember |
| 2151 |
Freight |
Member |
|
|
mt:FreightMember |
| 2152 |
Emission rights |
Member |
|
|
mt:EmissionRightsMember |
| 2153 |
Energy |
Member |
|
|
mt:EnergyMember |
| 2154 |
Disclosure of nature and extent of risks arising from financial instruments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems |
| 2155 |
Reasonably possible increase in risk variable percent |
Concept (Percent) |
For Period |
|
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePercent |
| 2156 |
Reasonably possible decrease in risk variable percent |
Concept (Percent) |
For Period |
|
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariablePercent |
| 2157 |
Reasonably possible increase in risk variable, impact on income |
Concept (Monetary) |
For Period |
Credit |
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnIncome |
| 2158 |
Reasonably possible increase in risk variable, impact on equity |
Concept (Monetary) |
For Period |
Credit |
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariableImpactOnEquity |
| 2159 |
Reasonably possible decrease in risk variable, impact on income |
Concept (Monetary) |
For Period |
Credit |
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableImpactOnIncome |
| 2160 |
Reasonably possible decrease in risk variable, impact on equity |
Concept (Monetary) |
For Period |
Credit |
mt:SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleDecreaseInRiskVariableImpactOnEquity |
| 2161 |
2441402 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Employees and Key Management Personnel Narrative (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsEmployeesAndKeyManagementPersonnelNarrativeDetails |
| 2162 |
Implied Table |
Table |
* |
* |
implied:Table |
| 2163 |
Employee Benefits [Abstract] |
Abstract |
|
|
mt:EmployeeBenefitsAbstract |
| 2164 |
Number of employees |
Concept (Decimal) |
As Of |
|
ifrs-full:NumberOfEmployees |
| 2165 |
2441403 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Employees' Compensation (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsEmployeesCompensationDetails |
| 2166 |
Implied Table |
Table |
* |
* |
implied:Table |
| 2167 |
Employee Benefits [Abstract] |
Abstract |
|
|
mt:EmployeeBenefitsAbstract |
| 2168 |
Wages and salaries |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:WagesAndSalaries |
| 2169 |
Pension cost (see note 7.2) |
Concept (Monetary) |
For Period |
Debit |
mt:PensionCostsExcludingCertainAgreements |
| 2170 |
Loss/(gain) following new labor agreement in the U.S. (see note 7.2) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PastServiceCostNetDefinedBenefitLiabilityAsset |
| 2171 |
Other staff expenses |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:OtherEmployeeExpense |
| 2172 |
Total |
Concept (Monetary) |
For Period |
Debit |
mt:EmployeeExpense |
| 2173 |
2441404 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Key Personnel's Compensation (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsKeyPersonnelsCompensationDetails |
| 2174 |
Implied Table |
Table |
* |
* |
implied:Table |
| 2175 |
Employee Benefits [Abstract] |
Abstract |
|
|
mt:EmployeeBenefitsAbstract |
| 2176 |
Base salary and directors fees |
Concept (Monetary) |
For Period |
Debit |
mt:KeyManagementPersonnelCompensationBaseSalaryAndDirectorsFees |
| 2177 |
Short-term performance-related bonus |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits |
| 2178 |
Post-employment benefits |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:KeyManagementPersonnelCompensationPostemploymentBenefits |
| 2179 |
Share-based compensation |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment |
| 2180 |
2441405 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Deferred Employee Benefits (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsDeferredEmployeeBenefitsDetails |
| 2181 |
Disclosure of net defined benefit liability (asset) [table] |
Table |
* |
* |
ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable |
| 2182 |
Defined benefit plans [axis] |
Axis |
|
|
ifrs-full:DefinedBenefitPlansAxis |
| 2183 |
Defined benefit plans [member] |
Member |
|
|
ifrs-full:DefinedBenefitPlansMember |
| 2184 |
Defined benefit liabilities |
Member |
|
|
mt:PensionPlanOtherPostemploymentAndEarlyRetirementBenefitPlansMember |
| 2185 |
Pension plan benefits |
Member |
|
|
mt:DefinedBenefitPensionPlanMember |
| 2186 |
Other post-employment benefits |
Member |
|
|
mt:OtherPostEmploymentBenefitPlanMember |
| 2187 |
Early retirement benefits |
Member |
|
|
mt:EarlyRetirementBenefitsMember |
| 2188 |
Termination benefits |
Member |
|
|
mt:TerminationBenefitsMember |
| 2189 |
Disclosure of net defined benefit liability (asset) [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems |
| 2190 |
Deferred employee benefits |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ProvisionsForEmployeeBenefits |
| 2191 |
2441406 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Deferred Employee Benefits - Additional Information (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsDeferredEmployeeBenefitsAdditionalInformationDetails |
| 2192 |
Disclosure of defined benefit plans [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDefinedBenefitPlansTable |
| 2193 |
Net defined benefit liability (asset) [axis] |
Axis |
|
|
ifrs-full:NetDefinedBenefitLiabilityAssetAxis |
| 2194 |
Net defined benefit liability (asset) [member] |
Member |
|
|
ifrs-full:NetDefinedBenefitLiabilityAssetMember |
| 2195 |
Present value of defined benefit obligation |
Member |
|
|
ifrs-full:PresentValueOfDefinedBenefitObligationMember |
| 2196 |
Scenario [Axis] |
Axis |
|
|
mt:Scenario1Axis |
| 2197 |
Scenario [Domain] |
Member |
|
|
mt:ScenarioDomain |
| 2198 |
Forecast |
Member |
|
|
mt:ScenarioForecast1Member |
| 2199 |
Actuarial assumptions [axis] |
Axis |
|
|
ifrs-full:ActuarialAssumptionsAxis |
| 2200 |
Actuarial assumptions [member] |
Member |
|
|
ifrs-full:ActuarialAssumptionsMember |
| 2201 |
Actuarial assumption of mortality rates |
Member |
|
|
ifrs-full:ActuarialAssumptionOfMortalityRatesMember |
| 2202 |
Actuarial assumption of medical cost trend rates |
Member |
|
|
ifrs-full:ActuarialAssumptionOfMedicalCostTrendRatesMember |
| 2203 |
Adjustment for experience |
Member |
|
|
mt:ActuarialAssumptionAdjustmentForExperienceMember |
| 2204 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 2205 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 2206 |
United States |
Member |
|
|
country:US |
| 2207 |
Belgium |
Member |
|
|
country:BE |
| 2208 |
France |
Member |
|
|
country:FR |
| 2209 |
Defined benefit plans [axis] |
Axis |
|
|
ifrs-full:DefinedBenefitPlansAxis |
| 2210 |
Defined benefit plans [member] |
Member |
|
|
ifrs-full:DefinedBenefitPlansMember |
| 2211 |
Defined benefit obligation |
Member |
|
|
mt:DefinedBenefitPensionPlanMember |
| 2212 |
Other post-employment benefits |
Member |
|
|
mt:OtherPostEmploymentBenefitPlanMember |
| 2213 |
Income Statement Location1 [Axis] |
Axis |
|
|
mt:BalanceSheetLocation1Axis |
| 2214 |
Income Statement Location1 [Domain] |
Member |
|
|
mt:IncomeStatementLocation1Domain |
| 2215 |
Cost of sales |
Member |
|
|
mt:CostofSalesMember |
| 2216 |
Legal Entity [Axis] |
Axis |
|
|
dei:LegalEntityAxis |
| 2217 |
Entity [Domain] |
Member |
|
|
dei:EntityDomain |
| 2218 |
ArcelorMittal USA LLC |
Member |
|
|
mt:ArcelorMittalUSALLCMember |
| 2219 |
Disclosure of defined benefit plans [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDefinedBenefitPlansLineItems |
| 2220 |
Percentage of employees covered by defined benefit plan |
Concept (Percent) |
As Of |
|
mt:PercentageofEmployeesCoveredByDefinedBenefitPlan |
| 2221 |
Number of participating employers |
Concept (Integer) |
As Of |
|
mt:NumberOfParticipatingEmployersInMultiEmployerPlan |
| 2222 |
Contributions per contributory hour |
Concept (Decimal) |
For Period |
|
mt:DefinedContributionPlanEmployerMatchingContributionAmountPerContributoryHour |
| 2223 |
Rates of return of insured plans on employer contributions |
Concept (Percent) |
For Period |
|
mt:DefinedContributionPlanEmployersMatchingContributionMinimumGuaranteedRateOfReturn |
| 2224 |
Rates of return of insured plans on employee contributions |
Concept (Percent) |
For Period |
|
mt:DefinedContributionPlanEmployeeContributionMinimumGuaranteedRateOfReturn |
| 2225 |
Minimum guaranteed rate of return of insured plans |
Concept (Percent) |
For Period |
|
mt:DefinedContributionPlanMinimumGuaranteedRateOfReturn |
| 2226 |
Gain in cost of sales and selling, general and administrative expenses |
Concept (Monetary) |
For Period |
Debit |
mt:GainLossinCostofSalesandSellingGeneralandAdministrativeExpenses |
| 2227 |
Gain following new labor agreement in the U.S. (see note 7.2) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PastServiceCostNetDefinedBenefitLiabilityAsset |
| 2228 |
Fixed payment into VEBA trust as a percentage of operating income |
Concept (Percent) |
For Period |
|
mt:ContributionsToPlanByEmployerPercentageOfOperatingIncome |
| 2229 |
Percentage of assets in fixed income |
Concept (Percent) |
As Of |
|
mt:FixedIncomeInstrumentsPercentageContributedToFairValueOfPlanAssets |
| 2230 |
Percentage of assets in equities |
Concept (Percent) |
As Of |
|
mt:EquityInstrumentsPercentageContributedToFairValueOfPlanAssets |
| 2231 |
Plan assets, at fair value |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PlanAssetsAtFairValue |
| 2232 |
Entity's own financial instruments included in fair value of plan assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:DescriptionOfAmountsOfEntitysOwnFinancialInstrumentsIncludedInFairValueOfPlanAssets |
| 2233 |
Actual return on invested assets |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset |
| 2234 |
Estimate of contributions expected to be paid to plan for next annual reporting period |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:EstimateOfContributionsExpectedToBePaidToPlan |
| 2235 |
Defined contribution plan expected cash contributions |
Concept (Monetary) |
For Period |
Credit |
mt:DefinedContributionPlanExpectedToBePaidToPlan |
| 2236 |
Multiple-employer plan accounted for as multiemployer plan, expected cash contributions |
Concept (Monetary) |
For Period |
Credit |
mt:MultipleEmployerPlanAccountedforasMultiemployerPlanExpectedToBePaidToPlan |
| 2237 |
Defined contribution plan, cash contributions |
Concept (Monetary) |
For Period |
Debit |
mt:DefinedContributionPlanEmployerDiscretionaryContributionAmount1 |
| 2238 |
Multiple-employer plan accounted for as multiemployer plan, cash contributions |
Concept (Monetary) |
For Period |
Credit |
mt:MultipleEmployerPlanAccountedforasMultiemployerPlanContributionbyParticipatingEntity |
| 2239 |
Weighted average duration of defined benefit obligation (in years) |
Concept (Decimal) |
For Period |
|
ifrs-full:WeightedAverageDurationOfDefinedBenefitObligation |
| 2240 |
Increase (decrease) in net defined benefit liability |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseInNetDefinedBenefitLiabilityAsset |
| 2241 |
Actuarial assumption of life expectancy after retirement |
Concept (Decimal) |
As Of |
|
ifrs-full:ActuarialAssumptionOfLifeExpectancyAfterRetirement |
| 2242 |
Multiemployer plans, accumulated benefit obligation |
Concept (Monetary) |
As Of |
Credit |
mt:MultiemployerPlansAccumulatedBenefitObligation1 |
| 2243 |
Multiemployer plans, market value of assets |
Concept (Monetary) |
As Of |
Debit |
mt:MultiemployerPlansPlanAssets1 |
| 2244 |
Funded ratio percentage |
Concept (Percent) |
As Of |
|
mt:MultiemployerPlansFundedStatusPercent |
| 2245 |
Percentage of total contributions made to the plan |
Concept (Percent) |
For Period |
|
mt:MultipleEmployerPlanAccountedforasMultiemployerPlanContributionbyParticipatingEntityPercent |
| 2246 |
2441407 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Reconciliation of Defined Benefit Obligation, Plan Assets and Statements of Financial Position (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsReconciliationOfDefinedBenefitObligationPlanAssetsAndStatementsOfFinancialPositionDetails |
| 2247 |
Disclosure of net defined benefit liability (asset) [table] |
Table |
* |
* |
ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable |
| 2248 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 2249 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 2250 |
United States |
Member |
|
|
country:US |
| 2251 |
Canada |
Member |
|
|
country:CA |
| 2252 |
Brazil |
Member |
|
|
country:BR |
| 2253 |
Europe |
Member |
|
|
mt:Europe1Member |
| 2254 |
Other |
Member |
|
|
mt:OtherRegionsMember |
| 2255 |
Defined benefit plans [axis] |
Axis |
|
|
ifrs-full:DefinedBenefitPlansAxis |
| 2256 |
Defined benefit plans [member] |
Member |
|
|
ifrs-full:DefinedBenefitPlansMember |
| 2257 |
Defined benefit obligation |
Member |
|
|
mt:DefinedBenefitPensionPlanMember |
| 2258 |
Net defined benefit liability (asset) [axis] |
Axis |
|
|
ifrs-full:NetDefinedBenefitLiabilityAssetAxis |
| 2259 |
Net defined benefit liability (asset) [member] |
Member |
|
|
ifrs-full:NetDefinedBenefitLiabilityAssetMember |
| 2260 |
Present value of defined benefit obligation |
Member |
|
|
ifrs-full:PresentValueOfDefinedBenefitObligationMember |
| 2261 |
Plan assets |
Member |
|
|
ifrs-full:PlanAssetsMember |
| 2262 |
Disclosure of net defined benefit liability (asset) [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems |
| 2263 |
Balance at beginning of the period |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilityAssetOfDefinedBenefitPlans |
| 2264 |
Current service cost |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset |
| 2265 |
Interest cost (income) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset |
| 2266 |
Past service cost - Plan amendments |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PastServiceCostNetDefinedBenefitLiabilityAsset |
| 2267 |
Plan participants’ contribution |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset |
| 2268 |
Settlements |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:GainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset |
| 2269 |
Actuarial (gain) loss |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset |
| 2270 |
Demographic assumptions |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset |
| 2271 |
Financial assumptions |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset |
| 2272 |
Experience adjustment |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset |
| 2273 |
Benefits paid |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset |
| 2274 |
Termination benefits |
Concept (Monetary) |
For Period |
Debit |
mt:TerminationBenefitsExpenseNetDefinedLiabilityAsset |
| 2275 |
Foreign currency exchange rate differences and other movements |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset |
| 2276 |
Return on plan assets greater/(less) than discount rate |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset |
| 2277 |
Employer contribution |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset |
| 2278 |
Balance at end of the period |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilityAssetOfDefinedBenefitPlans |
| 2279 |
Present value of the wholly or partly funded obligation |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DefinedBenefitObligationAtPresentValue |
| 2280 |
Fair value of plan assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PlanAssetsAtFairValue |
| 2281 |
Net present value of the wholly or partly funded obligation |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:SurplusDeficitInPlan |
| 2282 |
Present value of the unfunded obligation |
Concept (Monetary) |
As Of |
Credit |
mt:UnfundedDefinedBenefitObligationAtPresentValue |
| 2283 |
Prepaid due to unrecoverable surpluses |
Concept (Monetary) |
As Of |
Credit |
mt:UnrecoverableSurplusInPlan |
| 2284 |
Net amount recognized |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilityAssetOfDefinedBenefitPlans |
| 2285 |
Net assets related to funded obligations |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:AssetsOfBenefitPlan |
| 2286 |
Recognized liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ProvisionsForEmployeeBenefits |
| 2287 |
Surplus (deficit) in plan [abstract] |
Abstract |
|
|
ifrs-full:SurplusDeficitInPlanAbstract |
| 2288 |
Unrecoverable surplus at beginning of period |
Concept (Monetary) |
As Of |
Credit |
mt:UnrecoverableSurplusInPlan |
| 2289 |
Interest cost on unrecoverable surplus |
Concept (Monetary) |
For Period |
Credit |
mt:InterestExpenseUnrecoverableSurplusInPlan |
| 2290 |
Change in unrecoverable surplus in excess of interest |
Concept (Monetary) |
For Period |
Credit |
mt:IncreaseDecreaseThroughExcessOfInterestUnrecoverableSurplusInPlan |
| 2291 |
Exchange rates changes |
Concept (Monetary) |
For Period |
Credit |
mt:IncreaseDecreaseThroughNetExchangeDifferencesUnrecoverableSurplusInPlan |
| 2292 |
Unrecoverable surplus at end of the period |
Concept (Monetary) |
As Of |
Credit |
mt:UnrecoverableSurplusInPlan |
| 2293 |
2441408 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Net Periodic Pension Cost (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsNetPeriodicPensionCostDetails |
| 2294 |
Disclosure of net defined benefit liability (asset) [table] |
Table |
* |
* |
ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable |
| 2295 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 2296 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 2297 |
United States |
Member |
|
|
country:US |
| 2298 |
Canada |
Member |
|
|
country:CA |
| 2299 |
Brazil |
Member |
|
|
country:BR |
| 2300 |
Europe |
Member |
|
|
mt:Europe1Member |
| 2301 |
Other |
Member |
|
|
mt:OtherRegionsMember |
| 2302 |
Defined benefit plans [axis] |
Axis |
|
|
ifrs-full:DefinedBenefitPlansAxis |
| 2303 |
Defined benefit plans [member] |
Member |
|
|
ifrs-full:DefinedBenefitPlansMember |
| 2304 |
Defined benefit obligation |
