| Line |
Label |
Object Class |
Period Type |
Balance |
Report ElementName |
| 1 |
00090 - Document - Document and Entity Information |
Network |
* |
* |
http://ferroglobe.com/role/DocumentDocumentAndEntityInformation |
| 2 |
Implied Table |
Table |
* |
* |
implied:Table |
| 3 |
Document and Entity Information [Abstract] |
Abstract |
|
|
gsm:DocumentAndEntityInformationAbstract |
| 4 |
Entity Registrant Name |
Concept (Text/String) |
For Period |
|
dei:EntityRegistrantName |
| 5 |
Entity Central Index Key |
Concept (CIK Number) |
For Period |
|
dei:EntityCentralIndexKey |
| 6 |
Document Type |
Concept (Submission Type) |
For Period |
|
dei:DocumentType |
| 7 |
Document Period End Date |
Concept (Date) |
For Period |
|
dei:DocumentPeriodEndDate |
| 8 |
Amendment Flag |
Concept (Yes/No) |
For Period |
|
dei:AmendmentFlag |
| 9 |
Current Fiscal Year End Date |
Concept (Month/Day) |
For Period |
|
dei:CurrentFiscalYearEndDate |
| 10 |
Entity Well-known Seasoned Issuer |
Concept (Yes/No) |
For Period |
|
dei:EntityWellKnownSeasonedIssuer |
| 11 |
Entity Voluntary Filers |
Concept (Yes/No) |
For Period |
|
dei:EntityVoluntaryFilers |
| 12 |
Entity Current Reporting Status |
Concept (Yes/No) |
For Period |
|
dei:EntityCurrentReportingStatus |
| 13 |
Entity Filer Category |
Concept (Filer Category) |
For Period |
|
dei:EntityFilerCategory |
| 14 |
Entity Common Stock, Shares Outstanding |
Concept (Shares) |
As Of |
|
dei:EntityCommonStockSharesOutstanding |
| 15 |
Entity Emerging Growth Company |
Concept (Yes/No) |
For Period |
|
dei:EntityEmergingGrowthCompany |
| 16 |
Entity Shell Company |
Concept (Yes/No) |
For Period |
|
dei:EntityShellCompany |
| 17 |
Document Fiscal Year Focus |
Concept (Year) |
For Period |
|
dei:DocumentFiscalYearFocus |
| 18 |
Document Fiscal Period Focus |
Concept (Fiscal Period) |
For Period |
|
dei:DocumentFiscalPeriodFocus |
| 19 |
00100 - Statement - CONSOLIDATED STATEMENT OF FINANCIAL POSITION |
Network |
* |
* |
http://ferroglobe.com/role/StatementConsolidatedStatementOfFinancialPosition |
| 20 |
Implied Table |
Table |
* |
* |
implied:Table |
| 21 |
CONSOLIDATED STATEMENT OF FINANCIAL POSITION |
Abstract |
|
|
ifrs-full:StatementOfFinancialPositionAbstract |
| 22 |
ASSETS |
Abstract |
|
|
ifrs-full:AssetsAbstract |
| 23 |
Non-current assets |
Abstract |
|
|
ifrs-full:NoncurrentAssetsAbstract |
| 24 |
Goodwill |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Goodwill |
| 25 |
Other intangible assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IntangibleAssetsOtherThanGoodwill |
| 26 |
Property, plant and equipment |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PropertyPlantAndEquipment |
| 27 |
Other non-current financial assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentFinancialAssets |
| 28 |
Deferred tax assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NetDeferredTaxAssets |
| 29 |
Non-current receivables from related parties |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentReceivablesDueFromRelatedParties |
| 30 |
Other non-current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherNoncurrentAssets |
| 31 |
Total non-current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentAssets |
| 32 |
Current assets |
Abstract |
|
|
ifrs-full:CurrentAssetsAbstract |
| 33 |
Inventories |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InventoriesTotal |
| 34 |
Trade and other receivables |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:TradeAndOtherCurrentReceivables |
| 35 |
Current receivables from related parties |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:TradeAndOtherCurrentReceivablesDueFromRelatedParties |
| 36 |
Current income tax assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentTaxAssetsCurrent |
| 37 |
Other current financial assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentFinancialAssets |
| 38 |
Other current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherCurrentAssets |
| 39 |
Cash and cash equivalents |
Concept (Monetary) |
As Of |
Debit |
gsm:CashAndCashEquivalentsFromContinuedOperations |
| 40 |
Total current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentAssets |
| 41 |
Total assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Assets |
| 42 |
EQUITY AND LIABILITIES |
Abstract |
|
|
ifrs-full:EquityAndLiabilitiesAbstract |
| 43 |
Equity |
Abstract |
|
|
ifrs-full:EquityAbstract |
| 44 |
Share capital |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:IssuedCapital |
| 45 |
Reserves |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherReserves |
| 46 |
Translation differences |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ReserveOfExchangeDifferencesOnTranslation |
| 47 |
Valuation adjustments |
Concept (Monetary) |
As Of |
Credit |
gsm:AccumulatedValuationAdjustments |
| 48 |
Result attributable to the Parent |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:EquityAttributableToOwnersOfParent |
| 49 |
Non-controlling interests |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncontrollingInterests |
| 50 |
Total equity |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Equity |
| 51 |
Non-current liabilities |
Abstract |
|
|
ifrs-full:NoncurrentLiabilitiesAbstract |
| 52 |
Deferred income |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DeferredIncome |
| 53 |
Provisions |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentProvisions |
| 54 |
Bank borrowings |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LongtermBorrowings |
| 55 |
Obligations under finance leases |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentFinanceLeaseLiabilities |
| 56 |
Debt instruments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentDebtInstrumentsIssued |
| 57 |
Other financial liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherNoncurrentFinancialLiabilities |
| 58 |
Other non-current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherNoncurrentNonfinancialLiabilities |
| 59 |
Deferred tax liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NetDeferredTaxLiabilities |
| 60 |
Total non-current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentLiabilities |
| 61 |
Current liabilities |
Abstract |
|
|
ifrs-full:CurrentLiabilitiesAbstract |
| 62 |
Provisions |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentProvisions |
| 63 |
Bank borrowings |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ShorttermBorrowings |
| 64 |
Obligations under finance leases |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentFinanceLeaseLiabilities |
| 65 |
Debt instruments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentDebtInstrumentsIssued |
| 66 |
Other financial liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherCurrentFinancialLiabilities |
| 67 |
Payables to related parties |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties |
| 68 |
Trade and other payables |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:TradeAndOtherCurrentPayables |
| 69 |
Current income tax liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentTaxLiabilitiesCurrent |
| 70 |
Other current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherCurrentLiabilities |
| 71 |
Total current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentLiabilities |
| 72 |
Total equity and liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:EquityAndLiabilities |
| 73 |
00200 - Statement - CONSOLIDATED INCOME STATEMENT |
Network |
* |
* |
http://ferroglobe.com/role/StatementConsolidatedIncomeStatement |
| 74 |
Implied Table |
Table |
* |
* |
implied:Table |
| 75 |
CONSOLIDATED INCOME STATEMENT |
Abstract |
|
|
ifrs-full:IncomeStatementAbstract |
| 76 |
Profit (loss) [abstract] |
Abstract |
|
|
ifrs-full:ProfitLossAbstract |
| 77 |
Sales |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromContractsWithCustomers |
| 78 |
Cost of sales |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CostOfSales |
| 79 |
Other operating income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherIncome |
| 80 |
Staff costs |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:EmployeeBenefitsExpense |
| 81 |
Other operating expense |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:OtherExpenseByNature |
| 82 |
Depreciation and amortization charges, operating allowances and write-downs |
Concept (Monetary) |
For Period |
Debit |
gsm:DepreciationAndAmortizationChargesOperatingAllowancesAndWriteDowns |
| 83 |
Impairment losses |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ImpairmentLossRecognisedInProfitOrLoss |
| 84 |
Net (loss) gain due to changes in the value of assets |
Concept (Monetary) |
For Period |
|
ifrs-full:GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssets |
| 85 |
Gain (loss) on disposal of non-current assets |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation |
| 86 |
Bargain purchase gain |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainRecognisedInBargainPurchaseTransaction |
| 87 |
Other losses |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherGainsLosses |
| 88 |
Operating profit (loss) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossFromOperatingActivities |
| 89 |
Finance income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:FinanceIncome |
| 90 |
Finance costs |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:FinanceCosts |
| 91 |
Financial derivative gain (loss) |
Concept (Monetary) |
For Period |
Credit |
gsm:GainLossOnFinancialDerivative |
| 92 |
Exchange differences |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss |
| 93 |
Profit (loss) before tax |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossBeforeTax |
| 94 |
Income tax (expense) benefit |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncomeTaxExpenseContinuingOperations |
| 95 |
Profit (loss) for the year |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLoss |
| 96 |
Loss attributable to non-controlling interests |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossAttributableToNoncontrollingInterests |
| 97 |
Profit (loss) attributable to the Parent |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossAttributableToOwnersOfParent |
| 98 |
Earnings per share |
Abstract |
|
|
ifrs-full:EarningsPerShareAbstract |
| 99 |
Earnings Per Share Continued And Discontinued Operations [Abstract] |
Abstract |
|
|
gsm:EarningsPerShareContinuedAndDiscontinuedOperationsAbstract |
| 100 |
Profit (loss) attributable to the Parent (US$'000) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity |
| 101 |
Weighted average basic shares outstanding |
Concept (Shares) |
For Period |
|
ifrs-full:WeightedAverageShares |
| 102 |
Basic earnings (loss) per ordinary share (US$) |
Concept (Share) |
For Period |
|
ifrs-full:BasicEarningsLossPerShare |
| 103 |
Effect of dilutive securities |
Concept (Shares) |
For Period |
|
gsm:DilutiveEffectOfSecuritiesOnWeightedAverageNumberOfOrdinarySharesOutstanding |
| 104 |
Weighted average dilutive shares outstanding |
Concept (Shares) |
For Period |
|
ifrs-full:AdjustedWeightedAverageShares |
| 105 |
Diluted earnings (loss) per ordinary share (US$) |
Concept (Share) |
For Period |
|
ifrs-full:DilutedEarningsLossPerShare |
| 106 |
00300 - Statement - CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) |
Network |
* |
* |
http://ferroglobe.com/role/StatementConsolidatedStatementOfComprehensiveIncomeLoss |
| 107 |
Implied Table |
Table |
* |
* |
implied:Table |
| 108 |
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) |
Abstract |
|
|
ifrs-full:StatementOfComprehensiveIncomeAbstract |
| 109 |
Net profit (loss) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLoss |
| 110 |
Items that will not be reclassified subsequently to income or loss: |
Abstract |
|
|
ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract |
| 111 |
Defined benefit obligation |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans |
| 112 |
Tax effect |
Concept (Monetary) |
For Period |
Debit |
gsm:TaxEffectOfGainsLossesOnComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss |
| 113 |
Total |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax |
| 114 |
Items that may be reclassified subsequently to income or loss: |
Abstract |
|
|
ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract |
| 115 |
Arising from cash flow hedges |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnCashFlowHedgesNetOfTax |
| 116 |
Translation differences |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax |
| 117 |
Total income and expense recognized directly in equity |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax |
| 118 |
Items that have been reclassified to income or loss in the period: |
Abstract |
|
|
gsm:ComponentsOfOtherComprehensiveIncomeThatHaveBeenReclassifiedToProfitOrLossNetOfTaxAbstract |
| 119 |
Arising from cash flow hedges |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax |
| 120 |
Tax effect |
Concept (Monetary) |
For Period |
Debit |
gsm:TaxEffectOfReclassificationAdjustmentsThatHaveBeenReclassifiedToProfitOrLoss |
| 121 |
Total transfers to income or loss |
Concept (Monetary) |
For Period |
Debit |
gsm:OtherComprehensiveIncomeThatHasBeenReclassifiedToProfitOrLossNetOfTax |
| 122 |
Other comprehensive (loss) income for the year, net of income tax |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherComprehensiveIncome |
| 123 |
Total comprehensive income (loss) for the year |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ComprehensiveIncome |
| 124 |
Attributable to the Parent |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent |
| 125 |
Attributable to non-controlling interests |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests |
| 126 |
00400 - Statement - CONSOLIDATED STATEMENT OF CHANGES IN EQUITY |
Network |
* |
* |
http://ferroglobe.com/role/StatementConsolidatedStatementOfChangesInEquity |
| 127 |
Statement of changes in equity [table] |
Table |
* |
* |
ifrs-full:StatementOfChangesInEquityTable |
| 128 |
Components of equity [axis] |
Axis |
|
|
ifrs-full:ComponentsOfEquityAxis |
| 129 |
Equity [member] |
Member |
|
|
ifrs-full:EquityMember |
| 130 |
Equity attributable to owners of parent. |
Member |
|
|
ifrs-full:EquityAttributableToOwnersOfParentMember |
| 131 |
Share Capital |
Member |
|
|
ifrs-full:IssuedCapitalMember |
| 132 |
Reserves |
Member |
|
|
ifrs-full:OtherReservesMember |
| 133 |
Translation Difference |
Member |
|
|
ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember |
| 134 |
Valuation Adjustments |
Member |
|
|
gsm:ValuationAdjustmentsMember |
| 135 |
Result for the Year |
Member |
|
|
gsm:ProfitForPeriodAttributableToParentMember |
| 136 |
Noncontrolling interests |
Member |
|
|
ifrs-full:NoncontrollingInterestsMember |
| 137 |
Statement of changes in equity [line items] |
LineItems |
|
|
ifrs-full:StatementOfChangesInEquityLineItems |
| 138 |
Shares outstanding at beginning of period |
Concept (Shares) |
As Of |
|
gsm:IfrsSharesOutstanding |
| 139 |
Equity at beginning of period |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Equity |
| 140 |
Comprehensive (loss) income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ComprehensiveIncome |
| 141 |
Issue of share capital |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IssueOfEquity |
| 142 |
Shares issued (in shares) |
Concept (Shares) |
As Of |
|
ifrs-full:NumberOfSharesIssued |
| 143 |
Share-based compensation |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions |
| 144 |
Cash settlement of equity awards |
Concept (Monetary) |
For Period |
Credit |
gsm:IncreaseDecreaseThroughCashSettlementOfEquityAwards |
| 145 |
Share decrease (net effect) |
Concept (Monetary) |
For Period |
Credit |
gsm:IncreaseDecreaseIssuedCapital |
| 146 |
Share issuance costs |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ShareIssueRelatedCost |
| 147 |
Dividends paid |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:DividendsPaid |
| 148 |
Dividends paid to joint venture partner |
Concept (Monetary) |
For Period |
Debit |
gsm:DividendsPaidToJointVenturePartner |
| 149 |
Distribution of profit (loss) |
Concept (Monetary) |
For Period |
Credit |
gsm:IncreaseDecreaseDistributionOfProfitLoss |
| 150 |
Own shares acquired |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:PurchaseOfTreasuryShares |
| 151 |
Own shares acquired (in shares) |
Concept (Shares) |
For Period |
|
gsm:DecreaseThroughPurchaseOfOwnShares |
| 152 |
Non-controlling interest arising on the acquisition |
Concept (Monetary) |
For Period |
Credit |
gsm:IncreaseDecreaseOnNoncontrollingInterestAcquired |
| 153 |
Other changes |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity |
| 154 |
Equity at end of period |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Equity |
| 155 |
Shares outstanding at end of period |
Concept (Shares) |
As Of |
|
gsm:IfrsSharesOutstanding |
| 156 |
00500 - Statement - CONSOLIDATED STATEMENT OF CASH FLOWS |
Network |
* |
* |
http://ferroglobe.com/role/StatementConsolidatedStatementOfCashFlows |
| 157 |
Implied Table |
Table |
* |
* |
implied:Table |
| 158 |
CONSOLIDATED STATEMENT OF CASH FLOWS |
Abstract |
|
|
ifrs-full:StatementOfCashFlowsAbstract |
| 159 |
Cash flows from operating activities: |
Abstract |
|
|
ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract |
| 160 |
Profit (loss) for the year |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLoss |
| 161 |
Adjustments to reconcile net profit (loss) to net cash provided by operating activities: |
Abstract |
|
|
gsm:AdjustmentsToReconcileNetProfitLossToNetCashProvidedByOperatingActivitiesAbstract |
| 162 |
Income tax expense (benefit) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForIncomeTaxExpense |
| 163 |
Depreciation and amortization charges, operating allowances and write-downs |
Concept (Monetary) |
For Period |
Debit |
gsm:AdjustmentsForDepreciationAndAmortizationChargesOperatingAllowancesAndWriteDowns |
| 164 |
Finance income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:AdjustmentsForFinanceIncome |
| 165 |
Finance costs |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForFinanceCosts |
| 166 |
Financial derivative (gain) loss |
Concept (Monetary) |
For Period |
Debit |
gsm:AdjustmentsForFinancialDerivativeGainsLosses |
| 167 |
Exchange differences |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForUnrealisedForeignExchangeLossesGains |
| 168 |
Impairment losses |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss |
| 169 |
Bargain purchase gain |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainRecognisedInBargainPurchaseTransaction |
| 170 |
Loss (gain) due to changes in the value of assets |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForFairValueGainsLosses |
| 171 |
(Gain) loss on disposal of non-current assets |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets |
| 172 |
Share-based compensation |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities |
| 173 |
Other loss |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:OtherAdjustmentsToReconcileProfitLoss |
| 174 |
Changes in operating assets and liabilities: |
Abstract |
|
|
gsm:IncreaseDecreaseInWorkingCapitalAbstract |
| 175 |
(Increase) decrease in inventories |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForDecreaseIncreaseInInventories |
| 176 |
(Increase) decrease in trade and other receivables |
Concept (Monetary) |
For Period |
Debit |
gsm:AdjustmentsForDecreaseIncreaseInTradeAccountsAndOtherReceivable |
| 177 |
Increase in trade and other payables |
Concept (Monetary) |
For Period |
Debit |
gsm:AdjustmentsForDecreaseIncreaseInTradeAccountsAndOtherPayables |
| 178 |
Other amounts paid due to operating activities |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities |
| 179 |
Income tax paid |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncomeTaxesPaidRefundClassifiedAsOperatingActivities |
| 180 |
Interest paid |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:InterestPaidClassifiedAsOperatingActivities |
| 181 |
Net cash provided by operating activities |
Concept (Monetary) |
For Period |
|
ifrs-full:CashFlowsFromUsedInOperatingActivities |
| 182 |
Cash flows from investing activities: |
Abstract |
|
|
ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract |
| 183 |
Interest and finance income received |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:InterestReceivedClassifiedAsInvestingActivities |
| 184 |
Payments due to investments: |
Abstract |
|
|
gsm:OutflowsOfCashFromInvestingActivitiesAbstract |
| 185 |
Acquisition of subsidiaries |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PaymentsFromChangesInOwnershipInterestsInSubsidiaries |
| 186 |
Other intangible assets |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities |
| 187 |
Property, plant and equipment |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities |
| 188 |
Other financial assets |
Concept (Monetary) |
For Period |
Credit |
gsm:PurchaseOfNonCurrentFinancialAssetsClassifiedAsInvestingActivities |
| 189 |
Disposals: |
Abstract |
|
|
gsm:InflowsOfCashFromInvestingActivitiesAbstract |
| 190 |
Disposal of subsidiaries |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromChangesInOwnershipInterestsInSubsidiaries |
| 191 |
Other non-current assets |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromOtherLongtermAssetsClassifiedAsInvestingActivities |
| 192 |
Other |
Concept (Monetary) |
For Period |
Debit |
gsm:ProceedsFromSalesOfOtherAssetsClassifiedAsInvestingActivities |
| 193 |
Net cash used by investing activities |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CashFlowsFromUsedInInvestingActivities |
| 194 |
Cash flows from financing activities: |
Abstract |
|
|
ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract |
| 195 |
Dividends paid |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DividendsPaidClassifiedAsFinancingActivities |
| 196 |
Payment for debt issuance costs |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PaymentsForDebtIssueCosts |
| 197 |
Repayment of other financial liabilities |
Concept (Monetary) |
For Period |
Credit |
gsm:RepaymentsOfOtherFinancialLiabilities |
| 198 |
Proceeds from debt issuance |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromIssueOfBondsNotesAndDebentures |
| 199 |
Increase (decrease) in bank borrowings: |
Abstract |
|
|
gsm:CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowingsAbstract |
| 200 |
Borrowings |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities |
| 201 |
Payments |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities |
| 202 |
Proceeds from stock option exercises |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromExerciseOfOptions |
| 203 |
Other amounts (paid) received due to financing activities |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities |
| 204 |
Payments to acquire or redeem own shares |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PaymentsToAcquireOrRedeemEntitysShares |
| 205 |
Net cash provided (used) by financing activities |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CashFlowsFromUsedInFinancingActivities |
| 206 |
Total net cash flows for the year |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges |
| 207 |
Beginning balance of cash and cash equivalents |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalents |
| 208 |
Exchange differences on cash and cash equivalents in foreign currencies |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents |
| 209 |
Ending balance of cash and cash equivalents |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalents |
| 210 |
10101 - Disclosure - General Information |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureGeneralInformation |
| 211 |
Implied Table |
Table |
* |
* |
implied:Table |
| 212 |
General Information [Abstract] |
Abstract |
|
|
gsm:GeneralInformationAbstract |
| 213 |
General information |
Concept (Text Block (HTML)) |
For Period |
|
gsm:DisclosureOfGeneralInformationAboutEntityTextBlock |
| 214 |
10201 - Disclosure - Organization and Subsidiaries |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOrganizationAndSubsidiaries |
| 215 |
Implied Table |
Table |
* |
* |
implied:Table |
| 216 |
Disclosure Of Organization and Subsidiaries [Abstract] |
Abstract |
|
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gsm:DisclosureOfOrganizationAndSubsidiariesAbstract |
| 217 |
Organization and Subsidiaries |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory |
| 218 |
10301 - Disclosure - Basis of presentation and basis of consolidation |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureBasisOfPresentationAndBasisOfConsolidation |
| 219 |
Implied Table |
Table |
* |
* |
implied:Table |
| 220 |
Disclosure Of Basis Of Presentation And Basis Of Consolidation [Abstract] |
Abstract |
|
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gsm:DisclosureOfBasisOfPresentationAndBasisOfConsolidationAbstract |
| 221 |
Basis of presentation and basis of consolidation |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfBasisOfPresentationAndBasisOfConsolidationTextBlock |
| 222 |
10401 - Disclosure - Accounting policies |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureAccountingPolicies |
| 223 |
Implied Table |
Table |
* |
* |
implied:Table |
| 224 |
Disclosure of initial application of standards or interpretations [abstract] |
Abstract |
|
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ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsAbstract |
| 225 |
Accounting policies |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory |
| 226 |
10501 - Disclosure - Business Combinations |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureBusinessCombinations |
| 227 |
Implied Table |
Table |
* |
* |
implied:Table |
| 228 |
Disclosure of detailed information about business combination [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfBusinessCombinationsAbstract |
| 229 |
Business Combinations |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfBusinessCombinationsExplanatory |
| 230 |
10601 - Disclosure - Segment reporting |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureSegmentReporting |
| 231 |
Implied Table |
Table |
* |
* |
implied:Table |
| 232 |
Disclosure of operating segments [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfOperatingSegmentsAbstract |
| 233 |
Segment reporting |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory |
| 234 |
10701 - Disclosure - Goodwill |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureGoodwill |
| 235 |
Implied Table |
Table |
* |
* |
implied:Table |
| 236 |
Disclosure of reconciliation of changes in goodwill [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillAbstract |
| 237 |
Goodwill |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfGoodwillExplanatory |
| 238 |
10801 - Disclosure - Other intangible assets |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherIntangibleAssets |
| 239 |
Implied Table |
Table |
* |
* |
implied:Table |
| 240 |
Disclosure of detailed information about intangible assets [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfIntangibleAssetsAbstract |
| 241 |
Other intangible assets |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory |
| 242 |
10901 - Disclosure - Property, plant and equipment |
Network |
* |
* |
http://ferroglobe.com/role/DisclosurePropertyPlantAndEquipment |
| 243 |
Implied Table |
Table |
* |
* |
implied:Table |
| 244 |
Disclosure of detailed information about property, plant and equipment [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract |
| 245 |
Property, plant and equipment |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory |
| 246 |
11001 - Disclosure - Financial assets and other receivables |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFinancialAssetsAndOtherReceivables |
| 247 |
Implied Table |
Table |
* |
* |
implied:Table |
| 248 |
Other financial assets |
Abstract |
|
|
ifrs-full:DisclosureOfFinancialAssetsAbstract |
| 249 |
Financial assets and other receivables |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfFinancialAssetsExplanatory |
| 250 |
11101 - Disclosure - Inventories |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureInventories |
| 251 |
Implied Table |
Table |
* |
* |
implied:Table |
| 252 |
Inventories. |
Abstract |
|
|
ifrs-full:ClassesOfInventoriesAbstract |
| 253 |
Inventories |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfInventoriesExplanatory |
| 254 |
11201 - Disclosure - Other assets |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherAssets |
| 255 |
Implied Table |
Table |
* |
* |
implied:Table |
| 256 |
Other assets abstract |
Abstract |
|
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gsm:OtherAssetAbstract |
| 257 |
Other assets |
Concept (Text Block (HTML)) |
For Period |
|
gsm:DisclosureOfOtherAssetsTextBlock |
| 258 |
11301 - Disclosure - Equity |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureEquity |
| 259 |
Implied Table |
Table |
* |
* |
implied:Table |
| 260 |
Equity [abstract] |
Abstract |
|
|
ifrs-full:EquityAbstract |
| 261 |
Equity |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory |
| 262 |
11401 - Disclosure - Earnings (loss) per ordinary share |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureEarningsLossPerOrdinaryShare |
| 263 |
Implied Table |
Table |
* |
* |
implied:Table |
| 264 |
Earnings per share [abstract] |
Abstract |
|
|
ifrs-full:EarningsPerShareAbstract |
| 265 |
Earnings (loss) per ordinary share |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfEarningsPerShareExplanatory |
| 266 |
11501 - Disclosure - Provisions |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureProvisions |
| 267 |
Implied Table |
Table |
* |
* |
implied:Table |
| 268 |
Provisions [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfOtherProvisionsAbstract |
| 269 |
Provisions |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfProvisionsExplanatory |
| 270 |
11601 - Disclosure - Bank borrowings |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureBankBorrowings |
| 271 |
Implied Table |
Table |
* |
* |
implied:Table |
| 272 |
Disclosure of detailed information about borrowings [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsAbstract |
| 273 |
Bank borrowings |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfBorrowingsExplanatory |
| 274 |
11701 - Disclosure - Leases |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureLeases |
| 275 |
Implied Table |
Table |
* |
* |
implied:Table |
| 276 |
Disclosure of finance lease and operating lease by lessee [abstract] |
Abstract |
|
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ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeAbstract |
| 277 |
Leases |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfLeasesExplanatory |
| 278 |
11801 - Disclosure - Debt instruments |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureDebtInstruments |
| 279 |
Implied Table |
Table |
* |
* |
implied:Table |
| 280 |
Disclosure of detailed information about borrowings [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsAbstract |
| 281 |
Debt instruments |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfDebtSecuritiesExplanatory |
| 282 |
11901 - Disclosure - Other financial Liabilities |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherFinancialLiabilities |
| 283 |
Implied Table |
Table |
* |
* |
implied:Table |
| 284 |
Disclosure of financial liabilities [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfFinancialLiabilitiesAbstract |
| 285 |
Other financial liabilities |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfFinancialLiabilitiesExplanatory |
| 286 |
12001 - Disclosure - Trade and other payables |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureTradeAndOtherPayables |
| 287 |
Implied Table |
Table |
* |
* |
implied:Table |
| 288 |
Trade and other payables. |
Abstract |
|
|
ifrs-full:TradeAndOtherPayablesAbstract |
| 289 |
Trade and other payables |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfTradeAndOtherPayablesExplanatory |
| 290 |
12101 - Disclosure - Other liabilities |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherLiabilities |
| 291 |
Implied Table |
Table |
* |
* |
implied:Table |
| 292 |
Other liabilities |
Abstract |
|
|
gsm:IfrsOtherLiabilitiesAbstract |
| 293 |
Other liabilities |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfOtherLiabilitiesExplanatory |
| 294 |
12201 - Disclosure - Tax matters |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureTaxMatters |
| 295 |
Implied Table |
Table |
* |
* |
implied:Table |
| 296 |
Tax matters |
Abstract |
|
|
ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract |
| 297 |
Tax matters |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfIncomeTaxExplanatory |
| 298 |
12301 - Disclosure - Related party transactions and balances |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureRelatedPartyTransactionsAndBalances |
| 299 |
Implied Table |
Table |
* |
* |
implied:Table |
| 300 |
Related party transactions and balances |
Abstract |
|
|
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract |
| 301 |