Member |
|
|
mt:DefinedBenefitPensionPlanMember |
| 2305 |
Disclosure of net defined benefit liability (asset) [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems |
| 2306 |
Current service cost |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset |
| 2307 |
Past service cost - Plan amendments |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PastServiceCostNetDefinedBenefitLiabilityAsset |
| 2308 |
Past service cost - Curtailments |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:GainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset |
| 2309 |
Cost of termination benefits |
Concept (Monetary) |
For Period |
Credit |
mt:Costofterminationbenefitsnetdefinedbenefitliabilityasset |
| 2310 |
Net interest cost/(income) on net DB liability/(asset) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset |
| 2311 |
Total |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans |
| 2312 |
2441409 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Summary of Changes in the OPEB Obligation and Changes in Plan Assets (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsSummaryOfChangesInOpebObligationAndChangesInPlanAssetsDetails |
| 2313 |
Disclosure of net defined benefit liability (asset) [table] |
Table |
* |
* |
ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable |
| 2314 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 2315 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 2316 |
United States |
Member |
|
|
country:US |
| 2317 |
Canada |
Member |
|
|
country:CA |
| 2318 |
Europe |
Member |
|
|
mt:Europe1Member |
| 2319 |
Other |
Member |
|
|
mt:OtherRegionsMember |
| 2320 |
Defined benefit plans [axis] |
Axis |
|
|
ifrs-full:DefinedBenefitPlansAxis |
| 2321 |
Defined benefit plans [member] |
Member |
|
|
ifrs-full:DefinedBenefitPlansMember |
| 2322 |
Other post-employment benefits |
Member |
|
|
mt:OtherPostEmploymentBenefitPlanMember |
| 2323 |
Net defined benefit liability (asset) [axis] |
Axis |
|
|
ifrs-full:NetDefinedBenefitLiabilityAssetAxis |
| 2324 |
Net defined benefit liability (asset) [member] |
Member |
|
|
ifrs-full:NetDefinedBenefitLiabilityAssetMember |
| 2325 |
Present value of defined benefit obligation |
Member |
|
|
ifrs-full:PresentValueOfDefinedBenefitObligationMember |
| 2326 |
Plan assets |
Member |
|
|
ifrs-full:PlanAssetsMember |
| 2327 |
Disclosure of net defined benefit liability (asset) [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems |
| 2328 |
Balance at beginning of the period |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilityAssetOfDefinedBenefitPlans |
| 2329 |
Current service cost |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset |
| 2330 |
Interest cost (income) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset |
| 2331 |
Past service cost - Plan amendments |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PastServiceCostNetDefinedBenefitLiabilityAsset |
| 2332 |
Past service cost - Curtailments |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:GainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset |
| 2333 |
Plan participants’ contribution |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset |
| 2334 |
Actuarial (gain) loss |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset |
| 2335 |
Demographic assumptions |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset |
| 2336 |
Financial assumptions |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset |
| 2337 |
Experience adjustment |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset |
| 2338 |
Benefits paid |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset |
| 2339 |
Foreign currency exchange rate differences and other movements |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset |
| 2340 |
Return on plan assets greater/(less) than discount rate |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset |
| 2341 |
Employer contribution |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset |
| 2342 |
Balance at end of the period |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilityAssetOfDefinedBenefitPlans |
| 2343 |
Present value of the wholly or party funded obligation |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DefinedBenefitObligationAtPresentValue |
| 2344 |
Fair value of plan assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PlanAssetsAtFairValue |
| 2345 |
Net present value of the wholly or partly funded obligation |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:SurplusDeficitInPlan |
| 2346 |
Present value of the unfunded obligation |
Concept (Monetary) |
As Of |
Credit |
mt:UnfundedDefinedBenefitObligationAtPresentValue |
| 2347 |
Net amount recognized |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilityAssetOfDefinedBenefitPlans |
| 2348 |
2441410 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Net Periodic Other Post-Employment Cost (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsNetPeriodicOtherPostEmploymentCostDetails |
| 2349 |
Disclosure of net defined benefit liability (asset) [table] |
Table |
* |
* |
ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable |
| 2350 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 2351 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 2352 |
United States |
Member |
|
|
country:US |
| 2353 |
Canada |
Member |
|
|
country:CA |
| 2354 |
Europe |
Member |
|
|
mt:Europe1Member |
| 2355 |
Other |
Member |
|
|
mt:OtherRegionsMember |
| 2356 |
Defined benefit plans [axis] |
Axis |
|
|
ifrs-full:DefinedBenefitPlansAxis |
| 2357 |
Defined benefit plans [member] |
Member |
|
|
ifrs-full:DefinedBenefitPlansMember |
| 2358 |
Other post-employment benefits |
Member |
|
|
mt:OtherPostEmploymentBenefitPlanMember |
| 2359 |
Disclosure of net defined benefit liability (asset) [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems |
| 2360 |
Current service cost |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset |
| 2361 |
Past service cost - Plan amendments |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PastServiceCostNetDefinedBenefitLiabilityAsset |
| 2362 |
Past service cost - Curtailments |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:GainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset |
| 2363 |
Net interest cost/(income) on net DB liability/(asset) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset |
| 2364 |
Actuarial (gains)/losses recognized during the year |
Concept (Monetary) |
For Period |
Debit |
mt:ActuarialGainsLossesNetDefinedBenefitLiabilityAsset |
| 2365 |
Total |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans |
| 2366 |
2441411 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Expenses Recognized in Income Statement (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsExpensesRecognizedInIncomeStatementDetails |
| 2367 |
Disclosure of defined benefit plans [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDefinedBenefitPlansTable |
| 2368 |
Defined benefit plans [axis] |
Axis |
|
|
ifrs-full:DefinedBenefitPlansAxis |
| 2369 |
Defined benefit plans [member] |
Member |
|
|
ifrs-full:DefinedBenefitPlansMember |
| 2370 |
Net periodic pension cost |
Member |
|
|
mt:DefinedBenefitPensionPlanMember |
| 2371 |
Net periodic OPEB cost |
Member |
|
|
mt:OtherPostEmploymentBenefitPlanMember |
| 2372 |
Income Statement Location1 [Axis] |
Axis |
|
|
mt:BalanceSheetLocation1Axis |
| 2373 |
Income Statement Location1 [Domain] |
Member |
|
|
mt:IncomeStatementLocation1Domain |
| 2374 |
Cost of sales |
Member |
|
|
mt:CostofSalesMember |
| 2375 |
Selling, general and administrative expenses |
Member |
|
|
mt:SellingGeneralandAdministrativeExpenseMember |
| 2376 |
Financing costs - net |
Member |
|
|
mt:FinancingCostsMember |
| 2377 |
Disclosure of defined benefit plans [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDefinedBenefitPlansLineItems |
| 2378 |
Total plan expense, net |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans |
| 2379 |
2441412 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Weighted Average Asset Allocation for the Funded Defined Benefit Pension Plans (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsWeightedAverageAssetAllocationForFundedDefinedBenefitPensionPlansDetails |
| 2380 |
Disclosure of fair value of plan assets [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFairValueOfPlanAssetsTable |
| 2381 |
Levels of fair value hierarchy [axis] |
Axis |
|
|
ifrs-full:LevelsOfFairValueHierarchyAxis |
| 2382 |
All levels of fair value hierarchy [member] |
Member |
|
|
ifrs-full:AllLevelsOfFairValueHierarchyMember |
| 2383 |
- Asset classes that have a quoted market price in an active market |
Member |
|
|
ifrs-full:Level1OfFairValueHierarchyMember |
| 2384 |
- Asset classes that do not have a quoted market price in an active market |
Member |
|
|
ifrs-full:Level2And3OfFairValueHierarchyMember |
| 2385 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 2386 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 2387 |
United States |
Member |
|
|
country:US |
| 2388 |
Canada |
Member |
|
|
country:CA |
| 2389 |
Brazil |
Member |
|
|
country:BR |
| 2390 |
Europe |
Member |
|
|
mt:Europe1Member |
| 2391 |
Other |
Member |
|
|
mt:OtherRegionsMember |
| 2392 |
Disclosure of fair value of plan assets [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFairValueOfPlanAssetsLineItems |
| 2393 |
Equity Securities |
Concept (Percent) |
As Of |
|
mt:EquityInstrumentsAmountContributedToFairValueOfPlanAssetsWeightedAverageAllocationPercentage |
| 2394 |
Fixed Income Securities (including cash) |
Concept (Percent) |
As Of |
|
mt:FixedIncomeSecuritiesIncludingCashAmountContributedToFairValueOfPlanAssetsWeightedAverageAllocationPercentage |
| 2395 |
Real Estate |
Concept (Percent) |
As Of |
|
mt:RealEstateAmountContributedToFairValueOfPlanAssetsWeightedAverageAllocationPercentage |
| 2396 |
Other |
Concept (Percent) |
As Of |
|
mt:OtherInstrumentsAmountContributedToFairValueOfPlanAssetsWeightedAverageAllocationPercentage |
| 2397 |
Total |
Concept (Percent) |
As Of |
|
mt:PlanAssetsAtFairValueAllocationPercentage |
| 2398 |
2441413 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Target Asset Allocation for the Funded Defined Benefit Pension Plans (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsTargetAssetAllocationForFundedDefinedBenefitPensionPlansDetails |
| 2399 |
Disclosure of fair value of plan assets [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFairValueOfPlanAssetsTable |
| 2400 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 2401 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 2402 |
United States |
Member |
|
|
country:US |
| 2403 |
Canada |
Member |
|
|
country:CA |
| 2404 |
Brazil |
Member |
|
|
country:BR |
| 2405 |
Europe |
Member |
|
|
mt:Europe1Member |
| 2406 |
Disclosure of fair value of plan assets [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFairValueOfPlanAssetsLineItems |
| 2407 |
Equity Securities |
Concept (Percent) |
As Of |
|
mt:EquityInstrumentsAmountContributedToFairValueOfPlanAssetsAssetTargetAllocationPercentage |
| 2408 |
Fixed Income Securities (including cash) |
Concept (Percent) |
As Of |
|
mt:FixedIncomeSecuritiesIncludingCashAmountContributedToFairValueOfPlanAssetsAssetTargetAllocationPercentage |
| 2409 |
Real Estate |
Concept (Percent) |
As Of |
|
mt:RealEstateAmountContributedToFairValueOfPlanAssetsAssetTargetAllocationPercentage |
| 2410 |
Other |
Concept (Percent) |
As Of |
|
mt:OtherInstrumentsAmountContributedToFairValueOfPlanAssetsAssetTargetAllocationPercentage |
| 2411 |
Total |
Concept (Percent) |
As Of |
|
mt:PlanAssetsAtFairValueAssetTargetAllocationPercentage |
| 2412 |
2441414 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Actuarial Assumptions for Defined Benefit Plans (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsActuarialAssumptionsForDefinedBenefitPlansDetails |
| 2413 |
Disclosure of sensitivity analysis for actuarial assumptions [table] |
Table |
* |
* |
ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable |
| 2414 |
Defined benefit plans [axis] |
Axis |
|
|
ifrs-full:DefinedBenefitPlansAxis |
| 2415 |
Defined benefit plans [member] |
Member |
|
|
ifrs-full:DefinedBenefitPlansMember |
| 2416 |
Defined benefit obligation |
Member |
|
|
mt:DefinedBenefitPensionPlanMember |
| 2417 |
Other post-employment benefits |
Member |
|
|
mt:OtherPostEmploymentBenefitPlanMember |
| 2418 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 2419 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 2420 |
Bottom of range |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 2421 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 2422 |
Weighted average |
Member |
|
|
ifrs-full:WeightedAverageMember |
| 2423 |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems |
| 2424 |
Discount rate |
Concept (Percent) |
As Of |
|
ifrs-full:ActuarialAssumptionOfDiscountRates |
| 2425 |
Rate of compensation increase |
Concept (Percent) |
As Of |
|
ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases |
| 2426 |
2441415 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Healthcare Cost Trend Rate (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsHealthcareCostTrendRateDetails |
| 2427 |
Disclosure of defined benefit plans [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDefinedBenefitPlansTable |
| 2428 |
Defined benefit plans [axis] |
Axis |
|
|
ifrs-full:DefinedBenefitPlansAxis |
| 2429 |
Defined benefit plans [member] |
Member |
|
|
ifrs-full:DefinedBenefitPlansMember |
| 2430 |
Other post-employment benefits |
Member |
|
|
mt:OtherPostEmploymentBenefitPlanMember |
| 2431 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 2432 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 2433 |
Bottom of range |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 2434 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 2435 |
Weighted average |
Member |
|
|
ifrs-full:WeightedAverageMember |
| 2436 |
Disclosure of defined benefit plans [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDefinedBenefitPlansLineItems |
| 2437 |
Healthcare cost trend rate assumed (as a percentage) |
Concept (Percent) |
As Of |
|
ifrs-full:ActuarialAssumptionOfMedicalCostTrendRates |
| 2438 |
2441416 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Sensitivity to a Change of the Significant Actuarial Assumptions (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsSensitivityToChangeOfSignificantActuarialAssumptionsDetails |
| 2439 |
Disclosure of sensitivity analysis for actuarial assumptions [table] |
Table |
* |
* |
ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable |
| 2440 |
Actuarial assumptions [axis] |
Axis |
|
|
ifrs-full:ActuarialAssumptionsAxis |
| 2441 |
Actuarial assumptions [member] |
Member |
|
|
ifrs-full:ActuarialAssumptionsMember |
| 2442 |
Discount rate |
Member |
|
|
ifrs-full:ActuarialAssumptionOfDiscountRatesMember |
| 2443 |
Rate of compensation |
Member |
|
|
ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreasesMember |
| 2444 |
Expected life of beneficiaries |
Member |
|
|
ifrs-full:ActuarialAssumptionOfMortalityRatesMember |
| 2445 |
Healthcare cost trend rate |
Member |
|
|
ifrs-full:ActuarialAssumptionOfMedicalCostTrendRatesMember |
| 2446 |
Net defined benefit liability (asset) [axis] |
Axis |
|
|
ifrs-full:NetDefinedBenefitLiabilityAssetAxis |
| 2447 |
Net defined benefit liability (asset) [member] |
Member |
|
|
ifrs-full:NetDefinedBenefitLiabilityAssetMember |
| 2448 |
Present value of defined benefit obligation |
Member |
|
|
ifrs-full:PresentValueOfDefinedBenefitObligationMember |
| 2449 |
Defined benefit plans [axis] |
Axis |
|
|
ifrs-full:DefinedBenefitPlansAxis |
| 2450 |
Defined benefit plans [member] |
Member |
|
|
ifrs-full:DefinedBenefitPlansMember |
| 2451 |
Defined benefit obligation |
Member |
|
|
mt:DefinedBenefitPensionPlanMember |
| 2452 |
Other post-employment benefits |
Member |
|
|
mt:OtherPostEmploymentBenefitPlanMember |
| 2453 |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems |
| 2454 |
Defined benefit obligation |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilityAssetOfDefinedBenefitPlans |
| 2455 |
Percentage of reasonably possible decrease in actuarial assumption |
Concept (Percent) |
As Of |
|
ifrs-full:PercentageOfReasonablyPossibleDecreaseInActuarialAssumption |
| 2456 |
Percentage of reasonably possible increase in actuarial assumption |
Concept (Percent) |
As Of |
|
ifrs-full:PercentageOfReasonablyPossibleIncreaseInActuarialAssumption |
| 2457 |
Duration of reasonably possible increase in actuarial assumption |
Concept (xbrli:durationItemType) |
For Period |
|
mt:DurationOfReasonablyPossibleIncreaseInActuarialAssumption |
| 2458 |
Increase (decrease) in pre-tax expense due to reasonably possible decrease in actuarial assumption |
Concept (Monetary) |
For Period |
Debit |
mt:IncreaseDecreaseInDefinedBenefitPlanExpenseDueToReasonablyPossibleDecreaseInActuarialAssumption |
| 2459 |
Increase (decrease) in pre-tax expense due to reasonably possible increase in actuarial assumption |
Concept (Monetary) |
For Period |
Debit |
mt:IncreaseDecreaseInDefinedBenefitPlanExpenseDueToReasonablyPossibleIncreaseInActuarialAssumption |
| 2460 |
Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption |
| 2461 |
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption |
| 2462 |
2441417 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Share Based Payments - Additional Information (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsShareBasedPaymentsAdditionalInformationDetails |
| 2463 |
Disclosure of terms and conditions of share-based payment arrangement [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable |
| 2464 |
Scenario [Axis] |
Axis |
|
|
mt:Scenario1Axis |
| 2465 |
Scenario [Domain] |
Member |
|
|
mt:ScenarioDomain |
| 2466 |
Pro Forma |
Member |
|
|
mt:ProForma1Member |
| 2467 |
Plan Name [Axis] |
Axis |
|
|
mt:PlanName1Axis |
| 2468 |
Plan Name [Domain] |
Member |
|
|
mt:PlanName1Domain |
| 2469 |
ArcelorMittal Global Stock Option 2009-2018 |
Member |
|
|
mt:ArcelorMittalGlobalStockOption20092018Member |
| 2470 |
ArcelorMittal Equity Incentive Plan and GMB PSU Plan |
Member |
|
|
mt:ArcelorMittalEquityIncentivePlanandGMBPSUPlanMember |
| 2471 |
CEO Office Plan |
Member |
|
|
mt:CEOOfficePlanMember |
| 2472 |
ArcelorMittal Equity Incentive Plan |
Member |
|
|
mt:ArcelorMittalEquityIncentivePlanMember |
| 2473 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 2474 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 2475 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 2476 |
Types of share-based payment arrangements [axis] |
Axis |
|
|
ifrs-full:TypesOfSharebasedPaymentArrangementsAxis |
| 2477 |
Share-based payment arrangements [member] |
Member |
|
|
ifrs-full:SharebasedPaymentArrangementsMember |
| 2478 |
Employee Stock Option |
Member |
|
|
mt:EmployeeStockOption1Member |
| 2479 |
Performance Share Units (PSUs) |
Member |
|
|
mt:PerformanceShareUnitsPSUMember |
| 2480 |
Restricted Share Units (RSUs) |
Member |
|
|
mt:RestrictedShareUnitsRSUMember |
| 2481 |
Restricted Share Units (RSUs) and Performance Share Units (PSUs) |
Member |
|
|
mt:RestrictedShareUnitsRSUAndPerformanceShareUnitsPSUMember |
| 2482 |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems |
| 2483 |
Number of shares authorized for grant |
Concept (Shares) |
As Of |
|
mt:SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharesAuthorized |
| 2484 |
Expiration period |
Concept (xbrli:durationItemType) |
For Period |
|
mt:SharebasedCompensationArrangementbySharebasedPaymentAwardExpirationPeriod |
| 2485 |
Number of share options granted in share-based payment arrangement |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement |
| 2486 |
Compensation expense |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees |
| 2487 |
Award vesting period (in years) |
Concept (xbrli:durationItemType) |
For Period |
|
mt:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingPeriod |
| 2488 |
Percentage of award vesting rights (as a percentage) |
Concept (Percent) |
For Period |
|
mt:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentage |
| 2489 |
2441418 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Dates of Grant and Exercise Prices (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsDatesOfGrantAndExercisePricesDetails |
| 2490 |
Implied Table |
Table |
* |
* |
implied:Table |
| 2491 |
Employee Benefits [Abstract] |
Abstract |
|
|
mt:EmployeeBenefitsAbstract |
| 2492 |
Exercise prices (per option) |
Concept (Monetary) |
For Period |
|
ifrs-full:WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement |
| 2493 |
2441419 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Changes in Stock Options Issued (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsChangesInStockOptionsIssuedDetails |
| 2494 |
Disclosure of range of exercise prices of outstanding share options [table] |
Table |
* |
* |
ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsTable |
| 2495 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 2496 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 2497 |
Bottom of range |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 2498 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 2499 |
Disclosure of range of exercise prices of outstanding share options [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems |
| 2500 |
Number of share options outstanding (in shares) |
Concept (Decimal) |
As Of |
|
ifrs-full:NumberOfOutstandingShareOptions |
| 2501 |
Number of share options expired (in shares) |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfShareOptionsExpiredInSharebasedPaymentArrangement |
| 2502 |
Number of share options outstanding (in shares) |
Concept (Decimal) |
As Of |
|
ifrs-full:NumberOfOutstandingShareOptions |
| 2503 |
Number of share options exercisable (in shares) |
Concept (Decimal) |
As Of |
|
ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement |
| 2504 |
Exercise price of outstanding share options (in USD per share) |
Concept (Monetary) |
As Of |
|
ifrs-full:ExercisePriceOfOutstandingShareOptions |
| 2505 |
Exercise price of expired share options (in USD per share) |
Concept (Share) |
For Period |
|
mt:ExercisePriceOfExpiredShareOptions |
| 2506 |
Exercise price of exercisable share options (in USD per share) |
Concept (Share) |
For Period |
|
mt:ExercisePriceOfExercisableShareOptions |
| 2507 |
Weighted average exercise price of share options outstanding (in USD per share) |
Concept (Monetary) |
As Of |
|
ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement |
| 2508 |
Weighted average exercise price of share options expired (in USD per share) |
Concept (Monetary) |
For Period |
|
ifrs-full:WeightedAverageExercisePriceOfShareOptionsExpiredInSharebasedPaymentArrangement |
| 2509 |
Weighted average exercise price of share options outstanding (in USD per share) |
Concept (Monetary) |
As Of |
|
ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement |
| 2510 |
Weighted average exercise price of share options exercisable (in USD per share) |
Concept (Monetary) |
As Of |
|
ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement |
| 2511 |
2441420 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Disclosure of Total Stock Options (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsDisclosureOfTotalStockOptionsDetails |
| 2512 |
Disclosure of range of exercise prices of outstanding share options [table] |
Table |
* |
* |
ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsTable |
| 2513 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 2514 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 2515 |
Bottom of range |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 2516 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 2517 |
Ranges of exercise prices for outstanding share options [axis] |
Axis |
|
|
ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsAxis |
| 2518 |
Ranges of exercise prices for outstanding share options [member] |
Member |
|
|
ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsMember |
| 2519 |
Maturing August 3, 2020 |
Member |
|
|
mt:ExercisePriceRangeOneMaturingAugust32020Member |
| 2520 |
Maturing August 4, 2019 |
Member |
|
|
mt:ExercisePriceRangeTwoMaturingAugust42019Member |
| 2521 |
Disclosure of range of exercise prices of outstanding share options [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems |
| 2522 |
Exercise price of outstanding share options (in USD per share) |
Concept (Monetary) |
As Of |
|
ifrs-full:ExercisePriceOfOutstandingShareOptions |
| 2523 |
Number of options |
Concept (Decimal) |
As Of |
|
ifrs-full:NumberOfOutstandingShareOptions |
| 2524 |
Weighted average contractual life (in years) |
Concept (xbrli:durationItemType) |
For Period |
|
mt:Weightedaverageremainingcontractuallifeofoutstandingshareoptions1 |
| 2525 |
Options exercisable (number of options) |
Concept (Decimal) |
As Of |
|
ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement |
| 2526 |
2441421 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Terms and Conditions of Grants (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsTermsAndConditionsOfGrantsDetails |
| 2527 |
Disclosure of terms and conditions of share-based payment arrangement [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable |
| 2528 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 2529 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 2530 |
Bottom of range |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 2531 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 2532 |
Title of Individual [Axis] |
Axis |
|
|
mt:TitleofIndividualAxis |
| 2533 |
Title of Individual [Domain] |
Member |
|
|
mt:TitleofIndividualDomain |
| 2534 |
CEO |
Member |
|
|
mt:ChiefExecutiveOfficer1Member |
| 2535 |
CFO |
Member |
|
|
mt:ChiefFinancialOfficer1Member |
| 2536 |
Vesting [Axis] |
Axis |
|
|
mt:Vesting1Axis |
| 2537 |
Vesting [Domain] |
Member |
|
|
mt:Vesting1Domain |
| 2538 |
EPS vs Peer Group, Threshold |
Member |
|
|
mt:VestingBasedonEPSComparedToPeerGroupThresholdLevelMember |
| 2539 |
EPS vs Peer Group, Target |
Member |
|
|
mt:VestingBasedonEPSComparedToPeerGroupTargetLevelMember |
| 2540 |
EPS vs Peer Group, Stretch |
Member |
|
|
mt:VestingBasedonEPSComparedToPeerGroupStretchLevelMember |
| 2541 |
TSR vs Performance Index, Threshold |
Member |
|
|
mt:VestingBasedonTSRComparedToPerformanceIndexThresholdLevelMember |
| 2542 |
TSR vs Performance Index, Target |
Member |
|
|
mt:VestingBasedonTSRComparedToPerformanceIndexTargetLevelMember |
| 2543 |
TSR vs Performance Index, Stretch |
Member |
|
|
mt:VestingBasedonTSRComparedToPerformanceIndexStretchLevelMember |
| 2544 |
Performance of ROCE and Gap to Competition, Target |
Member |
|
|
mt:VestingBasedOnPerformanceOfROCEAndGapToCompetitionTargetLevelMember |
| 2545 |
Gap to Competition, Target |
Member |
|
|
mt:VestingBasedonGapToCompetitionTargetLevelMember |
| 2546 |
Performance of ROCE and Mining Segment, Threshold |
Member |
|
|
mt:VestingBasedOnPerformanceOfROCEAndMiningSegmentThresholdLevelMember |
| 2547 |
Performance of ROCE and Mining Segment, Target |
Member |
|
|
mt:VestingBasedOnPerformanceOfROCEAndMiningSegmentTargetLevelMember |
| 2548 |
Performance of ROCE and Mining Segment, Stretch |
Member |
|
|
mt:VestingBasedOnPerformanceOfROCEAndMiningSegmentStretchLevelMember |
| 2549 |
Performance of ROCE and Gap to Competition, Threshold |
Member |
|
|
mt:VestingBasedOnPerformanceOfROCEAndGapToCompetitionThresholdLevelMember |
| 2550 |
Vesting period one |
Member |
|
|
mt:VestingBasedOnVestingPeriodPeriodOneMember |
| 2551 |
Vesting period two |
Member |
|
|
mt:VestingBasedOnVestingPeriodPeriodTwoMember |
| 2552 |
TSR vs. Peer Group, Threshold |
Member |
|
|
mt:VestingBasedonTSRComparedToPeerGroupThresholdLevelMember |
| 2553 |
TSR vs Peer Group, Target |
Member |
|
|
mt:VestingBasedonTSRComparedToPeerGroupTargetLevelMember |
| 2554 |
Plan Name [Axis] |
Axis |
|
|
mt:PlanName1Axis |
| 2555 |
Plan Name [Domain] |
Member |
|
|
mt:PlanName1Domain |
| 2556 |
CEO Office Plan |
Member |
|
|
mt:CEOOfficePlanMember |
| 2557 |
Executive Officers and other qualifying employees |
Member |
|
|
mt:ExecutiveOfficersPlanMember |
| 2558 |
Types of share-based payment arrangements [axis] |
Axis |
|
|
ifrs-full:TypesOfSharebasedPaymentArrangementsAxis |
| 2559 |
Share-based payment arrangements [member] |
Member |
|
|
ifrs-full:SharebasedPaymentArrangementsMember |
| 2560 |
Performance Share Units (PSUs) |
Member |
|
|
mt:PerformanceShareUnitsPSUMember |
| 2561 |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems |
| 2562 |
Award performance period |
Concept (xbrli:durationItemType) |
For Period |
|
mt:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardPerformancePeriod |
| 2563 |
Award vesting period (in years) |
Concept (xbrli:durationItemType) |
For Period |
|
mt:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingPeriod |
| 2564 |
Award vesting performance, threshold percentage |
Concept (Percent) |
For Period |
|
mt:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPerformanceThresholdPercentage |
| 2565 |
Percentage of target in over-performance grant |
Concept (Percent) |
For Period |
|
mt:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPerformanceTargetPercentage |
| 2566 |
Percentage of performance better than the index per annum over performance |
Concept (Percent) |
For Period |
|
mt:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentageOfPerformanceOverIndexPerAnnumOverPerformance |
| 2567 |
Percentage of award vesting rights (as a percentage) |
Concept (Percent) |
For Period |
|
mt:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsPercentage |
| 2568 |
Over-performance award, percent |
Concept (Percent) |
For Period |
|
mt:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsOverPerformanceAwardPercent |
| 2569 |
Over-performance award, percent of target |
Concept (Percent) |
For Period |
|
mt:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsOverPerformanceAwardPercentOfTarget |
| 2570 |
Value of grant at grant date, percentage of base salary |
Concept (Percent) |
For Period |
|
mt:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantAmountAsBaseSalaryPercentage |
| 2571 |
Number of other equity instruments vested |
Concept (Shares) |
For Period |
|
mt:SharebasedCompensationArrangementbySharebasedPaymentAwardAwardVestingRightsNumberOfSharesCalledByEachAward |
| 2572 |
2441422 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Summary of Share Unit Plans Outstanding (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsSummaryOfShareUnitPlansOutstandingDetails |
| 2573 |
Disclosure of terms and conditions of share-based payment arrangement [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable |
| 2574 |
Award Date [Axis] |
Axis |
|
|
mt:AwardDate1Axis |
| 2575 |
Award Date [Domain] |
Member |
|
|
mt:AwardDate1Domain |
| 2576 |
Grant date December 20, 2018, Maturity due January 1, 2022 |
Member |
|
|
mt:GrantdateDecember202018MaturitydueJanuary12022Member |
| 2577 |
Grant date December 20, 2017, Maturity due January 1, 2021 |
Member |
|
|
mt:GrantdateDecember202017MaturitydueJanuary12021Member |
| 2578 |
Grant date June 30, 2016, Maturity due January 1, 2021 |
Member |
|
|
mt:GrantdateJune302016MaturitydueJanuary12021Member |
| 2579 |
Grant date June 30, 2016, Maturity due January 1, 2022 |
Member |
|
|
mt:GrantdateJune302016MaturitydueJanuary12022Member |
| 2580 |
Grant date June 30, 2016, Maturity due January 1, 2019 |
Member |
|
|
mt:GrantdateJune302016MaturitydueJanuary12019Member |
| 2581 |
Grant date June 30, 2016, Maturity due January 1, 2020 |
Member |
|
|
mt:GrantdateJune302016MaturitydueJanuary12020Member |
| 2582 |
Grant date December 18, 2015, Maturity due January 1, 2019 |
Member |
|
|
mt:GrantdateDecember182015MaturitydueJanuary12019Member |
| 2583 |
Types of share-based payment arrangements [axis] |
Axis |
|
|
ifrs-full:TypesOfSharebasedPaymentArrangementsAxis |
| 2584 |
Share-based payment arrangements [member] |
Member |
|
|
ifrs-full:SharebasedPaymentArrangementsMember |
| 2585 |
PSU |
Member |
|
|
mt:PerformanceShareUnitsPSUMember |
| 2586 |
CEO Office Plan |
Member |
|
|
mt:CEOOfficePlanMember |
| 2587 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 2588 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 2589 |
Bottom of range |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 2590 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 2591 |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems |
| 2592 |
Number of shares granted (in shares) |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted |
| 2593 |
Number of beneficiaries |
Concept (Integer) |
For Period |
|
mt:NumberOfBeneficiaries |
| 2594 |
Fair value price per granted share (USD per share) |
Concept (Share) |
For Period |
|
mt:OtherEquityInstrumentsGrantedInSharebasedPaymentArrangementFairValuePricePerShare |
| 2595 |
Number of shares outstanding (in shares) |
Concept (Decimal) |
As Of |
|
ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement |
| 2596 |
Number of shares exited (in shares) |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement |
| 2597 |
Number of shares forfeited (in shares) |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement |
| 2598 |
2441423 - Disclosure - PERSONNEL EXPENSES AND DEFERRED EMPLOYEE BENEFITS - Share Unit Plan Activity (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/PersonnelExpensesAndDeferredEmployeeBenefitsShareUnitPlanActivityDetails |
| 2599 |
Disclosure of terms and conditions of share-based payment arrangement [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable |
| 2600 |
Types of share-based payment arrangements [axis] |
Axis |
|
|
ifrs-full:TypesOfSharebasedPaymentArrangementsAxis |
| 2601 |
Share-based payment arrangements [member] |
Member |
|
|
ifrs-full:SharebasedPaymentArrangementsMember |
| 2602 |
Restricted Share Units (RSUs) |
Member |
|
|
mt:RestrictedShareUnitsRSUMember |
| 2603 |
Performance Share Units (PSUs) |
Member |
|
|
mt:PerformanceShareUnitsPSUMember |
| 2604 |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems |
| 2605 |
Number of shares, Outstanding, beginning balance (in shares) |
Concept (Decimal) |
As Of |
|
ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement |
| 2606 |
Number of shares, Granted (in shares) |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted |
| 2607 |
Number of shares, Exited (in shares) |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement |
| 2608 |
Number of shares, Forfeited (in shares) |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement |
| 2609 |
Number of shares, Outstanding, ending balance (in shares) |
Concept (Decimal) |
As Of |
|
ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement |
| 2610 |
Fair value per share, Outstanding, beginning balance (USD per share) |
Concept (Share) |
As Of |
|
mt:OtherEquityInstrumentsOutstandingInSharebasedPaymentArrangementFairValuePricePerShare |
| 2611 |
Fair value per share, Granted (USD per share) |
Concept (Share) |
For Period |
|
mt:OtherEquityInstrumentsGrantedInSharebasedPaymentArrangementFairValuePricePerShare |
| 2612 |
Fair value per share, Exited (USD per share) |
Concept (Share) |
For Period |
|
mt:OtherEquityInstrumentsExitedInSharebasedPaymentArrangementFairValuePricePerShare |
| 2613 |
Fair value per share, Forfeited (USD per share) |
Concept (Share) |
For Period |
|
mt:OtherEquityInstrumentsForfeitedInSharebasedPaymentArrangementFairValuePricePerShare |
| 2614 |
Fair value per share, Outstanding, ending balance (USD per share) |
Concept (Share) |
As Of |
|
mt:OtherEquityInstrumentsOutstandingInSharebasedPaymentArrangementFairValuePricePerShare |
| 2615 |