Related party transactions and balances |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfRelatedPartyExplanatory |
| 302 |
12401 - Disclosure - Guarantee commitments to third parties and contingent liabilities |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureGuaranteeCommitmentsToThirdPartiesAndContingentLiabilities |
| 303 |
Implied Table |
Table |
* |
* |
implied:Table |
| 304 |
Guarantee commitments to third parties and contingent liabilities |
Abstract |
|
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gsm:DisclosureOfCommitmentsContingentAssetsAndLiabilitiesAbstract |
| 305 |
Guarantee commitments to third parties and contingent liabilities |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory |
| 306 |
12501 - Disclosure - Income and expenses |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureIncomeAndExpenses |
| 307 |
Implied Table |
Table |
* |
* |
implied:Table |
| 308 |
Income and expenses |
Abstract |
|
|
ifrs-full:AnalysisOfIncomeAndExpenseAbstract |
| 309 |
Income and expenses |
Concept (Text Block (HTML)) |
For Period |
|
gsm:DisclosureOfIncomeAndExpensesTextBlock |
| 310 |
12601 - Disclosure - Remuneration of key management personnel |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureRemunerationOfKeyManagementPersonnel |
| 311 |
Implied Table |
Table |
* |
* |
implied:Table |
| 312 |
Remuneration of key management personnel |
Abstract |
|
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gsm:DisclosureOfRemunerationAndOtherBenefitsPaidToKeyManagementPersonnelAbstract |
| 313 |
Remuneration of key management personnel |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfRemunerationAndOtherBenefitsPaidToKeyManagementPersonnelTextBlock |
| 314 |
12701 - Disclosure - Financial risk management |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFinancialRiskManagement |
| 315 |
Implied Table |
Table |
* |
* |
implied:Table |
| 316 |
Financial risk management |
Abstract |
|
|
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsAbstract |
| 317 |
Financial risk management |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfFinancialRiskManagementExplanatory |
| 318 |
12801 - Disclosure - Fair value measurement |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFairValueMeasurement |
| 319 |
Implied Table |
Table |
* |
* |
implied:Table |
| 320 |
Disclosure of financial liabilities [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfFinancialLiabilitiesAbstract |
| 321 |
Fair value measurement |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfFairValueMeasurementExplanatory |
| 322 |
12901 - Disclosure - Non-current assets held for sale |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureNonCurrentAssetsHeldForSale |
| 323 |
Implied Table |
Table |
* |
* |
implied:Table |
| 324 |
Non-current assets held for sale |
Abstract |
|
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ifrs-full:NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwnersAbstract |
| 325 |
Non-current assets held for sale |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfNoncurrentAssetsHeldForSaleAndDiscontinuedOperationsExplanatory |
| 326 |
13001 - Disclosure - Events after the reporting period |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureEventsAfterReportingPeriod |
| 327 |
Implied Table |
Table |
* |
* |
implied:Table |
| 328 |
Events after the reporting period |
Abstract |
|
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ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodAbstract |
| 329 |
Events after the reporting period |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory |
| 330 |
20402 - Disclosure - Accounting policies (Policies) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureAccountingPoliciesPolicies |
| 331 |
Implied Table |
Table |
* |
* |
implied:Table |
| 332 |
Disclosure of initial application of standards or interpretations [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsAbstract |
| 333 |
Goodwill |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DescriptionOfAccountingPolicyForGoodwillExplanatory |
| 334 |
Other intangible assets |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory |
| 335 |
Property, plant and equipment |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory |
| 336 |
Impairment of property, plant and equipment, intangible assets and goodwill |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory |
| 337 |
Financial instruments |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DescriptionOfAccountingPolicyForFinancialAssetsExplanatory |
| 338 |
Derivative financial instruments and hedging activities |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DescriptionOfAccountingPolicyForDerivativeFinancialInstrumentsExplanatory |
| 339 |
Fair value measurement |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DescriptionOfAccountingPolicyForFairValueMeasurementExplanatory |
| 340 |
Inventories |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories |
| 341 |
Biological assets |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForBiologicalAssetsExplanatory |
| 342 |
Cash and cash equivalents |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents |
| 343 |
Provisions and contingencies |
Concept (Text Block (HTML)) |
For Period |
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gsm:DescriptionOfAccountingPolicyForProvisionsAndContingenciesPolicyTextBlock |
| 344 |
Leases |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory |
| 345 |
Current assets and liabilities |
Concept (Text Block (HTML)) |
For Period |
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gsm:DescriptionOfAccountingPolicyForDeterminingCurrentAssetsAndLiabilitiesPolicyTextBlock |
| 346 |
Income taxes |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory |
| 347 |
Foreign currency transactions |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory |
| 348 |
Revenue recognition |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue |
| 349 |
Expense recognition |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DescriptionOfAccountingPolicyForExpensesExplanatory |
| 350 |
Grants |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DescriptionOfAccountingPolicyForGovernmentGrants |
| 351 |
Termination benefits |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DescriptionOfAccountingPolicyForTerminationBenefits |
| 352 |
CO2 emission allowances |
Concept (Text Block (HTML)) |
For Period |
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gsm:DescriptionOfAccountingPolicyForCo2EmissionAllowancesPolicyTextBlock |
| 353 |
Share-based compensation |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory |
| 354 |
Assets and disposal groups classified as held for sale, liabilities associated with assets held for sale and discontinued operations |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsExplanatory |
| 355 |
Consolidated statement of cash flows |
Concept (Text Block (HTML)) |
For Period |
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gsm:DescriptionOfAccountingPolicyForConsolidatedStatementOfCashFlowPolicyTextBlock |
| 356 |
30201 - Disclosure - Organization and Subsidiaries (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOrganizationAndSubsidiariesTables |
| 357 |
Implied Table |
Table |
* |
* |
implied:Table |
| 358 |
Disclosure Of Organization and Subsidiaries [Abstract] |
Abstract |
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|
gsm:DisclosureOfOrganizationAndSubsidiariesAbstract |
| 359 |
Schedule of subsidiaries by business activity |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfInterestsInSubsidiariesExplanatory |
| 360 |
30403 - Disclosure - Accounting policies (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureAccountingPoliciesTables |
| 361 |
Implied Table |
Table |
* |
* |
implied:Table |
| 362 |
Disclosure of initial application of standards or interpretations [abstract] |
Abstract |
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ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsAbstract |
| 363 |
Schedule of useful lives of property, plant and equipment |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfUsefulLivesPropertyPlantAndEquipmentTableTextBlock |
| 364 |
30503 - Disclosure - Business Combinations (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureBusinessCombinationsTables |
| 365 |
Implied Table |
Table |
* |
* |
implied:Table |
| 366 |
Disclosure of detailed information about business combination [abstract] |
Abstract |
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|
ifrs-full:DisclosureOfBusinessCombinationsAbstract |
| 367 |
Reconciliation of the final fair value of assets acquired and liabilities assumed to the value of the Acquisition Consideration |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfDetailedInformationAboutBusinessCombinationsExplanatory |
| 368 |
30603 - Disclosure - Segment reporting (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureSegmentReportingTables |
| 369 |
Implied Table |
Table |
* |
* |
implied:Table |
| 370 |
Disclosure of operating segments [abstract] |
Abstract |
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|
ifrs-full:DisclosureOfOperatingSegmentsAbstract |
| 371 |
Schedule of consolidated statements of income and financial position by reportable segment |
Concept (Text Block (HTML)) |
For Period |
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gsm:IfrsScheduleOfSegmentReportingInformationBySegmentTableTextBlock |
| 372 |
Schedule of sales by product line |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfProductsAndServicesExplanatory |
| 373 |
30703 - Disclosure - Goodwill (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureGoodwillTables |
| 374 |
Implied Table |
Table |
* |
* |
implied:Table |
| 375 |
Disclosure of reconciliation of changes in goodwill [abstract] |
Abstract |
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ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillAbstract |
| 376 |
Schedule of changes in the carrying amount of goodwill |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillExplanatory |
| 377 |
Schedule of key assumptions used in the determination of recoverable value |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfAssumptionsUsedInDeterminationOfRecoverableValueOfBusinessAcquisitionsTableTextBlock |
| 378 |
Schedule of sensitivity to changes in assumptions affecting impairment |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfSensitivityToChangesInAssumptionsUsedToDetermineImpairmentTableTextBlock |
| 379 |
30803 - Disclosure - Other intangible assets (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherIntangibleAssetsTables |
| 380 |
Implied Table |
Table |
* |
* |
implied:Table |
| 381 |
Disclosure of detailed information about intangible assets [abstract] |
Abstract |
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|
ifrs-full:DisclosureOfIntangibleAssetsAbstract |
| 382 |
Schedule of changes in the carrying amount of other intangible assets |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfIntangibleAssetsMaterialToEntityExplanatory |
| 383 |
30903 - Disclosure - Property, plant and equipment (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosurePropertyPlantAndEquipmentTables |
| 384 |
Implied Table |
Table |
* |
* |
implied:Table |
| 385 |
Disclosure of detailed information about property, plant and equipment [abstract] |
Abstract |
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|
ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract |
| 386 |
Schedule of property, plant and equipment, net of related accumulated depreciation and impairment |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory |
| 387 |
Summary of finance leases held by the Company included in Plant and Machinery |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeExplanatory |
| 388 |
31003 - Disclosure - Financial assets and other receivables (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFinancialAssetsAndOtherReceivablesTables |
| 389 |
Implied Table |
Table |
* |
* |
implied:Table |
| 390 |
Other financial assets |
Abstract |
|
|
ifrs-full:DisclosureOfFinancialAssetsAbstract |
| 391 |
Schedule of classification financial assets |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfClassificationOfFinancialAssetsTextBlock |
| 392 |
Schedule of other financial assets |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfCurrentAndNoncurrentFinancialAssetsTableTextBlock |
| 393 |
Schedule of main characteristics of senior subordinated and junior subordinated loans |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfSeniorSubordinatedAndJuniorSubordinatedLoansTableTextBlock |
| 394 |
Schedule of trade and other receivables |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory |
| 395 |
Schedule of changes in impairment losses |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossExplanatory |
| 396 |
31103 - Disclosure - Inventories (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureInventoriesTables |
| 397 |
Implied Table |
Table |
* |
* |
implied:Table |
| 398 |
Inventories. |
Abstract |
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ifrs-full:ClassesOfInventoriesAbstract |
| 399 |
Schedule of Inventory |
Concept (Text Block (HTML)) |
For Period |
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gsm:IfrsScheduleOfInventoryCurrentTableTextBlock |
| 400 |
31203 - Disclosure - Other assets (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherAssetsTables |
| 401 |
Implied Table |
Table |
* |
* |
implied:Table |
| 402 |
Other assets abstract |
Abstract |
|
|
gsm:OtherAssetAbstract |
| 403 |
Schedule of other non current and current assets |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfOtherAssetsExplanatory |
| 404 |
31303 - Disclosure - Equity (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureEquityTables |
| 405 |
Implied Table |
Table |
* |
* |
implied:Table |
| 406 |
Equity [abstract] |
Abstract |
|
|
ifrs-full:EquityAbstract |
| 407 |
Summary of majority shareholders |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfMajorityShareholdersTableTextBlock |
| 408 |
The disclosure of valuation adjustments. |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfValuationAdjustmentsTableTextBlock |
| 409 |
Schedule of net financial debt |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfCapitalStructureNetFinancialDebtTableTextBlock |
| 410 |
Summary of gross financial debt |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfGrossFinancialDebtDistributionTableTextBlock |
| 411 |
Schedule of changes in non-controlling interests |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfNonControllingInterestChangesExplanatoryTableTextBlock |
| 412 |
Summary of financial information for non-controlling interests |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfNonControllingInterestFinancialInformationExplanatoryTableTextBlock |
| 413 |
31403 - Disclosure - Earnings (loss) per ordinary share (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureEarningsLossPerOrdinaryShareTables |
| 414 |
Implied Table |
Table |
* |
* |
implied:Table |
| 415 |
Earnings per share [abstract] |
Abstract |
|
|
ifrs-full:EarningsPerShareAbstract |
| 416 |
Schedule of earnings (loss) per share calculation |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:EarningsPerShareExplanatory |
| 417 |
31503 - Disclosure - Provisions - (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureProvisionsTables |
| 418 |
Disclosure of other provisions [table] |
Table |
* |
* |
ifrs-full:DisclosureOfOtherProvisionsTable |
| 419 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 420 |
Geographical areas [member] |
Member |
|
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ifrs-full:GeographicalAreasMember |
| 421 |
France |
Member |
|
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country:FR |
| 422 |
South Africa |
Member |
|
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country:ZA |
| 423 |
Venezuela |
Member |
|
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country:VE |
| 424 |
North America |
Member |
|
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srt:NorthAmericaMember |
| 425 |
Disclosure of other provisions [line items] |
LineItems |
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ifrs-full:DisclosureOfOtherProvisionsLineItems |
| 426 |
Schedule showing breakdown of non-current and current provisions |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureShowingBreakdownOfNonCurrentAndCurrentProvisionsTableTextBlock |
| 427 |
Schedule of changes in provisions |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureShowingChangesInProvisionsTableTextBlock |
| 428 |
Schedule showing changes in obligation |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory |
| 429 |
Schedule of estimated future benefit payments |
Concept (Text Block (HTML)) |
For Period |
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gsm:DefinedBenefitPlanEstimatedFutureBenefitPaymentsTableTextBlock |
| 430 |
Schedule of breakdown in percentage of plan assets |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureShowingPercentageBreakdownOfPlanAssetsTableTextBlock |
| 431 |
Schedule showing fair value rollforward of plan assets |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfFairValueOfPlanAssetsExplanatory |
| 432 |
Summary of the main actuarial assumptions used to calculate obligations |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsExplanatory |
| 433 |
Schedule showing reconciliation of benefit obligations, plan assets and funded status |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfBenefitObligationsAndFundedStatusTableTextBlock |
| 434 |
31603 - Disclosure - Bank borrowings - (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureBankBorrowingsTables |
| 435 |
Implied Table |
Table |
* |
* |
implied:Table |
| 436 |
Disclosure of detailed information about borrowings [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsAbstract |
| 437 |
Schedule of non-current and current bank borrowings |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory |
| 438 |
Disclosure of Credit facilities Table Text Block |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfCreditFacilitiesTableTextBlock |
| 439 |
Schedule of non-current and current bank borrowings by currency |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfDetailedInformationAboutBorrowingsByCurrencyTableTextBlock |
| 440 |
Schedule of non-current bank borrowings by maturity |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfDetailedInformationAboutNoncurrentBorrowingsByMaturityTableTextBlock |
| 441 |
31703 - Disclosure - Leases (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureLeasesTables |
| 442 |
Implied Table |
Table |
* |
* |
implied:Table |
| 443 |
Disclosure of finance lease and operating lease by lessee [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeAbstract |
| 444 |
Schedule of non-current and current obligations under finance leases |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfObligationsUnderFinanceLeasesTableTextBlock |
| 445 |
Schedule of non-current payment obligations under finance leases by maturity |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureByMaturityOfNonCurrentFinanceLeasePaymentObligationsTableTextBlock |
| 446 |
Schedule of minimum lease payments under finance lease |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfMinimumFinanceLeasePaymentsTableTextBlock |
| 447 |
Schedule of minimum lease payments on operating leases by maturity |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfMinimumOperatingLeasePaymentsTableTextBlock |
| 448 |
31803 - Disclosure - Debt instruments (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureDebtInstrumentsTables |
| 449 |
Implied Table |
Table |
* |
* |
implied:Table |
| 450 |
Disclosure of detailed information about borrowings [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsAbstract |
| 451 |
Schedule of debt instruments |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfDetailedInformationAboutDebtInstrumentsTextBlock |
| 452 |
31903 - Disclosure - Other financial liabilities (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherFinancialLiabilitiesTables |
| 453 |
Implied Table |
Table |
* |
* |
implied:Table |
| 454 |
Disclosure of financial liabilities [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfFinancialLiabilitiesAbstract |
| 455 |
Schedule of other financial liabilities |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfOtherFinancialLiabilitiesTableTextBlock |
| 456 |
Schedule of Derivative financial instruments |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfDerivativeFinancialInstrumentsExplanatory |
| 457 |
Schedule of interest rate swaps |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfOutstandingInterestRateSwapsTableTextBlock |
| 458 |
32003 - Disclosure - Trade and other payables (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureTradeAndOtherPayablesTables |
| 459 |
Implied Table |
Table |
* |
* |
implied:Table |
| 460 |
Trade and other payables. |
Abstract |
|
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ifrs-full:TradeAndOtherPayablesAbstract |
| 461 |
Schedule of trade and other payables |
Concept (Text Block (HTML)) |
For Period |
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gsm:ScheduleOfTradeAndOtherPayablesTableTextBlock |
| 462 |
32103 - Disclosure - Other liabilities (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherLiabilitiesTables |
| 463 |
Disclosure of detailed information about business combination [table] |
Table |
* |
* |
ifrs-full:DisclosureOfBusinessCombinationsTable |
| 464 |
Business combinations [axis] |
Axis |
|
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ifrs-full:BusinessCombinationsAxis |
| 465 |
Entity's total for business combinations [member] |
Member |
|
|
ifrs-full:EntitysTotalForBusinessCombinationsMember |
| 466 |
Globe Specialty Metals, Inc. |
Member |
|
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gsm:GlobeSpecialtyMetalsInc.Member |
| 467 |
Statement [Line Items] |
LineItems |
|
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us-gaap:StatementLineItems |
| 468 |
Schedule of other liabilities |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfOtherLiabilitiesTableTextBlock |
| 469 |
Schedule of tax payables |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfTaxPayablesTableTextBlock |
| 470 |
Schedule of share based payment arrangements |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfSharebasedPaymentArrangementsExplanatory |
| 471 |
Schedule of performance condition of share options granted |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfPerformanceConditionsOfShareOptionsGrantedTableTextBlock |
| 472 |
Schedule of assumptions used to estimate the fair value of Ferroglobe stock option |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfAssumptionsUsedForEstimationOfFairValueOfStockOptionsTableTextBlock |
| 473 |
Schedule of summary of options outstanding |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsExplanatory |
| 474 |
32203 - Disclosure - Tax matters (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureTaxMattersTables |
| 475 |
Implied Table |
Table |
* |
* |
implied:Table |
| 476 |
Tax matters |
Abstract |
|
|
ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract |
| 477 |
Schedule of income taxes |
Concept (Text Block (HTML)) |
For Period |
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gsm:IfrsScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock |
| 478 |
Schedule of statutory income tax rate |
Concept (Text Block (HTML)) |
For Period |
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gsm:IfrsScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock |
| 479 |
Schedule of current tax assets and liabilities |
Concept (Text Block (HTML)) |
For Period |
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gsm:ScheduleOfCurrentTaxAssetsAndLiabilitiesTableTextBlock |
| 480 |
Schedule of changes in deferred tax assets and liabilities |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfDeferredTaxesExplanatory |
| 481 |
Schedule of unrecognised deductible temporary differences, unused tax losses and unused tax credits |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory |
| 482 |
32303 - Disclosure - Related party transactions and balances (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureRelatedPartyTransactionsAndBalancesTables |
| 483 |
Implied Table |
Table |
* |
* |
implied:Table |
| 484 |
Related party transactions and balances |
Abstract |
|
|
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract |
| 485 |
Schedule of balances with related parties |
Concept (Text Block (HTML)) |
For Period |
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gsm:ScheduleOfBalancesWithRelatedPartiesTableTextBlock |
| 486 |
Schedule of transactions with related parties and other related parties |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory |
| 487 |
32503 - Disclosure - Income and expenses (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureIncomeAndExpensesTables |
| 488 |
Implied Table |
Table |
* |
* |
implied:Table |
| 489 |
Income and expenses |
Abstract |
|
|
ifrs-full:AnalysisOfIncomeAndExpenseAbstract |
| 490 |
Sales by segment |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfOperatingSegmentsExplanatory |
| 491 |
Sales by geographical area |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfGeographicalAreasExplanatory |
| 492 |
Schedule of staff costs |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfEmployeeBenefitsExplanatory |
| 493 |
Schedule of depreciation and amortization charges, operating allowances and write-downs |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfDepreciationAndAmortisationExpenseExplanatory |
| 494 |
Schedule of finance income |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfFinanceIncomeExplanatory |
| 495 |
Schedule of finance costs |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfFinanceCostExplanatory |
| 496 |
Schedule of changes in impairment losses |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfInformationForEachMaterialImpairmentLossRecognisedOrReversedForIndividualAssetOrCashgeneratingUnitExplanatory |
| 497 |
Schedule of (loss) gain on disposal of non-current assets |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfGainLossOnDisposalOfNonCurrentAssetsTableTextBlock |
| 498 |
32603 - Disclosure - Remuneration of key management personnel (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureRemunerationOfKeyManagementPersonnelTables |
| 499 |
Implied Table |
Table |
* |
* |
implied:Table |
| 500 |
Remuneration of key management personnel |
Abstract |
|
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gsm:DisclosureOfRemunerationAndOtherBenefitsPaidToKeyManagementPersonnelAbstract |
| 501 |
Schedule of remuneration of key management personal |
Concept (Text Block (HTML)) |
For Period |
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ifrs-full:DisclosureOfInformationAboutKeyManagementPersonnelExplanatory |
| 502 |
32703 - Disclosure - Financial risk management (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFinancialRiskManagementTables |
| 503 |
Implied Table |
Table |
* |
* |
implied:Table |
| 504 |
Financial risk management |
Abstract |
|
|
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsAbstract |
| 505 |
Schedule of interest bearing financial liabilities |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfInterestBearingFinancialLiabilitiesTableTextBlock |
| 506 |
Schedule of undiscounted cash flow maturities |
Concept (Text Block (HTML)) |
For Period |
|
gsm:DisclosureOfMaturityOfUndiscountedCashFlowsOfFinancialInstrumentsTableTextBlock |
| 507 |
Schedule of gross inflows and outflows by instrument maturity |
Concept (Text Block (HTML)) |
For Period |
|
gsm:DisclosureOfGrossInflowsAndOutflowsMaturityTableTextBlock |
| 508 |
Schedule of changes in liabilities arising from financing activities |
Concept (Text Block (HTML)) |
For Period |
|
ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesExplanatory |
| 509 |
32803 - Disclosure - Fair value measurement (Tables) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFairValueMeasurementTables |
| 510 |
Implied Table |
Table |
* |
* |
implied:Table |
| 511 |
Disclosure of financial liabilities [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfFinancialLiabilitiesAbstract |
| 512 |
Schedule of assets and liabilities measured at fair value |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesTableTextBlock |
| 513 |
Schedule of changes fair value of biological assets classified at level 3 in the hierarchy |
Concept (Text Block (HTML)) |
For Period |
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gsm:DisclosureOfChangesFairValueOfBiologicalAssetsClassifiedAtLevel3InHierarchyTableTextBlock |
| 514 |
40201 - Disclosure - Organization and Subsidiaries - Percentage of ownership (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOrganizationAndSubsidiariesPercentageOfOwnershipDetails |
| 515 |
Disclosure of subsidiaries [table] |
Table |
* |
* |
ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable |
| 516 |
Subsidiaries [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInSubsidiariesAxis |
| 517 |
Entity's total for subsidiaries [member] |
Member |
|
|
ifrs-full:EntitysTotalForSubsidiariesMember |
| 518 |
Alabama Sand and Gravel, Inc |
Member |
|
|
gsm:AlabamaSandAndGravelIncMember |
| 519 |
Alden Resources, LLC |
Member |
|
|
gsm:AldenResourcesLlcMember |
| 520 |
Alden Sales Corporation, LLC |
Member |
|
|
gsm:AldenSalesCorporationLlcMember |
| 521 |
ARL Resources, LLC |
Member |
|
|
gsm:ArlResourcesLlcMember |
| 522 |
ARL Services, LLC |
Member |
|
|
gsm:ArlServicesLlcMember |
| 523 |
Core Metals Group Holdings, LLC |
Member |
|
|
gsm:CoreMetalsGroupHoldingsLlcMember |
| 524 |
Core Metals Group, LLC |
Member |
|
|
gsm:CoreMetalsGroupLlcMember |
| 525 |
Gatliff Services, LLC |
Member |
|
|
gsm:GatliffServicesLlcMember |
| 526 |
GBG Holdings, LLC |
Member |
|
|
gsm:GbgHoldingsLlcMember |
| 527 |
Globe Metallurgical Inc. |
Member |
|
|
gsm:GlobeMetallurgicalInc.Member |
| 528 |
Globe Metals Enterprises, Inc. |
Member |
|
|
gsm:GlobeMetalsEnterprisesInc.Member |
| 529 |
GSM Alloys I, Inc. |
Member |
|
|
gsm:GsmAlloysIInc.Member |
| 530 |
GSM Alloys II, Inc. |
Member |
|
|
gsm:GsmAlloysIiInc.Member |
| 531 |
GSM Enterprises Holdings, Inc. |
Member |
|
|
gsm:GsmEnterprisesHoldingsInc.Member |
| 532 |
GSM Enterprises, LLC |
Member |
|
|
gsm:GsmEnterprisesLlcMember |
| 533 |
GSM Sales, Inc. |
Member |
|
|
gsm:GsmSalesInc.Member |
| 534 |
LF Resources, Inc. |
Member |
|
|
gsm:LfResourcesInc.Member |
| 535 |
Metallurgical Process Materials, LLC |
Member |
|
|
gsm:MetallurgicalProcessMaterialsLlcMember |
| 536 |
Norchem, Inc. |
Member |
|
|
gsm:NorchemInc.Member |
| 537 |
QSIP Canada ULC |
Member |
|
|
gsm:QsipCanadaUlcMember |
| 538 |
Quebec Silicon General Partner |
Member |
|
|
gsm:QuebecSiliconGeneralPartnerMember |
| 539 |
Quebec Silicon LP |
Member |
|
|
gsm:QuebecSiliconLpMember |
| 540 |
Tennessee Alloys Company, LLC |
Member |
|
|
gsm:TennesseeAlloysCompanyLlcMember |
| 541 |
West Virginia Alloys, Inc. |
Member |
|
|
gsm:WestVirginiaAlloysInc.Member |
| 542 |
WVA Manufacturing, LLC |
Member |
|
|
gsm:WvaManufacturingLlcMember |
| 543 |
Cuarzos Industriales, S.A.U. |
Member |
|
|
gsm:CuarzosIndustrialesS.a.u.Member |
| 544 |
FerroAtlántica Canada Company Ltd |
Member |
|
|
gsm:FerroatlnticaCanadaCompanyLtdMember |
| 545 |
Ferroatlántica del Cinca, S.L. |
Member |
|
|
gsm:FerroatlnticaDelCincaS.l.Member |
| 546 |
Ferroglobe Mangan Norge AS |
Member |
|
|
gsm:FerroglobeManganNorgeAsMember |
| 547 |
Ferroglobe Manganese France SAS |
Member |
|
|
gsm:FerroglobeManganeseFranceSasMember |
| 548 |
Ferroatlántica, S.A.U. - Electrometallurgy |
Member |
|
|
gsm:FerroatlanticaS.a.u.ElectrometallurgyMember |
| 549 |
FerroPem, S.A.S. |
Member |
|
|
gsm:FerropemS.a.s.Member |
| 550 |
Grupo FerroAtlantica, S.A.U |
Member |
|
|
gsm:GrupoFerroatlanticaS.a.uMember |
| 551 |
Islenska Kisilfelagio EHF (Icelandic Silicon Corp.) |
Member |
|
|
gsm:IslenskaKisilfelagioEhfIcelandicSiliconCorp.Member |
| 552 |
Kintuck (France) SAS |
Member |
|
|
gsm:KintuckFranceSasMember |
| 553 |
Kintuck AS |
Member |
|
|
gsm:KintuckAsMember |
| 554 |
Rocas, Arcillas y Minerales, S.A. |
Member |
|
|
gsm:RocasArcillasYMineralesS.a.Member |
| 555 |
Rebone Mining (Pty.), Ltd. |
Member |
|
|
gsm:ReboneMiningPty.Ltd.Member |
| 556 |
Silicon Smelters (Pty.), Ltd. |
Member |
|
|
gsm:SiliconSmeltersPty.Ltd.Member |
| 557 |
Silicon Technology (Pty.), Ltd. |
Member |
|
|
gsm:SiliconTechnologyPty.Ltd.Member |
| 558 |
Thaba Chueu Mining (Pty.), Ltd. |
Member |
|
|
gsm:ThabaChueuMiningPty.Ltd.Member |
| 559 |
16 Front Street, LLC |
Member |
|
|
gsm:FrontStreetLlcMember |
| 560 |
Cuarzos Industriales de Venezuela (Cuarzoven), S.A. |
Member |
|
|
gsm:CuarzosIndustrialesDeVenezuelaCuarzovenS.a.Member |
| 561 |
Ferroatlantica de Venezuela (FerroVen), S.A. |