2442402 - Disclosure - PROVISIONS, CONTINGENCIES AND COMMITMENTS - Provisions Overview (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ProvisionsContingenciesAndCommitmentsProvisionsOverviewDetails |
| 2616 |
Disclosure of other provisions [table] |
Table |
* |
* |
ifrs-full:DisclosureOfOtherProvisionsTable |
| 2617 |
Classes of other provisions [axis] |
Axis |
|
|
ifrs-full:ClassesOfProvisionsAxis |
| 2618 |
Other provisions [member] |
Member |
|
|
ifrs-full:OtherProvisionsMember |
| 2619 |
Environmental |
Member |
|
|
ifrs-full:OtherEnvironmentRelatedProvisionMember |
| 2620 |
Asset retirement obligations |
Member |
|
|
mt:AssetRetirementObligationsMember |
| 2621 |
Site restoration |
Member |
|
|
ifrs-full:ProvisionForDecommissioningRestorationAndRehabilitationCostsMember |
| 2622 |
Staff related obligations |
Member |
|
|
mt:StaffRelatedObligationsMember |
| 2623 |
Voluntary separation plans |
Member |
|
|
mt:VoluntarySeparationPlansMember |
| 2624 |
Litigation and other |
Member |
|
|
ifrs-full:LegalProceedingsProvisionMember |
| 2625 |
Tax claims |
Member |
|
|
ifrs-full:ProvisionForTaxesOtherThanIncomeTaxMember |
| 2626 |
Other legal claims |
Member |
|
|
mt:OtherLegalClaimsMember |
| 2627 |
Commercial agreements and onerous contracts |
Member |
|
|
ifrs-full:OnerousContractsProvisionMember |
| 2628 |
Other |
Member |
|
|
ifrs-full:MiscellaneousOtherProvisionsMember |
| 2629 |
Disclosure of other provisions [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfOtherProvisionsLineItems |
| 2630 |
Changes in other provisions [abstract] |
Abstract |
|
|
ifrs-full:ChangesInOtherProvisionsAbstract |
| 2631 |
Provisions, beginning balance |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherProvisions |
| 2632 |
Additions |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:AdditionalProvisionsOtherProvisions |
| 2633 |
Deductions/ Payments |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProvisionUsedOtherProvisions |
| 2634 |
Effects of foreign exchange and other movements |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions |
| 2635 |
Provisions, ending balance |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherProvisions |
| 2636 |
Short-term provisions |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherShorttermProvisions |
| 2637 |
Long-term provisions |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherLongtermProvisions |
| 2638 |
2442403 - Disclosure - PROVISIONS, CONTINGENCIES AND COMMITMENTS - Provisions Overview - Additional Information (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ProvisionsContingenciesAndCommitmentsProvisionsOverviewAdditionalInformationDetails |
| 2639 |
Disclosure of other provisions [table] |
Table |
* |
* |
ifrs-full:DisclosureOfOtherProvisionsTable |
| 2640 |
Classes of other provisions [axis] |
Axis |
|
|
ifrs-full:ClassesOfProvisionsAxis |
| 2641 |
Other provisions [member] |
Member |
|
|
ifrs-full:OtherProvisionsMember |
| 2642 |
Site restoration |
Member |
|
|
ifrs-full:ProvisionForDecommissioningRestorationAndRehabilitationCostsMember |
| 2643 |
Disclosure of other provisions [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfOtherProvisionsLineItems |
| 2644 |
Additional provisions |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:AdditionalProvisionsOtherProvisions |
| 2645 |
2442404 - Disclosure - PROVISIONS, CONTINGENCIES AND COMMITMENTS - Other Long-Term Obligations (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ProvisionsContingenciesAndCommitmentsOtherLongTermObligationsDetails |
| 2646 |
Disclosure of detailed information about business combination [table] |
Table |
* |
* |
ifrs-full:DisclosureOfBusinessCombinationsTable |
| 2647 |
Levels of fair value hierarchy [axis] |
Axis |
|
|
ifrs-full:LevelsOfFairValueHierarchyAxis |
| 2648 |
All levels of fair value hierarchy [member] |
Member |
|
|
ifrs-full:AllLevelsOfFairValueHierarchyMember |
| 2649 |
Level 3 |
Member |
|
|
ifrs-full:Level3OfFairValueHierarchyMember |
| 2650 |
Classes of financial instruments [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialInstrumentsAxis |
| 2651 |
Financial instruments, class [member] |
Member |
|
|
ifrs-full:ClassesOfFinancialInstrumentsMember |
| 2652 |
Call options |
Member |
|
|
ifrs-full:PurchasedCallOptionsMember |
| 2653 |
Business combinations [axis] |
Axis |
|
|
ifrs-full:BusinessCombinationsAxis |
| 2654 |
Entity's total for business combinations [member] |
Member |
|
|
ifrs-full:EntitysTotalForBusinessCombinationsMember |
| 2655 |
Votorantim S.A. |
Member |
|
|
mt:VotorantimSiderurgiaMember |
| 2656 |
Ilva |
Member |
|
|
mt:IlvaS.p.A.Member |
| 2657 |
Disclosure of detailed information about business combination [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfBusinessCombinationsLineItems |
| 2658 |
Derivative financial instruments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentDerivativeFinancialLiabilities |
| 2659 |
Payable from acquisitions |
Concept (Monetary) |
As Of |
Credit |
mt:ConsiderationPayableNonCurrent |
| 2660 |
Unfavorable contracts |
Concept (Monetary) |
As Of |
Credit |
mt:OtherNonCurrentLiabilitiesUnfavorableContracts |
| 2661 |
Other |
Concept (Monetary) |
As Of |
Credit |
mt:OtherNonCurrentLiabilitiesOther |
| 2662 |
Total |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherNoncurrentLiabilities |
| 2663 |
2442405 - Disclosure - PROVISIONS, CONTINGENCIES AND COMMITMENTS - Environmental Liabilities (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ProvisionsContingenciesAndCommitmentsEnvironmentalLiabilitiesDetails |
| 2664 |
Disclosure of other provisions [table] |
Table |
* |
* |
ifrs-full:DisclosureOfOtherProvisionsTable |
| 2665 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 2666 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 2667 |
Total Europe |
Member |
|
|
mt:Europe1Member |
| 2668 |
United States |
Member |
|
|
country:US |
| 2669 |
South Africa |
Member |
|
|
country:ZA |
| 2670 |
Canada |
Member |
|
|
country:CA |
| 2671 |
France |
Member |
|
|
country:FR |
| 2672 |
Belgium |
Member |
|
|
country:BE |
| 2673 |
Luxembourg |
Member |
|
|
country:LU |
| 2674 |
Poland |
Member |
|
|
country:PL |
| 2675 |
Germany |
Member |
|
|
country:DE |
| 2676 |
Italy |
Member |
|
|
country:IT |
| 2677 |
Spain |
Member |
|
|
country:ES |
| 2678 |
Classes of other provisions [axis] |
Axis |
|
|
ifrs-full:ClassesOfProvisionsAxis |
| 2679 |
Other provisions [member] |
Member |
|
|
ifrs-full:OtherProvisionsMember |
| 2680 |
Other environment related provision [member] |
Member |
|
|
ifrs-full:OtherEnvironmentRelatedProvisionMember |
| 2681 |
Removal and Disposal of Asbestos-Containing Materials and Polychlorinated Biphenyls |
Member |
|
|
mt:RemovalandDisposalofAsbestosContainingMaterialsandPolychlorinatedBiphenylsMember |
| 2682 |
Sediment Assessment and Remediation |
Member |
|
|
mt:SedimentAssessmentandRemediationMember |
| 2683 |
RCRA Corrective Action |
Member |
|
|
mt:RCRACorrectiveActionMember |
| 2684 |
Anticipated Remediation and Post-Remediation Activities |
Member |
|
|
mt:AnticipatedRemediationandPostRemediationActivitiesMember |
| 2685 |
Provision for Treatment of Acid Mine Drainage |
Member |
|
|
mt:ProvisionforTreatmentofAcidMineDrainageMember |
| 2686 |
Provisions Related To Clean Air Act’s Prevention Of Significant Deterioration |
Member |
|
|
mt:ProvisionsRelatedToCleanAirActsPreventionOfSignificantDeteriorationMember |
| 2687 |
Air Compliance Issues |
Member |
|
|
mt:AirComplianceIssuesMember |
| 2688 |
ArcelorMittal Luxembourg Various Site Clean Up |
Member |
|
|
mt:WaterPondAndProductionSiteCleanUpMember |
| 2689 |
Historical Landfill Cleanup ArcelorMittal Belval and Differdange |
Member |
|
|
mt:HistoricalLandfillCleanupMember |
| 2690 |
Former Activity Clean Up ArcelorMittal Bissen & Bettembourg |
Member |
|
|
mt:FormerActivityCleanUpMember |
| 2691 |
Provision for Implementation of Measures in Relation to Historical Pollution of Soil and Groundwater |
Member |
|
|
mt:ProvisionForImplementationOfMeasuresInRelationToHistoricalPollutionOfSoilAndGroundwaterMember |
| 2692 |
Remediating Toxic Sediment |
Member |
|
|
mt:RemediatingToxicSedimentMember |
| 2693 |
Sludge Removal at Contrecoeur |
Member |
|
|
mt:FutureDisposalOfSludgeMember |
| 2694 |
Provision for decommissioning, restoration and rehabilitation costs |
Member |
|
|
ifrs-full:ProvisionForDecommissioningRestorationAndRehabilitationCostsMember |
| 2695 |
Legal Entity [Axis] |
Axis |
|
|
dei:LegalEntityAxis |
| 2696 |
Entity [Domain] |
Member |
|
|
dei:EntityDomain |
| 2697 |
ArcelorMittal Monessen |
Member |
|
|
mt:ArcelorMittalMonessenMember |
| 2698 |
Environmental Remediation Site [Axis] |
Axis |
|
|
mt:EnvironmentalRemediationSite1Axis |
| 2699 |
Environmental Remediation Site [Domain] |
Member |
|
|
mt:EnvironmentalRemediationSite1Domain |
| 2700 |
Ehlerange Site |
Member |
|
|
mt:EhlerangeSiteMember |
| 2701 |
Differdange Site |
Member |
|
|
mt:DifferdangeSiteMember |
| 2702 |
Taranto Site |
Member |
|
|
mt:TarantoSiteMember |
| 2703 |
Pretoria Works Site |
Member |
|
|
mt:PretoriaWorksSiteMember |
| 2704 |
Vanderbijlpark Works Site |
Member |
|
|
mt:VanderbijlparkWorksSiteMember |
| 2705 |
Newcastle Works Site |
Member |
|
|
mt:NewcastleWorksSiteMember |
| 2706 |
Thabazimbi Mine |
Member |
|
|
mt:ThabazimbiMineMember |
| 2707 |
Vereeniging Site |
Member |
|
|
mt:VereenigingSiteMember |
| 2708 |
Disclosure of other provisions [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfOtherProvisionsLineItems |
| 2709 |
Provisions |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherProvisions |
| 2710 |
Expected provision payment |
Concept (Monetary) |
As Of |
Credit |
mt:OtherProvisionsExpectedProvisionToBeUsed |
| 2711 |
Estimated financial effect of contingent assets |
Concept (Monetary) |
As Of |
|
ifrs-full:EstimatedFinancialEffectOfContingentAssets |
| 2712 |
Damages sought, penalties accrued |
Concept (Monetary) |
As Of |
Credit |
mt:LossContingencyDamagesSoughtPenaltiesAccrued |
| 2713 |
Payments for settlements |
Concept (Monetary) |
For Period |
Credit |
mt:PaymentsforLegalSettlements |
| 2714 |
Area of land sold |
Concept (num:areaItemType) |
For Period |
|
mt:AreaofLandSold |
| 2715 |
Volume of materials to be moved to other sites |
Concept (num:volumeItemType) |
As Of |
|
mt:EnvironmentalExitCostsVolumeOfMaterialToBeMovedToOtherSites |
| 2716 |
Environmental trust investments acquired |
Concept (Monetary) |
As Of |
Debit |
mt:EnvironmentalTrustInvestmentsAcquired |
| 2717 |
Term of environmental provisions |
Concept (xbrli:durationItemType) |
For Period |
|
mt:ExpectedTimingOfOutflowsOtherProvisions |
| 2718 |
Term of operation |
Concept (xbrli:durationItemType) |
For Period |
|
mt:SiteContingencyTermOfSiteOperation |
| 2719 |
Increase in existing provisions, other provisions |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseInExistingProvisionsOtherProvisions |
| 2720 |
2442406 - Disclosure - PROVISIONS, CONTINGENCIES AND COMMITMENTS - Asset Retirement Obligation (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ProvisionsContingenciesAndCommitmentsAssetRetirementObligationDetails |
| 2721 |
Disclosure of other provisions [table] |
Table |
* |
* |
ifrs-full:DisclosureOfOtherProvisionsTable |
| 2722 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 2723 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 2724 |
Ukraine |
Member |
|
|
country:UA |
| 2725 |
Canada |
Member |
|
|
country:CA |
| 2726 |
United States |
Member |
|
|
country:US |
| 2727 |
Mexico |
Member |
|
|
country:MX |
| 2728 |
Belgium |
Member |
|
|
country:BE |
| 2729 |
Germany |
Member |
|
|
country:DE |
| 2730 |
South Africa |
Member |
|
|
country:ZA |
| 2731 |
Spain |
Member |
|
|
country:ES |
| 2732 |
Brazil |
Member |
|
|
country:BR |
| 2733 |
Kazakhstan |
Member |
|
|
country:KZ |
| 2734 |
Liberia |
Member |
|
|
country:LR |
| 2735 |
Classes of other provisions [axis] |
Axis |
|
|
ifrs-full:ClassesOfProvisionsAxis |
| 2736 |
Other provisions [member] |
Member |
|
|
ifrs-full:OtherProvisionsMember |
| 2737 |
Asset retirement obligations |
Member |
|
|
mt:AssetRetirementObligationsMember |
| 2738 |
Disclosure of other provisions [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfOtherProvisionsLineItems |
| 2739 |
Provisions |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherProvisions |
| 2740 |
2442407 - Disclosure - PROVISIONS, CONTINGENCIES AND COMMITMENTS - Tax Claims (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ProvisionsContingenciesAndCommitmentsTaxClaimsDetails |
| 2741 |
Disclosure of other provisions [table] |
Table |
* |
* |
ifrs-full:DisclosureOfOtherProvisionsTable |
| 2742 |
Tax Period [Axis] |
Axis |
|
|
mt:TaxPeriod1Axis |
| 2743 |
Tax Period [Domain] |
Member |
|
|
mt:TaxPeriod1Domain |
| 2744 |
Tax Year 2008 |
Member |
|
|
mt:TaxYear2008Member |
| 2745 |
Tax Year 2007 |
Member |
|
|
mt:TaxYear2007Member |
| 2746 |
Tax Year 2009 |
Member |
|
|
mt:TaxYear2009Member |
| 2747 |
Legal Entity [Axis] |
Axis |
|
|
dei:LegalEntityAxis |
| 2748 |
Entity [Domain] |
Member |
|
|
dei:EntityDomain |
| 2749 |
ArcelorMittal Brasil S.A. |
Member |
|
|
mt:ArcelorMittalBrasilS.A.Member |
| 2750 |
SOL Coqueria Tubarão S.A. |
Member |
|
|
mt:SOLCoqueriaTubaroS.A.Member |
| 2751 |
Comércio Exterior S.A. |
Member |
|
|
mt:ComrcioExteriorS.A.Member |
| 2752 |
Corporate Income Tax and Social Contributions on Net Profits |
Member |
|
|
mt:CorporateIncomeTaxandIncorrectDeductionsofInterestandCertainPaymentsMember |
| 2753 |
ArcelorMittal Comercializadora de Energia |
Member |
|
|
mt:ArcelorMittalComercializadoradeEnergiaMember |
| 2754 |
ArcelorMittal France |
Member |
|
|
mt:ArcelorMittalFranceMember |
| 2755 |
ArcelorMittal México S.A. de C.V. |
Member |
|
|
mt:ArcelorMittalMexicoS.A.deC.V.Member |
| 2756 |
ArcelorMittal Las Truchas |
Member |
|
|
mt:ArcelorMittalLasTruchasMember |
| 2757 |
Classes of other provisions [axis] |
Axis |
|
|
ifrs-full:ClassesOfProvisionsAxis |
| 2758 |
Other provisions [member] |
Member |
|
|
ifrs-full:OtherProvisionsMember |
| 2759 |
Tax claims |
Member |
|
|
ifrs-full:ProvisionForTaxesOtherThanIncomeTaxMember |
| 2760 |
Deductions for SUDENE Certificates |
Member |
|
|
mt:DeductionsforSUDENECertificatesMember |
| 2761 |
Value Added Tax |
Member |
|
|
mt:ValueAddedTaxMember |
| 2762 |
Corporate Income Tax and Social Contributions on Net Profits |
Member |
|
|
mt:CorporateIncomeTaxandIncorrectDeductionsofInterestandCertainPaymentsMember |
| 2763 |
Tax Assessments Related to Amortization of Goodwill |
Member |
|
|
mt:TaxAssessmentsRelatedToAmortizationOfGoodwillMember |
| 2764 |
Lawsuit Against Federal Revenue Related To Tax For Additional Freight For Renewal Of Brazilian Merchant Navy |
Member |
|
|
mt:LawsuitAgainstFederalRevenueRelatedToTaxForAdditionalFreightForRenewalOfBrazilianMerchantNavyMember |
| 2765 |
Credits for Social Security Taxes |
Member |
|
|
mt:CreditsforSocialSecurityTaxesMember |
| 2766 |
Tax Credits on Interstate Sales of Electricity |
Member |
|
|
mt:TaxCreditsonInterstateSalesofElectricityMember |
| 2767 |
Retroactive Application of New Law |
Member |
|
|
mt:RetroactiveApplicationofNewLawMember |
| 2768 |
Social Contribution |
Member |
|
|
mt:SocialContributionOnProfitSharingSchemesProfessionalFeesStockOptionsAndOtherMember |
| 2769 |
Social Contribution - Profit Sharing Schemes |
Member |
|
|
mt:SocialContributionProfitSharingSchemesMember |
| 2770 |
Social Contribution - Stock Options |
Member |
|
|
mt:SocialContributionStockOptionsMember |
| 2771 |
Social Contribution - Professional Fees |
Member |
|
|
mt:SocialContributionProfessionalFeesMember |
| 2772 |
Disclosure of other provisions [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfOtherProvisionsLineItems |
| 2773 |
Provisions |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherProvisions |
| 2774 |
Damages sought |
Concept (Monetary) |
For Period |
Debit |
mt:LossContingencyDamagesSoughtValue1 |
| 2775 |
Damages sought, penalties accrued |
Concept (Monetary) |
As Of |
Credit |
mt:LossContingencyDamagesSoughtPenaltiesAccrued |
| 2776 |
Number of tax assessments or claims |
Concept (Integer) |
For Period |
|
mt:LossContingencyNewClaimsFiledNumber1 |
| 2777 |
Number of unfavorable tax assessments or claims |
Concept (Integer) |
For Period |
|
mt:LossContingencyClaimsSettledUnfavorablyNumber |
| 2778 |
Number of claims pending |
Concept (Integer) |
For Period |
|
mt:LossContingencyPendingClaimsNumber1 |
| 2779 |
Tax assessment penalty |
Concept (Monetary) |
For Period |
Debit |
mt:LossContingencyTaxPenaltySought |
| 2780 |
Possible write off of net operating loss carryforward |
Concept (Monetary) |
For Period |
Debit |
mt:LossContingencyPossibleWriteoffOfNetOperatingLossCarryforwardAmount |
| 2781 |
Lawsuit period |
Concept (xbrli:durationItemType) |
For Period |
|
mt:LossContingencyLawsuitPeriod |
| 2782 |
Deposit held, amount |
Concept (Monetary) |
As Of |
Debit |
mt:LossContingencyDepositHeldAmount |
| 2783 |
Reduction in tax assesment |
Concept (Monetary) |
For Period |
Credit |
mt:LossContingencyReductioninDamagesSought |
| 2784 |
2442408 - Disclosure - PROVISIONS, CONTINGENCIES AND COMMITMENTS - Competition and Antitrust Claims (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ProvisionsContingenciesAndCommitmentsCompetitionAndAntitrustClaimsDetails |
| 2785 |
Disclosure of other provisions [table] |
Table |
* |
* |
ifrs-full:DisclosureOfOtherProvisionsTable |
| 2786 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 2787 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 2788 |
South Africa |
Member |
|
|
country:ZA |
| 2789 |
Germany |
Member |
|
|
country:DE |
| 2790 |
Legal Entity [Axis] |
Axis |
|
|
dei:LegalEntityAxis |
| 2791 |
Entity [Domain] |
Member |
|
|
dei:EntityDomain |
| 2792 |
ArcelorMittal USA LLC |
Member |
|
|
mt:ArcelorMittalUSALLCMember |
| 2793 |
ArcelorMittal Brasil S.A. |
Member |
|
|
mt:ArcelorMittalBrasilS.A.Member |