Member |
|
|
gsm:FerroatlanticaDeVenezuelaFerrovenS.a.Member |
| 562 |
Actifs Solaires Becancour, Inc |
Member |
|
|
gsm:ActifsSolairesBecancourIncMember |
| 563 |
Emix, S.A.S. |
Member |
|
|
gsm:EmixS.a.s.Member |
| 564 |
ECPI, Inc. |
Member |
|
|
gsm:EcpiInc.Member |
| 565 |
Ferroatlantica Brasil Mineracao Ltda. |
Member |
|
|
gsm:FerroatlanticaBrasilMineracaoLtda.Member |
| 566 |
Ferroatlantica de Mexico, S.A. de C.V. |
Member |
|
|
gsm:FerroatlanticaDeMexicoS.a.DeC.v.Member |
| 567 |
Ferroatlantica Deutschland, GmbH |
Member |
|
|
gsm:FerroatlanticaDeutschlandGmbhMember |
| 568 |
Ferroatlantica I+D, S.L.U. |
Member |
|
|
gsm:FerroatlanticaIDS.l.u.Member |
| 569 |
FerroAtlantica India Private Limited |
Member |
|
|
gsm:FerroatlanticaIndiaPrivateLimitedMember |
| 570 |
Ferroatlantica y Cia., F. de Ferroaleac. y Metales, S.C. |
Member |
|
|
gsm:FerroatlanticaYCia.F.DeFerroaleac.YMetalesS.c.Member |
| 571 |
Ferroatlantica, S.A.U. - Other segments - Energy |
Member |
|
|
gsm:FerroatlanticaS.a.u.OtherSegmentsEnergyMember |
| 572 |
FerroAtlantica International Ltd |
Member |
|
|
gsm:FerroatlanticaInternationalLtdMember |
| 573 |
Ferroglobe Services (UK) PLC |
Member |
|
|
gsm:FerroglobeServicesUkPlcMember |
| 574 |
FerroManganese Mauritania SARL |
Member |
|
|
gsm:FerromanganeseMauritaniaSarlMember |
| 575 |
Ferroquartz Company Ltd |
Member |
|
|
gsm:FerroquartzCompanyLtdMember |
| 576 |
Ferroquartz Holdings, Ltd (Hong Kong) |
Member |
|
|
gsm:FerroquartzHoldingsLtdHongKongMember |
| 577 |
FerroQuartz Mauritania SARL |
Member |
|
|
gsm:FerroquartzMauritaniaSarlMember |
| 578 |
FerroQuebec, Inc. |
Member |
|
|
gsm:FerroquebecInc.Member |
| 579 |
FerroTambao, SARL |
Member |
|
|
gsm:FerrotambaoSarlMember |
| 580 |
Ferrosolar OPCO Group SL. |
Member |
|
|
gsm:FerrosolarOpcoGroupSl.Member |
| 581 |
Ferrosolar R&D SL. |
Member |
|
|
gsm:FerrosolarRDSl.Member |
| 582 |
Ganzi Ferroatlantica Silicon Industry Company Ltd |
Member |
|
|
gsm:GanziFerroatlanticaSiliconIndustryCompanyLtdMember |
| 583 |
GBG Financial LLC |
Member |
|
|
gsm:GbgFinancialLlcMember |
| 584 |
Globe Argentina Holdco, LLC |
Member |
|
|
gsm:GlobeArgentinaHoldcoLlcMember |
| 585 |
Globe BG, LLC |
Member |
|
|
gsm:GlobeBgLlcMember |
| 586 |
Globe LSE, Inc. |
Member |
|
|
gsm:GlobeLseInc.Member |
| 587 |
Globe Metales S.R.L. |
Member |
|
|
gsm:GlobeMetalesS.r.l.Member |
| 588 |
Globe Metallurgical Carbon, LLC |
Member |
|
|
gsm:GlobeMetallurgicalCarbonLlcMember |
| 589 |
Globe Specialty Metals, Inc. |
Member |
|
|
gsm:GlobeSpecialtyMetalsInc.Member |
| 590 |
GSM Financial, Inc. |
Member |
|
|
gsm:GsmFinancialInc.Member |
| 591 |
GSM Netherlands, BV |
Member |
|
|
gsm:GsmNetherlandsBvMember |
| 592 |
Laurel Ford Resources, Inc. |
Member |
|
|
gsm:LaurelFordResourcesInc.Member |
| 593 |
MST Financial Holdings, LLC |
Member |
|
|
gsm:MstFinancialHoldingsLlcMember |
| 594 |
MST Financial, LLC |
Member |
|
|
gsm:MstFinancialLlcMember |
| 595 |
MST Resources, LLC |
Member |
|
|
gsm:MstResourcesLlcMember |
| 596 |
Ningxia Yonvey Coal Industrial Co., Ltd. |
Member |
|
|
gsm:NingxiaYonveyCoalIndustrialCo.Ltd.Member |
| 597 |
Photosil Industries, SAS |
Member |
|
|
gsm:PhotosilIndustriesSasMember |
| 598 |
Silicio Ferrosolar, SLU |
Member |
|
|
gsm:SilicioFerrosolarSluMember |
| 599 |
Solsil, Inc. |
Member |
|
|
gsm:SolsilInc.Member |
| 600 |
Ultra Core Polska (UCP) |
Member |
|
|
gsm:UltraCorePolskaUcpMember |
| 601 |
Ultracore Energy SA |
Member |
|
|
gsm:UltracoreEnergySaMember |
| 602 |
Mangshi FerroAtlantica Mining Industry Service CompanyLtd |
Member |
|
|
gsm:MangshiFerroatlanticaMiningIndustryServiceCompanyltdMember |
| 603 |
MangShi Sinice Silicon Industry Company Limited |
Member |
|
|
gsm:MangshiSiniceSiliconIndustryCompanyLimitedMember |
| 604 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 605 |
Segments [member] |
Member |
|
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ifrs-full:SegmentsMember |
| 606 |
Electrometallurgy - North America |
Member |
|
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gsm:ElectrometallurgyNorthAmericaSegmentMember |
| 607 |
Electrometallurgy - Europe |
Member |
|
|
gsm:ElectrometallurgyEuropeSegmentMember |
| 608 |
Electrometallurgy - South Africa |
Member |
|
|
gsm:ElectrometallurgySouthAfricaSegmentMember |
| 609 |
Other segments |
Member |
|
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ifrs-full:AllOtherSegmentsMember |
| 610 |
Disclosure of subsidiaries [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems |
| 611 |
Proportion of ownership interest in subsidiary - Direct |
Concept (Pure) |
For Period |
|
gsm:ProportionOfDirectOwnershipInterestInSubsidiary |
| 612 |
Proportion of ownership interest in subsidiary |
Concept (Percent) |
For Period |
|
ifrs-full:ProportionOfOwnershipInterestInSubsidiary |
| 613 |
40301 - Disclosure - Basis of Presentation and Basis of Consolidation (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureBasisOfPresentationAndBasisOfConsolidationDetails |
| 614 |
DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable |
Table |
* |
* |
ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable |
| 615 |
Borrowings by name [axis] |
Axis |
|
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ifrs-full:BorrowingsByNameAxis |
| 616 |
Borrowings by name [member] |
Member |
|
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ifrs-full:BorrowingsByNameMember |
| 617 |
Senior Notes due 2022 |
Member |
|
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gsm:SeniorNotesDue2022Member |
| 618 |
Categories of related parties [axis] |
Axis |
|
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ifrs-full:CategoriesOfRelatedPartiesAxis |
| 619 |
Entity's total for related parties [member] |
Member |
|
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ifrs-full:EntitysTotalForRelatedPartiesMember |
| 620 |
Grupo Villar Mir, S.A.U. |
Member |
|
|
gsm:GrupoVillarMirS.a.u.Member |
| 621 |
New IFRSs [axis] |
Axis |
|
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ifrs-full:NewIFRSsAxis |
| 622 |
New IFRSs [member] |
Member |
|
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ifrs-full:NewIFRSsMember |
| 623 |
IFRS 16 |
Member |
|
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gsm:IncreaseDecreaseDueToApplicationOfIfrs16Member |
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DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems |
LineItems |
|
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ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems |
| 625 |
Lease liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LeaseLiabilities |
| 626 |
Amount of expected decrease in other operating expenses |
Concept (Monetary) |
For Period |
Credit |
gsm:OperatingLeaseExpectedDecreaseOtherOperatingExpenses |
| 627 |
Amount of expected increase in depreciation expense |
Concept (Monetary) |
For Period |
Debit |
gsm:OperatingLeasesExpectedAmountIncreaseInDepreciationExpense |
| 628 |
Amount of expected increase in finance costs |
Concept (Monetary) |
For Period |
Debit |
gsm:OperatingLeasesExpectedAmountIncreaseInFinanceCosts |
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Principal amount |
Concept (Monetary) |
As Of |
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ifrs-full:NotionalAmount |
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Fixed Interest Rate |
Concept (Percent) |
As Of |
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ifrs-full:BorrowingsInterestRate |
| 631 |
Redemption price of notes at change of control |
Concept (Percent) |
For Period |
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| 632 |
Percentage Of Outstanding Shares Owned |
Concept (Percent) |
For Period |
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gsm:PercentageOfOutstandingSharesOwned |
| 633 |
Ownership interest as a percentage |
Concept (Percent) |
For Period |
|
gsm:PercentageOfOwnershipInterestHeldByRelatedParty |
| 634 |
40401 - Disclosure - Accounting policies (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureAccountingPoliciesDetails |
| 635 |
Disclosure of initial application of standards or interpretations [table] |
Table |
* |
* |
ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsTable |
| 636 |
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Axis |
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| 637 |
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Member |
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ifrs-full:PropertyPlantAndEquipmentMember |
| 638 |
Properties for own use |
Member |
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gsm:PropertiesForOwnUseMember |
| 639 |
Plant and machinery |
Member |
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| 640 |
Tools |
Member |
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| 641 |
Furniture and fixtures |
Member |
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| 642 |
Computer hardware |
Member |
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| 643 |
Transport equipment |
Member |
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| 644 |
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Axis |
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ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis |
| 645 |
Intangible assets other than goodwill [member] |
Member |
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| 646 |
Capitalised development expenditure |
Member |
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| 647 |
Rights of use |
Member |
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gsm:IFRSContractualRightsMember |
| 648 |
Computer software |
Member |
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| 649 |
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Axis |
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ifrs-full:RangeAxis |
| 650 |
Ranges [member] |
Member |
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ifrs-full:RangesMember |
| 651 |
Maximum |
Member |
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Minimum |
Member |
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ifrs-full:BottomOfRangeMember |
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Disclosure of initial application of standards or interpretations [line items] |
LineItems |
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| 654 |
Disclosure of intangible assets material to entity [abstract] |
Abstract |
|
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ifrs-full:DisclosureOfIntangibleAssetsMaterialToEntityAbstract |
| 655 |
Amortisation period of intangible assets |
Concept (xbrli:durationItemType) |
For Period |
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gsm:AmortisationPeriodOfIntangibleAssetsMaterialToEntity |
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Useful lives |
Abstract |
|
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Concept (xbrli:durationItemType) |
For Period |
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Years of Estimated Useful Life |
Concept (xbrli:durationItemType) |
For Period |
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gsm:IfrsPropertyPlantAndEquipmentEstimatedUsefulLives |
| 659 |
40501 - Disclosure - Business Combinations - Total acquisition consideration (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureBusinessCombinationsTotalAcquisitionConsiderationDetails |
| 660 |
Disclosure of detailed information about business combination [table] |
Table |
* |
* |
ifrs-full:DisclosureOfBusinessCombinationsTable |
| 661 |
Business combinations [axis] |
Axis |
|
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ifrs-full:BusinessCombinationsAxis |
| 662 |
Entity's total for business combinations [member] |
Member |
|
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ifrs-full:EntitysTotalForBusinessCombinationsMember |
| 663 |
Globe Specialty Metals Inc |
Member |
|
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| 664 |
Glencore |
Member |
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| 665 |
Non-adjusting events after reporting period [axis] |
Axis |
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| 666 |
Non-adjusting events after reporting period [member] |
Member |
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| 667 |
Major business combination |
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ifrs-full:MajorBusinessCombinationMember |
| 668 |
Disclosure of detailed information about business combination [line items] |
LineItems |
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ifrs-full:DisclosureOfBusinessCombinationsLineItems |
| 669 |
Acquisition-date fair value of total consideration transferred [abstract] |
Abstract |
|
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ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferredAbstract |
| 670 |
Percentage of equity interests acquired |
Concept (Percent) |
As Of |
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ifrs-full:PercentageOfVotingEquityInterestsAcquired |
| 671 |
Period for marketing and procurement of manganese ores |
Concept (xbrli:durationItemType) |
For Period |
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gsm:PeriodForMarketingAndProcurementOfManganeseOresToSupplyPlant |
| 672 |
40502 - Disclosure - Business Combinations - Kintuk (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureBusinessCombinationsKintukDetails |
| 673 |
Disclosure of detailed information about business combination [table] |
Table |
* |
* |
ifrs-full:DisclosureOfBusinessCombinationsTable |
| 674 |
Business combinations [axis] |
Axis |
|
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ifrs-full:BusinessCombinationsAxis |
| 675 |
Entity's total for business combinations [member] |
Member |
|
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ifrs-full:EntitysTotalForBusinessCombinationsMember |
| 676 |
Kintuk |
Member |
|
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gsm:KintukSasAndKintukAsMember |
| 677 |
Ferroglobe Mangan Norge And Ferroglobe Manganese France Member |
Member |
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| 678 |
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Axis |
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ifrs-full:RangeAxis |
| 679 |
Ranges [member] |
Member |
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| 680 |
Minimum |
Member |
|
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ifrs-full:BottomOfRangeMember |
| 681 |
Maximum |
Member |
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ifrs-full:TopOfRangeMember |
| 682 |
Disclosure of detailed information about business combination [line items] |
LineItems |
|
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ifrs-full:DisclosureOfBusinessCombinationsLineItems |
| 683 |
Percentage of equity interests acquired |
Concept (Percent) |
As Of |
|
ifrs-full:PercentageOfVotingEquityInterestsAcquired |
| 684 |
IFRS Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets [Abstract] |
Abstract |
|
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gsm:IFRSBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssetsAbstract |
| 685 |
Other intangible assets |
Concept (Monetary) |
As Of |
Debit |
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| 686 |
Property, plant and equipment |
Concept (Monetary) |
As Of |
Debit |
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| 687 |
Non-current financial assets |
Concept (Monetary) |
As Of |
Debit |
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| 688 |
Total non-current assets acquired |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentAssetsRecognisedAsOfAcquisitionDate |
| 689 |
IFRS Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets [Abstract] |
Abstract |
|
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gsm:IFRSBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsAbstract |
| 690 |
Inventories |
Concept (Monetary) |
As Of |
Debit |
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| 691 |
Trade and other receivables |
Concept (Monetary) |
As Of |
Debit |
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| 692 |
Other current assets |
Concept (Monetary) |
As Of |
Debit |
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| 693 |
Cash and cash equivalents |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate |
| 694 |
Total current liabilities assumed |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentAssetsRecognisedAsOfAcquisitionDate |
| 695 |
Total assets acquired |
Concept (Monetary) |
As Of |
Debit |
gsm:IFRSBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets |
| 696 |
IFRS Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities [Abstract] |
Abstract |
|
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gsm:IFRSBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesAbstract |
| 697 |
Deferred tax liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate |
| 698 |
Total non-current liabilities acquired |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate |
| 699 |
IFRS Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities [Abstract] |
Abstract |
|
|
gsm:IFRSBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAbstract |
| 700 |
Trade and other payables |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:TradeAndOtherPayablesRecognisedAsOfAcquisitionDate |
| 701 |
Provisions |
Concept (Monetary) |
As Of |
Credit |
gsm:ProvisionsRecognisedAsOfAcquisitionDateCurrent |
| 702 |
Current income tax liabilities |
Concept (Monetary) |
As Of |
Credit |
gsm:CurrentIncomeTaxLiabilitiesRecognisedAsOfAcquisitionDate |
| 703 |
Other current liabilities |
Concept (Monetary) |
As Of |
Credit |
gsm:IFRSBusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther |
| 704 |
Total current liabilities assumed |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentLiabilitiesRecognisedAsOfAcquisitionDate |
| 705 |
Total liabilities assumed |
Concept (Monetary) |
As Of |
Credit |
gsm:TotalLiabilitiesRecognisedAsOfAcquisitionDate |
| 706 |
Net assets acquired |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IdentifiableAssetsAcquiredLiabilitiesAssumed |
| 707 |
Satisfied by: |
Abstract |
|
|
ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferredAbstract |
| 708 |
Cash |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CashTransferred |
| 709 |
Contingent consideration |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilitiesIncurred |
| 710 |
Acquisition Consideration |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred |
| 711 |
Gain on bargain purchase |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainRecognisedInBargainPurchaseTransaction |
| 712 |
Less: cash and cash equivalent balances acquired |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate |
| 713 |
Net cash outflow arising on acquisition |
Concept (Monetary) |
As Of |
Credit |
gsm:NetCashOutflowOnBusinessCombination |
| 714 |
Fair value of trade receivables |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:FairValueOfAcquiredReceivables |
| 715 |
Gain loss relating to acquired receivables |
Concept (Monetary) |
For Period |
Credit |
gsm:GainLossRelatingToAcquiredReceivables |
| 716 |
Contingent consideration arrangements |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:ContingentConsiderationArrangementsAndIndemnificationAssetsRecognisedAsOfAcquisitionDate |
| 717 |
Period of contingent consideration applied to sales |
Concept (xbrli:durationItemType) |
For Period |
|
gsm:ContingentConsiderationThresholdPeriodOfSalesMadeFromDateOfAcquisition |
| 718 |
Discount rates |
Concept (Percent) |
For Period |
|
gsm:DiscountRateUsedInSignificantUnobservableInputs |
| 719 |
Average simulated revenues |
Concept (Monetary) |
For Period |
Credit |
gsm:AverageSimulatedRevenueUsedInSignificantUnobservableInputs |
| 720 |
Revenue of acquiree |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueOfAcquiree |
| 721 |
Loss of acquiree |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossOfAcquiree |
| 722 |
Revenue of combined entity |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueOfCombinedEntity |
| 723 |
profit of combined entity |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossOfCombinedEntity |
| 724 |
40601 - Disclosure - Segment reporting - Consolidated income statements (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureSegmentReportingConsolidatedIncomeStatementsDetails |
| 725 |
Disclosure of operating segments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfOperatingSegmentsTable |
| 726 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 727 |
Segments [member] |
Member |
|
|
ifrs-full:SegmentsMember |
| 728 |
Electrometallurgy - North America |
Member |
|
|
gsm:ElectrometallurgyNorthAmericaSegmentMember |
| 729 |
Electrometallurgy - Europe |
Member |
|
|
gsm:ElectrometallurgyEuropeSegmentMember |
| 730 |
Electrometallurgy - South Africa |
Member |
|
|
gsm:ElectrometallurgySouthAfricaSegmentMember |
| 731 |
Other segments |
Member |
|
|
ifrs-full:AllOtherSegmentsMember |
| 732 |
Segment consolidation items [axis] |
Axis |
|
|
ifrs-full:SegmentConsolidationItemsAxis |
| 733 |
Entity's total for segment consolidation items [member] |
Member |
|
|
ifrs-full:EntitysTotalForSegmentConsolidationItemsMember |
| 734 |
Eliminations |
Member |
|
|
ifrs-full:EliminationOfIntersegmentAmountsMember |
| 735 |
Disclosure of operating segments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfOperatingSegmentsLineItems |
| 736 |
Profit (loss) [abstract] |
Abstract |
|
|
ifrs-full:ProfitLossAbstract |
| 737 |
Sales |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromContractsWithCustomers |
| 738 |
Cost of sales |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CostOfSales |
| 739 |
Other operating income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherIncome |
| 740 |
Staff costs |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:EmployeeBenefitsExpense |
| 741 |
Other operating expense |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:OtherExpenseByNature |
| 742 |
Depreciation and amortization charges, operating allowances and write-downs |
Concept (Monetary) |
For Period |
Debit |
gsm:DepreciationAndAmortizationChargesOperatingAllowancesAndWriteDowns |
| 743 |
Impairment losses |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ImpairmentLossRecognisedInProfitOrLoss |
| 744 |
Net gain due to changes in the value of assets |
Concept (Monetary) |
For Period |
|
ifrs-full:GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssets |
| 745 |
(Loss) gain on disposal of non-current assets |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation |
| 746 |
Other (loss) gain |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherGainsLosses |
| 747 |
Operating profit (loss) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossFromOperatingActivities |
| 748 |
Finance income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:FinanceIncome |
| 749 |
Finance costs |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:FinanceCosts |
| 750 |
Financial derivative gain (loss) |
Concept (Monetary) |
For Period |
Credit |
gsm:GainLossOnFinancialDerivative |
| 751 |
Exchange differences |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss |
| 752 |
Profit (loss) before tax |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossBeforeTax |
| 753 |
Income tax (expense) benefit |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncomeTaxExpenseContinuingOperations |
| 754 |
Profit (loss) for the year |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLoss |
| 755 |
Loss (profit) attributable to non-controlling interests |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossAttributableToNoncontrollingInterests |
| 756 |
Profit (loss) attributable to the Parent |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossAttributableToOwnersOfParent |
| 757 |
40602 - Disclosure - Segment reporting - Consolidated statements of financial position (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureSegmentReportingConsolidatedStatementsOfFinancialPositionDetails |
| 758 |
Disclosure of operating segments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfOperatingSegmentsTable |
| 759 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 760 |
Segments [member] |
Member |
|
|
ifrs-full:SegmentsMember |
| 761 |
Electrometallurgy - North America |
Member |
|
|
gsm:ElectrometallurgyNorthAmericaSegmentMember |
| 762 |
Electrometallurgy - Europe |
Member |
|
|
gsm:ElectrometallurgyEuropeSegmentMember |
| 763 |
Electrometallurgy - South Africa |
Member |
|
|
gsm:ElectrometallurgySouthAfricaSegmentMember |
| 764 |
Other segments |
Member |
|
|
ifrs-full:AllOtherSegmentsMember |
| 765 |
Segment consolidation items [axis] |
Axis |
|
|
ifrs-full:SegmentConsolidationItemsAxis |
| 766 |
Entity's total for segment consolidation items [member] |
Member |
|
|
ifrs-full:EntitysTotalForSegmentConsolidationItemsMember |
| 767 |
Eliminations |
Member |
|
|
ifrs-full:EliminationOfIntersegmentAmountsMember |
| 768 |
Disclosure of operating segments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfOperatingSegmentsLineItems |
| 769 |
Assets [abstract] |
Abstract |
|
|
ifrs-full:AssetsAbstract |
| 770 |
Goodwill |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Goodwill |
| 771 |
Other intangible assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IntangibleAssetsOtherThanGoodwill |
| 772 |
Property, plant and equipment |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PropertyPlantAndEquipment |
| 773 |
Inventories |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InventoriesTotal |
| 774 |
Trade and other receivables |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:TradeAndOtherReceivables |
| 775 |
Cash and cash equivalents |
Concept (Monetary) |
As Of |
Debit |
gsm:CashAndCashEquivalentsFromContinuedOperations |
| 776 |
Other |
Concept (Monetary) |
As Of |
Debit |
gsm:OtherAssetsOther |
| 777 |
Total assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Assets |
| 778 |
Equity and liabilities [abstract] |
Abstract |
|
|
ifrs-full:EquityAndLiabilitiesAbstract |
| 779 |
Equity |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Equity |
| 780 |
Provisions |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Provisions |
| 781 |
Bank borrowings |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Borrowings |
| 782 |
Obligations under finance leases |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LeaseLiabilities |
| 783 |
Debt instruments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DebtSecurities |
| 784 |
Other financial liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherFinancialLiabilities |
| 785 |
Trade and other payables |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers |
| 786 |
Other |
Concept (Monetary) |
As Of |
Credit |
gsm:OtherLiabilitiesIncomeTaxLiabilitiesAndMiscellaneousLiabilities |
| 787 |
Total equity and liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:EquityAndLiabilities |
| 788 |
40603 - Disclosure - Segment reporting - Sales by product line (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureSegmentReportingSalesByProductLineDetails |
| 789 |
Disclosure of products and services [table] |
Table |
* |
* |
ifrs-full:DisclosureOfProductsAndServicesTable |
| 790 |
Products and services [axis] |
Axis |
|
|
ifrs-full:ProductsAndServicesAxis |
| 791 |
Products and services [member] |
Member |
|
|
ifrs-full:ProductsAndServicesMember |
| 792 |
Silicon Metal Product Line [Member] |
Member |
|
|
gsm:SiliconMetalProductLineMember |
| 793 |
Manganese Alloys Product Line [Member] |
Member |
|
|
gsm:ManganeseAlloysProductLineMember |
| 794 |
Ferrosilicon Product Line [Member] |
Member |
|
|
gsm:FerrosiliconProductLineMember |
| 795 |
Other Silicon Based Alloys Product Line [Member] |
Member |
|
|
gsm:OtherSiliconBasedAlloysProductLineMember |
| 796 |
Silica Fume Product Line [Member] |
Member |
|
|
gsm:SilicaFumeProductLineMember |
| 797 |
Energy Product Line [Member] |
Member |
|
|
gsm:EnergyProductLineMember |
| 798 |
Other Product Lines [Member] |
Member |
|
|
gsm:OtherProductLinesMember |
| 799 |
Disclosure of products and services [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfProductsAndServicesLineItems |
| 800 |
Disclosure of products and services [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfProductsAndServicesAbstract |
| 801 |
Sales |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromContractsWithCustomers |
| 802 |
40604 - Disclosure - Segment reporting - Major customers (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureSegmentReportingMajorCustomersDetails |
| 803 |
Disclosure of major customers [table] |
Table |
* |
* |
ifrs-full:DisclosureOfMajorCustomersTable |
| 804 |
Major customers [axis] |
Axis |
|
|
ifrs-full:MajorCustomersAxis |
| 805 |
Customers [member] |
Member |
|
|
ifrs-full:MajorCustomersMember |
| 806 |
Top Ten Customers [Member] |
Member |
|
|
gsm:TopTenCustomersMember |
| 807 |
Dow Corning Corporation [Member] |
Member |
|
|
gsm:DowCorningCorporationMember |
| 808 |
Disclosure of major customers [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfMajorCustomersLineItems |
| 809 |
Disclosure of major customers [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfMajorCustomersAbstract |
| 810 |
Sales |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromContractsWithCustomers |
| 811 |
Number of major customers |
Concept (Integer) |
For Period |
|
gsm:NumberOfCustomersInGroup |
| 812 |
Percentage of Company's sales |
Concept (Percent) |
For Period |
|
ifrs-full:PercentageOfEntitysRevenue |
| 813 |
40701 - Disclosure - Goodwill - Changes in carrying amount and impairment testing (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureGoodwillChangesInCarryingAmountAndImpairmentTestingDetails |
| 814 |
Disclosure of reconciliation of changes in goodwill [table] |
Table |
* |
* |
ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillTable |
| 815 |
Business combinations [axis] |
Axis |
|
|
ifrs-full:BusinessCombinationsAxis |
| 816 |
Entity's total for business combinations [member] |
Member |
|
|
ifrs-full:EntitysTotalForBusinessCombinationsMember |
| 817 |
Globe Specialty Metals Inc |
Member |
|
|
gsm:GlobeSpecialtyMetalsIncMember |
| 818 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 819 |
Segments [member] |
Member |
|
|
ifrs-full:SegmentsMember |
| 820 |
Electrometallurgy - North America |
Member |
|
|
gsm:ElectrometallurgyNorthAmericaSegmentMember |
| 821 |
Electrometallurgy United States Segment |
Member |
|
|
gsm:ElectrometallurgyUnitedStatesSegmentMember |
| 822 |
Electrometallurgy Canada Segment |
Member |
|
|
gsm:ElectrometallurgyCanadaSegmentMember |
| 823 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 824 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 825 |
North America |
Member |
|
|
srt:NorthAmericaMember |
| 826 |
CANADA |
Member |
|
|
country:CA |
| 827 |
Disclosure of reconciliation of changes in goodwill [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfReconciliationOfChangesInGoodwillLineItems |
| 828 |
Reconciliation of changes in goodwill [abstract] |
Abstract |
|
|
ifrs-full:ReconciliationOfChangesInGoodwillAbstract |
| 829 |
Goodwill at beginning of period |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Goodwill |
| 830 |
Impairment |
Concept (Monetary) |
For Period |
|
ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill |
| 831 |
Exchange differences |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesGoodwill |
| 832 |
Goodwill at end of period |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Goodwill |
| 833 |
40702 - Disclosure - Goodwill - Key assumptions used in the determination of recoverable value (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureGoodwillKeyAssumptionsUsedInDeterminationOfRecoverableValueDetails |
| 834 |
Disclosure of significant unobservable inputs used in fair value measurement of assets [table] |
Table |
* |
* |
ifrs-full:DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsTable |
| 835 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 836 |
Segments [member] |
Member |
|
|
ifrs-full:SegmentsMember |
| 837 |
Electrometallurgy - North America |
Member |
|
|
gsm:ElectrometallurgyNorthAmericaSegmentMember |
| 838 |
Electrometallurgy United States Segment |
Member |
|
|
gsm:ElectrometallurgyUnitedStatesSegmentMember |
| 839 |
Electrometallurgy Canada Segment |
Member |
|
|
gsm:ElectrometallurgyCanadaSegmentMember |
| 840 |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsLineItems |
| 841 |
Disclosure of significant unobservable inputs used in fair value measurement of assets [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsAbstract |
| 842 |
Weighted Average Cost of Capital |
Concept (Percent) |
For Period |
|
ifrs-full:WeightedAverageCostOfCapitalSignificantUnobservableInputsAssets |
| 843 |
Long-Term Growth Rate |
Concept (Percent) |
For Period |
|
gsm:LongTermGrowthRateSignificantUnobservableInputsAssets |
| 844 |
Normalized Tax Rate |
Concept (Percent) |
For Period |
|