| 2794 |
ArcelorMittal South Africa Ltd. (AMSA) |
Member |
|
|
mt:ArcelorMittalSouthAfricaLtd.Member |
| 2795 |
ArcelorMittal Commercial Long Deutschland GmbH |
Member |
|
|
mt:ArcelorMittalCommercialLongDeutschlandGmbHMember |
| 2796 |
Classes of other provisions [axis] |
Axis |
|
|
ifrs-full:ClassesOfProvisionsAxis |
| 2797 |
Other provisions [member] |
Member |
|
|
ifrs-full:OtherProvisionsMember |
| 2798 |
Competition and antitrust claims |
Member |
|
|
mt:CompetitionandAntitrustClaimsMember |
| 2799 |
Claims Related To Alleged Concerted Practice With Highveld |
Member |
|
|
mt:ClaimsRelatedToAllegedConcertedPracticeWithHighveldMember |
| 2800 |
Disclosure of other provisions [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfOtherProvisionsLineItems |
| 2801 |
Number of plaintiffs |
Concept (Integer) |
For Period |
|
mt:LossContingencyNumberofPlaintiffs |
| 2802 |
Damages sought |
Concept (Monetary) |
For Period |
Debit |
mt:LossContingencyDamagesSoughtValue1 |
| 2803 |
Number of steel producers under investigation |
Concept (Integer) |
For Period |
|
mt:NumberOfSteelProducersUnderInvestigation |
| 2804 |
Damages sought, percent of annual revenues |
Concept (Percent) |
For Period |
|
mt:LossContingencyDamagesSoughtPercentOfAnnualRevenues |
| 2805 |
Damages sought, period under review |
Concept (xbrli:durationItemType) |
For Period |
|
mt:LossContingencyDamagesSoughtPeriodUnderReview |
| 2806 |
Amount awarded to other party |
Concept (Monetary) |
For Period |
Credit |
mt:LitigationSettlementAmountAwardedtoOtherParty |
| 2807 |
Payments for settlements |
Concept (Monetary) |
For Period |
Credit |
mt:PaymentsforLegalSettlements |
| 2808 |
2442409 - Disclosure - PROVISIONS, CONTINGENCIES AND COMMITMENTS - Other Legal Claims (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ProvisionsContingenciesAndCommitmentsOtherLegalClaimsDetails |
| 2809 |
Disclosure of other provisions [table] |
Table |
* |
* |
ifrs-full:DisclosureOfOtherProvisionsTable |
| 2810 |
Legal Entity [Axis] |
Axis |
|
|
dei:LegalEntityAxis |
| 2811 |
Entity [Domain] |
Member |
|
|
dei:EntityDomain |
| 2812 |
Acindar Industria Argentina de Aceros S.A. |
Member |
|
|
mt:AcindarIndustriaArgentinadeAcerosS.A.Member |
| 2813 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 2814 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 2815 |
Canada |
Member |
|
|
country:CA |
| 2816 |
Italy |
Member |
|
|
country:IT |
| 2817 |
Luxembourg |
Member |
|
|
country:LU |
| 2818 |
France |
Member |
|
|
country:FR |
| 2819 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 2820 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 2821 |
Bottom of range |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 2822 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 2823 |
Classes of other provisions [axis] |
Axis |
|
|
ifrs-full:ClassesOfProvisionsAxis |
| 2824 |
Other provisions [member] |
Member |
|
|
ifrs-full:OtherProvisionsMember |
| 2825 |
Various other legal claims |
Member |
|
|
mt:VariousOtherLegalClaimsMember |
| 2826 |
Other legal claims |
Member |
|
|
mt:OtherLegalClaimsMember |
| 2827 |
Litigation Case [Axis] |
Axis |
|
|
mt:LitigationCase1Axis |
| 2828 |
Litigation Case [Domain] |
Member |
|
|
mt:LitigationCase1Domain |
| 2829 |
Wrongful Termination of Contract |
Member |
|
|
mt:WrongfulTerminationofContractMember |
| 2830 |
Wrongful Termination of Contract Case, Possible Outcome One |
Member |
|
|
mt:WrongfulTerminationofContractCasePossibleOutcomeOneMember |
| 2831 |
Wrongful Termination of Contract Case, Possible Outcome Two |
Member |
|
|
mt:WrongfulTerminationofContractCasePossibleOutcomeTwoMember |
| 2832 |
Significant Shareholder |
Member |
|
|
mt:SignificantShareholderMember |
| 2833 |
Association Actionnaires d'Arcelor |
Member |
|
|
mt:AssociationActionnairesdArcelorMember |
| 2834 |
Disclosure of other provisions [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfOtherProvisionsLineItems |
| 2835 |
Provisions |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherProvisions |
| 2836 |
Number of claims |
Concept (Integer) |
For Period |
|
mt:LossContingencyNewClaimsFiledNumber1 |
| 2837 |
Number of claims pending |
Concept (Integer) |
For Period |
|
mt:LossContingencyPendingClaimsNumber1 |
| 2838 |
Number of claims pending within the Administrative Branch of Customs Office Authority |
Concept (Integer) |
For Period |
|
mt:LossContingencyPendingClaimsWithinAdministrativeBranchOfCustomsOfficeAuthorityNumber |
| 2839 |
Number of pending claims appealed |
Concept (Integer) |
For Period |
|
mt:LossContingencyPendingClaimsAppealedNumber |
| 2840 |
Damages sought |
Concept (Monetary) |
For Period |
Debit |
mt:LossContingencyDamagesSoughtValue1 |
| 2841 |
Number of favorable tax assessments or claims |
Concept (Integer) |
For Period |
|
mt:LossContingencyClaimsSettledFavorablyNumber |
| 2842 |
Number of unfavorable tax assessments or claims |
Concept (Integer) |
For Period |
|
mt:LossContingencyClaimsSettledUnfavorablyNumber |
| 2843 |
Estimate of possible loss |
Concept (Monetary) |
As Of |
Debit |
mt:LossContingencyEstimateofPossibleLoss |
| 2844 |
Amount awarded from other party |
Concept (Monetary) |
For Period |
Debit |
mt:LitigationSettlementAmountAwardedfromOtherParty |
| 2845 |
Business combination, expected amount |
Concept (Monetary) |
As Of |
Credit |
mt:BusinessCombinationConsiderationTransferredExpectedAmount |
| 2846 |
Number of dismissed claims |
Concept (Integer) |
For Period |
|
mt:LossContingencyClaimsDismissedNumber1 |
| 2847 |
Damages sought of counterclaim value |
Concept (Monetary) |
For Period |
Debit |
mt:LossContingencyDamagesSoughtCounterclaimValue |
| 2848 |
Litigation case, term of contract |
Concept (xbrli:durationItemType) |
For Period |
|
mt:LossContingencyLitigationCaseTermOfContract |
| 2849 |
Losses on litigation settlements |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:LossesOnLitigationSettlements |
| 2850 |
Professional fees expense |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProfessionalFeesExpense |
| 2851 |
Payments for settlements |
Concept (Monetary) |
For Period |
Credit |
mt:PaymentsforLegalSettlements |
| 2852 |
Tender offer, exchange ratio |
Concept (Pure) |
For Period |
|
mt:StockholdersEquityTenderOfferExchangeRatio |
| 2853 |
2442410 - Disclosure - PROVISIONS, CONTINGENCIES AND COMMITMENTS - Commitments (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ProvisionsContingenciesAndCommitmentsCommitmentsDetails |
| 2854 |
Implied Table |
Table |
* |
* |
implied:Table |
| 2855 |
Disclosure of Other Provisions, Contingent Liabilities and Commitments [Abstract] |
Abstract |
|
|
mt:DisclosureofOtherProvisionsContingentLiabilitiesandCommitmentsAbstract |
| 2856 |
Purchase commitments |
Concept (Monetary) |
As Of |
Credit |
mt:PurchaseCommitments1 |
| 2857 |
Guarantees, pledges and other collateral |
Concept (Monetary) |
As Of |
Credit |
mt:GuaranteesPledgesandOtherCollateral |
| 2858 |
Non-cancellable operating leases |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease |
| 2859 |
Capital expenditure commitments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CapitalCommitments |
| 2860 |
Other commitments |
Concept (Monetary) |
As Of |
Credit |
mt:OtherCommitments1 |
| 2861 |
Total |
Concept (Monetary) |
As Of |
Credit |
mt:ContractualObligation1 |
| 2862 |
2442411 - Disclosure - PROVISIONS, CONTINGENCIES AND COMMITMENTS - Commitments - Narrative (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ProvisionsContingenciesAndCommitmentsCommitmentsNarrativeDetails |
| 2863 |
Disclosure of transactions between related parties [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable |
| 2864 |
Assets and liabilities classified as held for sale [axis] |
Axis |
|
|
ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis |
| 2865 |
Assets and liabilities classified as held for sale [member] |
Member |
|
|
ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleMember |
| 2866 |
Disposal groups classified as held for sale |
Member |
|
|
ifrs-full:DisposalGroupsClassifiedAsHeldForSaleMember |
| 2867 |
Disposal Group Name [Axis] |
Axis |
|
|
mt:DisposalGroupNameAxis |
| 2868 |
Disposal Group Name [Domain] |
Member |
|
|
mt:DisposalGroupNameDomain |
| 2869 |
Ilva remedies |
Member |
|
|
mt:IlvaRemediesMember |
| 2870 |
Joint ventures [axis] |
Axis |
|
|
ifrs-full:JointVenturesAxis |
| 2871 |
Entity's total for joint ventures [member] |
Member |
|
|
ifrs-full:EntitysTotalForJointVenturesMember |
| 2872 |
Tameh |
Member |
|
|
mt:TamehMember |
| 2873 |
Enerfos |
Member |
|
|
mt:EnerfosMember |
| 2874 |
Calvert |
Member |
|
|
mt:CalvertMember |
| 2875 |
Al Jubail |
Member |
|
|
mt:ArcelorMittalTubularProductsJubailMember |
| 2876 |
Categories of related parties [axis] |
Axis |
|
|
ifrs-full:CategoriesOfRelatedPartiesAxis |
| 2877 |
Entity's total for related parties [member] |
Member |
|
|
ifrs-full:EntitysTotalForRelatedPartiesMember |
| 2878 |
Associates |
Member |
|
|
ifrs-full:AssociatesMember |
| 2879 |
Joint ventures |
Member |
|
|
ifrs-full:JointVenturesMember |
| 2880 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 2881 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 2882 |
South Africa |
Member |
|
|
country:ZA |
| 2883 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 2884 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 2885 |
Asset-Based Revolving Credit Facility |
Member |
|
|
mt:AssetBasedRevolvingCreditFacilityMember |
| 2886 |
Subsidiaries [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInSubsidiariesAxis |
| 2887 |
Entity's total for subsidiaries [member] |
Member |
|
|
ifrs-full:EntitysTotalForSubsidiariesMember |
| 2888 |
Operating Subsidiaries |
Member |
|
|
mt:OperatingSubsidiariesMember |
| 2889 |
Disclosure of transactions between related parties [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems |
| 2890 |
Commitments in relation to associates |
Concept (Monetary) |
As Of |
Credit |
mt:CommitmentsInRelationToAssociates |
| 2891 |
Commitments in relation to joint ventures |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CommitmentsInRelationToJointVentures |
| 2892 |
Guarantees, pledges and other collateral, related to performance guarantee |
Concept (Monetary) |
As Of |
Credit |
mt:GuaranteesPledgesandOtherCollateralRelatedToPerformanceGuarantee |
| 2893 |
Purchase commitments |
Concept (Monetary) |
As Of |
Credit |
mt:PurchaseCommitments1 |
| 2894 |
Provision of guarantees or collateral to entity, third party transactions |
Concept (Monetary) |
For Period |
Credit |
mt:ProvisionOfGuaranteesOrCollateralToEntity |
| 2895 |
Provision of guarantees or collateral by entity, related party transactions |
Concept (Monetary) |
For Period |
|
ifrs-full:ProvisionOfGuaranteesOrCollateralByEntityRelatedPartyTransactions |
| 2896 |
Inventory pledged in asset-based revolving credit facility |
Concept (Monetary) |
As Of |
Debit |
mt:DebtInstrumentCollateralAmount1 |
| 2897 |
Debt instrument, ceded bank accounts to secure environmental obligations, true sale of receivables programs and the revolving base finance facility |
Concept (Monetary) |
As Of |
Debit |
mt:DebtinstrumentCededBankAccountsToSecureEnvironmentalObligationsTrueSaleOfReceivablesProgramsAndRevolvingBaseFinanceFacility |
| 2898 |
Property, plant and equipment, pledged as security |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PropertyPlantAndEquipmentPledgedAsSecurity |
| 2899 |
Performance guarantees within sureties, guarantees, LOC, pledges, and other collateral |
Concept (Monetary) |
As Of |
Credit |
mt:PerformanceGuaranteesWithinSuretiesGuaranteesLOCPledgesAndOtherCollateral |
| 2900 |
Commitments in relation to associates within sureties, guarantees, LOC, pledges, and other collateral |
Concept (Monetary) |
As Of |
Credit |
mt:CommitmentsInRelationToAssociatesWithinSuretiesGuaranteesLOCPledgesAndOtherCollateral |
| 2901 |
Guarantees, pledges and other collateral |
Concept (Monetary) |
As Of |
Credit |
mt:GuaranteesPledgesandOtherCollateral |
| 2902 |
2442412 - Disclosure - PROVISIONS, CONTINGENCIES AND COMMITMENTS - Future Minimum Lease Payments Maturities (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ProvisionsContingenciesAndCommitmentsFutureMinimumLeasePaymentsMaturitiesDetails |
| 2903 |
Disclosure of maturity analysis of operating lease payments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsTable |
| 2904 |
Maturity [axis] |
Axis |
|
|
ifrs-full:MaturityAxis |
| 2905 |
Aggregated time bands [member] |
Member |
|
|
ifrs-full:AggregatedTimeBandsMember |
| 2906 |
Less than 1 year |
Member |
|
|
ifrs-full:NotLaterThanOneYearMember |
| 2907 |
1-3 years |
Member |
|
|
ifrs-full:LaterThanOneYearAndNotLaterThanThreeYearsMember |
| 2908 |
4-5 years |
Member |
|
|
ifrs-full:LaterThanThreeYearsAndNotLaterThanFiveYearsMember |
| 2909 |
More than 5 years |
Member |
|
|
ifrs-full:LaterThanFiveYearsMember |
| 2910 |
Disclosure of maturity analysis of operating lease payments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems |
| 2911 |
Non-cancellable operating lease commitments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease |
| 2912 |
2442413 - Disclosure - PROVISIONS, CONTINGENCIES AND COMMITMENTS - Operating Lease and Other - Narrative (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/ProvisionsContingenciesAndCommitmentsOperatingLeaseAndOtherNarrativeDetails |
| 2913 |
Disclosure of finance lease and operating lease by lessee [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable |
| 2914 |
Business combinations [axis] |
Axis |
|
|
ifrs-full:BusinessCombinationsAxis |
| 2915 |
Entity's total for business combinations [member] |
Member |
|
|
ifrs-full:EntitysTotalForBusinessCombinationsMember |
| 2916 |
Ilva |
Member |
|
|
mt:IlvaS.p.A.Member |
| 2917 |
Disposal Group Name [Axis] |
Axis |
|
|
mt:DisposalGroupNameAxis |
| 2918 |
Disposal Group Name [Domain] |
Member |
|
|
mt:DisposalGroupNameDomain |
| 2919 |
Ilva remedies |
Member |
|
|
mt:IlvaRemediesMember |
| 2920 |
Assets and liabilities classified as held for sale [axis] |
Axis |
|
|
ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis |
| 2921 |
Assets and liabilities classified as held for sale [member] |
Member |
|
|
ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleMember |
| 2922 |
Disposal groups classified as held for sale |
Member |
|
|
ifrs-full:DisposalGroupsClassifiedAsHeldForSaleMember |
| 2923 |
Classes of property, plant and equipment [axis] |
Axis |
|
|
ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis |
| 2924 |
Property, plant and equipment [member] |
Member |
|
|
ifrs-full:PropertyPlantAndEquipmentMember |
| 2925 |
Property, plant and equipment |
Member |
|
|
ifrs-full:PropertyPlantAndEquipmentUnderOperatingLeasesMember |
| 2926 |
Buildings |
Member |
|
|
ifrs-full:BuildingsMember |
| 2927 |
Land |
Member |
|
|
ifrs-full:LandMember |
| 2928 |
Other property, plant and equipment |
Member |
|
|
ifrs-full:OtherPropertyPlantAndEquipmentMember |
| 2929 |
Legal Entity [Axis] |
Axis |
|
|
dei:LegalEntityAxis |
| 2930 |
Entity [Domain] |
Member |
|
|
dei:EntityDomain |
| 2931 |
ArcelorMittal Atlantique et Lorraine S.A.S. |
Member |
|
|
mt:ArcelorMittalAtlantiqueetLorraineS.A.S.Member |
| 2932 |
ArcelorMittal Belgium N.V. |
Member |
|
|
mt:ArcelorMittalBelgiumN.V.Member |
| 2933 |
ArcelorMittal South Africa Ltd. (AMSA) |
Member |
|
|
mt:ArcelorMittalSouthAfricaLtd.Member |
| 2934 |
ArcelorMittal Mexico S.A. de C.V. |
Member |
|
|
mt:ArcelorMittalMexicoS.A.deC.V.Member |
| 2935 |
ArcelorMittal Brasil S.A. |
Member |
|
|
mt:ArcelorMittalBrasilS.A.Member |
| 2936 |
Disclosure of finance lease and operating lease by lessee [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems |
| 2937 |
Minimum operating lease payments recognised as expense |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:MinimumOperatingLeasePayments |
| 2938 |
Contingent rents recognised as expense, classified as operating lease |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ContingentRentsRecognisedAsExpenseClassifiedAsOperatingLease |
| 2939 |
Non-cancellable operating leases |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease |
| 2940 |
Purchase commitments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ContractualCapitalCommitments |
| 2941 |
Total amount of investment program |
Concept (Monetary) |
As Of |
Credit |
mt:ContractualCapitalCommitmentsInvestmentProgramAmount |
| 2942 |
Investment program, term |
Concept (xbrli:durationItemType) |
For Period |
|
mt:ContractualCapitalCommitmentsInvestmentProgramTerm |
| 2943 |
Construction capacity (in tonnes) |
Concept (num:massItemType) |
As Of |
|
mt:ContractualCapitalCommitmentsInvestmentProgramConstructionCapacity |
| 2944 |
Fine for non-compliance with agreement, maximum |
Concept (Monetary) |
For Period |
Debit |
mt:OtherCommitmentsFineForNonComplianceWithAgreementMaximum |
| 2945 |
Capital commitments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CapitalCommitments |
| 2946 |
Environmental capital expenditure commitments |
Concept (Monetary) |
As Of |
Credit |
mt:EnvironmentalCapitalExpenditureCommitments |
| 2947 |
Other commitments |
Concept (Monetary) |
As Of |
Credit |
mt:OtherCommitments1 |
| 2948 |
Contractual commitments to sell |
Concept (Monetary) |
As Of |
Credit |
mt:SupplyCommitmentRemainingMinimumAmountCommitted |
| 2949 |
2446402 - Disclosure - INCOME TAXES - Components of Income Tax Expense (Benefit) (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/IncomeTaxesComponentsOfIncomeTaxExpenseBenefitDetails |
| 2950 |
Implied Table |
Table |
* |
* |
implied:Table |
| 2951 |
Income Taxes [Abstract] |
Abstract |
|
|
mt:IncomeTaxesAbstract |
| 2952 |
Total current tax expense (benefit) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriods |
| 2953 |
Total deferred tax expense (benefit) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:DeferredTaxExpenseIncome |