gsm:NormalizedTaxRateSignificantUnobservableInputsAssets |
| 845 |
Normalized Cash Free Net Working Capital |
Concept (Percent) |
For Period |
|
gsm:FreeNetWorkingCapitalSignificantUnobservableInputsAssets |
| 846 |
Period of projections |
Concept (xbrli:durationItemType) |
For Period |
|
gsm:TermOfProjectionsSignificantUnobservableInputsAssets |
| 847 |
40703 - Disclosure - Goodwill - Sensitivity to changes in assumptions (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureGoodwillSensitivityToChangesInAssumptionsDetails |
| 848 |
Disclosure of significant unobservable inputs used in fair value measurement of assets [table] |
Table |
* |
* |
ifrs-full:DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsTable |
| 849 |
Business combinations [axis] |
Axis |
|
|
ifrs-full:BusinessCombinationsAxis |
| 850 |
Entity's total for business combinations [member] |
Member |
|
|
ifrs-full:EntitysTotalForBusinessCombinationsMember |
| 851 |
Globe Specialty Metals Inc |
Member |
|
|
gsm:GlobeSpecialtyMetalsIncMember |
| 852 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 853 |
Segments [member] |
Member |
|
|
ifrs-full:SegmentsMember |
| 854 |
Electrometallurgy - North America |
Member |
|
|
gsm:ElectrometallurgyNorthAmericaSegmentMember |
| 855 |
Electrometallurgy United States Segment |
Member |
|
|
gsm:ElectrometallurgyUnitedStatesSegmentMember |
| 856 |
Electrometallurgy Canada Segment |
Member |
|
|
gsm:ElectrometallurgyCanadaSegmentMember |
| 857 |
Measurement [axis] |
Axis |
|
|
ifrs-full:MeasurementAxis |
| 858 |
Aggregated measurement [member] |
Member |
|
|
ifrs-full:AggregatedMeasurementMember |
| 859 |
Sensitivity On Discount Rate, Decrease By Ten Percent |
Member |
|
|
gsm:SensitivityOnDiscountRateDecreaseByTenPercentMember |
| 860 |
Sensitivity On Discount Rate, Increase By Ten Percent |
Member |
|
|
gsm:SensitivityOnDiscountRateIncreaseByTenPercentMember |
| 861 |
Sensitivity On Long Term Growth Rate, Decrease By Ten Percent |
Member |
|
|
gsm:SensitivityOnLongTermGrowthRateDecreaseByTenPercentMember |
| 862 |
Sensitivity On Long Term Growth Rate, Increase By Ten Percent |
Member |
|
|
gsm:SensitivityOnLongTermGrowthRateIncreaseByTenPercentMember |
| 863 |
Sensitivity On Cash Flows, Decrease By Ten Percent |
Member |
|
|
gsm:SensitivityOnCashFlowsDecreaseByTenPercentMember |
| 864 |
Sensitivity On Cash Flows, Increase By Ten Percent |
Member |
|
|
gsm:SensitivityOnCashFlowsIncreaseByTenPercentMember |
| 865 |
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsLineItems |
| 866 |
Disclosure of significant unobservable inputs used in fair value measurement of assets [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsAbstract |
| 867 |
Percentage of equity interests acquired |
Concept (Percent) |
As Of |
|
ifrs-full:PercentageOfVotingEquityInterestsAcquired |
| 868 |
Goodwill |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:Goodwill |
| 869 |
Excess of recoverable value over carrying value |
Concept (Monetary) |
As Of |
Debit |
gsm:ExcessOfRecoverableValueOverCarryingValueOfBusinessAcquisition |
| 870 |
Increase (decrease) in value of cash generating units |
Concept (Monetary) |
As Of |
Debit |
gsm:AggregateIncreaseDecreaseInFairValueOfBusinessAcquisition |
| 871 |
Impairment charge related to goodwill |
Concept (Monetary) |
For Period |
|
ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill |
| 872 |
40801 - Disclosure - Other intangible assets (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherIntangibleAssetsDetails |
| 873 |
Disclosure of detailed information about intangible assets [table] |
Table |
* |
* |
ifrs-full:DisclosureOfIntangibleAssetsTable |
| 874 |
Classes of intangible assets other than goodwill [axis] |
Axis |
|
|
ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis |
| 875 |
Intangible assets other than goodwill [member] |
Member |
|
|
ifrs-full:IntangibleAssetsOtherThanGoodwillMember |
| 876 |
Capitalised development expenditure |
Member |
|
|
ifrs-full:CapitalisedDevelopmentExpenditureMember |
| 877 |
Power Supply Agreements |
Member |
|
|
gsm:PowerSupplyAgreementsMember |
| 878 |
Rights of use |
Member |
|
|
gsm:IFRSContractualRightsMember |
| 879 |
Computer software |
Member |
|
|
ifrs-full:ComputerSoftwareMember |
| 880 |
Other intangible assets |
Member |
|
|
ifrs-full:OtherIntangibleAssetsMember |
| 881 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 882 |
Segments [member] |
Member |
|
|
ifrs-full:SegmentsMember |
| 883 |
Other segments |
Member |
|
|
ifrs-full:AllOtherSegmentsMember |
| 884 |
Geographical [Axis] |
Axis |
|
|
srt:StatementGeographicalAxis |
| 885 |
Geographical [Domain] |
Member |
|
|
srt:SegmentGeographicalDomain |
| 886 |
Spain |
Member |
|
|
country:ES |
| 887 |
Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] |
Axis |
|
|
ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis |
| 888 |
Carrying amount [member] |
Member |
|
|
ifrs-full:CarryingAmountMember |
| 889 |
Gross carrying amount |
Member |
|
|
ifrs-full:GrossCarryingAmountMember |
| 890 |
Accumulated depreciation and amortisation |
Member |
|
|
ifrs-full:AccumulatedDepreciationAndAmortisationMember |
| 891 |
Accumulated impairment |
Member |
|
|
ifrs-full:AccumulatedImpairmentMember |
| 892 |
Disclosure of detailed information about intangible assets [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfIntangibleAssetsLineItems |
| 893 |
Reconciliation of changes in intangible assets other than goodwill [abstract] |
Abstract |
|
|
ifrs-full:ReconciliationOfChangesInIntangibleAssetsOtherThanGoodwillAbstract |
| 894 |
Other intangible assets at beginning of the year |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IntangibleAssetsOtherThanGoodwill |
| 895 |
Additions |
Concept (Monetary) |
For Period |
Debit |
gsm:NetAdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill |
| 896 |
Disposals |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DisposalsIntangibleAssetsOtherThanGoodwill |
| 897 |
Business combinations (Note 5) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill |
| 898 |
Transfers from/(to) other accounts |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncreaseDecreaseThroughTransfersIntangibleAssetsOtherThanGoodwill |
| 899 |
Exchange differences |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill |
| 900 |
Other intangible assets at end of the year |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IntangibleAssetsOtherThanGoodwill |
| 901 |
Impairment of intangible assets |
Concept (Monetary) |
For Period |
|
ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill |
| 902 |
Intangible assets pledged as security |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:IntangibleAssetsPledgedAsSecurityForLiabilities |
| 903 |
40901 - Disclosure - Property, plant and equipment - Detail net of accumulated depreciation and impairment (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosurePropertyPlantAndEquipmentDetailNetOfAccumulatedDepreciationAndImpairmentDetails |
| 904 |
Disclosure of detailed information about property, plant and equipment [table] |
Table |
* |
* |
ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable |
| 905 |
Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] |
Axis |
|
|
ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis |
| 906 |
Carrying amount [member] |
Member |
|
|
ifrs-full:CarryingAmountMember |
| 907 |
Gross carrying amount |
Member |
|
|
ifrs-full:GrossCarryingAmountMember |
| 908 |
Accumulated depreciation and amortisation |
Member |
|
|
ifrs-full:AccumulatedDepreciationAndAmortisationMember |
| 909 |
Accumulated impairment |
Member |
|
|
ifrs-full:AccumulatedImpairmentMember |
| 910 |
Classes of property, plant and equipment [axis] |
Axis |
|
|
ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis |
| 911 |
Property, plant & equipment |
Member |
|
|
ifrs-full:PropertyPlantAndEquipmentMember |
| 912 |
Land and buildings |
Member |
|
|
ifrs-full:LandAndBuildingsMember |
| 913 |
Plant and Machinery |
Member |
|
|
ifrs-full:MachineryMember |
| 914 |
Other Fixtures, Tools and Furniture |
Member |
|
|
ifrs-full:FixturesAndFittingsMember |
| 915 |
Advances Property, Plant and Equipment in the Course of Construction |
Member |
|
|
ifrs-full:ConstructionInProgressMember |
| 916 |
Mineral Reserves |
Member |
|
|
gsm:MineralReservesMember |
| 917 |
Other Items of Property, Plant and Equipment |
Member |
|
|
ifrs-full:OtherPropertyPlantAndEquipmentMember |
| 918 |
Disclosure of detailed information about property, plant and equipment [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems |
| 919 |
Reconciliation of changes in property, plant and equipment [abstract] |
Abstract |
|
|
ifrs-full:ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract |
| 920 |
Property, plant and equipment at beginning of the year |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PropertyPlantAndEquipment |
| 921 |
Additions |
Concept (Monetary) |
For Period |
Debit |
gsm:NetAdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment |
| 922 |
Disposals and other |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DisposalsAndRetirementsPropertyPlantAndEquipment |
| 923 |
Transfers from/(to) other accounts |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment |
| 924 |
Exchange differences |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment |
| 925 |
Business combinations |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment |
| 926 |
Business disposals |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DisposalsPropertyPlantAndEquipment |
| 927 |
Additions to the scope of consolidation |
Concept (Monetary) |
For Period |
Debit |
gsm:AdditionsToScopeOfConsolidationPropertyPlantAndEquipment |
| 928 |
Transfer from assets and disposal groups classified as held for sale |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DecreaseThroughClassifiedAsHeldForSalePropertyPlantAndEquipment |
| 929 |
Property, plant and equipment at end of the year |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PropertyPlantAndEquipment |
| 930 |
40902 - Disclosure - Property, plant and equipment - Impairment, disposals and pledged as security (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosurePropertyPlantAndEquipmentImpairmentDisposalsAndPledgedAsSecurityDetails |
| 931 |
Disclosure of detailed information about property, plant and equipment [table] |
Table |
* |
* |
ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable |
| 932 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 933 |
Segments [member] |
Member |
|
|
ifrs-full:SegmentsMember |
| 934 |
Other segments |
Member |
|
|
ifrs-full:AllOtherSegmentsMember |
| 935 |
Geographical [Axis] |
Axis |
|
|
srt:StatementGeographicalAxis |
| 936 |
Geographical [Domain] |
Member |
|
|
srt:SegmentGeographicalDomain |
| 937 |
Spain |
Member |
|
|
country:ES |
| 938 |
Classes of property, plant and equipment [axis] |
Axis |
|
|
ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis |
| 939 |
Property, plant & equipment |
Member |
|
|
ifrs-full:PropertyPlantAndEquipmentMember |
| 940 |
Land and buildings |
Member |
|
|
ifrs-full:LandAndBuildingsMember |
| 941 |
Disclosure of detailed information about property, plant and equipment [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems |
| 942 |
Disclosure of impairment loss and reversal of impairment loss [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossAbstract |
| 943 |
Impairment charge related to goodwill |
Concept (Monetary) |
For Period |
|
ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill |
| 944 |
Impairment charge related to intangible assets |
Concept (Monetary) |
For Period |
|
ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill |
| 945 |
Impairment charge related to Property, plant and equipment |
Concept (Monetary) |
For Period |
|
ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment |
| 946 |
Property, plant and equipment pledged as security for outstanding bank loans and other payables |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PropertyPlantAndEquipmentPledgedAsSecurity |
| 947 |
40903 - Disclosure - Property, plant and equipment - Finance leases (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosurePropertyPlantAndEquipmentFinanceLeasesDetails |
| 948 |
Disclosure of recognised finance lease as assets by lessee [table] |
Table |
* |
* |
ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeTable |
| 949 |
Classes of assets [axis] |
Axis |
|
|
ifrs-full:ClassesOfAssetsAxis |
| 950 |
Assets [member] |
Member |
|
|
ifrs-full:ClassesOfAssetsMember |
| 951 |
Hydroelectrical Installations |
Member |
|
|
gsm:HydroelectricalInstallationsMember |
| 952 |
Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] |
Axis |
|
|
ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis |
| 953 |
Carrying amount [member] |
Member |
|
|
ifrs-full:CarryingAmountMember |
| 954 |
Gross carrying amount |
Member |
|
|
ifrs-full:GrossCarryingAmountMember |
| 955 |
Accumulated depreciation and amortisation |
Member |
|
|
ifrs-full:AccumulatedDepreciationAndAmortisationMember |
| 956 |
Disclosure of recognised finance lease as assets by lessee [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeLineItems |
| 957 |
Disclosure of recognised finance lease as assets by lessee [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeAbstract |
| 958 |
Life |
Concept (xbrli:durationItemType) |
For Period |
|
gsm:IFRSLesseeFinanceLeaseTermOfContract |
| 959 |
Time Elapsed |
Concept (xbrli:durationItemType) |
For Period |
|
gsm:LesseeFinanceLeaseTimeElapsed |
| 960 |
Finance leases |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:RecognisedFinanceLeaseAsAssets |
| 961 |
Interest Payable |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:FutureFinanceChargeOnFinanceLease |
| 962 |
Lease Payments Outstanding |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:MinimumFinanceLeasePaymentsPayable |
| 963 |
40904 - Disclosure - Property, plant and equipment - Commitments (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosurePropertyPlantAndEquipmentCommitmentsDetails |
| 964 |
Implied Table |
Table |
* |
* |
implied:Table |
| 965 |
Disclosure of detailed information about property, plant and equipment [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract |
| 966 |
Disclosure of joint ventures [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfJointVenturesAbstract |
| 967 |
Capital expenditure commitments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CapitalCommitments |
| 968 |
41001 - Disclosure - Financial assets and other receivables - Financial assets (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFinancialAssetsAndOtherReceivablesFinancialAssetsDetails |
| 969 |
Disclosure of financial assets [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialAssetsTable |
| 970 |
Categories of financial assets [axis] |
Axis |
|
|
ifrs-full:CategoriesOfFinancialAssetsAxis |
| 971 |
Financial assets, category [member] |
Member |
|
|
ifrs-full:FinancialAssetsCategoryMember |
| 972 |
Amortised cost |
Member |
|
|
ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember |
| 973 |
Fair value through profit or loss - mandatorily measured |
Member |
|
|
ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValueCategoryMember |
| 974 |
Classes of financial assets [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialAssetsAxis |
| 975 |
Financial assets, class [member] |
Member |
|
|
ifrs-full:FinancialAssetsMember |
| 976 |
Other financial assets |
Member |
|
|
gsm:OtherFinancialAssetsMember |
| 977 |
Receivables from related parties |
Member |
|
|
gsm:ReceivablesFromRelatedPartiesMember |
| 978 |
Trade receivables |
Member |
|
|
ifrs-full:TradeReceivablesMember |
| 979 |
Other receivables |
Member |
|
|
gsm:OtherReceivablesMember |
| 980 |
Cash and cash equivalents |
Member |
|
|
us-gaap:CashAndCashEquivalentsMember |
| 981 |
Disclosure of financial assets [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialAssetsLineItems |
| 982 |
Total financial assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:FinancialAssets |
| 983 |
41002 - Disclosure - Financial assets and other receivables - Other financial assets (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFinancialAssetsAndOtherReceivablesOtherFinancialAssetsDetails |
| 984 |
Disclosure of financial assets [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialAssetsTable |
| 985 |
Categories of financial assets [axis] |
Axis |
|
|
ifrs-full:CategoriesOfFinancialAssetsAxis |
| 986 |
Financial assets, category [member] |
Member |
|
|
ifrs-full:FinancialAssetsCategoryMember |
| 987 |
Amortised cost |
Member |
|
|
ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember |
| 988 |
Fair value through other comprehensive income - designated |
Member |
|
|
ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember |
| 989 |
Fair value through profit or loss - mandatorily measured |
Member |
|
|
ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossMandatorilyMeasuredAtFairValueCategoryMember |
| 990 |
Loans and receivables |
Member |
|
|
ifrs-full:LoansAndReceivablesCategoryMember |
| 991 |
Classes of financial assets [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialAssetsAxis |
| 992 |
Financial assets, class [member] |
Member |
|
|
ifrs-full:FinancialAssetsMember |
| 993 |
Other financial assets |
Member |
|
|
gsm:OtherFinancialAssetsMember |
| 994 |
Equity securities |
Member |
|
|
us-gaap:EquitySecuritiesMember |
| 995 |
Debt investments |
Member |
|
|
us-gaap:DebtSecuritiesMember |
| 996 |
Disclosure of financial assets [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialAssetsLineItems |
| 997 |
Other non-current financial assets held with third parties |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherNoncurrentFinancialAssets |
| 998 |
Other current financial assets held with third parties |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherCurrentFinancialAssets |
| 999 |
Other total financial assets held with third parties |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherFinancialAssets |
| 1000 |
Impairment on non-recoverable loans and receivables |
Concept (Monetary) |
For Period |
Debit |
gsm:ImpairmentOnNonRecoverableLoansAndReceivables |
| 1001 |
Investment in subordinated loan notes |
Concept (Monetary) |
As Of |
Debit |
gsm:InvestmentInSubordinatedLoanNotes |
| 1002 |
41003 - Disclosure - Financial assets and other receivables - Trade and other receivables (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFinancialAssetsAndOtherReceivablesTradeAndOtherReceivablesDetails |
| 1003 |
Disclosure of financial assets [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialAssetsTable |
| 1004 |
Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] |
Axis |
|
|
ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis |
| 1005 |
Carrying amount [member] |
Member |
|
|
ifrs-full:CarryingAmountMember |
| 1006 |
Accumulated impairment |
Member |
|
|
ifrs-full:AccumulatedImpairmentMember |
| 1007 |
Disclosure of financial assets [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialAssetsLineItems |
| 1008 |
Trade and other current receivables [abstract] |
Abstract |
|
|
ifrs-full:TradeAndOtherCurrentReceivablesAbstract |
| 1009 |
Trade receivables |
Concept (Monetary) |
As Of |
Debit |
gsm:CurrentTradeReceivablesGross |
| 1010 |
Less – allowance for doubtful debts |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets |
| 1011 |
Trade receivables, net |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentTradeReceivables |
| 1012 |
Tax receivables (1) |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentValueAddedTaxReceivables |
| 1013 |
Government grant receivables |
Concept (Monetary) |
As Of |
Debit |
gsm:CurrentGovernmentGrantReceivables |
| 1014 |
Other receivables |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherCurrentReceivables |
| 1015 |
Trade and other receivables |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:TradeAndOtherCurrentReceivables |
| 1016 |
41004 - Disclosure - Financial assets and other receivables - Changes in impairment losses (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFinancialAssetsAndOtherReceivablesChangesInImpairmentLossesDetails |
| 1017 |
Disclosure of impairment loss and reversal of impairment loss [table] |
Table |
* |
* |
ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossTable |
| 1018 |
Major customers [axis] |
Axis |
|
|
ifrs-full:MajorCustomersAxis |
| 1019 |
Customers [member] |
Member |
|
|
ifrs-full:MajorCustomersMember |
| 1020 |
Dow Corning Corporation [Member] |
Member |
|
|
gsm:DowCorningCorporationMember |
| 1021 |
Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] |
Axis |
|
|
ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis |
| 1022 |
Carrying amount [member] |
Member |
|
|
ifrs-full:CarryingAmountMember |
| 1023 |
Accumulated impairment |
Member |
|
|
ifrs-full:AccumulatedImpairmentMember |
| 1024 |
Disclosure of impairment loss and reversal of impairment loss [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossLineItems |
| 1025 |
Reconciliation of changes in allowance account for credit losses of financial assets [abstract] |
Abstract |
|
|
ifrs-full:ReconciliationOfChangesInAllowanceAccountForCreditLossesOfFinancialAssetsAbstract |
| 1026 |
Financial assets at beginning of period |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:FinancialAssets |
| 1027 |
Impairment losses recognized (Note 25.3) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncreaseDecreaseThroughTransfersFinancialAssets |
| 1028 |
Amounts written off as uncollectible |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DecreaseThroughWriteoffFinancialAssets |
| 1029 |
Exchange differences |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncreaseDecreaseThroughForeignExchangeFinancialAssets |
| 1030 |
Financial assets at end of period |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:FinancialAssets |
| 1031 |
% of sales |
Concept (Percent) |
For Period |
|
ifrs-full:PercentageOfEntitysRevenue |
| 1032 |
41005 - Disclosure - Financial assets and other receivables - Government Grants (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFinancialAssetsAndOtherReceivablesGovernmentGrantsDetails |
| 1033 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1034 |
Other financial assets |
Abstract |
|
|
ifrs-full:DisclosureOfFinancialAssetsAbstract |
| 1035 |
Income from government grants |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromGovernmentGrants |
| 1036 |
Expense related to government grants |
Concept (Monetary) |
For Period |
Debit |
gsm:ExpensesFromGovernmentGrants |
| 1037 |
Net income (loss) related to government grants |
Concept (Monetary) |
For Period |
Credit |
gsm:RevenueExpensesFromGovernmentGrants |
| 1038 |
Carrying amount of factored receivables and the secured borrowings |
Concept (Monetary) |
As Of |
Debit |
gsm:CurrentFactoredReceivableAndSecuredBorrowings |
| 1039 |
41006 - Disclosure - Financial assets and other receivables - Securitization of trade receivables (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFinancialAssetsAndOtherReceivablesSecuritizationOfTradeReceivablesDetails |
| 1040 |
Disclosure of continuing involvement in derecognised financial assets [table] |
Table |
* |
* |
ifrs-full:DisclosureOfContinuingInvolvementInDerecognisedFinancialAssetsTable |
| 1041 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 1042 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 1043 |
Maximum |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 1044 |
Continuing involvement in derecognised financial assets by type of instrument [axis] |
Axis |
|
|
ifrs-full:ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentAxis |
| 1045 |
Types of instrument [member] |
Member |
|
|
ifrs-full:TypesOfInstrumentMember |
| 1046 |
Senior Subordinated Loan |
Member |
|
|
gsm:SeniorSubordinatedLoanMember |
| 1047 |
Junior Subordinated Loan |
Member |
|
|
gsm:JuniorSubordinatedLoanMember |
| 1048 |
Continuing involvement in derecognised financial assets by type of transfer [axis] |
Axis |
|
|
ifrs-full:ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfTransferAxis |
| 1049 |
Types of transfer [member] |
Member |
|
|
ifrs-full:TypesOfTransferMember |
| 1050 |
Securitizations |
Member |
|
|
ifrs-full:SecuritisationsMember |
| 1051 |
Factoring of receivables |
Member |
|
|
ifrs-full:FactoringOfReceivablesMember |
| 1052 |
Securitization of trade receivables |
LineItems |
|
|
ifrs-full:DisclosureOfContinuingInvolvementInDerecognisedFinancialAssetsLineItems |
| 1053 |
Upfront cash consideration |
Concept (Monetary) |
For Period |
Debit |
gsm:UpfrontCashConsideration |
| 1054 |
Term of the securitization program |
Concept (xbrli:durationItemType) |
For Period |
|
gsm:TermOfSecuritizationProgram |
| 1055 |
Trade receivables sold under securitization program |
Concept (Monetary) |
For Period |
Debit |
gsm:TradeReceivablesSoldUnderSecuritizationProgram |
| 1056 |
Loss on transferral of trade receivables |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainLossOfDerecognisedFinancialAssetsAtDateOfTransfer |
| 1057 |
Interest earned on SPE loans |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:InterestIncomeOnLoansAndReceivables |
| 1058 |
Fixed-rate servicing fees |
Concept (Monetary) |
For Period |
Credit |
gsm:FixedServicingFeesEarned |
| 1059 |
Additional servicing fees earned |
Concept (Monetary) |
For Period |
Credit |
gsm:VariableServicingFeesEarned |
| 1060 |
Recognised assets representing continuing involvement in derecognised financial assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:RecognisedAssetsRepresentingContinuingInvolvementInDerecognisedFinancialAssets |
| 1061 |
Amount |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentFinancialAssetsAtFairValueThroughProfitOrLoss |
| 1062 |
Interest Rate |
Concept (Percent) |
For Period |
|
ifrs-full:InterestRateSignificantUnobservableInputsAssets |
| 1063 |
Maximum commitment by Finacity Capital Management |
Concept (Monetary) |
For Period |
Credit |
gsm:MaximumInvestmentCommitmentByIntermediateSubordinatedLender |
| 1064 |
Factored receivable |
Concept (Monetary) |
For Period |
Debit |
gsm:CurrentFactoredReceivable |
| 1065 |
41101 - Disclosure - Inventories - Schedule (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureInventoriesScheduleDetails |
| 1066 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1067 |
Inventories. |
Abstract |
|
|
ifrs-full:ClassesOfInventoriesAbstract |
| 1068 |
Finished goods |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:FinishedGoods |
| 1069 |
Raw materials in progress and industrial supplies |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:WorkInProgress |
| 1070 |
Other inventories |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherInventories |
| 1071 |
Advances to suppliers |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentAdvancesToSuppliers |
| 1072 |
Total inventories |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InventoriesTotal |
| 1073 |
41102 - Disclosure - Inventories - Narrative (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureInventoriesNarrativeDetails |
| 1074 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1075 |
Inventories. |
Abstract |
|
|
ifrs-full:ClassesOfInventoriesAbstract |
| 1076 |
Write-downs (reversals of write-downs) of inventories [abstract] |
Abstract |
|
|
ifrs-full:WritedownsReversalsOfWritedownsOfInventoriesAbstract |
| 1077 |
Inventory write-down |
Concept (Monetary) |
For Period |
|
ifrs-full:InventoryWritedown2011 |
| 1078 |
Purchase Commitments And Collateral [Abstract] |
Abstract |
|
|
gsm:PurchaseCommitmentsAndCollateralAbstract |
| 1079 |
Inventories secured |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:InventoriesPledgedAsSecurityForLiabilities |
| 1080 |
41201 - Disclosure - Other assets - Non-current and current assets (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherAssetsNonCurrentAndCurrentAssetsDetails |
| 1081 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1082 |
Other assets abstract |
Abstract |
|
|
gsm:OtherAssetAbstract |
| 1083 |
Guarantees and deposits given - Non-Current |
Concept (Monetary) |
As Of |
Debit |
gsm:NoncurrentGuaranteesAndNoncurrentDeposits |
| 1084 |
Guarantees and deposits given - Current |
Concept (Monetary) |
As Of |
Debit |
gsm:CurrentGuaranteesAndCurrentDeposits |
| 1085 |
Guarantees and deposits given - Total |
Concept (Monetary) |
As Of |
Debit |
gsm:GuaranteesAndDeposits |
| 1086 |
Prepayments and accrued income - Non-Current |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentPrepaymentsAndNoncurrentAccruedIncome |
| 1087 |
Prepayments and accrued income - Current |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentPrepaymentsAndCurrentAccruedIncome |
| 1088 |
Prepayments and accrued income - Total |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PrepaymentsAndAccruedIncome |
| 1089 |
Biological assets - Non-Current |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentBiologicalAssets |
| 1090 |
Biological assets - Total |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:BiologicalAssets |
| 1091 |
Other assets - Non-Current |
Concept (Monetary) |
As Of |
Debit |
gsm:MiscellaneousOtherNoncurrentAssets |
| 1092 |
Other assets - Current |
Concept (Monetary) |
As Of |
Debit |
gsm:MiscellaneousOtherCurrentAssets |
| 1093 |
Other assets - Total |
Concept (Monetary) |
As Of |
Debit |
gsm:MiscellaneousOtherAssets |
| 1094 |
Non-Current |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherNoncurrentAssets |
| 1095 |
Current |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherCurrentAssets |
| 1096 |
Total |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherAssets |
| 1097 |
41301 - Disclosure - Equity - Share capital (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureEquityShareCapitalDetails |
| 1098 |
Disclosure of classes of share capital [table] |
Table |
* |
* |
ifrs-full:DisclosureOfClassesOfShareCapitalTable |
| 1099 |
Categories of related parties [axis] |
Axis |
|
|
ifrs-full:CategoriesOfRelatedPartiesAxis |
| 1100 |
Entity's total for related parties [member] |
Member |
|
|
ifrs-full:EntitysTotalForRelatedPartiesMember |
| 1101 |
Grupo Villar Mir SAU [Member] |
Member |
|
|
gsm:GrupoVillarMirSauMember |
| 1102 |
Classes of share capital [axis] |
Axis |
|
|
ifrs-full:ClassesOfShareCapitalAxis |
| 1103 |
Share capital [member] |
Member |
|
|
ifrs-full:ClassesOfShareCapitalMember |
| 1104 |
Ordinary shares [member] |
Member |
|
|
ifrs-full:OrdinarySharesMember |
| 1105 |
Class A |
Member |
|
|
gsm:ClassMember |
| 1106 |
Preference shares [member] |
Member |
|
|
ifrs-full:PreferenceSharesMember |
| 1107 |
Subsidiaries [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInSubsidiariesAxis |
| 1108 |
Entity's total for subsidiaries [member] |
Member |
|
|
ifrs-full:EntitysTotalForSubsidiariesMember |
| 1109 |
Grupo FerroAtlantica S.A.U. [Member] |
Member |
|
|
gsm:GrupoFerroatlanticaSauMember |
| 1110 |
Globe Specialty Metals Inc |
Member |
|
|
gsm:GlobeSpecialtyMetalsIncMember |
| 1111 |
Disclosure of classes of share capital [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfClassesOfShareCapitalLineItems |
| 1112 |
Shares issued (in shares) |
Concept (Shares) |
As Of |
|
ifrs-full:NumberOfSharesIssued |
| 1113 |
Issue of equity |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IssueOfEquity |
| 1114 |
Par value per share |
Concept (Share) |
As Of |
|
ifrs-full:ParValuePerShare |
| 1115 |
Shares consolidated |
Concept (Shares) |
As Of |
|
gsm:NumberOfConsolidatedShares |
| 1116 |
New shares issued after consolidation |
Concept (Shares) |
As Of |
|
gsm:NewSharesIssuedAfterConsolidation |
| 1117 |
Number of shares outstanding |
Concept (Shares) |
As Of |
|
ifrs-full:NumberOfSharesOutstanding |
| 1118 |
Number of shares outstanding, including treasury shares |
Concept (Shares) |
For Period |
|
gsm:NumberOfSharesOutstandingIncludingTreasuryShares |
| 1119 |
Treasury shares |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:TreasuryShares |
| 1120 |
Number of ordinary shares issued |
Concept (Shares) |
For Period |
|
ifrs-full:IncreaseDecreaseInNumberOfOrdinarySharesIssued |
| 1121 |
Number of shares issued at vesting of restricted stock units |
Concept (Shares) |
For Period |
|
gsm:NumberOfSharesIssuedUponVestingRestrictedStockUnits |
| 1122 |
Number of share options exercised in share-based payment arrangement |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement |
| 1123 |
Equity |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Equity |
| 1124 |
The number of beneficially shares owned |
Concept (Shares) |
For Period |
|
gsm:NumberSharesBeneficiallyOwned |
| 1125 |
Outstanding shares owned by main shareholders (as a percentage) |
Concept (Percent) |
For Period |
|
gsm:PercentageOfOutstandingSharesOwned |
| 1126 |
41302 - Disclosure - Equity - Valuation adjustments (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureEquityValuationAdjustmentsDetails |
| 1127 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1128 |
Equity [abstract] |
Abstract |
|
|
ifrs-full:EquityAbstract |
| 1129 |
Actuarial gains and losses |
Concept (Monetary) |
As Of |
Credit |
gsm:ActuarialGainLossValuationAdjustment |
| 1130 |
Hedging instruments and other |
Concept (Monetary) |
As Of |
Credit |
gsm:HedgingInstrumentAndOtherValuationAdjustment |
| 1131 |
Valuation adjustments |
Concept (Monetary) |
As Of |
Credit |
gsm:AccumulatedValuationAdjustments |
| 1132 |
41303 - Disclosure - Equity - Net financial debt (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureEquityNetFinancialDebtDetails |
| 1133 |
Disclosure of classes of share capital [table] |
Table |
* |
* |
ifrs-full:DisclosureOfClassesOfShareCapitalTable |
| 1134 |
Continuing and discontinued operations [axis] |
Axis |
|
|
ifrs-full:ContinuingAndDiscontinuedOperationsAxis |
| 1135 |
Continuing operations |
Member |
|
|
ifrs-full:ContinuingOperationsMember |
| 1136 |
Spanish energy business classified as held for sale |
Member |
|
|
gsm:SpanishEnergyBusinessDisposalGroupDiscontinuedOperationsMember |
| 1137 |
Disclosure of classes of share capital [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfClassesOfShareCapitalLineItems |
| 1138 |
Consolidated equity |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Equity |
| 1139 |
Gross financial debt |
Concept (Monetary) |
As Of |
Credit |
gsm:GrossFinancialDebt |
| 1140 |
Cash and cash equivalents |
Concept (Monetary) |
As Of |
Debit |
gsm:CashAndCashEquivalentsFromContinuedOperations |
| 1141 |
Cash and cash equivalents |
Concept (Monetary) |
As Of |
Debit |
gsm:CashAndCashEquivalentsFromDiscontinuedOperations |
| 1142 |
Net financial debt |
Concept (Monetary) |
As Of |
Credit |
gsm:NetFinancialDebt |
| 1143 |
Net financial debt, including discontinued operations |
Concept (Monetary) |
As Of |
Credit |
gsm:NetFinancialDebtIncludingDiscontinuedOperations |
| 1144 |
Net financial debt/Consolidated equity |
Concept (Percent) |
For Period |
|
gsm:PercentageNetFinancialDebtToConsolidatedEquity |
| 1145 |
Net financial debt/Consolidated equity, including discontinued operations |
Concept (Pure) |
For Period |
|
gsm:PercentageNetFinancialDebtToConsolidatedEquityIncludingDiscontinuedOperations |
| 1146 |
41304 - Disclosure - Equity - Distribution of borrowings (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureEquityDistributionOfBorrowingsDetails |
| 1147 |
Disclosure of classes of share capital [table] |
Table |
* |
* |
ifrs-full:DisclosureOfClassesOfShareCapitalTable |
| 1148 |
Continuing and discontinued operations [axis] |
Axis |
|
|
ifrs-full:ContinuingAndDiscontinuedOperationsAxis |
| 1149 |
Continuing operations |
Member |
|
|
ifrs-full:ContinuingOperationsMember |
| 1150 |
Spanish energy business classified as held for sale |
Member |
|
|
gsm:SpanishEnergyBusinessDisposalGroupDiscontinuedOperationsMember |
| 1151 |
Disclosure of classes of share capital [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfClassesOfShareCapitalLineItems |
| 1152 |
Non-current gross financial debt |
Concept (Monetary) |
As Of |
Credit |
gsm:NonCurrentGrossFinancialDebt |
| 1153 |
Current gross financial debt |
Concept (Monetary) |
As Of |
Credit |
gsm:CurrentGrossFinancialDebt |
| 1154 |
Gross financial debt |
Concept (Monetary) |
As Of |
Credit |
gsm:GrossFinancialDebt |
| 1155 |
Non-current gross financial debt to total gross financial debt (as a percentage) |
Concept (Percent) |
As Of |
|
gsm:PercentageNonCurrentGrossFinancialDebtToTotalGrossFinancialDebt |
| 1156 |
Current gross financial debt to total gross financial debt (as a percentage) |
Concept (Percent) |
As Of |
|
gsm:PercentageCurrentGrossFinancialDebtToTotalGrossFinancialDebt |
| 1157 |
Gross financial debt (as a percentage) |
Concept (Percent) |
As Of |
|
gsm:PercentageTotalGrossFinancialDebt |
| 1158 |
Gross financial debt, including discontinued operations |
Concept (Monetary) |
As Of |
Credit |
gsm:GrossFinancialDebtIncludingDiscontinuedOperations |
| 1159 |
41305 - Disclosure - Equity - Share Repurchase Program (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureEquityShareRepurchaseProgramDetails |
| 1160 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1161 |
Equity [abstract] |
Abstract |
|
|
ifrs-full:EquityAbstract |
| 1162 |
Period of contract with brokers to purchase its ordinary shares |
Concept (xbrli:durationItemType) |
For Period |
|
gsm:PeriodOfContractWithBrokersToPurchaseItsOrdinaryShares |
| 1163 |
Maximum percentage of issued ordinary shared acquired by brokers |
Concept (Percent) |
For Period |
|
gsm:MaximumPercentageOfIssuedOrdinarySharesAcquiredByBrokers |
| 1164 |
Minimum share price |
Concept (Share) |
For Period |
|
gsm:MinimumSharePrice |
| 1165 |
Maximum price as percentage above average volume weighted average price |
Concept (Percent) |
For Period |
|
gsm:MaximumPriceAsPercentageAboveAverageVolumeWeightedAveragePrice |
| 1166 |
Number of business days prior to purchase used to calculate average volume weighted average price |
Concept (xbrli:durationItemType) |
For Period |
|
gsm:NumberOfBusinessDaysPriorToPurchaseUsedToCalculateAverageVolumeWeightedAveragePrice |
| 1167 |
Authorised repurchase amount |
Concept (Monetary) |
As Of |
Credit |
gsm:ShareRepurchaseProgrammeAuthorisedAmount |
| 1168 |
Number of shares acquired |
Concept (Shares) |
For Period |
|
gsm:NumberOfSharesRepurchased |
| 1169 |
Total consideration |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PaymentsToAcquireOrRedeemEntitysShares |
| 1170 |
Stamp duty |
Concept (Monetary) |
For Period |
Credit |
gsm:PaymentsOfStampDuty |
| 1171 |
Average price paid per share |
Concept (Share) |
For Period |
|
gsm:ShareRepurchasesAveragePricePaidPerShare |
| 1172 |
Purchased and cancelled |
Concept (Shares) |
For Period |
|
gsm:NumberOfSharesRepurchasedAndCancelled |
| 1173 |
Ordinary shares purchased into treasury |
Concept (Shares) |
For Period |
|
gsm:NumberOfSharesRepurchasedAndHeldInTreasury |
| 1174 |
41306 - Disclosure - Equity - Dividends (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureEquityDividendsDetails |
| 1175 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1176 |
Equity [abstract] |
Abstract |
|
|
ifrs-full:EquityAbstract |
| 1177 |
Number of interim dividend payments |
Concept (Integer) |
For Period |
|
gsm:NumberOfInterimDividendPayments |
| 1178 |
Dividends paid, per share |
Concept (Share) |
For Period |
|
ifrs-full:DividendsPaidOrdinarySharesPerShare |
| 1179 |
Dividends paid, ordinary shares |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:DividendsPaidOrdinaryShares |
| 1180 |
41307 - Disclosure - Equity - Changes in non-controlling interests (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureEquityChangesInNonControllingInterestsDetails |
| 1181 |
Statement of changes in equity [table] |
Table |
* |
* |
ifrs-full:StatementOfChangesInEquityTable |
| 1182 |
Components of equity [axis] |
Axis |
|
|
ifrs-full:ComponentsOfEquityAxis |
| 1183 |
Equity [member] |
Member |
|
|
ifrs-full:EquityMember |
| 1184 |
Noncontrolling interests |
Member |
|
|
ifrs-full:NoncontrollingInterestsMember |
| 1185 |
Statement of changes in equity [line items] |
LineItems |
|
|
ifrs-full:StatementOfChangesInEquityLineItems |
| 1186 |
Equity at beginning of period |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Equity |
| 1187 |
Loss for the year |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossAttributableToNoncontrollingInterests |
| 1188 |
Dividends paid to joint venture partner |
Concept (Monetary) |
For Period |
Debit |
gsm:DividendsPaidToJointVenturePartner |
| 1189 |
Non-controlling interest arising on the acquisition |
Concept (Monetary) |
For Period |
Credit |
gsm:IncreaseDecreaseOnNoncontrollingInterestAcquired |
| 1190 |
Increase of Parent's ownership interest |
Concept (Monetary) |
For Period |
Credit |
gsm:IncreaseDecreaseOnParentsOwnershipInterest |
| 1191 |
Translation differences and other |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity |
| 1192 |
Equity at end of period |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Equity |
| 1193 |
41308 - Disclosure - Equity - Non-controlling interests financial information (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureEquityNonControllingInterestsFinancialInformationDetails |
| 1194 |
Statement of changes in equity [table] |
Table |
* |
* |
ifrs-full:StatementOfChangesInEquityTable |
| 1195 |
Categories of related parties [axis] |
Axis |
|
|
ifrs-full:CategoriesOfRelatedPartiesAxis |
| 1196 |
Entity's total for related parties [member] |
Member |
|
|
ifrs-full:EntitysTotalForRelatedPartiesMember |
| 1197 |
WVA Manufacturing, LLC |
Member |
|
|
gsm:WvaManufacturingLlcMember |
| 1198 |
Quebec Silicon Limited Partnership [Member] |
Member |
|
|
gsm:QuebecSiliconLimitedPartnershipMember |
| 1199 |
Joint ventures [axis] |
Axis |
|
|
ifrs-full:JointVenturesAxis |
| 1200 |
Entity's total for joint ventures [member] |
Member |
|
|
ifrs-full:EntitysTotalForJointVenturesMember |
| 1201 |
Dow Corning Corporation [Member] |
Member |
|
|
gsm:DowCorningCorporationMember |
| 1202 |
Subsidiaries [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInSubsidiariesAxis |
| 1203 |
Entity's total for subsidiaries [member] |
Member |
|
|
ifrs-full:EntitysTotalForSubsidiariesMember |
| 1204 |
Globe Specialty Metals Inc |
Member |
|
|
gsm:GlobeSpecialtyMetalsIncMember |
| 1205 |
Components of equity [axis] |
Axis |
|
|
ifrs-full:ComponentsOfEquityAxis |
| 1206 |
Equity [member] |
Member |
|
|
ifrs-full:EquityMember |
| 1207 |
Noncontrolling interests |
Member |
|
|
ifrs-full:NoncontrollingInterestsMember |
| 1208 |
Statement of changes in equity [line items] |
LineItems |
|
|
ifrs-full:StatementOfChangesInEquityLineItems |
| 1209 |
CONSOLIDATED STATEMENT OF FINANCIAL POSITION |
Abstract |
|
|
ifrs-full:StatementOfFinancialPositionAbstract |
| 1210 |
Non-current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentAssets |
| 1211 |
Current assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentAssets |
| 1212 |
Non-current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentLiabilities |
| 1213 |
Current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentLiabilities |
| 1214 |
CONSOLIDATED INCOME STATEMENT |
Abstract |
|
|
ifrs-full:IncomeStatementAbstract |
| 1215 |
Sales |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromContractsWithCustomers |
| 1216 |
Operating profit |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossFromOperatingActivities |
| 1217 |
Profit before taxes |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossBeforeTax |
| 1218 |
Net profit (loss) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLoss |
| 1219 |
CONSOLIDATED STATEMENT OF CASH FLOWS |
Abstract |
|
|
ifrs-full:StatementOfCashFlowsAbstract |
| 1220 |
Cash flows from operating activities |
Concept (Monetary) |
For Period |
|
ifrs-full:CashFlowsFromUsedInOperatingActivities |
| 1221 |
Cash flows from investing activities |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CashFlowsFromUsedInInvestingActivities |
| 1222 |
Cash flows from financing activities |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CashFlowsFromUsedInFinancingActivities |
| 1223 |
Exchange differences on cash and cash equivalents in foreign currencies |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents |
| 1224 |
Beginning balance of cash and cash equivalents |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalents |
| 1225 |
Ending balance of cash and cash equivalents |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CashAndCashEquivalents |
| 1226 |
Non-controlling interests |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncontrollingInterests |
| 1227 |
Additional cost per operating agreement |
Concept (Monetary) |
For Period |
Debit |
gsm:OperatingAgreementAdditionalCostPerMetricTon |
| 1228 |
Membership interest sold (as a percentage) |
Concept (Percent) |
For Period |
|
gsm:PercentageMembershipInterestSold |
| 1229 |
Production output sold (as a percentage) |
Concept (Percent) |
For Period |
|
gsm:PercentageOfProductionOutputSold |
| 1230 |
41401 - Disclosure - Earnings (loss) per ordinary share (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureEarningsLossPerOrdinaryShareDetails |
| 1231 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1232 |
Earnings per share [abstract] |
Abstract |
|
|
ifrs-full:EarningsPerShareAbstract |
| 1233 |
Earnings Per Share Continued And Discontinued Operations [Abstract] |
Abstract |
|
|
gsm:EarningsPerShareContinuedAndDiscontinuedOperationsAbstract |
| 1234 |
Basic loss per ordinary share computation |
Abstract |
|
|
ifrs-full:BasicEarningsPerShareAbstract |
| 1235 |
Numerator: |
Abstract |
|
|
gsm:EarningsPerShareNumeratorAbstract |
| 1236 |
Profit (loss) attributable to the Parent (US$'000) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossAttributableToOwnersOfParent |
| 1237 |
Denominator: |
Abstract |
|
|
gsm:WeightedAverageSharesAbstract |
| 1238 |
Weighted average basic shares outstanding |
Concept (Shares) |
For Period |
|
ifrs-full:WeightedAverageShares |
| 1239 |
Basic earnings (loss) per ordinary share (US$) |
Concept (Share) |
For Period |
|
ifrs-full:BasicEarningsLossPerShare |
| 1240 |
Diluted loss per ordinary share computation |
Abstract |
|
|
ifrs-full:DilutedEarningsPerShareAbstract |
| 1241 |
Numerator:. |
Abstract |
|
|
gsm:NetIncomeLossDilutedNumeratorAbstract |
| 1242 |
Profit (loss) attributable to the Parent (US$'000) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:ProfitLossAttributableToOwnersOfParent |
| 1243 |
Denominator:. |
Abstract |
|
|
ifrs-full:WeightedAverageSharesAndAdjustedWeightedAverageSharesAbstract |
| 1244 |
Weighted average basic shares outstanding |
Concept (Shares) |
For Period |
|
ifrs-full:WeightedAverageShares |
| 1245 |
Effect of dilutive securities |
Concept (Shares) |
For Period |
|
gsm:DilutiveEffectOfSecuritiesOnWeightedAverageNumberOfOrdinarySharesOutstanding |
| 1246 |
Weighted average dilutive shares outstanding |
Concept (Shares) |
For Period |
|
ifrs-full:AdjustedWeightedAverageShares |
| 1247 |
Diluted earnings (loss) per ordinary share (US$) |
Concept (Share) |
For Period |
|
ifrs-full:DilutedEarningsLossPerShare |
| 1248 |
41402 - Disclosure - Earnings (loss) per ordinary share - Antidilutive (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureEarningsLossPerOrdinaryShareAntidilutiveDetails |
| 1249 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1250 |
Earnings per share [abstract] |
Abstract |
|
|
ifrs-full:EarningsPerShareAbstract |
| 1251 |
Potential ordinary shares excluded from calculation of diluted (loss) earnings per share because their effect would be anti-dilutive |
Concept (Shares) |
For Period |
|
gsm:IfrsAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount |
| 1252 |
41501 - Disclosure - Provisions (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureProvisionsDetails |
| 1253 |
Disclosure of other provisions [table] |
Table |
* |
* |
ifrs-full:DisclosureOfOtherProvisionsTable |
| 1254 |
Classes of other provisions [axis] |
Axis |
|
|
ifrs-full:ClassesOfProvisionsAxis |
| 1255 |
Provisions |
Member |
|
|
ifrs-full:OtherProvisionsMember |
| 1256 |
Provisions For Pensions [Member] |
Member |
|
|
gsm:ProvisionsForPensionsMember |
| 1257 |
Environment provision [member] |
Member |
|
|
ifrs-full:OtherEnvironmentRelatedProvisionMember |
| 1258 |
Provisions for litigation [member] |
Member |
|
|
ifrs-full:LegalProceedingsProvisionMember |
| 1259 |
Provisions for third-party liability [Member] |
Member |
|
|
gsm:ProvisionsForThirdPartyLiabilityMember |
| 1260 |
Provisions for C02 emissions allowances [Member] |
Member |
|
|
gsm:ProvisionsForCo2EmissionsAllowancesMember |
| 1261 |
Other provisions [member] |
Member |
|
|
ifrs-full:MiscellaneousOtherProvisionsMember |
| 1262 |
Environmental rehabilitation [member] |
Member |
|
|
gsm:EnvironmentalRehabilitationMember |
| 1263 |
Provisions for litigation - FerroPem France [member] |
Member |
|
|
gsm:ProvisionsForLitigationFerropemFranceMember |
| 1264 |
Other provisions, provisions for taxes [member] |
Member |
|
|
gsm:OtherProvisionsProvisionsForTaxesMember |
| 1265 |
Other provisions, other [member] |
Member |
|
|
gsm:OtherProvisionsOtherMember |
| 1266 |
Disclosure of other provisions [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfOtherProvisionsLineItems |
| 1267 |
Non-current provisions |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentProvisions |
| 1268 |
Current provisions |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentProvisions |
| 1269 |
Provisions |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Provisions |
| 1270 |
41502 - Disclosure - Provisions - Changes - (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureProvisionsChangesDetails |
| 1271 |
Disclosure of other provisions [table] |
Table |
* |
* |
ifrs-full:DisclosureOfOtherProvisionsTable |
| 1272 |
Classes of other provisions [axis] |
Axis |
|
|
ifrs-full:ClassesOfProvisionsAxis |
| 1273 |
Provisions |
Member |
|
|
ifrs-full:OtherProvisionsMember |
| 1274 |
Provisions For Pensions [Member] |
Member |
|
|
gsm:ProvisionsForPensionsMember |
| 1275 |
Environment provision [member] |
Member |
|
|
ifrs-full:OtherEnvironmentRelatedProvisionMember |
| 1276 |
Provisions for litigation [member] |
Member |
|
|
ifrs-full:LegalProceedingsProvisionMember |
| 1277 |
Provisions for third-party liability [Member] |
Member |
|
|
gsm:ProvisionsForThirdPartyLiabilityMember |
| 1278 |
Provisions for C02 emissions allowances [Member] |
Member |
|
|
gsm:ProvisionsForCo2EmissionsAllowancesMember |
| 1279 |
Other provisions [member] |
Member |
|
|
ifrs-full:MiscellaneousOtherProvisionsMember |
| 1280 |
Disclosure of other provisions [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfOtherProvisionsLineItems |
| 1281 |
Reconciliation of changes in other provisions [abstract] |
Abstract |
|
|
ifrs-full:ReconciliationOfChangesInOtherProvisionsAbstract |
| 1282 |
Balance at beginning of period |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Provisions |
| 1283 |
Charges for the year |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:AdditionalProvisionsOtherProvisions |
| 1284 |
Provisions reversed with a credit to income |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:UnusedProvisionReversedOtherProvisions |
| 1285 |
Incorporation to the scope of consolidation |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:AcquisitionsThroughBusinessCombinationsOtherProvisions |
| 1286 |
Amounts used |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProvisionUsedOtherProvisions |
| 1287 |
Provision against equity |
Concept (Monetary) |
For Period |
Debit |
gsm:ProvisionAgainstEquity |
| 1288 |
Transfers from/(to) other accounts |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions |
| 1289 |
Exchange differences and others |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions |
| 1290 |
Transfer from liabilities associated with assets held for sale |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:DecreaseThroughTransferToLiabilitiesIncludedInDisposalGroupsClassifiedAsHeldForSaleOtherProvisions |
| 1291 |
Additions from business combinations (see Note 5) |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:AcquisitionsThroughBusinessCombinationsOtherProvisions |
| 1292 |
Disposals from business divestitures |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:DecreaseThroughLossOfControlOfSubsidiaryOtherProvisions |
| 1293 |
Balance at end of period |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Provisions |
| 1294 |
41503 - Disclosure - Provisions - Employee obligations - France - (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureProvisionsEmployeeObligationsFranceDetails |
| 1295 |
Disclosure of net defined benefit liability (asset) [table] |
Table |
* |
* |
ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable |
| 1296 |
Subsidiaries [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInSubsidiariesAxis |
| 1297 |
Entity's total for subsidiaries [member] |
Member |
|
|
ifrs-full:EntitysTotalForSubsidiariesMember |
| 1298 |
Ferro Pem S A S [Member] |
Member |
|
|
gsm:FerroPemSASMember |
| 1299 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 1300 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 1301 |
France |
Member |
|
|
country:FR |
| 1302 |
Maturity [axis] |
Axis |
|
|
ifrs-full:MaturityAxis |
| 1303 |
Aggregated time bands [member] |
Member |
|
|
ifrs-full:AggregatedTimeBandsMember |
| 1304 |
Not later than one year |
Member |
|
|
ifrs-full:NotLaterThanOneYearMember |
| 1305 |
Later than one year and not later than two years |
Member |
|
|
ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember |
| 1306 |
Later than two years and not later than three years |
Member |
|
|
ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember |
| 1307 |
Later than three years and not later than four years |
Member |
|
|
ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember |
| 1308 |
Later than four years and not later than five years |
Member |
|
|
ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember |
| 1309 |
Later than five years and not later than ten years [member] |
Member |
|
|
ifrs-full:LaterThanFiveYearsAndNotLaterThanTenYearsMember |
| 1310 |
Net defined benefit liability (asset) [axis] |
Axis |
|
|
ifrs-full:NetDefinedBenefitLiabilityAssetAxis |
| 1311 |
Net defined benefit liability (asset) [member] |
Member |
|
|
ifrs-full:NetDefinedBenefitLiabilityAssetMember |
| 1312 |
Present value of defined benefit obligation [member] |
Member |
|
|
ifrs-full:PresentValueOfDefinedBenefitObligationMember |
| 1313 |
Disclosure of net defined benefit liability (asset) [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems |
| 1314 |
Changes in net defined benefit liability (asset) [abstract] |
Abstract |
|
|
ifrs-full:ChangesInNetDefinedBenefitLiabilityAssetAbstract |
| 1315 |
Obligations at beginning of year |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilityAssetOfDefinedBenefitPlans |
| 1316 |
Current service cost |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset |
| 1317 |
Borrowing costs |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset |
| 1318 |
Actuarial differences |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset |
| 1319 |
Benefits paid |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset |
| 1320 |
Exchange differences |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset |
| 1321 |
Obligations at end of year |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilityAssetOfDefinedBenefitPlans |
| 1322 |
Percentage change in cost of provision |
Concept (Pure) |
As Of |
|
gsm:PercentageOfReasonablePossibleChangeInCostOfProvision |
| 1323 |
Change in obligation |
Concept (Monetary) |
As Of |
Credit |
gsm:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleChangeInCostOfProvision |
| 1324 |
Estimated Future Benefit Payments [Abstract] |
Abstract |
|
|
gsm:EstimatedFutureBenefitPaymentsAbstract |
| 1325 |
Estimated future benefit payments |
Concept (Monetary) |
As Of |
Credit |
gsm:EstimatedFutureBenefitPaymentsFromDefinedBenefitPensionPlans |
| 1326 |
41504 - Disclosure - Provisions - Employee obligations - South Africa - (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureProvisionsEmployeeObligationsSouthAfricaDetails |
| 1327 |
Disclosure of defined benefit plans [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDefinedBenefitPlansTable |
| 1328 |
Net defined benefit liability (asset) [axis] |
Axis |
|
|
ifrs-full:NetDefinedBenefitLiabilityAssetAxis |
| 1329 |
Net defined benefit liability (asset) [member] |
Member |
|
|
ifrs-full:NetDefinedBenefitLiabilityAssetMember |
| 1330 |
Present value of defined benefit obligation [member] |
Member |
|
|
ifrs-full:PresentValueOfDefinedBenefitObligationMember |
| 1331 |
Plan assets [member] |
Member |
|
|
ifrs-full:PlanAssetsMember |
| 1332 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 1333 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 1334 |
South Africa |
Member |
|
|
country:ZA |
| 1335 |
Disclosure of defined benefit plans [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDefinedBenefitPlansLineItems |
| 1336 |
Changes in net defined benefit liability (asset) [abstract] |
Abstract |
|
|
ifrs-full:ChangesInNetDefinedBenefitLiabilityAssetAbstract |
| 1337 |
Obligations at beginning of year |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilityAssetOfDefinedBenefitPlans |
| 1338 |
Current service cost |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset |
| 1339 |
Borrowing costs |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset |
| 1340 |
Actuarial differences |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset |
| 1341 |
Benefits paid |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset |
| 1342 |
Exchange differences |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset |
| 1343 |
Obligations at end of year |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilityAssetOfDefinedBenefitPlans |
| 1344 |
Percentage change in cost of medical aid |
Concept (Pure) |
As Of |
|
gsm:PercentageOfReasonablyPossibleChangeInCostOfMedicalAid |
| 1345 |
Change in provision due to reasonably possible change in the cost of medical aid |
Concept (Monetary) |
As Of |
Credit |
gsm:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleChangeInCostOfMedicalAid |
| 1346 |
Disclosure of fair value of plan assets [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfFairValueOfPlanAssetsAbstract |
| 1347 |
Cash |
Concept (Percent) |
For Period |
|
gsm:CashAndCashEquivalentsAmountContributedToFairValueOfPlanAssetsAsPercentOfTotalDefinedBenefitPlanAssets |
| 1348 |
Equity |
Concept (Percent) |
For Period |
|
gsm:EquityInstrumentsAmountContributedToFairValueOfPlanAssetsAsPercentOfTotalDefinedBenefitPlanAssets |
| 1349 |
Bonds |
Concept (Percent) |
For Period |
|
gsm:BondsAmountContributedToFairValueOfPlanAssetsAsPercentOfTotalDefinedBenefitPlanAssets |
| 1350 |
Property |
Concept (Percent) |
For Period |
|
gsm:RealEstateAmountContributedToFairValueOfPlanAssetsAsPercentOfTotalDefinedBenefitPlanAssets |
| 1351 |
International |
Concept (Percent) |
For Period |
|
gsm:InternationalInvestmentsAmountContributedToFairValueOfPlanAssetsAsPercentOfTotalDefinedBenefitPlanAssets |
| 1352 |
Others |
Concept (Percent) |
For Period |
|
gsm:OtherAssetsAmountContributedToFairValueOfPlanAssetsAsPercentOfTotalDefinedBenefitPlanAssets |
| 1353 |
Total |
Concept (Percent) |
For Period |
|
gsm:DisclosureOfFairValueOfPlanAssetsAsPercentage |
| 1354 |
Ifrs Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |
Abstract |
|
|
gsm:IfrsDefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward |
| 1355 |
Fair value of plan assets at the beginning of the year |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PlanAssetsAtFairValue |
| 1356 |
Interest income on assets |
Concept (Monetary) |
For Period |
Debit |
gsm:DefinedBenefitPlanInterestIncomeOnPlanAssets |
| 1357 |
Benefits paid |
Concept (Monetary) |
For Period |
Debit |
gsm:IfrsDefinedBenefitPlanBenefitsPaid |
| 1358 |
Actuarial differences |
Concept (Monetary) |
For Period |
Debit |
gsm:IncreaseDecreaseInDefinedBenefitPlanAssetsDueToActuarialDifferences |
| 1359 |
Other |
Concept (Monetary) |
For Period |
Debit |
gsm:IncreaseDecreaseInDefinedBenefitPlanAssetsDueToOther |
| 1360 |
Fair value of plan assets at the end of the year |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PlanAssetsAtFairValue |
| 1361 |
Actual return on assets |
Concept (Monetary) |
For Period |
Debit |
gsm:IfrsDefinedBenefitPlanActualReturnOnPlanAssets |
| 1362 |
41505 - Disclosure - Provisions - Employee obligations - Venezuela - (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureProvisionsEmployeeObligationsVenezuelaDetails |
| 1363 |
Disclosure of defined benefit plans [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDefinedBenefitPlansTable |
| 1364 |
Net defined benefit liability (asset) [axis] |
Axis |
|
|
ifrs-full:NetDefinedBenefitLiabilityAssetAxis |
| 1365 |
Net defined benefit liability (asset) [member] |
Member |
|
|
ifrs-full:NetDefinedBenefitLiabilityAssetMember |
| 1366 |
Present value of defined benefit obligation [member] |
Member |
|
|
ifrs-full:PresentValueOfDefinedBenefitObligationMember |
| 1367 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 1368 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 1369 |
Venezuela |
Member |
|
|
country:VE |
| 1370 |
France |
Member |
|
|
country:FR |
| 1371 |
South Africa |
Member |
|
|
country:ZA |
| 1372 |
Subsidiaries [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInSubsidiariesAxis |
| 1373 |
Entity's total for subsidiaries [member] |
Member |
|
|
ifrs-full:EntitysTotalForSubsidiariesMember |
| 1374 |
FerroAtlantica De Venezuela SA |
Member |
|
|
gsm:FerroatlanticaDeVenezuelaSaMember |
| 1375 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 1376 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 1377 |
Minimum |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 1378 |
Maximum |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 1379 |
Disclosure of defined benefit plans [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDefinedBenefitPlansLineItems |
| 1380 |
Years of service |
Concept (xbrli:durationItemType) |
For Period |
|
gsm:NumberOfYearsOfEmployeeServiceAccumulated |
| 1381 |
Percentage of basic salary guaranteed by IVSS |
Concept (Pure) |
For Period |
|
gsm:PercentageOfBasicSalaryPaymentGuaranteed |
| 1382 |
Changes in net defined benefit liability (asset) [abstract] |
Abstract |
|
|
ifrs-full:ChangesInNetDefinedBenefitLiabilityAssetAbstract |
| 1383 |
Obligations at beginning of year |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilityAssetOfDefinedBenefitPlans |
| 1384 |
Current service cost |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset |
| 1385 |
Borrowing costs |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset |
| 1386 |
Actuarial differences |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset |
| 1387 |
Benefits paid |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset |
| 1388 |
Exchange differences |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset |
| 1389 |
Obligations at end of year |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilityAssetOfDefinedBenefitPlans |
| 1390 |
Actuarial Assumptions Used To Calculate Defined Benefit Obligation [Abstract] |
Abstract |
|
|
gsm:ActuarialAssumptionsUsedToCalculateDefinedBenefitObligationAbstract |
| 1391 |
Salary increase |
Concept (Percent) |
As Of |
|
ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases |
| 1392 |
Discount rate |
Concept (Percent) |
As Of |
|
ifrs-full:ActuarialAssumptionOfDiscountRates |
| 1393 |
Expected inflation rate |
Concept (Percent) |
As Of |
|
ifrs-full:ActuarialAssumptionOfExpectedRatesOfInflation |
| 1394 |
Retirement age |
Concept (Decimal) |
As Of |
|
ifrs-full:ActuarialAssumptionOfRetirementAge |
| 1395 |
41506 - Disclosure - Provisions - Employee obligations - North America - Provisions- (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureProvisionsEmployeeObligationsNorthAmericaProvisionsDetails |
| 1396 |
Disclosure of defined benefit plans [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDefinedBenefitPlansTable |
| 1397 |
Subsidiaries [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInSubsidiariesAxis |
| 1398 |
Entity's total for subsidiaries [member] |
Member |
|
|
ifrs-full:EntitysTotalForSubsidiariesMember |
| 1399 |
Globe Metallurgical Inc [Member] |
Member |
|
|
gsm:GlobeMetallurgicalIncMember |
| 1400 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 1401 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 1402 |
North America |
Member |
|
|
srt:NorthAmericaMember |
| 1403 |
USA |
Member |
|
|
country:US |
| 1404 |
CANADA |
Member |
|
|
country:CA |
| 1405 |
Defined benefit plans [axis] |
Axis |
|
|
ifrs-full:DefinedBenefitPlansAxis |
| 1406 |
Defined benefit plans [member] |
Member |
|
|
ifrs-full:DefinedBenefitPlansMember |
| 1407 |
Pension Plans |
Member |
|
|
ifrs-full:DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember |
| 1408 |
Post Retirement Plans |
Member |
|
|
gsm:PostRetirementPlansMember |
| 1409 |
Non Contributory Plans [Member] |
Member |
|
|
gsm:NonContributoryPlansMember |
| 1410 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 1411 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 1412 |
Minimum |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 1413 |
Maximum |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 1414 |
Maturity [axis] |
Axis |
|
|
ifrs-full:MaturityAxis |
| 1415 |
Aggregated time bands [member] |
Member |
|
|
ifrs-full:AggregatedTimeBandsMember |
| 1416 |
Not later than one year |
Member |
|
|
ifrs-full:NotLaterThanOneYearMember |
| 1417 |
Later than one year and not later than two years |
Member |
|
|
ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember |
| 1418 |
Later than two years and not later than three years |
Member |
|
|
ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember |
| 1419 |
Later than three years and not later than four years |
Member |
|
|
ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember |
| 1420 |
Later than four years and not later than five years |
Member |
|
|
ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember |
| 1421 |
Later than five years and not later than ten years [member] |
Member |
|
|
ifrs-full:LaterThanFiveYearsAndNotLaterThanTenYearsMember |
| 1422 |
Later Than Sixteen Years And Not Later Than Seventeen Years [Member] |
Member |
|
|
gsm:LaterThanSixteenYearsAndNotLaterThanSeventeenYearsMember |
| 1423 |
Actuarial assumptions [axis] |
Axis |
|
|
ifrs-full:ActuarialAssumptionsAxis |
| 1424 |
Actuarial assumptions [member] |
Member |
|
|
ifrs-full:ActuarialAssumptionsMember |
| 1425 |
Actuarial assumption of medical cost trend rates [member] |
Member |
|
|
ifrs-full:ActuarialAssumptionOfMedicalCostTrendRatesMember |
| 1426 |
Disclosure of defined benefit plans [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDefinedBenefitPlansLineItems |
| 1427 |
Number of defined benefit plans sponsored |
Concept (Integer) |
For Period |
|
gsm:NumberOfDefinedBenefitPlans |
| 1428 |
Reconciliation Of Benefit Obligation Plan Assets And Funded Status [Abstract] |
Abstract |
|
|
gsm:ReconciliationOfBenefitObligationPlanAssetsAndFundedStatusAbstract |
| 1429 |
Benefit obligation |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilityAssetOfDefinedBenefitPlans |
| 1430 |
Fair value of plan assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PlanAssetsAtFairValue |
| 1431 |
Provision for pensions |
Concept (Monetary) |
As Of |
Credit |
gsm:IfrsPostEmploymentBenefitsLiability |
| 1432 |
Actuarial Assumptions Used To Calculate Defined Benefit Obligation [Abstract] |
Abstract |
|
|
gsm:ActuarialAssumptionsUsedToCalculateDefinedBenefitObligationAbstract |
| 1433 |
Salary increase |
Concept (Percent) |
As Of |
|
ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases |
| 1434 |
Discount rate |
Concept (Percent) |
As Of |
|
ifrs-full:ActuarialAssumptionOfDiscountRates |
| 1435 |
Retirement age |
Concept (Decimal) |
As Of |
|
ifrs-full:ActuarialAssumptionOfRetirementAge |
| 1436 |
Discretionary contributions to the defined benefit pension and postretirement plans |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:EstimateOfContributionsExpectedToBePaidToPlan |
| 1437 |
Estimated Future Benefit Payments [Abstract] |
Abstract |
|
|
gsm:EstimatedFutureBenefitPaymentsAbstract |
| 1438 |
Estimated future benefit payments |
Concept (Monetary) |
As Of |
Credit |
gsm:EstimatedFutureBenefitPaymentsFromDefinedBenefitPensionPlans |
| 1439 |
Health care cost trend rate |
Concept (Percent) |
As Of |
|
ifrs-full:ActuarialAssumptionOfMedicalCostTrendRates |
| 1440 |
Percentage of reasonably possible increase in actuarial assumption |
Concept (Percent) |
As Of |
|
ifrs-full:PercentageOfReasonablyPossibleIncreaseInActuarialAssumption |
| 1441 |
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption |
| 1442 |
Percentage of reasonably possible decrease in actuarial assumption |
Concept (Percent) |
As Of |
|
ifrs-full:PercentageOfReasonablyPossibleDecreaseInActuarialAssumption |
| 1443 |
Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption |
| 1444 |
41507 - Disclosure - Provisions - Employee obligations - North America plan assets (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureProvisionsEmployeeObligationsNorthAmericaPlanAssetsDetails |
| 1445 |
Disclosure of defined benefit plans [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDefinedBenefitPlansTable |
| 1446 |
Net defined benefit liability (asset) [axis] |
Axis |
|
|
ifrs-full:NetDefinedBenefitLiabilityAssetAxis |
| 1447 |
Net defined benefit liability (asset) [member] |
Member |
|
|
ifrs-full:NetDefinedBenefitLiabilityAssetMember |
| 1448 |
Present value of defined benefit obligation [member] |
Member |
|
|
ifrs-full:PresentValueOfDefinedBenefitObligationMember |
| 1449 |
Plan assets [member] |
Member |
|
|
ifrs-full:PlanAssetsMember |
| 1450 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 1451 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 1452 |
North America |
Member |
|
|
srt:NorthAmericaMember |
| 1453 |
USA |
Member |
|
|
country:US |
| 1454 |
CANADA |
Member |
|
|
country:CA |
| 1455 |
Defined benefit plans [axis] |
Axis |
|
|
ifrs-full:DefinedBenefitPlansAxis |
| 1456 |
Defined benefit plans [member] |
Member |
|
|
ifrs-full:DefinedBenefitPlansMember |
| 1457 |
Pension Plans |
Member |
|
|
ifrs-full:DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember |
| 1458 |
Post Retirement Plans |
Member |
|
|
gsm:PostRetirementPlansMember |
| 1459 |
Disclosure of defined benefit plans [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDefinedBenefitPlansLineItems |
| 1460 |
Changes in net defined benefit liability (asset) [abstract] |
Abstract |
|
|
ifrs-full:ChangesInNetDefinedBenefitLiabilityAssetAbstract |
| 1461 |
Obligations at beginning of year |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilityAssetOfDefinedBenefitPlans |
| 1462 |
Service cost |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset |
| 1463 |
Borrowing costs |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset |
| 1464 |
Actuarial differences |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset |
| 1465 |
Benefits paid |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset |
| 1466 |
Exchange differences |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset |
| 1467 |
Plan amendments |
Concept (Monetary) |
For Period |
Credit |
gsm:IncreaseDecreaseThroughPlanAmendmentsNetDefinedBenefitLiabilityAsset |
| 1468 |
Expenses |
Concept (Monetary) |
For Period |
Debit |
gsm:DecreaseThroughExpensesInNetDefinedBenefitLiabilityAsset |
| 1469 |
Obligations at end of year |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilityAssetOfDefinedBenefitPlans |
| 1470 |
Disclosure of fair value of plan assets [abstract] |
Abstract |
|
|
ifrs-full:DisclosureOfFairValueOfPlanAssetsAbstract |
| 1471 |
Cash |
Concept (Percent) |
For Period |
|
gsm:CashAndCashEquivalentsAmountContributedToFairValueOfPlanAssetsAsPercentOfTotalDefinedBenefitPlanAssets |
| 1472 |
Equity mutual funds |
Concept (Percent) |
For Period |
|
gsm:EquityMutualFundsAmountContributedToFairValueOfPlanAssetsAsPercentOfTotalDefinedBenefitPlanAssets |
| 1473 |
Fixed income securities |
Concept (Percent) |
For Period |
|
gsm:FixedIncomeSecuritiesAmountContributedToFairValueOfPlanAssetsAsPercentOfTotalDefinedBenefitPlanAssets |
| 1474 |
Real estate mutual funds |
Concept (Percent) |
For Period |
|
gsm:RealEstateMutualFundsAmountContributedToFairValueOfPlanAssetsAsPercentOfTotalDefinedBenefitPlanAssets |
| 1475 |
Total |
Concept (Percent) |
For Period |
|
gsm:DisclosureOfFairValueOfPlanAssetsAsPercentage |
| 1476 |
Ifrs Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |
Abstract |
|
|
gsm:IfrsDefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward |
| 1477 |
Fair value of plan assets at the beginning of the year |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PlanAssetsAtFairValue |
| 1478 |
Interest income on assets |
Concept (Monetary) |
For Period |
Debit |
gsm:DefinedBenefitPlanInterestIncomeOnPlanAssets |
| 1479 |
Benefits paid |
Concept (Monetary) |
For Period |
Debit |
gsm:IfrsDefinedBenefitPlanBenefitsPaid |
| 1480 |
Actuarial return (loss) on plan assets |
Concept (Monetary) |
For Period |
Debit |
gsm:IncreaseDecreaseInDefinedBenefitPlanAssetsDueToActuarialDifferences |
| 1481 |
Other |
Concept (Monetary) |
For Period |
Debit |
gsm:IncreaseDecreaseInDefinedBenefitPlanAssetsDueToOther |
| 1482 |
Fair value of plan assets at the end of the year |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:PlanAssetsAtFairValue |
| 1483 |
41508 - Disclosure - Provisions - Other Benefit Plans (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureProvisionsOtherBenefitPlansDetails |
| 1484 |
Disclosure of defined benefit plans [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDefinedBenefitPlansTable |
| 1485 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 1486 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 1487 |
Maximum |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 1488 |
Subsidiaries [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInSubsidiariesAxis |
| 1489 |
Entity's total for subsidiaries [member] |
Member |
|
|
ifrs-full:EntitysTotalForSubsidiariesMember |
| 1490 |
Globe Metallurgical Inc [Member] |
Member |
|
|
gsm:GlobeMetallurgicalIncMember |
| 1491 |
Geographical areas [axis] |
Axis |
|
|
ifrs-full:GeographicalAreasAxis |
| 1492 |
Geographical areas [member] |
Member |
|
|
ifrs-full:GeographicalAreasMember |
| 1493 |
North America |
Member |
|
|
srt:NorthAmericaMember |
| 1494 |
Classes of contingent liabilities [axis] |
Axis |
|
|
ifrs-full:ClassesOfContingentLiabilitiesAxis |
| 1495 |
Contingent liabilities [member] |
Member |
|
|
ifrs-full:ContingentLiabilitiesMember |
| 1496 |
Contingent |
Member |
|
|
ifrs-full:LegalProceedingsContingentLiabilityMember |
| 1497 |
Asbestos-related claims |
Member |
|
|
gsm:LegalProceedingsAsbestosClaimsContingentLiabilityMember |
| 1498 |
Disclosure of defined benefit plans [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDefinedBenefitPlansLineItems |
| 1499 |
Other Benefit Plans [Abstract] |
Abstract |
|
|
gsm:OtherBenefitPlansAbstract |
| 1500 |
Company match percentage |
Concept (Pure) |
For Period |
|
gsm:IfrsDefinedContributionPlanEmployerMatchingContributionPercentOfMatch |
| 1501 |
Percentage of compensation |
Concept (Pure) |
For Period |
|
gsm:IfrsDefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent |
| 1502 |
Number of defined contribution plans provided |
Concept (Integer) |
For Period |
|
gsm:NumberOfDefinedContributionPlans |
| 1503 |
Other provisions [abstract] |
Abstract |
|
|
ifrs-full:OtherProvisionsAbstract |
| 1504 |
Provisions for litigation |
Concept (Monetary) |
For Period |
Credit |
gsm:ProvisionsForLitigationCurrent |
| 1505 |
Bond to guarantee civil financial responsibility |
Concept (Monetary) |
As Of |
Debit |
gsm:BondToGuaranteeCivilFinancialResponsibility |
| 1506 |
Litigation paid |
Concept (Monetary) |
For Period |
Credit |
gsm:PaymentOfLitigation |
| 1507 |
41601 - Disclosure - Bank borrowings - (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureBankBorrowingsDetails |
| 1508 |
Disclosure of detailed information about borrowings [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable |
| 1509 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 1510 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 1511 |
Credit facilities |
Member |
|
|
gsm:CreditFacilitiesMember |
| 1512 |
Other |
Member |
|
|
gsm:OtherBankBorrowingsMember |
| 1513 |
Revolving Credit Facility |
Member |
|
|
gsm:RevolvingLineOfCreditMember |
| 1514 |
Disclosure of detailed information about borrowings [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems |
| 1515 |
Borrowings [abstract] |
Abstract |
|
|
ifrs-full:BorrowingsAbstract |
| 1516 |
Principal amount |
Concept (Monetary) |
As Of |
|
ifrs-full:NotionalAmount |
| 1517 |
Non-Current Amount |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LongtermBorrowings |
| 1518 |
Current Amount |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ShorttermBorrowings |
| 1519 |
Borrowings, interest rate basis |
Concept (Text/String) |
For Period |
|
ifrs-full:BorrowingsInterestRateBasis |
| 1520 |
Principal amount |
Concept (Monetary) |
As Of |
Credit |
gsm:LongtermBorrowingsGross |
| 1521 |
Unamortised issuance costs |
Concept (Monetary) |
For Period |
Debit |
gsm:IfrsDeferredFinanceCostsNet |
| 1522 |
Accrued interest |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:InterestPayable |
| 1523 |
Total |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Borrowings |
| 1524 |
Amount due for settlement within 12 months |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings |
| 1525 |
Amount due for settlement after 12 months |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LongtermBorrowings |
| 1526 |
41602 - Disclosure - Bank borrowings - Amended Revolving Credit Facility - (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureBankBorrowingsAmendedRevolvingCreditFacilityDetails |
| 1527 |
Disclosure of detailed information about borrowings [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable |
| 1528 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 1529 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 1530 |
Amended revolving credit facility |
Member |
|
|
gsm:AmendedRevolvingCreditFacilityMember |
| 1531 |
New Revolving Credit Facility |
Member |
|
|
gsm:NewRevolvingCreditFacilityMember |
| 1532 |
Types of interest rates [axis] |
Axis |
|
|
ifrs-full:TypesOfInterestRatesAxis |
| 1533 |
Interest rate types [member] |
Member |
|
|
ifrs-full:InterestRateTypesMember |
| 1534 |
Floating rate |
Member |
|
|
ifrs-full:FloatingInterestRateMember |
| 1535 |
LIBOR |
Member |
|
|
gsm:IfrsLondonInterbankOfferedRateLiborMember |
| 1536 |
Base rate |
Member |
|
|
gsm:IfrsBaseRateMember |
| 1537 |
Eurocurrency Rate Basis |
Member |
|
|
gsm:EurocurrencyRateBasisMember |
| 1538 |
Fed Overnight Bank Funding Rate |
Member |
|
|
gsm:FedOvernightBankFundingRateMember |
| 1539 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 1540 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 1541 |
Minimum |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 1542 |
Disclosure of detailed information about borrowings [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems |
| 1543 |
Borrowings [abstract] |
Abstract |
|
|
ifrs-full:BorrowingsAbstract |
| 1544 |
Principal amount |
Concept (Monetary) |
As Of |
|
ifrs-full:NotionalAmount |
| 1545 |
Applicable margin (as a percent) |
Concept (Percent) |
As Of |
|
ifrs-full:BorrowingsAdjustmentToInterestRateBasis |
| 1546 |
Interest rate (as a percent) |
Concept (Percent) |
As Of |
|
ifrs-full:BorrowingsInterestRate |
| 1547 |
Borrowings |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Borrowings |
| 1548 |
Repaid |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities |
| 1549 |
Borrowings, interest rate basis |
Concept (Text/String) |
For Period |
|
ifrs-full:BorrowingsInterestRateBasis |
| 1550 |
41603 - Disclosure - Bank borrowings - Borrowing detail by currency - (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureBankBorrowingsBorrowingDetailByCurrencyDetails |
| 1551 |
Disclosure of detailed information about borrowings [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable |
| 1552 |
Currency [Axis] |
Axis |
|
|
srt:CurrencyAxis |
| 1553 |
All Currencies [Domain] |
Member |
|
|
currency:AllCurrenciesDomain |
| 1554 |
US Dollars |
Member |
|
|
currency:USD |
| 1555 |
Euros |
Member |
|
|
currency:EUR |
| 1556 |
Other |
Member |
|
|
gsm:CurrencyOtherThanUsdMember |
| 1557 |
Disclosure of detailed information about borrowings [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems |
| 1558 |
Borrowings [abstract] |
Abstract |
|
|
ifrs-full:BorrowingsAbstract |
| 1559 |
Non-Current Principal Amount |
Concept (Monetary) |
As Of |
Credit |
gsm:LongtermBorrowingsGross |
| 1560 |
Current Principal Amount |
Concept (Monetary) |
As Of |
Credit |
gsm:ShortTermBorrowingsGross |
| 1561 |
Total |
Concept (Monetary) |
As Of |
Credit |
gsm:BorrowingsGross |
| 1562 |
41604 - Disclosure - Bank borrowings - Borrowing detail by maturity - (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureBankBorrowingsBorrowingDetailByMaturityDetails |
| 1563 |
Disclosure of detailed information about borrowings [table] |
Table |
* |
* |
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable |
| 1564 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 1565 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 1566 |
Credit facilities |
Member |
|
|
gsm:CreditFacilitiesMember |
| 1567 |
Disclosure of detailed information about borrowings [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems |
| 1568 |
Borrowings [abstract] |
Abstract |
|
|
ifrs-full:BorrowingsAbstract |
| 1569 |
Non-Current Amount |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LongtermBorrowings |
| 1570 |
Average interest rate |
Concept (Percent) |
As Of |
|
ifrs-full:BorrowingsInterestRate |
| 1571 |
41701 - Disclosure - Leases (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureLeasesDetails |
| 1572 |
Disclosure of finance lease and operating lease by lessee [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeTable |
| 1573 |
Maturity [axis] |
Axis |
|
|
ifrs-full:MaturityAxis |
| 1574 |
Aggregated time bands [member] |
Member |
|
|
ifrs-full:AggregatedTimeBandsMember |
| 1575 |
Not later than one year |
Member |
|
|
ifrs-full:NotLaterThanOneYearMember |
| 1576 |
Later than one year and not later than two years |
Member |
|
|
ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember |
| 1577 |
Between one and five years |
Member |
|
|
ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember |
| 1578 |
Later than two years and not later than three years |
Member |
|
|
ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember |
| 1579 |
Later than three years and not later than four years |
Member |
|
|
ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember |
| 1580 |
Later than five years [member] |
Member |
|
|
ifrs-full:LaterThanFiveYearsMember |
| 1581 |
Classes of assets [axis] |
Axis |
|
|
ifrs-full:ClassesOfAssetsAxis |
| 1582 |
Assets [member] |
Member |
|
|
ifrs-full:ClassesOfAssetsMember |
| 1583 |
Hydroelectrical installations (including power lines and concessions) |
Member |
|
|
gsm:HydroelectricalInstallationsIncludingPowerLinesAndConcessionsMember |
| 1584 |
Other finance leases |
Member |
|
|
gsm:FinanceLeasesOtherThanHydroelectricalInstallationsPowerLinesAndConcessionsMember |
| 1585 |
Types of interest rates [axis] |
Axis |
|
|
ifrs-full:TypesOfInterestRatesAxis |
| 1586 |
Interest rate types [member] |
Member |
|
|
ifrs-full:InterestRateTypesMember |
| 1587 |
EURIBOR |
Member |
|
|
gsm:EuroInterbankOfferedRateEuriborMember |
| 1588 |
Disclosure of finance lease and operating lease by lessee [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems |
| 1589 |
Lease liabilities [abstract] |
Abstract |
|
|
ifrs-full:LeaseLiabilitiesAbstract |
| 1590 |
Non-current |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentFinanceLeaseLiabilities |
| 1591 |
Current |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentFinanceLeaseLiabilities |
| 1592 |
Total |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:FinanceLeaseLiabilities |
| 1593 |
Number of loan installments |
Concept (Integer) |
As Of |
|
gsm:NumberOfLoanInstallmentsPayable |
| 1594 |
Applicable margin (as a percent) |
Concept (Percent) |
As Of |
|
ifrs-full:BorrowingsAdjustmentToInterestRateBasis |
| 1595 |
Finance Leases [Abstract] |
Abstract |
|
|
gsm:FinanceLeasesAbstract |
| 1596 |
Minimum finance lease payments payable |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:MinimumFinanceLeasePaymentsPayable |
| 1597 |
Future finance charge on finance lease |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:FutureFinanceChargeOnFinanceLease |
| 1598 |
Minimum finance lease payments payable, at present value |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:MinimumFinanceLeasePaymentsPayableAtPresentValue |
| 1599 |
Operating Leases [Abstract] |
Abstract |
|
|
gsm:OperatingLeasesAbstract |
| 1600 |
Minimum Operating Lease Payments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease |
| 1601 |
41801 - Disclosure - Debt instruments (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureDebtInstrumentsDetails |
| 1602 |
Disclosure of detailed information about financial instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialInstrumentsTable |
| 1603 |
Categories of related parties [axis] |
Axis |
|
|
ifrs-full:CategoriesOfRelatedPartiesAxis |
| 1604 |
Entity's total for related parties [member] |
Member |
|
|
ifrs-full:EntitysTotalForRelatedPartiesMember |
| 1605 |
Grupo Villar Mir, S.A.U. |
Member |
|
|
gsm:GrupoVillarMirS.a.u.Member |
| 1606 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 1607 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 1608 |
Maximum |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 1609 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 1610 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 1611 |
Senior Notes due 2022 |
Member |
|
|
gsm:SeniorNotesDue2022Member |
| 1612 |
Senior Notes due 2022 issued by Ferroglobe PLC |
Member |
|
|
gsm:SeniorNotesDue2022IssuedByFerroglobePlcMember |
| 1613 |
Senior Notes due 2022 issued by Globe Specialty Metals, Inc |
Member |
|
|
gsm:SeniorNotesDue2022IssuedByGlobeSpecialtyMetalsIncMember |
| 1614 |
Disclosure of detailed information about financial instruments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialInstrumentsLineItems |
| 1615 |
Debt Instruments |
Abstract |
|
|
gsm:DebtInstrumentsInformationAbstract |
| 1616 |
Principal amount |
Concept (Monetary) |
As Of |
|
ifrs-full:NotionalAmount |
| 1617 |
Unamortised issuance costs |
Concept (Monetary) |
As Of |
Debit |
gsm:DeferredFinanceCosts |
| 1618 |
Accrued coupon interest |
Concept (Monetary) |
As Of |
Credit |
gsm:AccruedCouponInterestOnDebtInstruments |
| 1619 |
Issuance costs |
Concept (Monetary) |
For Period |
Debit |
gsm:IfrsDeferredFinanceCostsNet |
| 1620 |
Amount due for settlement within 12 months |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentDebtInstrumentsIssued |
| 1621 |
Amount due for settlement after 12 months |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentDebtInstrumentsIssued |
| 1622 |
Total debt instruments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DebtSecurities |
| 1623 |
Fixed Interest Rate |
Concept (Percent) |
As Of |
|
ifrs-full:BorrowingsInterestRate |
| 1624 |
Potential redemption of notes as a percentage of aggregate principal amount |
Concept (Percent) |
For Period |
|
gsm:IfrsDebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed |
| 1625 |
Redemption price of notes |
Concept (Percent) |
For Period |
|
gsm:IfrsDebtInstrumentRedemptionPricePercentage |
| 1626 |
Redemption price of notes at change of control |
Concept (Percent) |
For Period |
|
gsm:DebtInstrumentRedemptionPricePercentageAtChangeInControl |
| 1627 |
Ownership interest as a percentage |
Concept (Percent) |
For Period |
|
gsm:PercentageOfOwnershipInterestHeldByRelatedParty |
| 1628 |
Fair value of notes payable |
Concept (Monetary) |
As Of |
Credit |
gsm:IfrsNotesPayableFairValueDisclosure |
| 1629 |
41901 - Disclosure - Other financial Liabilities (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherFinancialLiabilitiesDetails |
| 1630 |
Disclosure of financial liabilities [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialLiabilitiesTable |
| 1631 |
Subsidiaries [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInSubsidiariesAxis |
| 1632 |
Entity's total for subsidiaries [member] |
Member |
|
|
ifrs-full:EntitysTotalForSubsidiariesMember |
| 1633 |
FerroAtlantica De Venezuela SA |
Member |
|
|
gsm:FerroatlanticaDeVenezuelaSaMember |
| 1634 |
Classes of financial instruments [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialInstrumentsAxis |
| 1635 |
Financial instruments, class [member] |
Member |
|
|
ifrs-full:ClassesOfFinancialInstrumentsMember |
| 1636 |
Financial Loans With Governments Agencies [Member] |
Member |
|
|
gsm:FinancialLoansWithGovernmentsAgenciesMember |
| 1637 |
Loan Number 1 [Member] |
Member |
|
|
gsm:LoanNumber1Member |
| 1638 |
Loan Number 2 [Member] |
Member |
|
|
gsm:LoanNumber2Member |
| 1639 |
Derivatives [member] |
Member |
|
|
ifrs-full:DerivativesMember |
| 1640 |
Disclosure of financial liabilities [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialLiabilitiesLineItems |
| 1641 |
Categories of financial liabilities [abstract] |
Abstract |
|
|
ifrs-full:CategoriesOfFinancialLiabilitiesAbstract |
| 1642 |
Non-Current |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherNoncurrentFinancialLiabilities |
| 1643 |
Current |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherCurrentFinancialLiabilities |
| 1644 |
Total |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherFinancialLiabilities |
| 1645 |
Financial Loans With Governments Agencies [Abstract] |
Abstract |
|
|
gsm:FinancialLoansWithGovernmentsAgenciesAbstract |
| 1646 |
Number of loan agreements |
Concept (Integer) |
As Of |
|
gsm:NumberOfLoanAgreementsEnteredInto |
| 1647 |
Loans received |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LoansReceived |
| 1648 |
Number of loan installments |
Concept (Integer) |
As Of |
|
gsm:NumberOfLoanInstallmentsPayable |
| 1649 |
Borrowings Term |
Concept (xbrli:durationItemType) |
For Period |
|
gsm:BorrowingsTerm |
| 1650 |
Grace period at start of loan |
Concept (xbrli:durationItemType) |
For Period |
|
gsm:BorrowingsTermGracePeriod |
| 1651 |
Interest rate (as a percent) |
Concept (Percent) |
As Of |
|
ifrs-full:BorrowingsInterestRate |
| 1652 |
Amortized cost |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:FinancialLiabilitiesAtAmortisedCost |
| 1653 |
41902 - Disclosure - Other financial Liabilities - Derivative financial instruments (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherFinancialLiabilitiesDerivativeFinancialInstrumentsDetails |
| 1654 |
Disclosure of financial liabilities [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialLiabilitiesTable |
| 1655 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 1656 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 1657 |
Senior Notes due 2022 issued by Ferroglobe PLC |
Member |
|
|
gsm:SeniorNotesDue2022IssuedByFerroglobePlcMember |
| 1658 |
Maturity [axis] |
Axis |
|
|
ifrs-full:MaturityAxis |
| 1659 |
Aggregated time bands [member] |
Member |
|
|
ifrs-full:AggregatedTimeBandsMember |
| 1660 |
Later Than Six Years And Not Later Seven Years [Member] |
Member |
|
|
gsm:LaterThanSixYearsAndNotLaterSevenYearsMember |
| 1661 |
Hedging instruments [axis] |
Axis |
|
|
ifrs-full:HedgingInstrumentsAxis |
| 1662 |
Hedging instruments |
Member |
|
|
ifrs-full:HedgingInstrumentsMember |
| 1663 |
Derivatives designated as hedging instruments |
Member |
|
|
gsm:IfrsDesignatedAsHedgingInstrumentMember |
| 1664 |
Derivatives not designated as hedging instruments |
Member |
|
|
gsm:IfrsNondesignatedMember |
| 1665 |
Types of hedges [axis] |
Axis |
|
|
ifrs-full:TypesOfHedgesAxis |
| 1666 |
Hedges [member] |
Member |
|
|
ifrs-full:TypesOfHedgesMember |
| 1667 |
Cash flow hedges [member] |
Member |
|
|
ifrs-full:CashFlowHedgesMember |
| 1668 |
Classes of financial instruments [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialInstrumentsAxis |
| 1669 |
Financial instruments, class [member] |
Member |
|
|
ifrs-full:ClassesOfFinancialInstrumentsMember |
| 1670 |
Derivatives [member] |
Member |
|
|
ifrs-full:DerivativesMember |
| 1671 |
Cross currency swap |
Member |
|
|
ifrs-full:CurrencySwapContractMember |
| 1672 |
Interest rate swap contract [member] |
Member |
|
|
ifrs-full:InterestRateSwapContractMember |
| 1673 |
IFRS Income Statement Location Axis |
Axis |
|
|
gsm:IfrsIncomeStatementLocationAxis |
| 1674 |
IFRS Income Statement Location [Domain] |
Member |
|
|
gsm:IfrsIncomeStatementLocationDomain |
| 1675 |
Exchange differences |
Member |
|
|
gsm:IfrsForeignCurrencyGainLossMember |
| 1676 |
Finance costs |
Member |
|
|
gsm:FinanceExpenseMember |
| 1677 |
Types of interest rates [axis] |
Axis |
|
|
ifrs-full:TypesOfInterestRatesAxis |
| 1678 |
Interest rate types [member] |
Member |
|
|
ifrs-full:InterestRateTypesMember |
| 1679 |
Fixed rate |
Member |
|
|
ifrs-full:FixedInterestRateMember |
| 1680 |
Disclosure of financial liabilities [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialLiabilitiesLineItems |
| 1681 |
Other financial liabilities |
Abstract |
|
|
ifrs-full:CategoriesOfFinancialLiabilitiesAbstract |
| 1682 |
Nominal Amount |
Concept (Monetary) |
As Of |
|
ifrs-full:NotionalAmount |
| 1683 |
Reference Floating Interest Rate |
Concept (Text/String) |
For Period |
|
ifrs-full:BorrowingsInterestRateBasis |
| 1684 |
Market value |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:FinancialLiabilitiesAtFairValue |
| 1685 |
Foreign Currency Swaps |
Abstract |
|
|
gsm:ForeignCurrencySwapsForwardsAbstract |
| 1686 |
Interest receivable (as a percent) |
Concept (Percent) |
For Period |
|
gsm:InterestIncomeFixedRate |
| 1687 |
Fixed Interest Rate |
Concept (Percent) |
As Of |
|
ifrs-full:BorrowingsInterestRate |
| 1688 |
Gain (loss) on ineffective hedge recognized in other comprehensive income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainLossOnHedgeIneffectivenessRecognisedInOtherComprehensiveIncome |
| 1689 |
Gain (loss) on change in fair value of hedged item used as basis for recognising hedge ineffectiveness |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainLossOnChangeInFairValueOfHedgedItemUsedAsBasisForRecognisingHedgeIneffectiveness |
| 1690 |
Gain (loss) transferred from valuation adjustment reserve to income statement |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:CumulativeGainLossPreviouslyRecognisedInOtherComprehensiveIncomeArisingFromReclassificationOfFinancialAssetsOutOfFairValueThroughOtherComprehensiveIncomeIntoFairValueThroughProfitOrLossMeasurementCategory |
| 1691 |
Balance of CCS remained in the valuation adjustment reserve |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ReserveOfCashFlowHedges |
| 1692 |
Income (Expense) recorded in financial derivative loss |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:TradingIncomeExpenseOnDerivativeFinancialInstruments |
| 1693 |
41903 - Disclosure - Other financial Liabilities - Interest rate swaps (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherFinancialLiabilitiesInterestRateSwapsDetails |
| 1694 |
Disclosure of financial liabilities [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialLiabilitiesTable |
| 1695 |
Maturity [axis] |
Axis |
|
|
ifrs-full:MaturityAxis |
| 1696 |
Aggregated time bands [member] |
Member |
|
|
ifrs-full:AggregatedTimeBandsMember |
| 1697 |
Later Than Six Years And Not Later Seven Years [Member] |
Member |
|
|
gsm:LaterThanSixYearsAndNotLaterSevenYearsMember |
| 1698 |
Classes of financial instruments [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialInstrumentsAxis |
| 1699 |
Financial instruments, class [member] |
Member |
|
|
ifrs-full:ClassesOfFinancialInstrumentsMember |
| 1700 |
Derivatives [member] |
Member |
|
|
ifrs-full:DerivativesMember |
| 1701 |
Interest rate swap contract [member] |
Member |
|
|
ifrs-full:InterestRateSwapContractMember |
| 1702 |
Lease Of Hydroelectrical Installations [Member] |
Member |
|
|
gsm:LeaseOfHydroelectricalInstallationsMember |
| 1703 |
Types of interest rates [axis] |
Axis |
|
|
ifrs-full:TypesOfInterestRatesAxis |
| 1704 |
Interest rate types [member] |
Member |
|
|
ifrs-full:InterestRateTypesMember |
| 1705 |
Fixed rate |
Member |
|
|
ifrs-full:FixedInterestRateMember |
| 1706 |
Disclosure of financial liabilities [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialLiabilitiesLineItems |
| 1707 |
Other financial liabilities |
Abstract |
|
|
ifrs-full:CategoriesOfFinancialLiabilitiesAbstract |
| 1708 |
Valuation adjustments reserve related to hedging relationship for which hedge accounting no longer applied |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ReserveOfCashFlowHedgesHedgingRelationshipsForWhichHedgeAccountingIsNoLongerApplied |
| 1709 |
Nominal Amount |
Concept (Monetary) |
As Of |
|
ifrs-full:NotionalAmount |
| 1710 |
Fixed Interest Rate |
Concept (Percent) |
As Of |
|
ifrs-full:BorrowingsInterestRate |
| 1711 |
Reference Floating Interest Rate |
Concept (Text/String) |
For Period |
|
ifrs-full:BorrowingsInterestRateBasis |
| 1712 |
Market value |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:FinancialLiabilitiesAtFairValue |
| 1713 |
42001 - Disclosure - Trade and other payables (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureTradeAndOtherPayablesDetails |
| 1714 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1715 |
Trade and other payables. |
Abstract |
|
|
ifrs-full:TradeAndOtherPayablesAbstract |
| 1716 |
Payable to suppliers |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:TradeAndOtherPayablesToTradeSuppliers |
| 1717 |
Trade notes and bills payable |
Concept (Monetary) |
As Of |
Credit |
gsm:TradeNotesAndBillsPayable |
| 1718 |
Total |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:TradeAndOtherPayables |
| 1719 |
42101 - Disclosure - Other liabilities - Other Current and Non-current Liabilities (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherLiabilitiesOtherCurrentAndNonCurrentLiabilitiesDetails |
| 1720 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1721 |
Other liabilities |
Abstract |
|
|
gsm:IfrsOtherLiabilitiesAbstract |
| 1722 |
Payable to non-current asset suppliers - Non-Current |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NoncurrentPayablesForPurchaseOfNoncurrentAssets |