| 2954 |
Total income tax expense (benefit) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncomeTaxExpenseContinuingOperations |
| 2955 |
2446403 - Disclosure - INCOME TAXES - Effective Income Tax Rate Reconciliation (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/IncomeTaxesEffectiveIncomeTaxRateReconciliationDetails |
| 2956 |
Implied Table |
Table |
* |
* |
implied:Table |
| 2957 |
Income Taxes [Abstract] |
Abstract |
|
|
mt:IncomeTaxesAbstract |
| 2958 |
Net income (including non-controlling interests) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLoss |
| 2959 |
Income tax expense (benefit) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncomeTaxExpenseContinuingOperations |
| 2960 |
Income (loss) before tax |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossBeforeTax |
| 2961 |
Tax expense (benefit) at the statutory rates applicable to profits (losses) in the countries |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:TaxExpenseIncomeAtApplicableTaxRate |
| 2962 |
Permanent items |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfPermanentDifferences |
| 2963 |
Rate changes |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:TaxEffectFromChangeInTaxRate |
| 2964 |
Net change in measurement of deferred tax assets |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfDeferredAssetsMeasurementAdjustment |
| 2965 |
Tax effects of foreign currency translation |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:TaxEffectOfForeignTaxRates |
| 2966 |
Tax credits |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfTaxCredit |
| 2967 |
Other taxes |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectfromOthersTaxes |
| 2968 |
Others |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome |
| 2969 |
Total income tax expense (benefit) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncomeTaxExpenseContinuingOperations |
| 2970 |
2446404 - Disclosure - INCOME TAXES - Additional Details (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/IncomeTaxesAdditionalDetailsDetails |
| 2971 |
Disclosure of temporary difference, unused tax losses and unused tax credits [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable |
| 2972 |
Business combinations [axis] |
Axis |
|
|
ifrs-full:BusinessCombinationsAxis |
| 2973 |
Entity's total for business combinations [member] |
Member |
|
|
ifrs-full:EntitysTotalForBusinessCombinationsMember |
| 2974 |
Ilva |
Member |
|
|
mt:IlvaS.p.A.Member |
| 2975 |
Temporary difference, unused tax losses and unused tax credits [axis] |
Axis |
|
|
ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis |
| 2976 |
Temporary difference, unused tax losses and unused tax credits [member] |
Member |
|
|
ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember |
| 2977 |
Temporary differences related to investments in subsidiaries, associates and joint ventures |
Member |
|
|
mt:TemporaryDifferencesRelatedToInvestmentsInSubsidiariesAssociatesAndJointVenturesMember |
| 2978 |
Other temporary differences |
Member |
|
|
ifrs-full:OtherTemporaryDifferencesMember |
| 2979 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 2980 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 2981 |
Luxembourg |
Member |
|
|
country:LU |
| 2982 |
Europe |
Member |
|
|
srt:EuropeMember |
| 2983 |
Belgium |
Member |
|
|
country:BE |
| 2984 |
France |
Member |
|
|
country:FR |
| 2985 |
Europe and North Americas |
Member |
|
|
mt:EuropeandNorthAmericaMember |
| 2986 |
Luxembourg and Mexicos |
Member |
|
|
mt:LuxembourgandMexicoMember |
| 2987 |
Basque Country in Spain, Liberia, Luxembourg, Switzerland and the United States |
Member |
|
|
mt:BasqueCountryinSpainLiberiaLuxembourgSwitzerlandandtheUnitedStatesMember |
| 2988 |
Brazil, France, Germany, Luxembourg and Spain |
Member |
|
|
mt:BrazilFranceGermanyLuxembourgandSpainMember |
| 2989 |
Basque Country in Spain |
Member |
|
|
mt:BasqueCountryInSpainMember |
| 2990 |
Brazil, Spain, and the United States |
Member |
|
|
mt:BrazilSpainAndTheUnitedStatesMember |
| 2991 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 2992 |
Segments [member] |
Member |
|
|
ifrs-full:SegmentsMember |
| 2993 |
Mining |
Member |
|
|
mt:MiningMember |
| 2994 |
Tax Period [Axis] |
Axis |
|
|
mt:TaxPeriod1Axis |
| 2995 |
Tax Period [Domain] |
Member |
|
|
mt:TaxPeriod1Domain |
| 2996 |
Unlimited Tax Period |
Member |
|
|
mt:UnlimitedTaxPeriodMember |
| 2997 |
Associates [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInAssociatesAxis |
| 2998 |
Entity's total for associates [member] |
Member |
|
|
ifrs-full:EntitysTotalForAssociatesMember |
| 2999 |
Gestamp |
Member |
|
|
mt:GestampAutomocinMember |
| 3000 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems |
| 3001 |
Applicable tax rate |
Concept (Percent) |
For Period |
|
ifrs-full:ApplicableTaxRate |
| 3002 |
Bargain purchase gain |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainRecognisedInBargainPurchaseTransaction |
| 3003 |
Tax effect from change in tax rate |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:TaxEffectFromChangeInTaxRate |
| 3004 |
Net change in measurement of deferred tax assets |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfDeferredAssetsMeasurementAdjustment |
| 3005 |
Unrecognized part of deferred tax assets on write-downs of value of shares and receivables |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfUnrecognizedDeferredTaxAssetsOnWriteDownsOfValueofSharesandReceivables |
| 3006 |
Tax expense related to non-recognition and derecognition of other deferred tax assets |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfNonRecognitionandDerecognitionofOtherDeferredTaxAssets |
| 3007 |
Tax expense (benefit) related to recognition of deferred tax assets for losses and other deductible temporary differences of previous years |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfRecognitionOfDeferredTaxAssetsforLossesandOtherDeductibleTemporaryDifferencesRelatedToPriorPeriods |
| 3008 |
Increase in deferred tax assets due to tax integration |
Concept (Monetary) |
For Period |
Credit |
mt:IncreaseDecreaseThroughTaxIntegrationDeferredTaxLiabilityAsset |
| 3009 |
Future taxable income increase due to tax integration |
Concept (Monetary) |
For Period |
Credit |
mt:IncreaseDecreaseInProjectedFutureTaxableIncomeLossDueToTaxIntegration |
| 3010 |
Deferred tax asset recoverability, currency adjustment |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset |
| 3011 |
Derecognition of previously recognized deferred tax assets |
Concept (Monetary) |
For Period |
Credit |
mt:IncreaseDecreaseThroughDerecognitionOfPreviouslyRecognizedTaxAssetsDeferredTaxLiabilityAsset |
| 3012 |
Proceeds from issue of ordinary shares |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromIssueOfOrdinaryShares |
| 3013 |
Proportion of ownership interest in associate |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestInAssociate |
| 3014 |
Proceeds from sales of interests in associates |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromSalesOfInterestsInAssociates |
| 3015 |
Tax effect of foreign tax rates |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:TaxEffectOfForeignTaxRates |
| 3016 |
Other tax effects for reconciliation between accounting profit and tax expense (income) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome |
| 3017 |
Tax contingencies/settlements |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfTaxContingencyAndTaxSettlement |
| 3018 |
Prior period taxes |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfPriorPeriodTaxes |
| 3019 |
Accumulated income tax losses |
Concept (Monetary) |
As Of |
Debit |
mt:AccumulatedIncomeTaxLosses |
| 3020 |
Accumulated income tax losses, realizable |
Concept (Monetary) |
As Of |
Debit |
mt:AccumulatedIncomeTaxLossesRealizable |
| 3021 |
Deferred tax assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:DeferredTaxAssets |
| 3022 |
Accumulated income tax losses subject to recapture |
Concept (Monetary) |
As Of |
Debit |
mt:AccumulatedIncomeTaxLossesSubjectToRecapture |
| 3023 |
Future taxable income required |
Concept (Monetary) |
For Period |
Credit |
mt:DeferredTaxAssetsFutureTaxableIncomeRequired |
| 3024 |
Deferred tax liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DeferredTaxLiabilities |
| 3025 |
Unrecognized deferred tax liabilities |
Concept (Monetary) |
As Of |
|
ifrs-full:TemporaryDifferencesAssociatedWithInvestmentsInSubsidiariesBranchesAndAssociatesAndInterestsInJointVentures |
| 3026 |
Operating loss carryforward, amount |
Concept (Monetary) |
As Of |
Debit |
mt:OperatingLossCarryforwards1 |
| 3027 |
Tax losses for which deferred tax asset recognised |
Concept (Monetary) |
As Of |
Debit |
mt:TaxLossesForWhichDeferredTaxAssetRecognised |
| 3028 |
Unused tax losses for which no deferred tax asset recognised |
Concept (Monetary) |
As Of |
|
ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised |
| 3029 |
Tax credit, amount |
Concept (Monetary) |
As Of |
Debit |
mt:TaxCreditCarryforwardAmount1 |
| 3030 |
Tax credits for which deferred tax asset recognised |
Concept (Monetary) |
As Of |
Debit |
mt:TaxCreditsForWhichDeferredTaxAssetRecognised |
| 3031 |
Unused tax credits for which no deferred tax asset recognised |
Concept (Monetary) |
As Of |
|
ifrs-full:UnusedTaxCreditsForWhichNoDeferredTaxAssetRecognised |
| 3032 |
2446405 - Disclosure - INCOME TAXES - Permanent Items (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/IncomeTaxesPermanentItemsDetails |
| 3033 |
Implied Table |
Table |
* |
* |
implied:Table |
| 3034 |
Income Taxes [Abstract] |
Abstract |
|
|
mt:IncomeTaxesAbstract |
| 3035 |
Tax deductible write-downs on shares and receivables |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfUnrecognizedDeferredTaxAssetsOnWriteDownsOfValueofSharesandReceivables |
| 3036 |
Juros sobre o Capital Próprio (“JSCP”) |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfDividendTaxDeduction |
| 3037 |
Non taxable gain on bargain purchase |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfGainRecognisedOnBargainPurchase |
| 3038 |
Taxable income (tax loss) of AMTFS |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:TaxEffectOfTaxLosses |
| 3039 |
Taxable dividends |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfTaxableDividends |
| 3040 |
Other permanent items |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfOtherPermanentDifferences |
| 3041 |
Total permanent items |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfPermanentDifferences |
| 3042 |
2446406 - Disclosure - INCOME TAXES - Others (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/IncomeTaxesOthersDetails |
| 3043 |
Implied Table |
Table |
* |
* |
implied:Table |
| 3044 |
Income Taxes [Abstract] |
Abstract |
|
|
mt:IncomeTaxesAbstract |
| 3045 |
Tax contingencies/settlements |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfTaxContingencyAndTaxSettlement |
| 3046 |
Prior period taxes |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfPriorPeriodTaxes |
| 3047 |
Others |
Concept (Monetary) |
For Period |
Debit |
mt:TaxEffectOfOtherMiscellaneous |
| 3048 |
Total |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome |
| 3049 |
2446407 - Disclosure - INCOME TAXES - Income Tax Recognized in Equity (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/IncomeTaxesIncomeTaxRecognizedInEquityDetails |
| 3050 |
Disclosure of temporary difference, unused tax losses and unused tax credits [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable |
| 3051 |
Components of equity [axis] |
Axis |
|
|
ifrs-full:ComponentsOfEquityAxis |
| 3052 |
Total Equity |
Member |
|
|
ifrs-full:EquityMember |
| 3053 |
Unrealized gain (loss) on derivative financial instruments |
Member |
|
|
ifrs-full:ReserveOfGainsAndLossesOnHedgingInstrumentsThatHedgeInvestmentsInEquityInstrumentsMember |
| 3054 |
Recognized actuarial gain (loss) |
Member |
|
|
ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlansMember |
| 3055 |
Foreign currency translation adjustments |
Member |
|
|
ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember |
| 3056 |
Other reserves |
Member |
|
|
ifrs-full:OtherReservesMember |
| 3057 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems |
| 3058 |
Deferred tax expense (benefit) recognized in other comprehensive income |
Concept (Monetary) |
For Period |
|
ifrs-full:IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome |
| 3059 |
Deferred tax expense (benefit) recognized directly in equity |
Concept (Monetary) |
For Period |
|
ifrs-full:DeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity |
| 3060 |
Income tax relating to components of other comprehensive income |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CurrentAndDeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity |
| 3061 |
2446408 - Disclosure - INCOME TAXES - Origin of the Deferred Tax Assets and Liabilities (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/IncomeTaxesOriginOfDeferredTaxAssetsAndLiabilitiesDetails |
| 3062 |
Disclosure of temporary difference, unused tax losses and unused tax credits [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable |
| 3063 |
After Offset Amount, Offset Amount And Before Offset Amount [Axis] |
Axis |
|
|
mt:AfterOffsetAmountOffsetAmountAndBeforeOffsetAmountAxis |
| 3064 |
After Offset Amount, Offset Amount And Before Offset Amount [Domain] |
Member |
|
|
mt:AfterOffsetAmountOffsetAmountAndBeforeOffsetAmountDomain |
| 3065 |
Before Offset Amount |
Member |
|
|
mt:BeforeOffsetAmountMember |
| 3066 |
Temporary difference, unused tax losses and unused tax credits [axis] |
Axis |
|
|
ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis |
| 3067 |
Temporary difference, unused tax losses and unused tax credits [member] |
Member |
|
|
ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember |
| 3068 |
Intangible assets |
Member |
|
|
mt:IntangibleAssetsRelatedTemporaryDifferencesMember |
| 3069 |
Property, plant and equipment |
Member |
|
|
mt:PropertyPlantandEquipmentRelatedTemporaryDifferencesMember |
| 3070 |
Inventories |
Member |
|
|
mt:InventoriesRelatedTemporaryDifferencesMember |
| 3071 |
Financial instruments |
Member |
|
|
mt:FinancialInstrumentsRelatedTemporaryDifferencesMember |
| 3072 |
Other assets |
Member |
|
|
mt:OtherAssetsRelatedTemporaryDifferencesMember |
| 3073 |
Provisions |
Member |
|
|
mt:ProvisionsRelatedTemporaryDifferencesMember |
| 3074 |
Other liabilities |
Member |
|
|
mt:OtherLiabilityRelatedTemporaryDifferencesMember |
| 3075 |
Tax losses and other tax benefits carried forward |
Member |
|
|
ifrs-full:UnusedTaxLossesMember |
| 3076 |
Tax credits carried forward |
Member |
|
|
ifrs-full:UnusedTaxCreditsMember |
| 3077 |
Untaxed reserves |
Member |
|
|
mt:UntaxedReservesRelatedTemporaryDifferencesMember |
| 3078 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems |
| 3079 |
Deferred tax assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:DeferredTaxAssets |
| 3080 |
Deferred tax liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DeferredTaxLiabilities |
| 3081 |
Deferred tax assets / (liabilities) |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DeferredTaxLiabilityAsset |
| 3082 |
2446409 - Disclosure - INCOME TAXES - Deferred Tax Assets (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/IncomeTaxesDeferredTaxAssetsDetails |
| 3083 |
Disclosure of temporary difference, unused tax losses and unused tax credits [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable |
| 3084 |
After Offset Amount, Offset Amount And Before Offset Amount [Axis] |
Axis |
|
|
mt:AfterOffsetAmountOffsetAmountAndBeforeOffsetAmountAxis |
| 3085 |
After Offset Amount, Offset Amount And Before Offset Amount [Domain] |
Member |
|
|
mt:AfterOffsetAmountOffsetAmountAndBeforeOffsetAmountDomain |
| 3086 |
Before Offset Amount |
Member |
|
|
mt:BeforeOffsetAmountMember |
| 3087 |
Temporary difference, unused tax losses and unused tax credits [axis] |
Axis |
|
|
ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis |
| 3088 |
Temporary difference, unused tax losses and unused tax credits [member] |
Member |
|
|
ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember |
| 3089 |
Tax losses and other tax benefits carried forward |
Member |
|
|
ifrs-full:UnusedTaxLossesMember |
| 3090 |
Tax credits carried forward |
Member |
|
|
ifrs-full:UnusedTaxCreditsMember |
| 3091 |
Other temporary differences |
Member |
|
|
ifrs-full:OtherTemporaryDifferencesMember |
| 3092 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems |
| 3093 |
Gross amount |
Concept (Monetary) |
As Of |
Debit |
mt:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAmount |
| 3094 |
Total deferred tax assets |
Concept (Monetary) |
As Of |
Debit |
mt:DeferredTaxAssetsIncludingUnrecognizedAmounts |
| 3095 |
Recognized deferred tax assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:DeferredTaxAssets |
| 3096 |
Unrecognized deferred tax assets |
Concept (Monetary) |
As Of |
|
ifrs-full:DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised |
| 3097 |
2446410 - Disclosure - INCOME TAXES - Operating Losses (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/IncomeTaxesOperatingLossesDetails |
| 3098 |
Disclosure of temporary difference, unused tax losses and unused tax credits [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable |
| 3099 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 3100 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 3101 |
Basque Country in Spain, Liberia, Luxembourg, Switzerland and the United States |
Member |
|
|
mt:BasqueCountryinSpainLiberiaLuxembourgSwitzerlandandtheUnitedStatesMember |
| 3102 |
Tax Period [Axis] |
Axis |
|
|
mt:TaxPeriod1Axis |
| 3103 |
Tax Period [Domain] |
Member |
|
|
mt:TaxPeriod1Domain |
| 3104 |
Tax Year 2019 |
Member |
|
|
mt:TaxYear2019Member |
| 3105 |
Tax Year 2020 |
Member |
|
|
mt:TaxYear2020Member |
| 3106 |
Tax Year 2021 |
Member |
|
|
mt:TaxYear2021Member |
| 3107 |
Tax Year 2022 |
Member |
|
|
mt:TaxYear2022Member |
| 3108 |
Tax Year 2023 |
Member |
|
|
mt:TaxYear2023Member |
| 3109 |
Tax Year 2024 Through 2038 |
Member |
|
|
mt:TaxYear2024Through2038Member |
| 3110 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems |
| 3111 |
Recognized |
Concept (Monetary) |
As Of |
Debit |
mt:TaxLossesForWhichDeferredTaxAssetRecognised |
| 3112 |
Unrecognized |
Concept (Monetary) |
As Of |
|
ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised |
| 3113 |
Total |
Concept (Monetary) |
As Of |
Debit |
mt:OperatingLossCarryforwards1 |
| 3114 |
2446411 - Disclosure - INCOME TAXES - Tax Credits and Other Tax Benefits (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/IncomeTaxesTaxCreditsAndOtherTaxBenefitsDetails |
| 3115 |
Disclosure of temporary difference, unused tax losses and unused tax credits [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable |
| 3116 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 3117 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 3118 |
Basque Country in Spain |
Member |
|
|
mt:BasqueCountryInSpainMember |
| 3119 |
Tax Period [Axis] |
Axis |
|
|
mt:TaxPeriod1Axis |
| 3120 |
Tax Period [Domain] |
Member |
|
|
mt:TaxPeriod1Domain |
| 3121 |
Tax Year 2019 |
Member |
|
|
mt:TaxYear2019Member |
| 3122 |
Tax Year 2020 |
Member |
|
|
mt:TaxYear2020Member |
| 3123 |
Tax Year 2021 |
Member |
|
|
mt:TaxYear2021Member |
| 3124 |
Tax Year 2022 |
Member |
|
|
mt:TaxYear2022Member |
| 3125 |
Tax Year 2023 |
Member |
|
|
mt:TaxYear2023Member |
| 3126 |
Tax Year 2024 Through 2038 |
Member |
|
|
mt:TaxYear2024Through2038Member |
| 3127 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems |
| 3128 |
Recognized |
Concept (Monetary) |
As Of |
Debit |
mt:TaxCreditsForWhichDeferredTaxAssetRecognised |
| 3129 |
Unrecognized |
Concept (Monetary) |
As Of |
|
ifrs-full:UnusedTaxCreditsForWhichNoDeferredTaxAssetRecognised |
| 3130 |
Total |
Concept (Monetary) |
As Of |
Debit |
mt:TaxCreditCarryforwardAmount1 |
| 3131 |
2447402 - Disclosure - EQUITY - Share Details - Additional Information (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/EquityShareDetailsAdditionalInformationDetails |
| 3132 |
Disclosure of classes of share capital [table] |
Table |
* |
* |
ifrs-full:DisclosureOfClassesOfShareCapitalTable |
| 3133 |
Scenario [Axis] |
Axis |
|
|
mt:Scenario1Axis |
| 3134 |
Scenario [Domain] |
Member |
|
|
mt:ScenarioDomain |
| 3135 |
Pro Forma |
Member |
|
|
mt:ProForma1Member |
| 3136 |
Components of equity [axis] |
Axis |
|
|
ifrs-full:ComponentsOfEquityAxis |
| 3137 |
Total Equity |
Member |
|
|
ifrs-full:EquityMember |
| 3138 |
Share capital |
Member |
|
|
ifrs-full:IssuedCapitalMember |
| 3139 |
Disclosure of classes of share capital [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfClassesOfShareCapitalLineItems |
| 3140 |
Reverse stock split ratio |
Concept (Pure) |
For Period |
|
mt:StockholdersEquityNoteStockSplitConversionRatio1 |
| 3141 |
Shares issued (in shares) |
Concept (Shares) |
As Of |
|
ifrs-full:NumberOfSharesIssued |
| 3142 |
Conversion of the mandatorily convertible notes (in shares) |
Concept (Shares) |
For Period |
|
mt:IncreaseDecreaseThroughConversionOfConvertibleInstrumentsShares |
| 3143 |
Conversion of mandatorily convertible notes |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughConversionOfConvertibleInstruments |
| 3144 |
Equity |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Equity |
| 3145 |
Number of shares issued and fully paid (in shares) |
Concept (Shares) |
As Of |
|
ifrs-full:NumberOfSharesIssuedAndFullyPaid |
| 3146 |
Reduction of issued capital |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ReductionOfIssuedCapital |
| 3147 |
Par value (usd per share) |
Concept (Share) |
As Of |
|
ifrs-full:ParValuePerShare |
| 3148 |
Proceeds from issue of ordinary shares |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromIssueOfOrdinaryShares |
| 3149 |
Payments for share issue costs |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PaymentsForShareIssueCosts |
| 3150 |
Number of equity rights (in shares) |
Concept (Shares) |
For Period |
|
mt:RightsIssuedDuringPeriodShares |
| 3151 |
Class of warrant or right, exercise price of warrants or rights (eur per share) |
Concept (Share) |
As Of |
|
mt:ClassofWarrantorRightExercisePriceofWarrantsorRights |
| 3152 |
Class of warrant or right, number of securities called by each warrant or right |
Concept (Share) |
As Of |
|
mt:ClassofWarrantorRightNumberofSecuritiesCalledbyEachWarrantorRight |
| 3153 |
Stock issued during period |
Concept (Monetary) |
For Period |
Credit |
mt:StockIssuedDuringPeriodValueNewIssues1 |
| 3154 |
New shares issued (in shares) |
Concept (Shares) |
For Period |
|
mt:StockIssuedDuringPeriodSharesNewIssues1 |
| 3155 |
Increase (decrease) in authorised share capital |
Concept (Monetary) |
For Period |
Credit |
mt:IncreaseDecreaseInAuthorisedShareCapital |
| 3156 |
Increase (decrease) in number of shares authorised (in shares) |
Concept (Shares) |
For Period |
|
mt:IncreaseDecreaseInNumberOfSharesAuthorised |
| 3157 |
Increase (decrease) in authorised share capital (as a percentage) |
Concept (Percent) |
For Period |
|
mt:IncreaseDecreaseInAuthorisedShareCapitalPercentage |
| 3158 |
Authorised share capital |
Concept (Monetary) |
As Of |
Credit |
mt:AuthorisedShareCapital |
| 3159 |
Approval period (in years) |
Concept (xbrli:durationItemType) |
For Period |
|
mt:IncreaseDecreaseInAuthorisedShareCapitalApprovalPeriod |
| 3160 |
Shares authorized (in shares) |
Concept (Shares) |
As Of |
|
ifrs-full:NumberOfSharesAuthorised |
| 3161 |
Common shares (no par value, 1,151,576,921 and 1,151,576,921 shares authorized, 1,021,903,623 and 1,021,903,623 shares issued, and 1,013,568,258 and 1,019,916,787 shares outstanding at December 31, 2018 and 2017, respectively) |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:IssuedCapital |
| 3162 |
Share buyback (in shares) |
Concept (Shares) |
For Period |
|
mt:StockRepurchasedDuringPeriodShares1 |
| 3163 |
Share buyback |
Concept (Monetary) |
For Period |
Credit |
mt:PaymentsForRepurchaseOfEquity1 |
| 3164 |
Treasury stock acquired, average price per share |
Concept (Share) |
For Period |
|
mt:TreasuryStockAcquiredAverageCostPerShare1 |
| 3165 |
Treasury shares (in shares) |
Concept (Shares) |
As Of |
|
mt:NumberOfTreasuryShares |
| 3166 |
2447403 - Disclosure - EQUITY - Share Details (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/EquityShareDetailsDetails |
| 3167 |
Implied Table |
Table |
* |
* |
implied:Table |
| 3168 |
Share Capital, Reserves And Other Equity Interest [Abstract] |
Abstract |
|
|
mt:ShareCapitalReservesAndOtherEquityInterestAbstract |
| 3169 |
Reconciliation of number of shares outstanding [abstract] |
Abstract |
|
|
ifrs-full:ReconciliationOfNumberOfSharesOutstandingAbstract |
| 3170 |
Issued shares, beginning of period (in shares) |
Concept (Shares) |
As Of |
|
ifrs-full:NumberOfSharesIssued |
| 3171 |
Movement in year (in shares) |
Concept (Shares) |
For Period |
|
ifrs-full:IncreaseDecreaseInNumberOfOrdinarySharesIssued |
| 3172 |
Issued shares, end of period (in shares) |
Concept (Shares) |
As Of |
|
ifrs-full:NumberOfSharesIssued |
| 3173 |
Treasury shares, beginning of period (in shares) |
Concept (Shares) |
As Of |
|
mt:NumberOfTreasuryShares |
| 3174 |
Movement in year (in shares) |
Concept (Shares) |
For Period |
|
mt:IncreaseDecreaseInNumberOfTreasurySharesHeld |
| 3175 |
Treasury shares, end of period (in shares) |
Concept (Shares) |
As Of |
|
mt:NumberOfTreasuryShares |
| 3176 |
Beginning balance (in shares) |
Concept (Shares) |
As Of |
|
ifrs-full:NumberOfSharesOutstanding |
| 3177 |
Movement in year (in shares) |
Concept (Shares) |
For Period |
|
ifrs-full:IncreaseDecreaseInNumberOfSharesOutstanding |
| 3178 |
Ending balance (in shares) |
Concept (Shares) |
As Of |
|
ifrs-full:NumberOfSharesOutstanding |
| 3179 |
2447404 - Disclosure - EQUITY - Equity Instruments and Hybrid Instruments (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/EquityEquityInstrumentsAndHybridInstrumentsDetails |
| 3180 |
Disclosure of detailed information about borrowings [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable |
| 3181 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 3182 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 3183 |
Mandatorily convertible subordinated notes |
Member |
|
|
mt:MandatorilyConvertibleSubordinatedNotesMember |
| 3184 |
Mandatorily convertible unsecured unsubordinated bonds |
Member |
|
|
mt:MandatorilyConvertibleUnsecuredUnsubordinatedBondsMember |
| 3185 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 3186 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 3187 |
Bottom of range |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 3188 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 3189 |
Components of equity [axis] |
Axis |
|
|
ifrs-full:ComponentsOfEquityAxis |
| 3190 |
Total Equity |
Member |
|
|
ifrs-full:EquityMember |
| 3191 |
Treasury Shares |
Member |
|
|
ifrs-full:TreasurySharesMember |
| 3192 |
Share capital |
Member |
|
|
ifrs-full:IssuedCapitalMember |
| 3193 |
Additional paid-in capital |
Member |
|
|
ifrs-full:AdditionalPaidinCapitalMember |
| 3194 |
Non-controlling interests |
Member |
|
|
ifrs-full:NoncontrollingInterestsMember |
| 3195 |
Scenario [Axis] |
Axis |
|
|
mt:Scenario1Axis |
| 3196 |
Scenario [Domain] |
Member |
|
|
mt:ScenarioDomain |
| 3197 |
Pro Forma |
Member |
|
|
mt:ProForma1Member |
| 3198 |
Disclosure of detailed information about borrowings [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems |
| 3199 |
Proceeds from issue of notes |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromIssueOfBondsNotesAndDebentures |
| 3200 |
Borrowings maturity, term (in years) |
Concept (xbrli:durationItemType) |
For Period |
|
mt:BorrowingsMaturityTerm |
| 3201 |
Borrowings issuance price percentage |
Concept (Percent) |
As Of |
|
mt:BorrowingsIssuancePricePercentage |
| 3202 |
Borrowings, interest rate |
Concept (Percent) |
As Of |
|
ifrs-full:BorrowingsInterestRate |
| 3203 |
Borrowings, convertible, conversion price |
Concept (Share) |
As Of |
|
mt:BorrowingsConvertibleConversionPrice |
| 3204 |
Borrowings, convertible, conversion price (as a percentage) |
Concept (Percent) |
As Of |
|
mt:BorrowingsConvertibleConversionPricePercentage |
| 3205 |
Borrowings |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Borrowings |
| 3206 |
Reserve of equity component of convertible instruments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ReserveOfEquityComponentOfConvertibleInstruments |
| 3207 |
Borrowings, converted instrument, shares issued |
Concept (Shares) |
For Period |
|
mt:BorrowingsConvertedInstrumentSharesIssued |
| 3208 |
Number of instruments converted |
Concept (Integer) |
For Period |
|
mt:DebtConversionOriginalDebtNumberOfInstrumentsConverted |
| 3209 |
Decrease in borrowings due to conversion |
Concept (Monetary) |
For Period |
Credit |
mt:BorrowingsIncreaseDecreaseDueToConversion |
| 3210 |
Conversion of mandatorily convertible notes |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughConversionOfConvertibleInstruments |
| 3211 |
Notional amount |
Concept (Monetary) |
As Of |
|
ifrs-full:NotionalAmount |
| 3212 |
Borrowings, convertible, call option, number of business days prior to maturity |
Concept (Integer) |
As Of |
|
mt:BorrowingsConvertibleCallOptionNumberOfBusinessDaysPriortoMaturity |
| 3213 |
Finance costs |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:FinanceCosts |
| 3214 |
Mandatory convertible bonds extension, decrease to NCI |
Concept (Monetary) |
For Period |
Credit |
mt:IncreaseDecreaseThroughExtensionOfMandatoryConvertibleInstrumentsEquity |
| 3215 |
2447405 - Disclosure - EQUITY - Earnings per Common Share (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/EquityEarningsPerCommonShareDetails |
| 3216 |
Disclosure of classes of share capital [table] |
Table |
* |
* |
ifrs-full:DisclosureOfClassesOfShareCapitalTable |
| 3217 |
Components of equity [axis] |
Axis |
|
|
ifrs-full:ComponentsOfEquityAxis |
| 3218 |
Total Equity |
Member |
|
|
ifrs-full:EquityMember |
| 3219 |
Share capital |
Member |
|
|
ifrs-full:IssuedCapitalMember |
| 3220 |
Scenario [Axis] |
Axis |
|
|
mt:Scenario1Axis |
| 3221 |
Scenario [Domain] |
Member |
|
|
mt:ScenarioDomain |
| 3222 |
Pro Forma |
Member |
|
|
mt:ProForma1Member |
| 3223 |
Disclosure of classes of share capital [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfClassesOfShareCapitalLineItems |
| 3224 |
New shares issued (in shares) |
Concept (Shares) |
For Period |
|
mt:StockIssuedDuringPeriodSharesNewIssues1 |
| 3225 |
Shares issued, price per share |
Concept (Share) |
As Of |
|
mt:SharesIssuedPricePerShare1 |
| 3226 |
Shares issued, price per share, discount percentage |
Concept (Percent) |
As Of |
|
mt:SharesIssuedPricePerShareDiscountPercentage |
| 3227 |
Shares price, theoretical ex-right price per share |
Concept (Share) |
As Of |
|
mt:SharesPriceTheoreticalExRightPricePerShare |
| 3228 |
Reverse stock split ratio |
Concept (Pure) |
For Period |
|
mt:StockholdersEquityNoteStockSplitConversionRatio1 |
| 3229 |
Net income attributable to equity holders of the parent |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossAttributableToOwnersOfParent |
| 3230 |
Weighted average common shares outstanding (in millions) for the purposes of basic earnings per share (in shares) |
Concept (Shares) |
For Period |
|
mt:WeightedAverageNumberOfOrdinarySharesOutstandingUnadjusted |
| 3231 |
Incremental shares from assumed conversion of restricted share units and performance share units (in millions) (in shares) |
Concept (Shares) |
For Period |
|
mt:DilutiveEffectOfShareBasedCompensationOnNumberOfOrdinaryShares |
| 3232 |
Weighted average common shares outstanding (in millions) for the purposes of diluted earnings per share (in shares) |
Concept (Shares) |
For Period |
|
ifrs-full:AdjustedWeightedAverageShares |
| 3233 |
2447406 - Disclosure - EQUITY - Dividends (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/EquityDividendsDetails |
| 3234 |
Dividends Payable1 [Table] |
Table |
* |
* |
mt:DividendsPayable1Table |
| 3235 |
Scenario [Axis] |
Axis |
|
|
mt:Scenario1Axis |
| 3236 |
Scenario [Domain] |
Member |
|
|
mt:ScenarioDomain |
| 3237 |
Forecast |
Member |
|
|
mt:ScenarioForecast1Member |
| 3238 |
Dividends Payable1 [Line Items] |
LineItems |
|
|
mt:DividendsPayable1LineItems |
| 3239 |
Dividend per share (in $) |
Concept (Share) |
For Period |
|
ifrs-full:DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwnersPerShare |
| 3240 |
Total (in millions of $) |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DividendPayables |
| 3241 |
2447407 - Disclosure - EQUITY - Non-wholly Owned Subsidiaries that Have Material Non-controlling Interests (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/EquityNonWhollyOwnedSubsidiariesThatHaveMaterialNonControllingInterestsDetails |
| 3242 |
Disclosure of subsidiaries [table] |
Table |
* |
* |
ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable |
| 3243 |
Subsidiaries [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInSubsidiariesAxis |
| 3244 |
Entity's total for subsidiaries [member] |
Member |
|
|
ifrs-full:EntitysTotalForSubsidiariesMember |
| 3245 |
Subsidiaries with material non-controlling interests [member] |
Member |
|
|
ifrs-full:SubsidiariesWithMaterialNoncontrollingInterestsMember |
| 3246 |
AMSA |
Member |
|
|
mt:ArcelorMittalSouthAfricaLtd.Member |
| 3247 |
Sonasid |
Member |
|
|
mt:SonasidMember |
| 3248 |
PJSC ArcelorMittal Kryvyi Rih |
Member |
|
|
mt:PJSCArcelorMittalKryvyiRihMember |
| 3249 |
Belgo Bekaert Arames (BBA) |
Member |
|
|
mt:BelgoBekaertAramesBBAMember |
| 3250 |
Hera Ermac |
Member |
|
|
mt:HeraErmacMember |
| 3251 |
AMMIC |
Member |
|
|
mt:ArcelorMittalMiningCanadaG.P.andArcelorMittalInfrastructureG.P.Member |
| 3252 |
Arceo |
Member |
|
|
mt:ArceoMember |
| 3253 |
ArcelorMittal Liberia Ltd |
Member |
|
|
mt:ArcelorMittalLiberiaLtdMember |
| 3254 |
Other |
Member |
|
|
mt:OtherSubsidiariesWithMaterialNoncontrollingInterestsMember |
| 3255 |
Nouvelles Sidérurgies Industrielles |
Member |
|
|
mt:NouvellesSidrurgiesIndustriellesMember |
| 3256 |
Legal Entity [Axis] |
Axis |
|
|
dei:LegalEntityAxis |
| 3257 |
Entity [Domain] |
Member |
|
|
dei:EntityDomain |
| 3258 |
Nouvelles Sidérurgies Industrielles |
Member |
|
|
mt:NouvellesSidrurgiesIndustriellesMember |
| 3259 |
Components of equity [axis] |
Axis |
|
|
ifrs-full:ComponentsOfEquityAxis |
| 3260 |
Total Equity |
Member |
|
|
ifrs-full:EquityMember |
| 3261 |
Non-controlling interests |
Member |
|
|
ifrs-full:NoncontrollingInterestsMember |
| 3262 |
Disclosure of subsidiaries [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems |
| 3263 |
% of non-controlling interests and non-controlling voting rights |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests |
| 3264 |
Net income / (loss) attributable to non-controlling interests |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossAttributableToNoncontrollingInterests |
| 3265 |
Non-controlling interests |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncontrollingInterests |
| 3266 |
Proportion of ownership interest in subsidiary |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestInSubsidiary |
| 3267 |
Other changes in non-controlling interest |
Concept (Monetary) |
For Period |
Credit |
mt:NoncontrollingInterestOther |
| 3268 |
Current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentAssets |
| 3269 |
Non-current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentAssets |
| 3270 |
Total assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Assets |
| 3271 |
Current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentLiabilities |
| 3272 |
Non-current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentLiabilities |
| 3273 |
Total net assets/(liabilities) |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NetAssetsLiabilities |
| 3274 |
Revenue |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:Revenue |
| 3275 |
Profit or loss from continuing operations |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLoss |
| 3276 |
Total comprehensive income (loss) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ComprehensiveIncome |
| 3277 |
Net cash provided by / (used in) operating activities |
Concept (Monetary) |
For Period |
|
ifrs-full:CashFlowsFromUsedInOperatingActivities |
| 3278 |
Net cash provided by / (used in) investing activities |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CashFlowsFromUsedInInvestingActivities |
| 3279 |
Net cash provided by / (used in) financing activities |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CashFlowsFromUsedInFinancingActivities |
| 3280 |
Impact of currency movements on cash |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents |
| 3281 |
Cash and cash equivalents: |
Abstract |
|
|
ifrs-full:CashAndCashEquivalentsAbstract |
| 3282 |
At the beginning of the year |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalents |
| 3283 |
At the end of the year |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalents |
| 3284 |
Dividend to non-controlling interests |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DividendsPaidToNoncontrollingInterests |
| 3285 |
2447408 - Disclosure - EQUITY - Transactions with Non-controlling Interests (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/EquityTransactionsWithNonControllingInterestsDetails |
| 3286 |
Disclosure of subsidiaries [table] |
Table |
* |
* |
ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable |
| 3287 |
Ownership [Axis] |
Axis |
|
|
srt:OwnershipAxis |
| 3288 |
Ownership [Domain] |
Member |
|
|
srt:OwnershipDomain |
| 3289 |
AM Investco Italy S.r.l. |
Member |
|
|
mt:AMInvestcoItalyS.r.l.Member |
| 3290 |
Brema Warmwalz GmbH & Co KG |
Member |
|
|
mt:BremaWarmwalzGmbHCoKGMember |
| 3291 |
Legal Entity [Axis] |
Axis |
|
|
dei:LegalEntityAxis |
| 3292 |
Entity [Domain] |
Member |
|
|
dei:EntityDomain |
| 3293 |
AMSA |
Member |
|
|
mt:ArcelorMittalSouthAfricaLtd.Member |
| 3294 |
Subsidiaries [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInSubsidiariesAxis |
| 3295 |
Entity's total for subsidiaries [member] |
Member |
|
|
ifrs-full:EntitysTotalForSubsidiariesMember |
| 3296 |
AMSA |
Member |
|
|
mt:ArcelorMittalSouthAfricaLtd.Member |
| 3297 |
Business combinations [axis] |
Axis |
|
|
ifrs-full:BusinessCombinationsAxis |
| 3298 |
Entity's total for business combinations [member] |
Member |
|
|
ifrs-full:EntitysTotalForBusinessCombinationsMember |
| 3299 |
AMSF |
Member |
|
|
mt:VotorantimSiderurgiaMember |
| 3300 |
Counterparties [axis] |
Axis |
|
|
ifrs-full:CounterpartiesAxis |
| 3301 |
Counterparties [member] |
Member |
|
|
ifrs-full:CounterpartiesMember |
| 3302 |
Ikageng Broad-Based Employee Share Trust |
Member |
|
|
mt:IkagengBroadBasedEmployeeShareTrustMember |
| 3303 |
Likamva Resources Proprietary Limited |
Member |
|
|
mt:LikamvaResourcesProprietaryLimitedMember |
| 3304 |
Broad-Based Social And Community Development Organizations |
Member |
|
|
mt:BroadBasedSocialAndCommunityDevelopmentOrganizationsMember |
| 3305 |
ArcelorMittal South Africa Employee Empowerment Share Trust |
Member |
|
|
mt:ArcelorMittalSouthAfricaEmployeeEmpowermentShareTrustMember |
| 3306 |
Components of equity [axis] |
Axis |
|
|
ifrs-full:ComponentsOfEquityAxis |
| 3307 |
Total Equity |
Member |
|
|
ifrs-full:EquityMember |
| 3308 |
Non-controlling interests |
Member |
|
|
ifrs-full:NoncontrollingInterestsMember |
| 3309 |
Equity attributable to the equity holders of the parent |
Member |
|
|
ifrs-full:EquityAttributableToOwnersOfParentMember |
| 3310 |
Disclosure of subsidiaries [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems |
| 3311 |
Proportion of ownership interests held by non-controlling interests |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests |
| 3312 |
Consideration transferred, acquisition-date fair value |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred |
| 3313 |
Decrease in non-controlling interests due to purchase of interest |
Concept (Monetary) |
For Period |
Debit |
mt:NoncontrollingInterestDecreasefromRedemptionsorPurchaseofInterests |
| 3314 |
Consideration payable |
Concept (Monetary) |
As Of |
Credit |
mt:ConsiderationPayableAcquisitionDateFairValue |
| 3315 |
Proceeds from issuing shares |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromIssuingShares |
| 3316 |
Repayments of bonds, notes and debentures |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RepaymentsOfBondsNotesAndDebentures |
| 3317 |
Cash flows used in obtaining control of subsidiaries or other businesses |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities |
| 3318 |
Proportion of ownership interest in subsidiary |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestInSubsidiary |
| 3319 |
Increase in non-controlling interest, percent |
Concept (Percent) |
For Period |
|
mt:ProportionOfOwnershipInterestsHeldByNoncontrollingInterestsIncreaseDecreasePercent |
| 3320 |
Period of transition of NCI from one party to another |
Concept (xbrli:durationItemType) |
For Period |
|
mt:ProportionOfOwnershipInterestsHeldByNoncontrollingInterestsPeriodOfTransitionOfInterest |
| 3321 |
Restrictions on disposal of interest, period |
Concept (xbrli:durationItemType) |
For Period |
|
mt:NoncontrollingInterestsRestrictionsOnDisposalOfInterestPeriod |
| 3322 |
Employee stock ownership plan, expense |
Concept (Monetary) |
For Period |
Debit |
mt:EmployeeStockOwnershipPlanESOPCompensationExpense1 |
| 3323 |
Notional dividends to repay notional funding and voting rights, period |
Concept (xbrli:durationItemType) |
For Period |
|
mt:NoncontrollingInterestsNotionalDividendsToRepayNotionalFundingAndVotingRightsPeriod |
| 3324 |
Proportion of voting rights held in subsidiary |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfVotingPowerHeldInSubsidiary |
| 3325 |
Equity offering in ArcelorMittal South Africa (AMSA) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughChangeInEquityOfSubsidiaries |
| 3326 |
2448402 - Disclosure - RELATED PARTIES - Narrative (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/RelatedPartiesNarrativeDetails |
| 3327 |
Disclosure of transactions between related parties [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable |
| 3328 |
Categories of related parties [axis] |
Axis |
|
|
ifrs-full:CategoriesOfRelatedPartiesAxis |
| 3329 |
Entity's total for related parties [member] |
Member |
|
|
ifrs-full:EntitysTotalForRelatedPartiesMember |
| 3330 |
Significant Shareholder |
Member |
|
|
mt:SignificantShareholderMember |
| 3331 |
Disclosure of transactions between related parties [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems |
| 3332 |
Proportion of ownership interests held by non-controlling interests |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests |
| 3333 |
2448403 - Disclosure - RELATED PARTIES - Sales and Trade Receivables (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/RelatedPartiesSalesAndTradeReceivablesDetails |
| 3334 |
Disclosure of transactions between related parties [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable |
| 3335 |
Counterparties [axis] |
Axis |
|
|
ifrs-full:CounterpartiesAxis |
| 3336 |
Counterparties [member] |
Member |
|
|
ifrs-full:CounterpartiesMember |
| 3337 |
Calvert |
Member |
|
|
mt:CalvertMember |
| 3338 |
Gonvarri Steel Industries |
Member |
|
|
mt:GonvarriSteelIndustriesMember |
| 3339 |
Macsteel |
Member |
|
|
mt:MacsteelMember |
| 3340 |
ArcelorMittal CLN Distribuzione Italia S.r.l. |
Member |
|
|
mt:ArcelorMittalCLNDistribuzioneItaliaS.r.l.Member |
| 3341 |
Borçelik |
Member |
|
|
mt:BorcelikCelikSanayiiTicaretAnonimSirketiMember |
| 3342 |
Bamesa |
Member |
|
|
mt:BamesaMember |
| 3343 |
I/N Kote L.P. |
Member |
|
|
mt:INKoteL.P.Member |
| 3344 |
Aperam Société Anonyme (Aperam) |
Member |
|
|
mt:AperamSocitAnonymeMember |
| 3345 |
ArcelorMittal RZK |
Member |
|
|
mt:ArcelorMittalRZKCelikServisMerkeziSanayiveTicaretAnonimSirketiMember |
| 3346 |
C.L.N. Coils Lamiere Nastri S.p.A. |
Member |
|
|
mt:C.L.N.CoilsLamiereNastriS.p.A.Member |
| 3347 |
Tuper S.A. |
Member |
|
|
mt:TuperS.A.Member |
| 3348 |
WDI |
Member |
|
|
mt:WDIMember |
| 3349 |
Tameh |
Member |
|
|
mt:TamehMember |
| 3350 |
Al Jubail |
Member |
|
|
mt:AlJubailMember |
| 3351 |
Other |
Member |
|
|
mt:OtherCounterpartiesMember |
| 3352 |
Categories of related parties [axis] |
Axis |
|
|
ifrs-full:CategoriesOfRelatedPartiesAxis |
| 3353 |
Entity's total for related parties [member] |
Member |
|
|
ifrs-full:EntitysTotalForRelatedPartiesMember |
| 3354 |
Joint Venture |
Member |
|
|
ifrs-full:JointVenturesWhereEntityIsVenturerMember |
| 3355 |
Associate |
Member |
|
|
ifrs-full:AssociatesMember |
| 3356 |
Other |
Member |
|
|
ifrs-full:OtherRelatedPartiesMember |
| 3357 |
Disclosure of transactions between related parties [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems |
| 3358 |
Sales |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromSaleOfGoodsRelatedPartyTransactions |
| 3359 |
Trade receivables |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:AmountsReceivableRelatedPartyTransactions |
| 3360 |
2448404 - Disclosure - RELATED PARTIES - Purchases and Trade Payables (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/RelatedPartiesPurchasesAndTradePayablesDetails |
| 3361 |
Disclosure of transactions between related parties [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable |
| 3362 |
Counterparties [axis] |
Axis |
|
|
ifrs-full:CounterpartiesAxis |
| 3363 |
Counterparties [member] |
Member |
|
|
ifrs-full:CounterpartiesMember |
| 3364 |
Tameh |
Member |
|
|
mt:TamehMember |
| 3365 |
Baffinland |
Member |
|
|
mt:BaffinlandMember |
| 3366 |
Aperam |
Member |
|
|
mt:AperamSocitAnonymeMember |
| 3367 |
Calvert |
Member |
|
|
mt:CalvertMember |
| 3368 |
CFL Cargo S.A. |
Member |
|
|
mt:CFLCargoS.A.Member |
| 3369 |
Exeltium S.A.S. |
Member |
|
|
mt:ExeltiumS.A.S.Member |
| 3370 |
Baycoat Limited Partnership |
Member |
|
|
mt:BaycoatLimitedPartnershipMember |
| 3371 |
EIMP |
Member |
|
|
mt:EmpireIronMiningPartnershipMember |
| 3372 |
Gonvarri Steel Industries |
Member |
|
|
mt:GonvarriSteelIndustriesMember |
| 3373 |
Other |
Member |
|
|
mt:OtherCounterpartiesMember |
| 3374 |
Categories of related parties [axis] |
Axis |
|
|
ifrs-full:CategoriesOfRelatedPartiesAxis |
| 3375 |
Entity's total for related parties [member] |
Member |
|
|
ifrs-full:EntitysTotalForRelatedPartiesMember |
| 3376 |
Joint Venture |
Member |
|
|
ifrs-full:JointVenturesWhereEntityIsVenturerMember |
| 3377 |
Associate |
Member |
|
|
ifrs-full:AssociatesMember |
| 3378 |
Other |
Member |
|
|
ifrs-full:OtherRelatedPartiesMember |
| 3379 |
Disclosure of transactions between related parties [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems |
| 3380 |
Purchases |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:PurchasesOfGoodsRelatedPartyTransactions |
| 3381 |
Trade payables |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:AmountsPayableRelatedPartyTransactions |
| 3382 |
Ownership interest in equity investment sold |
Concept (Percent) |
For Period |
|
mt:ProportionOfOwnershipInterestInEquityInvestmentSold |
| 3383 |
2448405 - Disclosure - RELATED PARTIES - Other Transactions With Related Parties (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/RelatedPartiesOtherTransactionsWithRelatedPartiesDetails |
| 3384 |
Disclosure of transactions between related parties [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable |
| 3385 |
Counterparties [axis] |
Axis |
|
|
ifrs-full:CounterpartiesAxis |
| 3386 |
Counterparties [member] |
Member |
|
|
ifrs-full:CounterpartiesMember |
| 3387 |
Al Jubail |
Member |
|
|
mt:ArcelorMittalTubularProductsJubailMember |
| 3388 |
AMTBA |
Member |
|
|
mt:ArcelorMittalTailoredBlanksAmericasMember |
| 3389 |
Calvert |
Member |
|
|
mt:CalvertMember |
| 3390 |
Baffinland |
Member |
|
|
mt:BaffinlandMember |
| 3391 |
Legal Entity [Axis] |
Axis |
|
|
dei:LegalEntityAxis |
| 3392 |
Entity [Domain] |
Member |
|
|
dei:EntityDomain |
| 3393 |
ArcelorMittal Calvert LLC |
Member |
|
|
mt:ArcelorMittalCalvertLLCMember |
| 3394 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 3395 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 3396 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 3397 |
Bottom of range |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 3398 |
Categories of related parties [axis] |
Axis |
|
|
ifrs-full:CategoriesOfRelatedPartiesAxis |
| 3399 |
Entity's total for related parties [member] |
Member |
|
|
ifrs-full:EntitysTotalForRelatedPartiesMember |
| 3400 |
Joint Venture |
Member |
|
|
ifrs-full:JointVenturesWhereEntityIsVenturerMember |
| 3401 |
Type of Arrangement and Non-arrangement Transactions1 [Axis] |
Axis |
|
|
mt:TypeofArrangementandNonarrangementTransactions1Axis |
| 3402 |
Type of Arrangement and Non-arrangement Transactions1 [Domain] |
Member |
|
|
mt:TypeofArrangementandNonarrangementTransactions1Domain |
| 3403 |
AM Sourcing Contract |
Member |
|
|
mt:AMSourcingContractMember |
| 3404 |
Marketing Agreement |
Member |
|
|
mt:MarketingAgreementMember |
| 3405 |
EXW Purchase Contract |
Member |
|
|
mt:EXWPurchaseContractMember |
| 3406 |
Disclosure of transactions between related parties [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems |
| 3407 |
Cash advances and loans made to related parties |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:CashAdvancesAndLoansMadeToRelatedParties |
| 3408 |
Loan receivable |
Concept (Monetary) |
As Of |
Debit |
mt:LoansReceivableRelatedParty |
| 3409 |
Loans interest rate |
Concept (Percent) |
As Of |
|
mt:LoansReceivableRelatedPartyInterestRate |
| 3410 |
Loan maturity term |
Concept (xbrli:durationItemType) |
For Period |
|
mt:LoansReceivableRelatedPartyTerm |
| 3411 |
Agreement term (in years) |
Concept (xbrli:durationItemType) |
For Period |
|
mt:RelatedPartyAgreementTerm |
| 3412 |
Annual quantity of iron ore (as a percentage) |
Concept (Percent) |
As Of |
|
mt:RelatedPartyPurchaseAgreementPercentOfAnnualProduction |
| 3413 |
Purchase agreement, annual quantity (in tonnes) |
Concept (num:massItemType) |
As Of |
|
mt:RelatedPartyPurchaseAgreementAnnualQuantity |
| 3414 |
Percentage of value of iron ore stockpiled outside sailable season |
Concept (Percent) |
As Of |
|
mt:RelatedPartyPercentageofValueofIronOreStockpiledOutsideSailableSeason |
| 3415 |
Percentage of the value of iron ore produced and hauled |
Concept (Percent) |
As Of |
|
mt:RelatedPartyPercentageoftheValueofIronOreProducedandHauled |
| 3416 |
Value of iron ore produced and hauled, maximum |
Concept (Monetary) |
As Of |
Debit |
mt:RelatedPartyValueOfIronOreProducedAndHauledMaximum |
| 3417 |
Purchase commitment, quantity covered from from off take contracts within one year of agreement date |
Concept (num:massItemType) |
As Of |
|
mt:RelatedPartyPurchaseAgreementQuantityCoveredFromOffTakeContractsWithinOneYearOfAgreement |
| 3418 |
2449401 - Disclosure - SUBSEQUENT EVENTS (Details) |
Network |
* |
* |
http://corporate.arcelormittal.com/role/SubsequentEventsDetails |
| 3419 |
Disclosure of detailed information about business combination [table] |
Table |
* |
* |
ifrs-full:DisclosureOfBusinessCombinationsTable |
| 3420 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 3421 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 3422 |
Bottom of range |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 3423 |
Top of range |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 3424 |
Joint ventures [axis] |
Axis |
|
|
ifrs-full:JointVenturesAxis |
| 3425 |
Entity's total for joint ventures [member] |
Member |
|
|
ifrs-full:EntitysTotalForJointVenturesMember |
| 3426 |
Essar Steel India Limited |
Member |
|
|
mt:EssarSteelIndiaLimitedMember |
| 3427 |
Subsequent Event Type1 [Axis] |
Axis |
|
|
mt:SubsequentEventType1Axis |
| 3428 |
Subsequent Event Type1 [Domain] |
Member |
|
|
mt:SubsequentEventType1Domain |
| 3429 |
Subsequent Event |
Member |
|
|
mt:SubsequentEvent1Member |
| 3430 |
Disclosure of detailed information about business combination [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfBusinessCombinationsLineItems |
| 3431 |
Payments to acquire interests in joint venture, upfront payment |
Concept (Monetary) |
For Period |
Credit |
mt:OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivitiesUpfrontPayment |
| 3432 |
Payments to acquire interests in joint venture, capital injection |
Concept (Monetary) |
For Period |
Credit |
mt:OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivitiesCapitalInjection |
| 3433 |
Production capacity of joint venture, current annual quantity (in tonnes) |
Concept (num:massItemType) |
For Period |
|
mt:ProductionCapacityOfJointVentureCurrentAnnualQuantity |
| 3434 |
Production capacity of joint venture, target medium-term annual quantity (in tonnes) |
Concept (num:massItemType) |
For Period |
|
mt:ProductionCapacityOfJointVentureTargetMediumTermAnnualQuantity |
| 3435 |
Production capacity of joint venture, target long-term annual quantity (in tonnes) |
Concept (num:massItemType) |
For Period |
|
mt:ProductionCapacityOfJointVentureTargetLongTermAnnualQuantity |
| 3436 |
Share buyback (in shares) |
Concept (Shares) |
For Period |
|
mt:StockRepurchasedDuringPeriodShares1 |
| 3437 |
Share buyback, value |
Concept (Monetary) |
For Period |
Debit |
mt:StockRepurchasedDuringPeriodValue |
| 3438 |
Share buyback, value per share |
Concept (Share) |
For Period |
|
mt:StockRepurchasedDuringPeriodValuePerShare |