| 1723 |
Payable to non-current asset suppliers - Current |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentPayablesForPurchaseOfNoncurrentAssets |
| 1724 |
Payable to non-current asset suppliers |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:PayablesForPurchaseOfNoncurrentAssets |
| 1725 |
Guarantees and deposits - non-current |
Concept (Monetary) |
As Of |
Credit |
gsm:GuaranteesAndDepositsNonCurrent |
| 1726 |
Guarantees and deposits - current |
Concept (Monetary) |
As Of |
Credit |
gsm:GuaranteesAndDepositsCurrent |
| 1727 |
Guarantees and deposits |
Concept (Monetary) |
As Of |
Credit |
gsm:GuaranteesAndDepositsLiability |
| 1728 |
Remuneration payable - Non- current |
Concept (Monetary) |
As Of |
Credit |
gsm:RemunerationPayableNonCurrent |
| 1729 |
Remuneration payable - current |
Concept (Monetary) |
As Of |
Credit |
gsm:RemunerationPayableCurrent |
| 1730 |
Remuneration payable |
Concept (Monetary) |
As Of |
Credit |
gsm:RemunerationPayable |
| 1731 |
Tax payables - non-current |
Concept (Monetary) |
As Of |
Credit |
gsm:TaxPayablesNoncurrent |
| 1732 |
Tax payables - current |
Concept (Monetary) |
As Of |
Credit |
gsm:TaxPayablesCurrent |
| 1733 |
Total tax payables |
Concept (Monetary) |
As Of |
Credit |
gsm:TaxPayables |
| 1734 |
Contingent consideration - non -current |
Concept (Monetary) |
As Of |
Credit |
gsm:ContingentConsiderationNonCurrent |
| 1735 |
Contingent consideration - current |
Concept (Monetary) |
As Of |
Credit |
gsm:ContingentConsiderationCurrent |
| 1736 |
Contingent consideration |
Concept (Monetary) |
As Of |
Credit |
gsm:ContingentConsiderationCurrentAndNonCurrent |
| 1737 |
Other liabilities - non-current |
Concept (Monetary) |
As Of |
Credit |
gsm:MiscellaneousOtherLiabilitiesNonCurrent |
| 1738 |
Other liabilities - current |
Concept (Monetary) |
As Of |
Credit |
gsm:MiscellaneousOtherLiabilitiesCurrent |
| 1739 |
Other liabilities |
Concept (Monetary) |
As Of |
Credit |
gsm:MiscellaneousOtherLiabilities |
| 1740 |
Total other non current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherNoncurrentLiabilities |
| 1741 |
Total other current liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherCurrentLiabilities |
| 1742 |
Total other liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherLiabilities |
| 1743 |
42102 - Disclosure - Other liabilities - Tax Payables and Other Liabilities (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherLiabilitiesTaxPayablesAndOtherLiabilitiesDetails |
| 1744 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1745 |
Other liabilities |
Abstract |
|
|
gsm:IfrsOtherLiabilitiesAbstract |
| 1746 |
VAT, current |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentValueAddedTaxPayables |
| 1747 |
VAT |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ValueAddedTaxPayables |
| 1748 |
Accrued social security taxes payable, current |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax |
| 1749 |
Accrued social security taxes payable |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:PayablesOnSocialSecurityAndTaxesOtherThanIncomeTax |
| 1750 |
Personal income tax withholding payable, current |
Concept (Monetary) |
As Of |
Credit |
gsm:CurrentPayablesOnPersonalIncomeTaxWithholding |
| 1751 |
Personal income tax withholding payable |
Concept (Monetary) |
As Of |
Credit |
gsm:PayablesOnPersonalIncomeTaxWithholding |
| 1752 |
Other tax payables, non current |
Concept (Monetary) |
As Of |
Credit |
gsm:NonCurrentOtherTaxesPayable |
| 1753 |
Other tax payables, current |
Concept (Monetary) |
As Of |
Credit |
gsm:CurrentOtherTaxesPayable |
| 1754 |
Other tax payables |
Concept (Monetary) |
As Of |
Credit |
gsm:OtherTaxesPayable |
| 1755 |
Total non-current tax payables |
Concept (Monetary) |
As Of |
Credit |
gsm:TaxPayablesNoncurrent |
| 1756 |
Total current tax payables |
Concept (Monetary) |
As Of |
Credit |
gsm:TaxPayablesCurrent |
| 1757 |
Total tax payables |
Concept (Monetary) |
As Of |
Credit |
gsm:TaxPayables |
| 1758 |
Term Of Service Condition |
Concept (xbrli:durationItemType) |
For Period |
|
gsm:TermOfServiceCondition |
| 1759 |
42103 - Disclosure - Other liabilities - Stock Options (Detail) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherLiabilitiesStockOptionsDetail |
| 1760 |
Disclosure of terms and conditions of share-based payment arrangement [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable |
| 1761 |
Types of share-based payment arrangements [axis] |
Axis |
|
|
ifrs-full:TypesOfSharebasedPaymentArrangementsAxis |
| 1762 |
Share-based payment arrangements [member] |
Member |
|
|
ifrs-full:SharebasedPaymentArrangementsMember |
| 1763 |
Ferroglobe PLC Equity Incentive Plan [Member] |
Member |
|
|
gsm:FerroglobePlcEquityIncentivePlanMember |
| 1764 |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems |
| 1765 |
Outstanding at beginning of the period |
Concept (Decimal) |
As Of |
|
ifrs-full:NumberOfOutstandingShareOptions |
| 1766 |
Granted during the period |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement |
| 1767 |
Exercised during the period |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement |
| 1768 |
Expired/forfeited during the period |
Concept (Shares) |
For Period |
|
gsm:NumberOfShareOptionsExpiredOrForfeitedInShareBasedPaymentArrangement |
| 1769 |
Outstanding at end of the period |
Concept (Decimal) |
As Of |
|
ifrs-full:NumberOfOutstandingShareOptions |
| 1770 |
Exercisable as of December 31, 2018 and December 31, 2017 |
Concept (Decimal) |
As Of |
|
ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement |
| 1771 |
42104 - Disclosure - Other liabilities - Share-based payment arrangements (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherLiabilitiesShareBasedPaymentArrangementsDetails |
| 1772 |
Disclosure of terms and conditions of share-based payment arrangement [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable |
| 1773 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 1774 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 1775 |
Minimum |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 1776 |
Maximum |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 1777 |
Types of share-based payment arrangements [axis] |
Axis |
|
|
ifrs-full:TypesOfSharebasedPaymentArrangementsAxis |
| 1778 |
Share-based payment arrangements [member] |
Member |
|
|
ifrs-full:SharebasedPaymentArrangementsMember |
| 1779 |
Employee stock option |
Member |
|
|
gsm:IfrsEmployeeStockOptionMember |
| 1780 |
Equity incentive plan |
Member |
|
|
gsm:EquityIncentivePlanMember |
| 1781 |
Share-based payment arrangements, Grant date [Axis] |
Axis |
|
|
gsm:ShareBasedPaymentArrangementsGrantDateAxis |
| 1782 |
Share-based payment arrangements, Grant date [member] |
Member |
|
|
gsm:ShareBasedPaymentArrangementsGrantDateMember |
| 1783 |
Grant date of June 14, 2018 |
Member |
|
|
gsm:GrantDate1Member |
| 1784 |
Grant date of March 21, 2018 |
Member |
|
|
gsm:GrantDate2Member |
| 1785 |
Grant date of June 1, 2017 |
Member |
|
|
gsm:GrantDate3Member |
| 1786 |
Grant date of June 20, 2017 |
Member |
|
|
gsm:GrantDate4Member |
| 1787 |
Grant date of November 24, 2016 |
Member |
|
|
gsm:GrantDate5Member |
| 1788 |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems |
| 1789 |
Number of instruments granted |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfInstrumentsGrantedInSharebasedPaymentArrangement |
| 1790 |
Exercise price |
Concept (Monetary) |
For Period |
|
ifrs-full:ExercisePriceShareOptionsGranted |
| 1791 |
Grant date share price |
Concept (Monetary) |
For Period |
|
ifrs-full:WeightedAverageSharePriceShareOptionsGranted |
| 1792 |
Shares subject to performance conditions Outstanding |
Concept (Shares) |
For Period |
|
gsm:ShareBasedPaymentArrangementSharesSubjectToPerformanceConditionsOutstanding |
| 1793 |
Options receivable by participant depending on financial performance of the Company, as a percent |
Concept (Percent) |
For Period |
|
gsm:ShareBasedPaymentsOptionsReceivableBasedOnCompanyPerformanceAsPercentage |
| 1794 |
Service condition |
Concept (xbrli:durationItemType) |
For Period |
|
gsm:TermOfServiceCondition |
| 1795 |
Number of options with no performance obligations |
Concept (Integer) |
For Period |
|
gsm:NumberOfOptionsWithNoPerformanceObligations |
| 1796 |
Percentage of total shareholder return (“TSR”) relative to a comparator group, vesting condition |
Concept (Percent) |
As Of |
|
gsm:PercentageOfTotalShareholderReturnRelativeToComparatorGroupVestingCondition |
| 1797 |
Percentage of TSR relative to S&P Global 1200 Metals and Mining Index, vesting condition |
Concept (Percent) |
As Of |
|
gsm:PercentageOfTotalShareholderReturnRelativeToMetalAndMiningIndex |
| 1798 |
Percentage of return on invested capital, vesting condition |
Concept (Percent) |
As Of |
|
gsm:PercentageOfTotalShareholderReturnOnInvestedCapitalVestingCondition |
| 1799 |
Percentage of net operating profit after tax, vesting condition |
Concept (Percent) |
As Of |
|
gsm:PercentageOfNetOperatingProfitAfterTaxVestingCondition |
| 1800 |
Weighted average fair value of share options granted |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:WeightedAverageFairValueAtMeasurementDateShareOptionsGranted |
| 1801 |
Expected volatility |
Concept (Percent) |
For Period |
|
ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted |
| 1802 |
Option life |
Concept (Decimal) |
For Period |
|
ifrs-full:DescriptionOfOptionLifeShareOptionsGranted |
| 1803 |
Risk-free interest rate |
Concept (Percent) |
For Period |
|
ifrs-full:DescriptionOfRiskFreeInterestRateShareOptionsGranted |
| 1804 |
Performance period remaining at grant date |
Concept (xbrli:durationItemType) |
For Period |
|
gsm:PerformancePeriodRemainingAtGrantDate |
| 1805 |
Company TSR at grant date |
Concept (Percent) |
For Period |
|
gsm:CompanyTotalShareholderReturnAtGrantDate |
| 1806 |
Median comparator group TSR at grant date |
Concept (Percent) |
For Period |
|
gsm:MedianComparatorGroupTotalShareholderReturnAtGrantDate |
| 1807 |
Median index TSR at grant date |
Concept (Percent) |
For Period |
|
gsm:MedianIndexTotalShareholdersReturnAtGrantDate |
| 1808 |
TSR correlation considered significant |
Concept (Percent) |
As Of |
|
gsm:PercentageOfCorrelationConsideredForIncorporatedInToValuationModel |
| 1809 |
Share options exercised |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement |
| 1810 |
Share based compensation expense |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees |
| 1811 |
Weighted average remaining contractual life of outstanding share options |
Concept (Decimal) |
As Of |
|
ifrs-full:WeightedAverageRemainingContractualLifeOfOutstandingShareOptions |
| 1812 |
42105 - Disclosure - Other liabilities - Options under Business Combination (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherLiabilitiesOptionsUnderBusinessCombinationDetails |
| 1813 |
Disclosure of terms and conditions of share-based payment arrangement [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable |
| 1814 |
Types of share-based payment arrangements [axis] |
Axis |
|
|
ifrs-full:TypesOfSharebasedPaymentArrangementsAxis |
| 1815 |
Share-based payment arrangements [member] |
Member |
|
|
ifrs-full:SharebasedPaymentArrangementsMember |
| 1816 |
Ferroglobe Stock Option Replacement Awards |
Member |
|
|
gsm:FerroglobeStockOptionReplacementAwardsMember |
| 1817 |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems |
| 1818 |
Number of shares exchanged upon business combination |
Concept (Shares) |
As Of |
|
gsm:NumberOfSharesExchangedUponBusinessCombination |
| 1819 |
Options granted |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement |
| 1820 |
Share options exercised |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement |
| 1821 |
Outstanding at beginning of the period |
Concept (Decimal) |
As Of |
|
ifrs-full:NumberOfOutstandingShareOptions |
| 1822 |
Exercised during the period |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement |
| 1823 |
Cancelled in lieu of cash settlement |
Concept (Shares) |
For Period |
|
gsm:NumberOfShareOptionsCanceledInLieuOfCashSettlementInShareBasedPaymentArrangement |
| 1824 |
Expired/forfeited during the period |
Concept (Shares) |
For Period |
|
gsm:NumberOfShareOptionsExpiredOrForfeitedInShareBasedPaymentArrangement |
| 1825 |
Expired |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfShareOptionsExpiredInSharebasedPaymentArrangement |
| 1826 |
Outstanding at end of the period |
Concept (Decimal) |
As Of |
|
ifrs-full:NumberOfOutstandingShareOptions |
| 1827 |
Exercisable |
Concept (Decimal) |
As Of |
|
ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement |
| 1828 |
Weighted average exercise price at the beginning of the period |
Concept (Monetary) |
As Of |
|
ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement |
| 1829 |
Weighted average exercise price, exercised |
Concept (Monetary) |
For Period |
|
ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement |
| 1830 |
Weighted average exercise price, expired/forfeited |
Concept (Monetary) |
For Period |
|
ifrs-full:WeightedAverageExercisePriceOfShareOptionsExpiredInSharebasedPaymentArrangement |
| 1831 |
Weighted average exercise price of cancelled in lieu of cash settlement |
Concept (Monetary) |
For Period |
|
gsm:WeightedAverageExercisePriceOptionsCanceledInLieuOfCashSettlementInShareBasedPaymentArrangement |
| 1832 |
Weighted average exercise price at the end of the period |
Concept (Monetary) |
As Of |
|
ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement |
| 1833 |
Weighted average exercise price of share options exercisable in share-based payment arrangement |
Concept (Monetary) |
As Of |
|
ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement |
| 1834 |
Weighted average remaining contractual term, outstanding |
Concept (Decimal) |
As Of |
|
ifrs-full:WeightedAverageRemainingContractualLifeOfOutstandingShareOptions |
| 1835 |
Weighted average remaining contractual term, exercisable |
Concept (Decimal) |
For Period |
|
gsm:IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1 |
| 1836 |
Aggregate intrinsic value of options outstanding |
Concept (Monetary) |
As Of |
Debit |
gsm:IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue |
| 1837 |
Risk-free interest rate |
Concept (Percent) |
For Period |
|
ifrs-full:DescriptionOfRiskFreeInterestRateShareOptionsGranted |
| 1838 |
Expected volatility |
Concept (Percent) |
For Period |
|
ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted |
| 1839 |
Expected term (years) |
Concept (Decimal) |
For Period |
|
ifrs-full:DescriptionOfOptionLifeShareOptionsGranted |
| 1840 |
Number of options vested |
Concept (Shares) |
For Period |
|
gsm:NumberOfShareOptionsVestedInShareBasedPaymentArrangement |
| 1841 |
Number of options unvested |
Concept (Shares) |
For Period |
|
gsm:NumberOfShareOptionsUnvestedInShareBasedPaymentArrangement |
| 1842 |
Share based compensation expense |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees |
| 1843 |
Payment settled for equity shares |
Concept (Monetary) |
For Period |
Credit |
gsm:PaymentForSettlementOfEquityShares |
| 1844 |
42106 - Disclosure - Other liabilities - RSU's and SAR's (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureOtherLiabilitiesRsuSAndSarSDetails |
| 1845 |
Disclosure of terms and conditions of share-based payment arrangement [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable |
| 1846 |
Types of share-based payment arrangements [axis] |
Axis |
|
|
ifrs-full:TypesOfSharebasedPaymentArrangementsAxis |
| 1847 |
Share-based payment arrangements [member] |
Member |
|
|
ifrs-full:SharebasedPaymentArrangementsMember |
| 1848 |
Restricted stock units |
Member |
|
|
gsm:IfrsRestrictedStockUnitsRsuMember |
| 1849 |
Employee stock option |
Member |
|
|
gsm:IfrsEmployeeStockOptionMember |
| 1850 |
Stock appreciation rights |
Member |
|
|
gsm:IfrsStockAppreciationRightsSarsMember |
| 1851 |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems |
| 1852 |
Options granted |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement |
| 1853 |
Share options exercised |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement |
| 1854 |
Outstanding |
Concept (Decimal) |
As Of |
|
ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement |
| 1855 |
Share based compensation expense |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees |
| 1856 |
Share based compensation expense, after tax |
Concept (Monetary) |
For Period |
Debit |
gsm:ExpenseFromShareBasedPaymentTransactionsWithEmployeesAfterTax |
| 1857 |
Liability from share based payments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilitiesFromSharebasedPaymentTransactions2011 |
| 1858 |
Non current liability from share based payments |
Concept (Monetary) |
As Of |
Credit |
gsm:LiabilitiesFromShareBasedPaymentTransactions2011OtherNonCurrentLiabilities |
| 1859 |
Vesting percentage of share-based awards |
Concept (Percent) |
For Period |
|
gsm:VestingPercentageOfShareBasedAwards |
| 1860 |
Vesting life |
Concept (xbrli:durationItemType) |
For Period |
|
gsm:VestingLifeOfShareBasedAwards |
| 1861 |
Exercised |
Concept (Decimal) |
For Period |
|
ifrs-full:NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement |
| 1862 |
Cancelled |
Concept (Shares) |
For Period |
|
gsm:NumberOfOtherEquityInstrumentsCancelledInShareBasedPaymentArrangement |
| 1863 |
42201 - Disclosure - Tax matters - Components of current and deferred tax expense (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureTaxMattersComponentsOfCurrentAndDeferredTaxExpenseDetails |
| 1864 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1865 |
Tax matters |
Abstract |
|
|
ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract |
| 1866 |
Current income tax charge/(credit) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CurrentTaxExpenseIncome |
| 1867 |
Adjustments in current income tax in respect of prior period years |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForCurrentTaxOfPriorPeriod |
| 1868 |
Total |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriods |
| 1869 |
Origination and reversal of temporary differences |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences |
| 1870 |
Impact of tax rate changes |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:DeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes |
| 1871 |
Adjustments in deferred tax in respect of prior years |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AdjustmentsForDeferredTaxOfPriorPeriods |
| 1872 |
Total |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:DeferredTaxExpenseIncome |
| 1873 |
Income tax expense (benefit) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncomeTaxExpenseContinuingOperations |
| 1874 |
42202 - Disclosure - Tax matters - Statutory tax rate (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureTaxMattersStatutoryTaxRateDetails |
| 1875 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1876 |
Tax matters |
Abstract |
|
|
ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract |
| 1877 |
Accounting profit/(loss) before income tax |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:AccountingProfit |
| 1878 |
Effective tax rate |
Concept (Percent) |
For Period |
|
ifrs-full:AverageEffectiveTaxRate |
| 1879 |
At weighted effective tax rate of 30% (2017: 31% and 2016: 31%) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:TaxExpenseIncomeAtApplicableTaxRate |
| 1880 |
Non-taxable income/(expenses) |
Concept (Monetary) |
For Period |
Debit |
gsm:TaxEffectFromOtherNonTaxableIncomeExpenses |
| 1881 |
Non-deductible expenses |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss |
| 1882 |
Movements in unprovided deferred tax |
Concept (Monetary) |
For Period |
Debit |
gsm:TaxEffectFromUnprovidedDeferredTax |
| 1883 |
US Tax Reform - federal tax rate change |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:TaxEffectFromChangeInTaxRate |
| 1884 |
Differing territorial tax rates |
Concept (Monetary) |
For Period |
Debit |
gsm:TaxEffectFromDifferingTerritorialTaxRates |
| 1885 |
Adjustments in respect of prior periods |
Concept (Monetary) |
For Period |
Debit |
gsm:TaxEffectFromAdjustmentsInRespectOfPriorPeriods |
| 1886 |
Other items |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome |
| 1887 |
Elimination of effect of interest in joint ventures |
Concept (Monetary) |
For Period |
Debit |
gsm:TaxEffectOfEliminationOfEffectOfInterestInJointVentures |
| 1888 |
Other permanent differences |
Concept (Monetary) |
For Period |
Debit |
gsm:TaxEffectOfOtherPermanentDifferences |
| 1889 |
Incentives and deductions |
Concept (Monetary) |
For Period |
Credit |
gsm:TaxEffectOfIncentivesAndDeductions |
| 1890 |
US State taxes |
Concept (Monetary) |
For Period |
Debit |
gsm:TaxEffectOfStateTaxRates |
| 1891 |
Taxable capital gains |
Concept (Monetary) |
For Period |
Debit |
gsm:TaxEffectOfTaxableCapitalGains |
| 1892 |
Income tax expense (benefit) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncomeTaxExpenseContinuingOperations |
| 1893 |
Effective tax rate |
Concept (Percent) |
For Period |
|
ifrs-full:ApplicableTaxRate |
| 1894 |
42203 - Disclosure - Tax matters - Tax Cuts and Jobs Act (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureTaxMattersTaxCutsAndJobsActDetails |
| 1895 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1896 |
Tax matters |
Abstract |
|
|
ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract |
| 1897 |
Applicable tax rate |
Concept (Percent) |
For Period |
|
ifrs-full:ApplicableTaxRate |
| 1898 |
Deferred tax credit |
Concept (Monetary) |
For Period |
Credit |
gsm:TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateDeferredTaxLiabilityProvisionalIncomeTaxBenefit |
| 1899 |
One off tax charge |
Concept (Monetary) |
For Period |
Debit |
gsm:TaxCutsAndJobsActOf2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalIncomeTaxExpense |
| 1900 |
42204 - Disclosure - Tax Matters - Current Tax Assets and Liabilities (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureTaxMattersCurrentTaxAssetsAndLiabilitiesDetails |
| 1901 |
Implied Table |
Table |
* |
* |
implied:Table |
| 1902 |
Tax matters |
Abstract |
|
|
ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract |
| 1903 |
Current tax assets and liabilities |
Abstract |
|
|
gsm:CurrentTaxAssetsAndLiabilitiesAbstract |
| 1904 |
Current tax assets |
Abstract |
|
|
gsm:CurrentTaxAssetsAbstract |
| 1905 |
Income tax receivable |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:CurrentTaxAssets |
| 1906 |
Current tax liabilities |
Abstract |
|
|
gsm:CurrentTaxLiabilitiesAbstract |
| 1907 |
Income tax payable |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:CurrentTaxLiabilities |
| 1908 |
Net tax assets |
Concept (Monetary) |
As Of |
Debit |
gsm:CurrentTaxAssetsLiabilities |
| 1909 |
42205 - Disclosure - Tax matters - Deferred tax assets and liabilities (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureTaxMattersDeferredTaxAssetsAndLiabilitiesDetails |
| 1910 |
Disclosure of temporary difference, unused tax losses and unused tax credits [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable |
| 1911 |
Temporary difference, unused tax losses and unused tax credits [axis] |
Axis |
|
|
ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis |
| 1912 |
Temporary difference, unused tax losses and unused tax credits [member] |
Member |
|
|
ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember |
| 1913 |
Intangible assets |
Member |
|
|
ifrs-full:IntangibleAssetsAndGoodwillMember |
| 1914 |
Biological assets |
Member |
|
|
ifrs-full:BiologicalAssetsMember |
| 1915 |
Provisions |
Member |
|
|
ifrs-full:OtherProvisionsMember |
| 1916 |
Property, plant & equipment |
Member |
|
|
ifrs-full:PropertyPlantAndEquipmentMember |
| 1917 |
Inventories |
Member |
|
|
us-gaap:InventoriesMember |
| 1918 |
Hedging instruments |
Member |
|
|
ifrs-full:HedgingInstrumentsMember |
| 1919 |
Tax losses, incentives & credits |
Member |
|
|
gsm:UnusedTaxLossesIncentivesAndCreditsMember |
| 1920 |
Partnership Interest [Member] |
Member |
|
|
srt:PartnershipInterestMember |
| 1921 |
Other |
Member |
|
|
ifrs-full:OtherTemporaryDifferencesMember |
| 1922 |
Tax matters |
LineItems |
|
|
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems |
| 1923 |
Deferred tax assets and liabilities |
Abstract |
|
|
ifrs-full:ReconciliationOfChangesInDeferredTaxLiabilityAssetAbstract |
| 1924 |
Opening balance |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DeferredTaxLiabilityAsset |
| 1925 |
Prior Year Change |
Concept (Monetary) |
For Period |
Debit |
gsm:DeferredTaxLiabilityAssetPriorYearChange |
| 1926 |
Recognised in P&L |
Concept (Monetary) |
For Period |
|
ifrs-full:DeferredTaxExpenseIncomeRecognisedInProfitOrLoss |
| 1927 |
Recognised in Equity/ OCI |
Concept (Monetary) |
For Period |
|
ifrs-full:DeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity |
| 1928 |
Acquisitions/ Disposals |
Concept (Monetary) |
For Period |
Credit |
gsm:IncreaseDecreaseThroughBusinessCombinationsOrLossOfControlOfSubsidiaryDeferredTaxLiabilityAsset |
| 1929 |
Exchange Differences |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset |
| 1930 |
Closing balance |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DeferredTaxLiabilityAsset |
| 1931 |
42206 - Disclosure - Tax matters - Significant components of deferred tax assets and liabilities (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureTaxMattersSignificantComponentsOfDeferredTaxAssetsAndLiabilitiesDetails |
| 1932 |
Disclosure of temporary difference, unused tax losses and unused tax credits [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable |
| 1933 |
Temporary difference, unused tax losses and unused tax credits [axis] |
Axis |
|
|
ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis |
| 1934 |
Temporary difference, unused tax losses and unused tax credits [member] |
Member |
|
|
ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember |
| 1935 |
Unused tax losses |
Member |
|
|
ifrs-full:UnusedTaxLossesMember |
| 1936 |
Unused tax credits |
Member |
|
|
ifrs-full:UnusedTaxCreditsMember |
| 1937 |
Unrecognised deductible temporary differences |
Member |
|
|
ifrs-full:TemporaryDifferenceMember |
| 1938 |
Hedging instruments |
Member |
|
|
ifrs-full:HedgingInstrumentsMember |
| 1939 |
Other |
Member |
|
|
ifrs-full:OtherTemporaryDifferencesMember |
| 1940 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems |
| 1941 |
Deferred tax assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NetDeferredTaxAssets |
| 1942 |
Deferred tax liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NetDeferredTaxLiabilities |
| 1943 |
Net Total Deferred Tax Asset / (Liability) |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DeferredTaxLiabilityAsset |
| 1944 |
Total |
Concept (Monetary) |
As Of |
Credit |
gsm:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCredits |
| 1945 |
Number of years open to review |
Concept (xbrli:durationItemType) |
For Period |
|
gsm:NumberOfYearsOpenToReview |
| 1946 |
42301 - Disclosure - Related party transactions and balances (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureRelatedPartyTransactionsAndBalancesDetails |
| 1947 |
Disclosure of transactions between related parties [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable |
| 1948 |
Joint ventures [axis] |
Axis |
|
|
ifrs-full:JointVenturesAxis |
| 1949 |
Entity's total for joint ventures [member] |
Member |
|
|
ifrs-full:EntitysTotalForJointVenturesMember |
| 1950 |
Aurinka And Blue Power Corporation, S.L. |
Member |
|
|
gsm:AurinkaAndBluePowerCorporationSLMember |
| 1951 |
Subsidiaries [axis] |
Axis |
|
|
ifrs-full:SignificantInvestmentsInSubsidiariesAxis |
| 1952 |
Entity's total for subsidiaries [member] |
Member |
|
|
ifrs-full:EntitysTotalForSubsidiariesMember |
| 1953 |
Grupo Ferroatlantica And Hidro Nitro Espanola [Member] |
Member |
|
|
gsm:GrupoFerroatlanticaAndHidroNitroEspanolaMember |
| 1954 |
Grupo FerroAtlantica, S.A.U |
Member |
|
|
gsm:GrupoFerroatlanticaS.a.uMember |
| 1955 |
Hidro-Nitro Espanola, S.A. - Other segments - Energy |
Member |
|
|
gsm:HidroNitroEspanolaS.a.OtherSegmentsEnergyMember |
| 1956 |
Categories of related parties [axis] |
Axis |
|
|
ifrs-full:CategoriesOfRelatedPartiesAxis |
| 1957 |
Entity's total for related parties [member] |
Member |
|
|
ifrs-full:EntitysTotalForRelatedPartiesMember |
| 1958 |
Inmobiliaria Espacio, S.A. |
Member |
|
|
gsm:InmobiliariaEspacioS.a.Member |
| 1959 |
Grupo Villar Mir, S.A.U. |
Member |
|
|
gsm:GrupoVillarMirS.a.u.Member |
| 1960 |
Energya VM Generacion, S.L |
Member |
|
|
gsm:EnergyaVmGeneracionS.lMember |
| 1961 |
Energya VM Gestion, S.L |
Member |
|
|
gsm:EnergyaVmGestionS.lMember |
| 1962 |
Marco International |
Member |
|
|
gsm:MarcoInternationalMember |
| 1963 |
Villar Mir Energia, S.L.U. |
Member |
|
|
gsm:VillarMirEnergiaS.l.u.Member |
| 1964 |
Espacio Information Technology, S.A.U. |
Member |
|
|
gsm:EspacioInformationTechnologyS.a.u.Member |
| 1965 |
Blue Power Corporation, S.L. |
Member |
|
|
gsm:BluePowerCorporationS.l.Member |
| 1966 |
Other related parties |
Member |
|
|
ifrs-full:OtherRelatedPartiesMember |
| 1967 |
Key management personnel |
Member |
|
|
ifrs-full:KeyManagementPersonnelOfEntityOrParentMember |
| 1968 |
Related party transactions and balances |
LineItems |
|
|
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems |
| 1969 |
Non-current receivables due from related parties |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:NoncurrentReceivablesDueFromRelatedParties |
| 1970 |
Receivables, Non Current |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:AmountsReceivableRelatedPartyTransactions |
| 1971 |
Receivables, Current |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:TradeAndOtherCurrentReceivablesDueFromRelatedParties |
| 1972 |
Payables, Current |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:TradeAndOtherCurrentPayablesToRelatedParties |
| 1973 |
Short term loan maturity |
Concept (Text/String) |
For Period |
|
gsm:RelatedPartyTransactionsLoanMaturityTerm |
| 1974 |
Sales and Operating Income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromSaleOfGoodsRelatedPartyTransactions |
| 1975 |
Cost of Sales |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:PurchasesOfGoodsRelatedPartyTransactions |
| 1976 |
Staff costs |
Concept (Monetary) |
For Period |
Debit |
gsm:RelatedPartyStaffCosts |
| 1977 |
Other Operating Expenses |
Concept (Monetary) |
For Period |
Debit |
gsm:OtherOperatingExpensesRelatedPartyTransaction |
| 1978 |
Finance Income |
Concept (Monetary) |
For Period |
Credit |
gsm:FinanceIncomeRelatedPartyTransaction |
| 1979 |
Obligation for purchase of energy plus service charge |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:AmountsPayableRelatedPartyTransactions |
| 1980 |
Purchase of property, plant and equipment |
Concept (Monetary) |
For Period |
Credit |
gsm:PurchaseOfPropertyPlantAndEquipmentPerJointVenture |
| 1981 |
42401 - Disclosure - Guarantee commitments to third parties and contingent liabilities (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureGuaranteeCommitmentsToThirdPartiesAndContingentLiabilitiesDetails |
| 1982 |
Disclosure of contingent liabilities [table] |
Table |
* |
* |
ifrs-full:DisclosureOfContingentLiabilitiesTable |
| 1983 |
Classes of contingent liabilities [axis] |
Axis |
|
|
ifrs-full:ClassesOfContingentLiabilitiesAxis |
| 1984 |
Contingent liabilities [member] |
Member |
|
|
ifrs-full:ContingentLiabilitiesMember |
| 1985 |
Contingent |
Member |
|
|
ifrs-full:LegalProceedingsContingentLiabilityMember |
| 1986 |
Asbestos-related claims |
Member |
|
|
gsm:LegalProceedingsAsbestosClaimsContingentLiabilityMember |
| 1987 |
Guarantee commitments to third parties and other contingent assets and liabilities |
LineItems |
|
|
ifrs-full:DisclosureOfContingentLiabilitiesLineItems |
| 1988 |
Bank guarantees commitments to third parties |
Concept (Monetary) |
As Of |
Credit |
gsm:BankGuaranteesCommitmentsToThirdParties |
| 1989 |
Number of employees |
Concept (Integer) |
For Period |
|
gsm:IfrsLossContingencyNumberOfPlaintiffs |
| 1990 |
Number of case closed |
Concept (Integer) |
For Period |
|
gsm:IfrsLossContingencyClaimsSettledNumber |
| 1991 |
Number of claims pending |
Concept (Integer) |
As Of |
|
gsm:IfrsLossContingencyPendingClaimsNumber |
| 1992 |
Number of faute inexcusable |
Concept (Integer) |
For Period |
|
gsm:LossContingencyNumberOfInexcusableNegligence |
| 1993 |
Number of grave cases |
Concept (Integer) |
For Period |
|
gsm:NumberOfGraveCases |
| 1994 |
Bond to guarantee civil financial responsibility |
Concept (Monetary) |
As Of |
Debit |
gsm:BondToGuaranteeCivilFinancialResponsibility |
| 1995 |
Statutory maximum penalty per day per violation of standard provisions |
Concept (Monetary) |
For Period |
Debit |
gsm:StatutoryMaximumPenaltyForViolationOfStandardProvisions |
| 1996 |
42501 - Disclosure - Income and expenses - Sale by Segment (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureIncomeAndExpensesSaleBySegmentDetails |
| 1997 |
Disclosure of operating segments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfOperatingSegmentsTable |
| 1998 |
Segments [axis] |
Axis |
|
|
ifrs-full:SegmentsAxis |
| 1999 |
Segments [member] |
Member |
|
|
ifrs-full:SegmentsMember |
| 2000 |
Electrometallurgy - North America |
Member |
|
|
gsm:ElectrometallurgyNorthAmericaSegmentMember |
| 2001 |
Electrometallurgy - Europe |
Member |
|
|
gsm:ElectrometallurgyEuropeSegmentMember |
| 2002 |
Electrometallurgy - South Africa |
Member |
|
|
gsm:ElectrometallurgySouthAfricaSegmentMember |
| 2003 |
Other segments |
Member |
|
|
ifrs-full:AllOtherSegmentsMember |
| 2004 |
Segment consolidation items [axis] |
Axis |
|
|
ifrs-full:SegmentConsolidationItemsAxis |
| 2005 |
Entity's total for segment consolidation items [member] |
Member |
|
|
ifrs-full:EntitysTotalForSegmentConsolidationItemsMember |
| 2006 |
Operating segments |
Member |
|
|
ifrs-full:OperatingSegmentsMember |
| 2007 |
Eliminations |
Member |
|
|
ifrs-full:EliminationOfIntersegmentAmountsMember |
| 2008 |
Sales by segment |
LineItems |
|
|
ifrs-full:DisclosureOfOperatingSegmentsLineItems |
| 2009 |
Sales |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromContractsWithCustomers |
| 2010 |
42502 - Disclosure - Income and expenses - Sale by Geographical Area (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureIncomeAndExpensesSaleByGeographicalAreaDetails |
| 2011 |
Disclosure of operating segments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfOperatingSegmentsTable |
| 2012 |
Geographical [Axis] |
Axis |
|
|
srt:StatementGeographicalAxis |
| 2013 |
Geographical [Domain] |
Member |
|
|
srt:SegmentGeographicalDomain |
| 2014 |
Spain |
Member |
|
|
country:ES |
| 2015 |
Germany |
Member |
|
|
country:DE |
| 2016 |
Italy |
Member |
|
|
country:IT |
| 2017 |
Other EU Countries |
Member |
|
|
gsm:EuropeanCountriesOtherThanSpainGermanyItalyMember |
| 2018 |
USA |
Member |
|
|
country:US |
| 2019 |
Rest of World |
Member |
|
|
gsm:WorldOtherThanEuropeanAndUSMember |
| 2020 |
Sales by Geographical Area |
LineItems |
|
|
ifrs-full:DisclosureOfOperatingSegmentsLineItems |
| 2021 |
Sales |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:RevenueFromContractsWithCustomers |
| 2022 |
42503 - Disclosure - Income and expenses - Staff Costs (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureIncomeAndExpensesStaffCostsDetails |
| 2023 |
Implied Table |
Table |
* |
* |
implied:Table |
| 2024 |
Income and expenses |
Abstract |
|
|
ifrs-full:AnalysisOfIncomeAndExpenseAbstract |
| 2025 |
Staff costs |
Abstract |
|
|
ifrs-full:ClassesOfEmployeeBenefitsExpenseAbstract |
| 2026 |
Wages, salaries and similar expenses |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:WagesAndSalaries |
| 2027 |
Pension plan contributions |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:PostemploymentBenefitExpenseDefinedContributionPlans |
| 2028 |
Employee benefit costs |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:OtherEmployeeExpense |
| 2029 |
Staff costs |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:EmployeeBenefitsExpense |
| 2030 |
42504 - Disclosure - Income and expenses - Depreciation and Amortization charges (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureIncomeAndExpensesDepreciationAndAmortizationChargesDetails |
| 2031 |
Disclosure Of Income And Expenses [Table] |
Table |
* |
* |
gsm:DisclosureOfIncomeAndExpensesTable |
| 2032 |
Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] |
Axis |
|
|
ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis |
| 2033 |
Carrying amount [member] |
Member |
|
|
ifrs-full:CarryingAmountMember |
| 2034 |
Accumulated impairment |
Member |
|
|
ifrs-full:AccumulatedImpairmentMember |
| 2035 |
Disclosure of financial assets [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialAssetsLineItems |
| 2036 |
Depreciation and amortization charges, operating allowances and write-downs |
Abstract |
|
|
ifrs-full:DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossAbstract |
| 2037 |
Amortization of intangible assets (Note 8) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:AmortisationExpense |
| 2038 |
Depreciation of property, plant and equipment (Note 9) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:DepreciationExpense |
| 2039 |
Other write-downs and reversals |
Concept (Monetary) |
For Period |
Debit |
gsm:OtherWriteDownsAndReversals |
| 2040 |
Depreciation and amortization charges, operating allowances and write-downs |
Concept (Monetary) |
For Period |
Debit |
gsm:DepreciationAndAmortizationChargesOperatingAllowancesAndWriteDowns |
| 2041 |
Change in impairment losses on uncollectible trade receivables (Note 10) |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:IncreaseDecreaseThroughTransfersFinancialAssets |
| 2042 |
42505 - Disclosure - Income and expenses - Finance Income and Finance Costs (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureIncomeAndExpensesFinanceIncomeAndFinanceCostsDetails |
| 2043 |
Implied Table |
Table |
* |
* |
implied:Table |
| 2044 |
Income and expenses |
Abstract |
|
|
ifrs-full:AnalysisOfIncomeAndExpenseAbstract |
| 2045 |
Finance income |
Abstract |
|
|
gsm:FinanceIncomeAbstract |
| 2046 |
Finance income of related parties (Note 23) |
Concept (Monetary) |
For Period |
Credit |
gsm:FinanceIncomeRelatedPartyTransaction |
| 2047 |
Other finance income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:OtherFinanceIncome |
| 2048 |
Finance income |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:FinanceIncome |
| 2049 |
Finance costs |
Abstract |
|
|
gsm:FinanceCostsAbstract |
| 2050 |
Interest on debt instruments |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:InterestExpenseOnDebtInstrumentsIssued |
| 2051 |
Interest on loans and credit facilities |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:InterestExpenseOnBorrowings |
| 2052 |
Interest on note and bill discounting |
Concept (Monetary) |
For Period |
Debit |
gsm:InterestExpenseOnNoteAndBillDiscounting |
| 2053 |
Interest on interest rate swaps |
Concept (Monetary) |
For Period |
Debit |
gsm:InterestExpenseOnInterestRateSwaps |
| 2054 |
Interest on finance leases |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:InterestExpenseOnFinanceLeases |
| 2055 |
Trade receivables securitization expense (Note 10) |
Concept (Monetary) |
For Period |
Debit |
gsm:TradeReceivablesSecuritizationExpense |
| 2056 |
Other finance costs |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:OtherFinanceCost |
| 2057 |
Finance costs |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:FinanceCosts |
| 2058 |
42506 - Disclosure - Income and expenses - Impairment Losses (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureIncomeAndExpensesImpairmentLossesDetails |
| 2059 |
Implied Table |
Table |
* |
* |
implied:Table |
| 2060 |
Income and expenses |
Abstract |
|
|
ifrs-full:AnalysisOfIncomeAndExpenseAbstract |
| 2061 |
Impairment losses |
Abstract |
|
|
ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossAbstract |
| 2062 |
Impairment charge related to goodwill |
Concept (Monetary) |
For Period |
|
ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill |
| 2063 |
Impairment of intangible assets |
Concept (Monetary) |
For Period |
|
ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill |
| 2064 |
Impairment of property, plant and equipment |
Concept (Monetary) |
For Period |
|
ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment |
| 2065 |
Impairment of non-current financial assets |
Concept (Monetary) |
For Period |
Debit |
gsm:ImpairmentNoncurrentFinancialAssets |
| 2066 |
Impairment losses |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ImpairmentLossRecognisedInProfitOrLoss |
| 2067 |
Net (loss) gain due to changes in the value of assets |
Abstract |
|
|
ifrs-full:ChangesInFairValueMeasurementAssetsAbstract |
| 2068 |
(Increase) decrease in fair value of biological assets |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnChangeInFairValueEstimatesOfBiologicalAssetsForCurrentPeriod |
| 2069 |
Other (gain) loss |
Concept (Monetary) |
For Period |
Credit |
gsm:GainsLossesRecognisedInProfitOrLossFairValueMeasurementOfOtherAssets |
| 2070 |
Net gains/losses due to changes in the value of assets |
Concept (Monetary) |
For Period |
|
ifrs-full:GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssets |
| 2071 |
(Loss) gain on disposal of non-current assets |
Abstract |
|
|
ifrs-full:GainsLossesOnDisposalsOfNoncurrentAssetsAbstract |
| 2072 |
Loss on disposal of Intangible assets |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DisposalsIntangibleAssetsAndGoodwill |
| 2073 |
Gain on disposal of Property, plant and equipment |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsOnDisposalsOfPropertyPlantAndEquipment |
| 2074 |
Loss on disposal of Property, plant and equipment |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:LossesOnDisposalsOfPropertyPlantAndEquipment |
| 2075 |
(Gains) loss on disposal of other non-current assets |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnDisposalsOfOtherNoncurrentAssets |
| 2076 |
Gain on disposal of subsidiary |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesRecognisedWhenControlInSubsidiaryIsLost |
| 2077 |
Total |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainLossRecognisedOnMeasurementToFairValueLessCostsToSellOrOnDisposalOfAssetsOrDisposalGroupsConstitutingDiscontinuedOperation |
| 2078 |
Cash proceeds |
Concept (Monetary) |
For Period |
Debit |
gsm:ProceedsFromSaleOfSubsidiaries |
| 2079 |
Gain on disposal |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesRecognisedWhenControlInSubsidiaryIsLost |
| 2080 |
42601 - Disclosure - Remuneration of key management personnel (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureRemunerationOfKeyManagementPersonnelDetails |
| 2081 |
Disclosure of transactions between related parties [table] |
Table |
* |
* |
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable |
| 2082 |
Categories of related parties [axis] |
Axis |
|
|
ifrs-full:CategoriesOfRelatedPartiesAxis |
| 2083 |
Entity's total for related parties [member] |
Member |
|
|
ifrs-full:EntitysTotalForRelatedPartiesMember |
| 2084 |
Key management personnel |
Member |
|
|
ifrs-full:KeyManagementPersonnelOfEntityOrParentMember |
| 2085 |
Remuneration and other benefits paid to key management personnel |
LineItems |
|
|
ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems |
| 2086 |
Fixed remuneration |
Concept (Monetary) |
For Period |
Debit |
gsm:KeyManagementPersonnelCompensationFixedRemuneration |
| 2087 |
Variable remuneration |
Concept (Monetary) |
For Period |
Debit |
gsm:KeyManagementPersonnelCompensationVariableRemuneration |
| 2088 |
Contributions to pension plans and insurance policies |
Concept (Monetary) |
For Period |
Debit |
gsm:KeyManagementPersonnelCompensationContributionsToPensionPlansAndInsurancePolicies |
| 2089 |
Share-based compensation |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment |
| 2090 |
Termination benefits |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:KeyManagementPersonnelCompensationTerminationBenefits |
| 2091 |
Other remuneration |
Concept (Monetary) |
For Period |
Debit |
gsm:KeyManagementPersonnelCompensationOtherRemuneration |
| 2092 |
Total |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:KeyManagementPersonnelCompensation |
| 2093 |
Loans and advances granted |
Concept (Monetary) |
As Of |
Debit |
gsm:KeyManagementPersonnelLoansAndAdvancesGranted |
| 2094 |
42701 - Disclosure - Financial risk management (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFinancialRiskManagementDetails |
| 2095 |
Disclosure of nature and extent of risks arising from financial instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable |
| 2096 |
Range [axis] |
Axis |
|
|
ifrs-full:RangeAxis |
| 2097 |
Ranges [member] |
Member |
|
|
ifrs-full:RangesMember |
| 2098 |
Minimum |
Member |
|
|
ifrs-full:BottomOfRangeMember |
| 2099 |
Maximum |
Member |
|
|
ifrs-full:TopOfRangeMember |
| 2100 |
Categories of related parties [axis] |
Axis |
|
|
ifrs-full:CategoriesOfRelatedPartiesAxis |
| 2101 |
Entity's total for related parties [member] |
Member |
|
|
ifrs-full:EntitysTotalForRelatedPartiesMember |
| 2102 |
Grupo Villar Mir, S.A.U. |
Member |
|
|
gsm:GrupoVillarMirS.a.u.Member |
| 2103 |
Types of risks [axis] |
Axis |
|
|
ifrs-full:TypesOfRisksAxis |
| 2104 |
Risks [member] |
Member |
|
|
ifrs-full:TypesOfRisksMember |
| 2105 |
Foreign currency risk |
Member |
|
|
ifrs-full:CurrencyRiskMember |
| 2106 |
Liquidity risk |
Member |
|
|
ifrs-full:LiquidityRiskMember |
| 2107 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 2108 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 2109 |
Credit facilities |
Member |
|
|
gsm:CreditFacilitiesMember |
| 2110 |
Senior Notes due 2022 |
Member |
|
|
gsm:SeniorNotesDue2022Member |
| 2111 |
Senior Notes due 2022 issued by Ferroglobe PLC |
Member |
|
|
gsm:SeniorNotesDue2022IssuedByFerroglobePlcMember |
| 2112 |
Amended revolving credit facility |
Member |
|
|
gsm:AmendedRevolvingCreditFacilityMember |
| 2113 |
Revolving Credit Facility |
Member |
|
|
gsm:RevolvingLineOfCreditMember |
| 2114 |
New Revolving Credit Facility |
Member |
|
|
gsm:NewRevolvingCreditFacilityMember |
| 2115 |
Financial risk management |
LineItems |
|
|
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems |
| 2116 |
Principal amount |
Concept (Monetary) |
As Of |
|
ifrs-full:NotionalAmount |
| 2117 |
Amount of borrowings utilized including letters of credit |
Concept (Monetary) |
As Of |
Credit |
gsm:DrawnBorrowingFacilitiesIncludingLettersOfCredit |
| 2118 |
Fixed Interest Rate |
Concept (Percent) |
As Of |
|
ifrs-full:BorrowingsInterestRate |
| 2119 |
Redemption price of notes at change of control |
Concept (Percent) |
For Period |
|
gsm:DebtInstrumentRedemptionPricePercentageAtChangeInControl |
| 2120 |
Number of installments |
Concept (Integer) |
For Period |
|
gsm:NumberOfLeaseInstallments |
| 2121 |
Change in percentage of voting stock held other than by permitted holders and its affiliates to occur change in control |
Concept (Percent) |
For Period |
|
gsm:ChangeInPercentageOfVotingStockHeldOtherThanByPermittedHoldersAndItsAffiliatesWhichOccurInChangeInControl |
| 2122 |
Cessation of percentage of voting interest which occur in change in control |
Concept (Percent) |
For Period |
|
gsm:CessationOfPercentageOfVotingInterestWhichOccurInChangeInControl |
| 2123 |
Ownership interest as a percentage |
Concept (Percent) |
For Period |
|
gsm:PercentageOfOwnershipInterestHeldByRelatedParty |
| 2124 |
Threshold percentage of ownership interest held by related party lenders |
Concept (Percent) |
For Period |
|
gsm:ThresholdPercentageOfOwnershipInterestHeldByRelatedPartyLenders |
| 2125 |
Threshold percentage of ownership interest held by purchaser after acquisition of lender shares |
Concept (Percent) |
For Period |
|
gsm:ThresholdPercentageOfOwnershipInterestHeldByPurchaserAfterAcquisitionOfLenderShares |
| 2126 |
Percentage of Principal and Interest Payments |
Concept (Percent) |
For Period |
|
gsm:PercentageOfPrincipalAndInterestPayments |
| 2127 |
Borrowings |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:Borrowings |
| 2128 |
Borrowings |
Concept (Monetary) |
As Of |
Credit |
gsm:BorrowingsDrawDown |
| 2129 |
Percentage of Company's sales |
Concept (Percent) |
For Period |
|
ifrs-full:PercentageOfEntitysRevenue |
| 2130 |
42702 - Disclosure - Financial risk management - interest-bearing financial liabilities (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFinancialRiskManagementInterestBearingFinancialLiabilitiesDetails |
| 2131 |
Disclosure of financial instruments by type of interest rate [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateTable |
| 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 |
Types of interest rates [axis] |
Axis |
|
|
ifrs-full:TypesOfInterestRatesAxis |
| 2136 |
Interest rate types [member] |
Member |
|
|
ifrs-full:InterestRateTypesMember |
| 2137 |
Fixed rate |
Member |
|
|
ifrs-full:FixedInterestRateMember |
| 2138 |
Floating rate |
Member |
|
|
ifrs-full:FloatingInterestRateMember |
| 2139 |
Disclosure of financial instruments by type of interest rate [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialInstrumentsByTypeOfInterestRateLineItems |
| 2140 |
Bank borrowings |
Concept (Monetary) |
As Of |
Credit |
gsm:BorrowingsAndOtherFinancialLiabilities |
| 2141 |
Obligations under finance leases |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LeaseLiabilities |
| 2142 |
Debt instruments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DebtSecurities |
| 2143 |
Other financial liabilities |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:OtherNoncurrentFinancialLiabilities |
| 2144 |
Interest-bearing financial liabilities |
Concept (Monetary) |
As Of |
Credit |
gsm:InterestBearingFinancialLiabilities |
| 2145 |
Percentage of exposure to floating interest rate |
Concept (Percent) |
For Period |
|
gsm:PercentageOfExposureToFloatingInterestRate |
| 2146 |
Increase in floating interest rate, Percentage |
Concept (Percent) |
As Of |
|
gsm:IncreaseDecreaseInFloatingRateOfBorrowingsPercentage |
| 2147 |
Additional borrowing cost if 1% increase in floating interest rate |
Concept (Monetary) |
For Period |
Debit |
gsm:AdditionalBorrowingCostChangeInFloatingInterestRate |
| 2148 |
42703 - Disclosure - Financial risk management - Foreign currency risk (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFinancialRiskManagementForeignCurrencyRiskDetails |
| 2149 |
Disclosure of nature and extent of risks arising from financial instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable |
| 2150 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 2151 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 2152 |
Senior Notes due 2022 issued by Ferroglobe PLC |
Member |
|
|
gsm:SeniorNotesDue2022IssuedByFerroglobePlcMember |
| 2153 |
Types of risks [axis] |
Axis |
|
|
ifrs-full:TypesOfRisksAxis |
| 2154 |
Risks [member] |
Member |
|
|
ifrs-full:TypesOfRisksMember |
| 2155 |
Foreign currency risk |
Member |
|
|
ifrs-full:CurrencyRiskMember |
| 2156 |
Disclosure of nature and extent of risks arising from financial instruments [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems |
| 2157 |
Principal amount |
Concept (Monetary) |
As Of |
|
ifrs-full:NotionalAmount |
| 2158 |
Bank borrowings |
Concept (Monetary) |
As Of |
Credit |
gsm:BorrowingsAndOtherFinancialLiabilities |
| 2159 |
Amount by which the cross currency swap exceeds debt instruments |
Concept (Monetary) |
For Period |
Debit |
gsm:PrincipalDebtExceededByDerivatives |
| 2160 |
Appreciation of euro (Percentage) |
Concept (Percent) |
As Of |
|
gsm:PercentageOfSensitivityOfEuroAppreciation |
| 2161 |
Depreciation of euro (percentage) |
Concept (Percent) |
As Of |
|
gsm:PercentageOfSensitivityOfEuroDepreciation |
| 2162 |
Loss on portion of cross currency swap accounted for at fair value through profit or loss on appreciation of the Euro by 10% over USD |
Concept (Monetary) |
For Period |
Debit |
gsm:SensitivityOfForeignCurrencyLossOnPortionOfSwapAccountedForAtFairValueThroughProfitOrLoss |
| 2163 |
Gain on portion of cross currency swap accounted for at fair value through profit or loss on depreciation of the Euro by 10% against USD |
Concept (Monetary) |
For Period |
Credit |
gsm:SensitivityOfForeignCurrencyGainOnPortionOfSwapAccountedForAtFairValueThroughProfitOrLoss |
| 2164 |
42704 - Disclosure - Financial risk management - Liquidity risk (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFinancialRiskManagementLiquidityRiskDetails |
| 2165 |
Disclosure of nature and extent of risks arising from financial instruments [table] |
Table |
* |
* |
ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable |
| 2166 |
Maturity [axis] |
Axis |
|
|
ifrs-full:MaturityAxis |
| 2167 |
Aggregated time bands [member] |
Member |
|
|
ifrs-full:AggregatedTimeBandsMember |
| 2168 |
Not later than one year |
Member |
|
|
ifrs-full:NotLaterThanOneYearMember |
| 2169 |
Later than one year and not later than two years |
Member |
|
|
ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember |
| 2170 |
Later than two years and not later than five years [member] |
Member |
|
|
ifrs-full:LaterThanTwoYearsAndNotLaterThanFiveYearsMember |
| 2171 |
Later than five years [member] |
Member |
|
|
ifrs-full:LaterThanFiveYearsMember |
| 2172 |
Types of risks [axis] |
Axis |
|
|
ifrs-full:TypesOfRisksAxis |
| 2173 |
Risks [member] |
Member |
|
|
ifrs-full:TypesOfRisksMember |
| 2174 |
Liquidity risk |
Member |
|
|
ifrs-full:LiquidityRiskMember |
| 2175 |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems |
| 2176 |
Net undiscounted cash flows |
Abstract |
|
|
gsm:NetUndiscountedCashFlowsAbstract |
| 2177 |
Bank borrowings |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:BankBorrowingsUndiscountedCashFlows |
| 2178 |
Finance leases |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:GrossFinanceLeaseObligations |
| 2179 |
Debt instruments |
Concept (Monetary) |
As Of |
Credit |
gsm:DebtInstrumentsUndiscountedCashFlow |
| 2180 |
Financial loans from government agencies |
Concept (Monetary) |
As Of |
Credit |
gsm:FinancialLoansFromGovernmentAgenciesUndiscountedCashFlows |
| 2181 |
Derivative financial instruments |
Concept (Monetary) |
As Of |
Credit |
gsm:DerivativeFinancialInstrumentsUndiscountedCashFlows |
| 2182 |
Payables to related parties |
Concept (Monetary) |
As Of |
Credit |
gsm:PayablesToRelatedPartiesUndiscountedCashFlows |
| 2183 |
Payable to non-current asset suppliers |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:PayablesForPurchaseOfNoncurrentAssets |
| 2184 |
Contingent consideration |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilitiesIncurred |
| 2185 |
Trade and other payables |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:TradeAndOtherPayablesUndiscountedCashFlows |
| 2186 |
Contractual undiscounted payments |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:NonderivativeFinancialLiabilitiesUndiscountedCashFlows |
| 2187 |
Gross inflows and outflows |
Abstract |
|
|
gsm:GrossInflowsAndOutflowsAbstract |
| 2188 |
Inflows |
Concept (Monetary) |
As Of |
Debit |
gsm:GrossCashInflowDerivativeFinancialInstruments |
| 2189 |
Outflows |
Concept (Monetary) |
As Of |
Credit |
gsm:GrossCashOutflowDerivativeFinancialInstruments |
| 2190 |
Net cash flow |
Concept (Monetary) |
As Of |
Debit |
gsm:NetCashFlowDerivativeFinancialInstruments |
| 2191 |
Discounted at the applicable interbank rates |
Concept (Monetary) |
For Period |
Debit |
gsm:NetCashFlowDiscounted |
| 2192 |
42705 - Disclosure - Financial risk management - Changes in liabilities (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFinancialRiskManagementChangesInLiabilitiesDetails |
| 2193 |
Disclosure of reconciliation of liabilities arising from financing activities [table] |
Table |
* |
* |
ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesTable |
| 2194 |
Liabilities arising from financing activities [axis] |
Axis |
|
|
ifrs-full:LiabilitiesArisingFromFinancingActivitiesAxis |
| 2195 |
Liabilities arising from financing activities [member] |
Member |
|
|
ifrs-full:LiabilitiesArisingFromFinancingActivitiesMember |
| 2196 |
Bank borrowings. |
Member |
|
|
ifrs-full:LongtermBorrowingsMember |
| 2197 |
Obligations under finance leases. |
Member |
|
|
ifrs-full:LeaseLiabilitiesMember |
| 2198 |
Debt instruments |
Member |
|
|
gsm:DebtInstrumentsMember |
| 2199 |
Financial loans from government agencies |
Member |
|
|
gsm:LoansFromGovernmentMember |
| 2200 |
Derivative financial instruments |
Member |
|
|
ifrs-full:AssetsHeldToHedgeLiabilitiesArisingFromFinancingActivitiesMember |
| 2201 |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems |
| 2202 |
Changes in liabilities arising from financing activities [abstract] |
Abstract |
|
|
ifrs-full:ChangesInLiabilitiesArisingFromFinancingActivitiesAbstract |
| 2203 |
Beginning of period |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilitiesArisingFromFinancingActivities |
| 2204 |
Reclassification of business held for sale |
Concept (Monetary) |
For Period |
Credit |
gsm:IncreaseDecreaseThroughReclassificationOfBusinessHeldForSaleLiabilitiesArisingFromFinancingActivities |
| 2205 |
Changes from financing cash flows |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughFinancingCashFlowsLiabilitiesArisingFromFinancingActivities |
| 2206 |
Effect of changes in foreign exchange rates |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities |
| 2207 |
Changes in fair value |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughChangesInFairValuesLiabilitiesArisingFromFinancingActivities |
| 2208 |
Other changes |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities |
| 2209 |
End of period |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:LiabilitiesArisingFromFinancingActivities |
| 2210 |
Dividends paid |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DividendsPaidClassifiedAsFinancingActivities |
| 2211 |
Proceeds from stock option exercises |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromExerciseOfOptions |
| 2212 |
Other amounts paid due to financing activities |
Concept (Monetary) |
For Period |
Debit |
gsm:OtherOutflowsClassifiedAsFinancingActivities |
| 2213 |
Payments to acquire or redeem own shares |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:PaymentsToAcquireOrRedeemEntitysShares |
| 2214 |
Cash flows from (used in) financing activities |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:CashFlowsFromUsedInFinancingActivities |
| 2215 |
42801 - Disclosure - Fair value measurement - Estimate of fair value (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureFairValueMeasurementEstimateOfFairValueDetails |
| 2216 |
Disclosure of financial liabilities [table] |
Table |
* |
* |
ifrs-full:DisclosureOfFinancialLiabilitiesTable |
| 2217 |
Classes of financial assets [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialAssetsAxis |
| 2218 |
Financial assets, class [member] |
Member |
|
|
ifrs-full:FinancialAssetsMember |
| 2219 |
Debt investments |
Member |
|
|
us-gaap:DebtSecuritiesMember |
| 2220 |
Equity securities |
Member |
|
|
us-gaap:EquitySecuritiesMember |
| 2221 |
Classes of financial instruments [axis] |
Axis |
|
|
ifrs-full:ClassesOfFinancialInstrumentsAxis |
| 2222 |
Financial instruments, class [member] |
Member |
|
|
ifrs-full:ClassesOfFinancialInstrumentsMember |
| 2223 |
Derivatives [member] |
Member |
|
|
ifrs-full:DerivativesMember |
| 2224 |
Cross currency swap |
Member |
|
|
ifrs-full:CurrencySwapContractMember |
| 2225 |
Interest rate swap contract [member] |
Member |
|
|
ifrs-full:InterestRateSwapContractMember |
| 2226 |
Levels of fair value hierarchy [axis] |
Axis |
|
|
ifrs-full:LevelsOfFairValueHierarchyAxis |
| 2227 |
All levels of fair value hierarchy [member] |
Member |
|
|
ifrs-full:AllLevelsOfFairValueHierarchyMember |
| 2228 |
Level 1 of fair value hierarchy [member] |
Member |
|
|
ifrs-full:Level1OfFairValueHierarchyMember |
| 2229 |
Level 2 of fair value hierarchy [member] |
Member |
|
|
ifrs-full:Level2OfFairValueHierarchyMember |
| 2230 |
Level 3 of fair value hierarchy [member] |
Member |
|
|
ifrs-full:Level3OfFairValueHierarchyMember |
| 2231 |
Measurement [axis] |
Axis |
|
|
ifrs-full:MeasurementAxis |
| 2232 |
Aggregated measurement [member] |
Member |
|
|
ifrs-full:AggregatedMeasurementMember |
| 2233 |
At fair value [member] |
Member |
|
|
ifrs-full:AtFairValueMember |
| 2234 |
Disclosure of financial liabilities [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfFinancialLiabilitiesLineItems |
| 2235 |
Other assets |
Abstract |
|
|
ifrs-full:MiscellaneousAssetsAbstract |
| 2236 |
Biological assets |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:BiologicalAssets |
| 2237 |
Other financial assets |
Abstract |
|
|
ifrs-full:CategoriesOfFinancialAssetsAbstract |
| 2238 |
Other |
Concept (Monetary) |
As Of |
Debit |
ifrs-full:OtherFinancialAssets |
| 2239 |
Other financial liabilities |
Abstract |
|
|
ifrs-full:CategoriesOfFinancialLiabilitiesAbstract |
| 2240 |
Other financial liabilities - derivatives |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:DerivativeFinancialLiabilities |
| 2241 |
Other liabilities |
Abstract |
|
|
ifrs-full:MiscellaneousLiabilitiesAbstract |
| 2242 |
Contingent consideration in a business combinations |
Concept (Monetary) |
As Of |
Credit |
ifrs-full:ContingentLiabilitiesRecognisedInBusinessCombination |
| 2243 |
Assets and liabilities measured at fair value |
Abstract |
|
|
gsm:AssetsAndLiabilitiesMeasuredAtFairValueAbstract |
| 2244 |
Beginning of period |
Concept (Monetary) |
As Of |
Debit |
gsm:IfrsFairValueNetAssetLiability |
| 2245 |
Gain/Loss recognised in profit or loos |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:GainsLossesOnChangeInFairValueEstimatesOfBiologicalAssetsForCurrentPeriod |
| 2246 |
Disposals of biological assets |
Concept (Monetary) |
For Period |
Credit |
ifrs-full:DisposalsBiologicalAssets |
| 2247 |
Translation differences and other |
Concept (Monetary) |
For Period |
Credit |
gsm:FairValueNetAssetLiabilityTranslationDifferencesAndOther |
| 2248 |
End of period |
Concept (Monetary) |
As Of |
Debit |
gsm:IfrsFairValueNetAssetLiability |
| 2249 |
Proceeds from divested of certain timber farm plantations and associated property, plant and equipment |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations |
| 2250 |
MAI for gum to determine annual growth rate |
Concept (Pure) |
As Of |
|
gsm:MeanAnnualIncrementIndexForGumToDetermineAnnualGrowthRate |
| 2251 |
MAI for pine to determine annual growth rate |
Concept (Pure) |
As Of |
|
gsm:MeanAnnualIncrementIndexForPineToDetermineAnnualGrowthRate |
| 2252 |
Density index for pine |
Concept (Pure) |
As Of |
|
gsm:DensityIndexUsedToConvertCubicMetersOfWoodToMetricTonsForPine |
| 2253 |
Density index for wood pulp |
Concept (Pure) |
As Of |
|
gsm:DensityIndexUsedToConvertCubicMetersOfWoodToMetricTonsForWoodPulp |
| 2254 |
42901 - Disclosure - Non-current assets held for sale - (Details) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureNonCurrentAssetsHeldForSaleDetails |
| 2255 |
Disclosure of recognised finance lease as assets by lessee [table] |
Table |
* |
* |
ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeTable |
| 2256 |
Assets and liabilities classified as held for sale [axis] |
Axis |
|
|
ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis |
| 2257 |
Assets and liabilities not classified as held for sale [member] |
Member |
|
|
ifrs-full:AssetsAndLiabilitiesNotClassifiedAsHeldForSaleMember |
| 2258 |
Held for sale |
Member |
|
|
ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleMember |
| 2259 |
Disclosure of recognised finance lease as assets by lessee [line items] |
LineItems |
|
|
ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeLineItems |
| 2260 |
Current liabilities |
Abstract |
|
|
ifrs-full:CurrentLiabilitiesAbstract |
| 2261 |
Adjustment to the carrying amount of its assets equivalent to the depreciation that would have been charged if the business had not been classified as held for sale |
Concept (Monetary) |
For Period |
Debit |
gsm:AdjustmentToCarryingAmountOfAssets |
| 2262 |
43001 - Disclosure - Events after the reporting period (Detail) |
Network |
* |
* |
http://ferroglobe.com/role/DisclosureEventsAfterReportingPeriodDetail |
| 2263 |
Disclosure of non-adjusting events after reporting period [table] |
Table |
* |
* |
ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodTable |
| 2264 |
Borrowings by name [axis] |
Axis |
|
|
ifrs-full:BorrowingsByNameAxis |
| 2265 |
Borrowings by name [member] |
Member |
|
|
ifrs-full:BorrowingsByNameMember |
| 2266 |
Senior Notes due 2022 |
Member |
|
|
gsm:SeniorNotesDue2022Member |
| 2267 |
Senior Notes due 2022 issued by Ferroglobe PLC |
Member |
|
|
gsm:SeniorNotesDue2022IssuedByFerroglobePlcMember |
| 2268 |
Senior Notes due 2022 issued by Globe Specialty Metals, Inc |
Member |
|
|
gsm:SeniorNotesDue2022IssuedByGlobeSpecialtyMetalsIncMember |
| 2269 |
Non-adjusting events after reporting period [axis] |
Axis |
|
|
ifrs-full:NonadjustingEventsAfterReportingPeriodAxis |
| 2270 |
Non-adjusting events after reporting period [member] |
Member |
|
|
ifrs-full:NonadjustingEventsMember |
| 2271 |
Amended revolving credit facility |
Member |
|
|
gsm:AmendedRevolvingCreditFacilityMember |
| 2272 |
Events after the reporting period |
LineItems |
|
|
ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems |
| 2273 |
Amended Revolving Credit Facility |
Abstract |
|
|
gsm:AmendedRevolvingCreditFacilityAbstract |
| 2274 |
Minimum cash liquidity |
Concept (Monetary) |
As Of |
Debit |
gsm:DebtInstrumentCovenantThresholdAmountOfMinimumCashLiquidityLevel |
| 2275 |
Notional amount |
Concept (Monetary) |
As Of |
|
ifrs-full:NotionalAmount |
| 2276 |
Cash consideration |
Concept (Monetary) |
For Period |
Debit |
ifrs-full:ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations |