POSCO (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line Label Object Class Period Type Balance Report ElementName
1 1001 - Document - Document and Entity Information Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DocumentandEntityInformation
2 Implied Table Table

*

*

implied:Table
3 Document and entity information [abstract] Abstract pkx:DocumentAndEntityInformationAbstract
4 Document Type Concept (Submission Type) For Period dei:DocumentType
5 Amendment Flag Concept (Yes/No) For Period dei:AmendmentFlag
6 Document Period End Date Concept (Date) For Period dei:DocumentPeriodEndDate
7 Document Fiscal Year Focus Concept (Year) For Period dei:DocumentFiscalYearFocus
8 Document Fiscal Period Focus Concept (Fiscal Period) For Period dei:DocumentFiscalPeriodFocus
9 Trading Symbol Concept (Text/String) For Period dei:TradingSymbol
10 Entity Registrant Name Concept (Text/String) For Period dei:EntityRegistrantName
11 Entity Central Index Key Concept (CIK Number) For Period dei:EntityCentralIndexKey
12 Current Fiscal Year End Date Concept (Month/Day) For Period dei:CurrentFiscalYearEndDate
13 Entity Well-known Seasoned Issuer Concept (Yes/No) For Period dei:EntityWellKnownSeasonedIssuer
14 Entity Current Reporting Status Concept (Yes/No) For Period dei:EntityCurrentReportingStatus
15 Entity Filer Category Concept (Filer Category) For Period dei:EntityFilerCategory
16 Entity Emerging Growth Company Concept (Yes/No) For Period dei:EntityEmergingGrowthCompany
17 Entity Shell Company Concept (Yes/No) For Period dei:EntityShellCompany
18 Entity Common Stock, Shares Outstanding Concept (Shares) As Of dei:EntityCommonStockSharesOutstanding
19 1003 - Statement - Consolidated Statements of Financial Position Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/StatementOfFinancialPositionCurrentNonCurrent-210000
20 Implied Table Table

*

*

implied:Table
21 Statement of financial position [abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
22 Assets Abstract ifrs-full:AssetsAbstract
23 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
24 Trade accounts and notes receivable, net Concept (Monetary) As Of Debit pkx:CurrentTradeAndNotesReceivables
25 Other receivables, net Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
26 Other short-term financial assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentFinancialAssets
27 Inventories Concept (Monetary) As Of Debit ifrs-full:Inventories
28 Current income tax assets Concept (Monetary) As Of Debit ifrs-full:CurrentTaxAssetsCurrent
29 Assets held for sale Concept (Monetary) As Of Debit ifrs-full:CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners
30 Other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentNonfinancialAssets
31 Total current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
32 Long-term trade accounts and notes receivable, net Concept (Monetary) As Of Debit pkx:NoncurrentTradeAndNotesReceivables
33 Other receivables, net Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentReceivables
34 Other long-term financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
35 Investments in associates and joint ventures Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
36 Investment property, net Concept (Monetary) As Of Debit ifrs-full:InvestmentProperty
37 Property, plant and equipment, net Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
38 Intangible assets, net Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsAndGoodwill
39 Defined benefit assets, net Concept (Monetary) As Of Debit ifrs-full:NoncurrentRecognisedAssetsDefinedBenefitPlan
40 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:NetDeferredTaxAssets
41 Other non-current assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentNonfinancialAssets
42 Total non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
43 Total assets Concept (Monetary) As Of Debit ifrs-full:Assets
44 Liabilities Abstract ifrs-full:LiabilitiesAbstract
45 Trade accounts and notes payable Concept (Monetary) As Of Credit pkx:CurrentTradeAccountsAndNotesPayables
46 Short-term borrowings and current installments of long-term borrowings Concept (Monetary) As Of Credit ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings
47 Other payables Concept (Monetary) As Of Credit ifrs-full:OtherCurrentPayables
48 Other short-term financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentFinancialLiabilities
49 Current income tax liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
50 Provisions Concept (Monetary) As Of Credit ifrs-full:OtherShorttermProvisions
51 Other current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentNonfinancialLiabilities
52 Total current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
53 Long-term trade accounts and notes payable Concept (Monetary) As Of Credit pkx:NoncurrentTradeAccountsAndNotesPayables
54 Long-term borrowings, excluding current installments Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
55 Other payables Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentPayables
56 Other long-term financial liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentFinancialLiabilities
57 Defined benefit liabilities, net Concept (Monetary) As Of Credit ifrs-full:NoncurrentRecognisedLiabilitiesDefinedBenefitPlan
58 Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:NetDeferredTaxLiabilities
59 Long-term provisions Concept (Monetary) As Of Credit ifrs-full:OtherLongtermProvisions
60 Other non-current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentNonfinancialLiabilities
61 Total non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
62 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
63 Equity Abstract ifrs-full:EquityAbstract
64 Share capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
65 Capital surplus Concept (Monetary) As Of Credit ifrs-full:AdditionalPaidinCapital
66 Hybrid bonds Concept (Monetary) As Of Credit pkx:HybridBonds
67 Reserves Concept (Monetary) As Of Credit ifrs-full:OtherReserves
68 Treasury shares Concept (Monetary) As Of Debit ifrs-full:TreasuryShares
69 Retained earnings Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
70 Equity attributable to owners of the controlling company Concept (Monetary) As Of Credit ifrs-full:EquityAttributableToOwnersOfParent
71 Non-controllinginterests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
72 Total equity Concept (Monetary) As Of Credit ifrs-full:Equity
73 Total liabilities and equity Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
74 1004 - Statement - Consolidated Statements of Comprehensive Income Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/StatementOfComprehensiveIncomeOCIComponentsPresentedNetOfTax-410000
75 Implied Table Table

*

*

implied:Table
76 Statement of comprehensive income [abstract] Abstract ifrs-full:StatementOfComprehensiveIncomeAbstract
77 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
78 Cost of sales Concept (Monetary) For Period Debit ifrs-full:CostOfSales
79 Gross profit Concept (Monetary) For Period Credit ifrs-full:GrossProfit
80 Selling and administrative expenses Abstract pkx:SellingAndAdministrativeExpensesAbstract
81 Impairment loss on trade accounts and notes receivable Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossRecognisedInProfitOrLossTradeReceivables
82 Other administrative expenses Concept (Monetary) For Period Debit pkx:OtherAdministrativeExpenses
83 Selling expenses Concept (Monetary) For Period Debit pkx:SellingExpenses
84 Other operating income and expenses Abstract ifrs-full:MaterialIncomeAndExpenseAbstract
85 Impairment loss on other receivables Concept (Monetary) For Period Debit pkx:ImpairmentLossOnOtherReceivables
86 Other operating income Concept (Monetary) For Period Credit ifrs-full:MiscellaneousOtherOperatingIncome
87 Other operating expenses Concept (Monetary) For Period Debit ifrs-full:MiscellaneousOtherOperatingExpense
88 Operating profit Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
89 Share of profit (loss) of equity-accounted investees, net Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
90 Finance income and costs Abstract pkx:FinanceIncomeAndFinanceCostsAbstract
91 Finance income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
92 Finance costs Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
93 Profit before income taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
94 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
95 Profit Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
96 Other comprehensive income (loss) Abstract ifrs-full:OtherComprehensiveIncomeAbstract
97 Items that will not be reclassified subsequently to profit or loss : Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract
98 Remeasurements of defined benefit plans Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
99 Net changes in fair value of equity investments at fair value through other comprehensive income Concept (Monetary) For Period Credit pkx:ChangesInTheFairValueOfEquityInvestmentsAtFairValueThroughOtherComprehensiveIncome
100 Items that are or may be reclassified subsequently to profit or loss : Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
101 Capital adjustment arising from investments in equity-method investees Concept (Monetary) For Period Credit ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax
102 Net changes in unrealized fair value of available-for-sale investments Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxAvailableforsaleFinancialAssets
103 Foreign currency translation differences Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
104 Gain or losses on valuation of derivatives Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
105 Other comprehensive income (loss), net of tax Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
106 Total comprehensive income Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
107 Profit attributable to : Abstract ifrs-full:ProfitLossAttributableToAbstract
108 Owners of the controlling company Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
109 Non-controllinginterests Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
110 Profit Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
111 Total comprehensive income attributable to : Abstract ifrs-full:ComprehensiveIncomeAttributableToAbstract
112 Owners of the controlling company Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
113 Non-controllinginterests Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
114 Total comprehensive income Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
115 Basic and diluted earnings per share (in Won) Concept (Share) For Period ifrs-full:BasicAndDilutedEarningsLossPerShare
116 1005 - Statement - Consolidated Statements of Changes in Equity Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/StatementOfChangesInEquity-610000
117 Statement of changes in equity [table] Table

*

*

ifrs-full:StatementOfChangesInEquityTable
118 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
119 Equity [member] Member ifrs-full:EquityMember
120 Share capital [member] Member ifrs-full:IssuedCapitalMember
121 Capital surplus [member] Member ifrs-full:AdditionalPaidinCapitalMember
122 Hybrid bonds [member] Member pkx:HybridBondsMember
123 Reserves [member] Member ifrs-full:OtherReservesMember
124 Treasury shares [member] Member ifrs-full:TreasurySharesMember
125 Retained earnings [member] Member ifrs-full:RetainedEarningsMember
126 Attributable to owners of the controlling company [member] Member ifrs-full:EquityAttributableToOwnersOfParentMember
127 Non-controlling interests [member] Member ifrs-full:NoncontrollingInterestsMember
128 Range [axis] Axis ifrs-full:RangeAxis
129 Ranges [member] Member ifrs-full:RangesMember
130 Final dividends [member] Member pkx:FinalDividendsMember
131 Interim dividends [member] Member pkx:InterimDividendsMember
132 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
133 Currently stated [member] Member ifrs-full:RestatedMember
134 Adjusted balance [member] Member ifrs-full:IncreaseDecreaseDueToChangesInAccountingPolicyRequiredByIFRSsMember
135 Statement of changes in equity [line items] LineItems ifrs-full:StatementOfChangesInEquityLineItems
136 Beginning balance Concept (Monetary) As Of Credit ifrs-full:Equity
137 Adjustment on initial application of IFRS No. 15, net of tax Concept (Monetary) For Period Credit pkx:IncreaseDecreaseInitialEffectByAdoptionOfifrs15
138 Adjustment on initial application of IFRS No. 9, net of tax Concept (Monetary) For Period Credit pkx:IncreaseDecreaseInitialEffectByAdoptionOfifrs9
139 Comprehensive income (loss): Abstract ifrs-full:ComprehensiveIncomeAbstract
140 Profit Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
141 Other comprehensive income (loss) Abstract ifrs-full:OtherComprehensiveIncomeAbstract
142 Remeasurements of defined benefit plans, net of tax Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
143 Capital adjustment arising from investments in equity-accounted investees, net of tax Concept (Monetary) For Period Credit ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax
144 Net changes in fair value of equity investments at fair value through other comprehensive income, net of tax Concept (Monetary) For Period Credit pkx:ChangesInTheFairValueOfEquityInvestmentsAtFairValueThroughOtherComprehensiveIncome
145 Net changes in the unrealized fair value of available-for-sale investments, net of tax Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxAvailableforsaleFinancialAssets
146 Foreign currency translation differences, net of tax Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
147 Gain or losses on valuation of derivatives, net of tax Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
148 Total comprehensive income Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
149 Transactions with owners of the controlling company, recognized directly in equity: Abstract pkx:TransactionsWithOwnersOfCompanyAbstract
150 Dividends Concept (Monetary) For Period Debit ifrs-full:DividendsPaid
151 Changes in subsidiaries Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangeInEquityOfSubsidiaries
152 Changes in ownership interests in subsidiaries Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl
153 Repayment of hybrid bonds Concept (Monetary) For Period Credit pkx:RepaymentOfHybridBondsRecognizedInEquity
154 Interest of hybrid bonds Concept (Monetary) For Period Debit pkx:InterestOnHybridBonds
155 Disposal of treasury shares Concept (Monetary) For Period Credit ifrs-full:SaleOrIssueOfTreasuryShares
156 Others Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity
157 Total transactions with owners of the controlling company Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTransactionsWithOwners
158 Ending balance Concept (Monetary) As Of Credit ifrs-full:Equity
159 1006 - Statement - Consolidated Statements of Cash Flows Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/StatementOfCashFlowsIndirectMethod-520000
160 Implied Table Table

*

*

implied:Table
161 Statement of cash flows [abstract] Abstract ifrs-full:StatementOfCashFlowsAbstract
162 Cash flows from operating activities Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
163 Profit Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
164 Adjustments for: Abstract ifrs-full:AdjustmentsForReconcileProfitLossAbstract
165 Depreciation Concept (Monetary) For Period Debit ifrs-full:DepreciationExpense
166 Amortization Concept (Monetary) For Period Debit ifrs-full:AmortisationExpense
167 Finance income Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForFinanceIncome
168 Finance costs Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForFinanceCosts
169 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
170 Gain on disposal of property, plant and equipment Concept (Monetary) For Period Credit ifrs-full:GainsOnDisposalsOfPropertyPlantAndEquipment
171 Loss on disposal of property, plant and equipment Concept (Monetary) For Period Debit ifrs-full:LossesOnDisposalsOfPropertyPlantAndEquipment
172 Impairment losses on property, plant and equipment Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
173 Gain on disposal of investments in subsidiaries, associates and joint ventures Concept (Monetary) For Period Credit pkx:AdjustmentsForGainOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates
174 Loss on disposal of investments in subsidiaries, associates and joint ventures Concept (Monetary) For Period Debit pkx:AdjustmentsForLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates
175 Share of loss (profit) of equity-accounted investees Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
176 Expenses related to post-employment benefits Concept (Monetary) For Period Debit pkx:AdjustmentsForPostEmploymentBenefits
177 Increase to provisions Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForProvisions
178 Impairment loss on trade and other receivables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossTradeAndOtherReceivables
179 Loss on valuation of inventories Concept (Monetary) For Period ifrs-full:InventoryWritedown2011
180 Gain on disposal of intangible assets Concept (Monetary) For Period Credit pkx:GainOnDisposalsOfIntangibleAssets
181 Impairment losses on goodwill and intangible assets Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsAndGoodwill
182 Gain on disposal of assets held for sale Concept (Monetary) For Period Credit pkx:GainOnDisposalsOfAssetsHeldForSale
183 Impairment losses on assets held for sale Concept (Monetary) For Period Debit pkx:ImpairmentLossOnAssetsHeldForSale
184 Others, net Concept (Monetary) For Period Debit ifrs-full:OtherAdjustmentsForNoncashItems
185 Adjustments to reconcile profit (loss) other than changes in working capital Concept (Monetary) For Period Debit ifrs-full:AdjustmentsToReconcileProfitLossOtherThanChangesInWorkingCapital
186 Changes in operating assets and liabilities Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInWorkingCapital
187 Interest received Concept (Monetary) For Period Debit ifrs-full:InterestReceivedClassifiedAsOperatingActivities
188 Interest paid Concept (Monetary) For Period Credit ifrs-full:InterestPaidClassifiedAsOperatingActivities
189 Dividends received Concept (Monetary) For Period Debit ifrs-full:DividendsReceivedClassifiedAsOperatingActivities
190 Income taxes paid Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidClassifiedAsOperatingActivities
191 Net cash provided by operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
192 Cash flows from investing activities Abstract ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
193 Acquisitions of short-term financial instruments Concept (Monetary) For Period Credit pkx:PurchaseOfShorttermFinancialInstrumentsClassifiedAsInvestingActivities
194 Proceeds from disposal of short-term financial instruments Concept (Monetary) For Period Debit pkx:ProceedsFromSalesOrMaturityOfShorttermFinancialInstrumentsClassifiedAsInvestingActivities
195 Increase in loans Concept (Monetary) For Period Credit ifrs-full:CashAdvancesAndLoansMadeToRelatedParties
196 Collection of loans Concept (Monetary) For Period Debit ifrs-full:CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToRelatedParties
197 Acquisitions of securities Concept (Monetary) For Period Credit ifrs-full:PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities
198 Acquisitions of available-for-sale investments Concept (Monetary) For Period Credit ifrs-full:PurchaseOfAvailableforsaleFinancialAssets
199 Proceeds from disposal of securities Concept (Monetary) For Period Debit pkx:ProceedsFromDisposalsOfLongtermInvestmentSecurities
200 Proceeds from disposal of available-for-sale investments Concept (Monetary) For Period Debit ifrs-full:ProceedsFromDisposalOrMaturityOfAvailableforsaleFinancialAssets
201 Acquisitions of investments in associates and joint ventures Concept (Monetary) For Period Credit ifrs-full:PurchaseOfInterestsInInvestmentsAccountedForUsingEquityMethod
202 Proceeds from disposal of investments in associates and joint ventures Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOfInvestmentsAccountedForUsingEquityMethod
203 Acquisitions of property, plant and equipment Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
204 Proceeds from disposal of property, plant and equipment Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
205 Acquisitions of investment property Concept (Monetary) For Period Credit ifrs-full:PurchaseOfInvestmentProperty
206 Proceeds from disposal of investment property Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOfInvestmentProperty
207 Acquisitions of intangible assets Concept (Monetary) For Period Credit ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities
208 Proceeds from disposal of intangible assets Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOfIntangibleAssetsClassifiedAsInvestingActivities
209 Proceeds from disposal of assets held for sale Concept (Monetary) For Period Debit ifrs-full:ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations
210 Increase in cash from (payment for) acquisition of business, net of cash acquired Concept (Monetary) For Period Debit ifrs-full:OtherCashReceiptsFromSalesOfEquityOrDebtInstrumentsOfOtherEntitiesClassifiedAsInvestingActivities
211 Cash received (decrease in cash) from disposal of business, net of cash transferred Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
212 Others, net Concept (Monetary) For Period Debit ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities
213 Net cash used in investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
214 Cash flows from financing activities Abstract ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
215 Proceeds from borrowings Concept (Monetary) For Period Debit ifrs-full:ProceedsFromNoncurrentBorrowings
216 Repayment of borrowings Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfNoncurrentBorrowings
217 Proceeds from (repayment of) short-term borrowings, net Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInIncreaseDecreaseInCurrentBorrowings
218 Payment of cash dividends Concept (Monetary) For Period Credit ifrs-full:DividendsPaidClassifiedAsFinancingActivities
219 Payment of interest of hybrid bonds Concept (Monetary) For Period Credit ifrs-full:InterestPaidClassifiedAsFinancingActivities
220 Repayment of hybrid bonds Concept (Monetary) For Period Credit pkx:RepaymentOfHybridBonds
221 Capital contribution from non-controlling interests and proceeds from disposal of subsidiary while maintaining control Concept (Monetary) For Period Debit ifrs-full:ProceedsFromContributionsOfNoncontrollingInterests
222 Capital deduction from non-controlling interests and additional acquisition of interests in subsidiaries Concept (Monetary) For Period Credit pkx:PaymentToContributionsOfNoncontrollingInterests
223 Others, net Concept (Monetary) For Period Debit ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities
224 Net cash used in financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
225 Effect of exchange rate fluctuation on cash held Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
226 Net increase (decrease) in cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
227 Cash and cash equivalents at beginning of the period Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
228 Cash and cash equivalents at end of the period Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
229 1007 - Disclosure - General Information Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfGeneralInformationAboutFinancialStatementsExplanatory
230 Implied Table Table

*

*

implied:Table
231 Text block [abstract] Abstract pkx:TextBlockAbstract
232 General Information Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeneralInformationAboutFinancialStatementsExplanatory
233 1008 - Disclosure - Statement of Compliance Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfStatementOfComplianceExplanatory
234 Implied Table Table

*

*

implied:Table
235 Text block [abstract] Abstract pkx:TextBlockAbstract
236 Statement of Compliance Concept (Text Block (HTML)) For Period pkx:DisclosureOfStatementOfComplianceExplanatory
237 1009 - Disclosure - Summary of Significant Accounting Policies Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
238 Implied Table Table

*

*

implied:Table
239 Text block [abstract] Abstract pkx:TextBlockAbstract
240 Summary of Significant Accounting Policies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
241 1010 - Disclosure - Financial risk management Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfFinancialRiskManagementExplanatory
242 Implied Table Table

*

*

implied:Table
243 Text block [abstract] Abstract pkx:TextBlockAbstract
244 Financial risk management Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialRiskManagementExplanatory
245 1011 - Disclosure - Cash and Cash Equivalents Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCashAndCashEquivalentsExplanatory
246 Implied Table Table

*

*

implied:Table
247 Text block [abstract] Abstract pkx:TextBlockAbstract
248 Cash and Cash Equivalents Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory
249 1012 - Disclosure - Trade Accounts and Notes Receivable Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfTradeAccountsAndNotesReceivableExplanatory
250 Implied Table Table

*

*

implied:Table
251 Text block [abstract] Abstract pkx:TextBlockAbstract
252 Trade Accounts and Notes Receivable Concept (Text Block (HTML)) For Period pkx:DisclosureOfTradeAccountsAndNotesReceivableExplanatory
253 1013 - Disclosure - Other Receivables Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherReceivablesExplanatory
254 Implied Table Table

*

*

implied:Table
255 Text block [abstract] Abstract pkx:TextBlockAbstract
256 Other Receivables Concept (Text Block (HTML)) For Period pkx:DisclosureOfOtherReceivablesExplanatory
257 1014 - Disclosure - Other Financial Assets Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherFinancialAssetsExplanatory
258 Implied Table Table

*

*

implied:Table
259 Text block [abstract] Abstract pkx:TextBlockAbstract
260 Other Financial Assets Concept (Text Block (HTML)) For Period pkx:DisclosureOfOtherFinancialAssetsExplanatory
261 1015 - Disclosure - Inventories Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfInventoriesExplanatory
262 Implied Table Table

*

*

implied:Table
263 Text block [abstract] Abstract pkx:TextBlockAbstract
264 Inventories Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInventoriesExplanatory
265 1016 - Disclosure - Assets Held for Sale Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory
266 Implied Table Table

*

*

implied:Table
267 Text block [abstract] Abstract pkx:TextBlockAbstract
268 Assets Held for Sale Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory
269 1017 - Disclosure - Investments in Associates and Joint ventures Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory
270 Implied Table Table

*

*

implied:Table
271 Text block [abstract] Abstract pkx:TextBlockAbstract
272 Investments in Associates and Joint ventures Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory
273 1018 - Disclosure - Joint Operations Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfJointOperationsExplanatory
274 Implied Table Table

*

*

implied:Table
275 Investments accounted for using equity method [abstract] Abstract ifrs-full:InvestmentsAccountedForUsingEquityMethodAbstract
276 Joint Operations Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfJointOperationsExplanatory
277 1019 - Disclosure - Investment Property, Net Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfInvestmentPropertyExplanatory
278 Implied Table Table

*

*

implied:Table
279 Text block [abstract] Abstract pkx:TextBlockAbstract
280 Investment Property, Net Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInvestmentPropertyExplanatory
281 1020 - Disclosure - Property, Plant and Equipment, Net Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfPropertyPlantAndEquipmentExplanatory
282 Implied Table Table

*

*

implied:Table
283 Text block [abstract] Abstract pkx:TextBlockAbstract
284 Property, Plant and Equipment, Net Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
285 1021 - Disclosure - Goodwill and Other Intangible Assets, Net Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIntangibleAssetsExplanatory
286 Implied Table Table

*

*

implied:Table
287 Text block [abstract] Abstract pkx:TextBlockAbstract
288 Goodwill and Other Intangible Assets, Net Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIntangibleAssetsExplanatory
289 1022 - Disclosure - Other Assets Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherAssetsExplanatory
290 Implied Table Table

*

*

implied:Table
291 Text block [abstract] Abstract pkx:TextBlockAbstract
292 Other Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherAssetsExplanatory
293 1023 - Disclosure - Borrowings Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfBorrowingsExplanatory
294 Implied Table Table

*

*

implied:Table
295 Text block [abstract] Abstract pkx:TextBlockAbstract
296 Borrowings Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBorrowingsExplanatory
297 1024 - Disclosure - Other Payables Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherPayablesExplanatory
298 Implied Table Table

*

*

implied:Table
299 Text block [abstract] Abstract pkx:TextBlockAbstract
300 Other Payables Concept (Text Block (HTML)) For Period pkx:DisclosureOfOtherPayablesExplanatory
301 1025 - Disclosure - Other Financial Liabilities Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherFinancialLiabilitiesExplanatory
302 Implied Table Table

*

*

implied:Table
303 Text block [abstract] Abstract pkx:TextBlockAbstract
304 Other Financial Liabilities Concept (Text Block (HTML)) For Period pkx:DisclosureOfOtherFinancialLiabilitiesExplanatory
305 1026 - Disclosure - Provisions Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherProvisionsExplanatory
306 Implied Table Table

*

*

implied:Table
307 Text block [abstract] Abstract pkx:TextBlockAbstract
308 Provisions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherProvisionsExplanatory
309 1027 - Disclosure - Employee Benefits Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEmployeeBenefitsExplanatory
310 Implied Table Table

*

*

implied:Table
311 Text block [abstract] Abstract pkx:TextBlockAbstract
312 Employee Benefits Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEmployeeBenefitsExplanatory
313 1028 - Disclosure - Other Liabilities Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherLiabilitiesExplanatory
314 Implied Table Table

*

*

implied:Table
315 Text block [abstract] Abstract pkx:TextBlockAbstract
316 Other Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherLiabilitiesExplanatory
317 1029 - Disclosure - Financial Instruments Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfFinancialInstrumentsExplanatory
318 Implied Table Table

*

*

implied:Table
319 Text block [abstract] Abstract pkx:TextBlockAbstract
320 Financial Instruments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
321 1030 - Disclosure - Share Capital and Capital Surplus Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIssuedCapitalExplanatory
322 Implied Table Table

*

*

implied:Table
323 Text block [abstract] Abstract pkx:TextBlockAbstract
324 Share Capital and Capital Surplus Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIssuedCapitalExplanatory
325 1031 - Disclosure - Hybrid Bonds Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfHybridBondsExplanatory
326 Implied Table Table

*

*

implied:Table
327 Text block [abstract] Abstract pkx:TextBlockAbstract
328 Hybrid Bonds Concept (Text Block (HTML)) For Period pkx:DisclosureOfHybridBondsExplanatory
329 1032 - Disclosure - Reserves Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfReservesAndOtherEquityInterestExplanatory
330 Implied Table Table

*

*

implied:Table
331 Text block [abstract] Abstract pkx:TextBlockAbstract
332 Reserves Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfReservesAndOtherEquityInterestExplanatory
333 1033 - Disclosure - Treasury Shares Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfTreasurySharesExplanatory
334 Implied Table Table

*

*

implied:Table
335 Text block [abstract] Abstract pkx:TextBlockAbstract
336 Treasury Shares Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTreasurySharesExplanatory
337 1034 - Disclosure - Revenue Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfRevenueExplanatory
338 Implied Table Table

*

*

implied:Table
339 Text block [abstract] Abstract pkx:TextBlockAbstract
340 Revenue Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRevenueExplanatory
341 1035 - Disclosure - Revenue - Contract Balances Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfContractBalancesOfRevenueFromContractsWithCustomersExplanatory
342 Implied Table Table

*

*

implied:Table
343 Text block [abstract] Abstract pkx:TextBlockAbstract
344 Revenue - Contract Balances Concept (Text Block (HTML)) For Period pkx:DisclosureOfContractBalancesOfRevenueFromContractsWithCustomersExplanatory
345 1036 - Disclosure - Selling and Administrative Expenses Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfSellingAndAdministrativeExpensesExplanatory
346 Implied Table Table

*

*

implied:Table
347 Text block [abstract] Abstract pkx:TextBlockAbstract
348 Selling and Administrative Expenses Concept (Text Block (HTML)) For Period pkx:DisclosureOfSellingAndAdministrativeExpensesExplanatory
349 1037 - Disclosure - Research and Development Expenditures Recognized as Expenses Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfResearchAndDevelopmentExpenseExplanatory
350 Implied Table Table

*

*

implied:Table
351 Text block [abstract] Abstract pkx:TextBlockAbstract
352 Research and Development Expenditures Recognized as Expenses Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfResearchAndDevelopmentExpenseExplanatory
353 1038 - Disclosure - Other Operating Income and Expenses Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherOperatingIncomeExpenseExplanatory
354 Implied Table Table

*

*

implied:Table
355 Text block [abstract] Abstract pkx:TextBlockAbstract
356 Other Operating Income and Expenses Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherOperatingIncomeExpenseExplanatory
357 1039 - Disclosure - Finance Income and Costs Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfFinanceIncomeExpenseExplanatory
358 Implied Table Table

*

*

implied:Table
359 Text block [abstract] Abstract pkx:TextBlockAbstract
360 Finance Income and Costs Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceIncomeExpenseExplanatory
361 1040 - Disclosure - Expenses by Nature Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfExpensesByNatureExplanatory
362 Implied Table Table

*

*

implied:Table
363 Text block [abstract] Abstract pkx:TextBlockAbstract
364 Expenses by Nature Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfExpensesByNatureExplanatory
365 1041 - Disclosure - Income Taxes Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIncomeTaxExplanatory
366 Implied Table Table

*

*

implied:Table
367 Text block [abstract] Abstract pkx:TextBlockAbstract
368 Income Taxes Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIncomeTaxExplanatory
369 1042 - Disclosure - Earnings per Share Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEarningsPerShareExplanatory
370 Implied Table Table

*

*

implied:Table
371 Text block [abstract] Abstract pkx:TextBlockAbstract
372 Earnings per Share Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEarningsPerShareExplanatory
373 1043 - Disclosure - Related Party Transactions Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfRelatedPartyExplanatory
374 Implied Table Table

*

*

implied:Table
375 Text block [abstract] Abstract pkx:TextBlockAbstract
376 Related Party Transactions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRelatedPartyExplanatory
377 1044 - Disclosure - Commitments and Contingencies Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCommitmentsAndContingentLiabilitiesExplanatory
378 Implied Table Table

*

*

implied:Table
379 Text block [abstract] Abstract pkx:TextBlockAbstract
380 Commitments and Contingencies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory
381 1045 - Disclosure - Additional Information of Cash Flow Statements Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCashFlowStatementExplanatory
382 Implied Table Table

*

*

implied:Table
383 Text block [abstract] Abstract pkx:TextBlockAbstract
384 Additional Information of Cash Flow Statements Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashFlowStatementExplanatory
385 1046 - Disclosure - Operating Segments and Geographic Information Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEntityOperatingSegmentsAndGeographicInformationExplanatory
386 Implied Table Table

*

*

implied:Table
387 Text block [abstract] Abstract pkx:TextBlockAbstract
388 Operating Segments and Geographic Information Concept (Text Block (HTML)) For Period pkx:DisclosureOfEntityOperatingSegmentsAndGeographicInformationExplanatory
389 1047 - Disclosure - Summary of Significant Accounting Policies (Policies) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfSummaryOfSignificantAccountingPoliciesExplanatoryPolicies
390 Implied Table Table

*

*

implied:Table
391 Text block [abstract] Abstract pkx:TextBlockAbstract
392 Basis of consolidation Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBasisOfConsolidationExplanatory
393 Foreign currency transactions and translation Concept (Text Block (HTML)) For Period pkx:DescriptionOfAccountingPolicyForForeignCurrencyTransactionsAndTranslationExplanatory
394 Cash and cash equivalents Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents
395 Non-derivative financial assets Concept (Text Block (HTML)) For Period pkx:DescriptionOfAccountingPolicyForNonderivativeFinancialAssetsExplanatory
396 Inventories Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories
397 Non-current assets held for sale Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory
398 Investment property Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForInvestmentPropertyExplanatory
399 Property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
400 Borrowing costs Concept (Text Block (HTML)) For Period pkx:DescriptionOfAccountingPolicyForCapitalizedBorrowingCostsExplanatory
401 Intangible assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory
402 Exploration for and evaluation of mineral resources Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForExplorationAndEvaluationExpenditures
403 Government grants Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForGovernmentGrants
404 Leases Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
405 Impairment for financial assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfFinancialAssetsExplanatory
406 Impairment for non-financial assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory
407 Derivative financial instruments, including hedge accounting Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForDerivativeFinancialInstrumentsAndHedgingExplanatory
408 Non-derivative financial liabilities Concept (Text Block (HTML)) For Period pkx:DescriptionOfAccountingPolicyForNonderivativeFinancialLiabilitiesExplanatory
409 Construction work in progress Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForConstructionInProgressExplanatory
410 Employee benefits Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory
411 Provisions Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
412 Emission Rights Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEmissionRightsExplanatory
413 Equity instruments Concept (Text Block (HTML)) For Period pkx:DescriptionOfAccountingPolicyForEquityInstrumentsExplanatory
414 Revenue from contracts with customers Concept (Text Block (HTML)) For Period pkx:DescriptionOfAccountingPolicyForRevenueFromContractsWithCustomersExplanatory
415 Finance income and finance costs Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinanceIncomeAndCostsExplanatory
416 Income taxes Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
417 Earnings per share Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
418 Operating segments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory
419 New standards and interpretations not yet adopted Concept (Text Block (HTML)) For Period pkx:DescriptionOfAccountingPolicyForNewStandardsAndInterpretationNotYetAdoptedExplanatory
420 1048 - Disclosure - General Information (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfGeneralInformationAboutFinancialStatementsExplanatoryTables
421 Implied Table Table

*

*

implied:Table
422 Text block [abstract] Abstract pkx:TextBlockAbstract
423 POSCO's Shareholders Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailsOfShareholdersExplanatory
424 Details of Consolidated Subsidiaries Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory
425 Details of Non-controlling Interest Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNoncontrollingInterestsExplanatory
426 Details of Associates Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInterestsInAssociatesExplanatory
427 Details of Joint Ventures Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfJointVenturesExplanatory
428 Consolidated Subsidiaries Acquired or Newly Established Concept (Text Block (HTML)) For Period pkx:ConsolidatedSubsidiariesAcquiredOrNewlyEstablishedExplanatory
429 Subsidiaries That Were Excluded From Consolidation Concept (Text Block (HTML)) For Period pkx:DisclosureOfSubsidiariesExcludedFromConsolidationExplanatory
430 1049 - Disclosure - Statement of Compliance (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfStatementOfComplianceExplanatoryTables
431 Implied Table Table

*

*

implied:Table
432 Text block [abstract] Abstract pkx:TextBlockAbstract
433 Summary of Impact on Net of Tax on Transition to New Update on Retained Earnings and Non-controlling Interests Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfInitialApplicationOfStandardsOrInterpretations
434 Summary of Effects of Adoption of IFRS No. 15 to Company's Consolidated Statements of Financial Position and Consolidated Statements of Comprehensive Income Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretations
435 Summary of Impact, Net of Tax, of Transition to IFRS No. 9 on Reserves, Retained Earnings and Non-Controlling Interests Concept (Text Block (HTML)) For Period pkx:DisclosureOfImpactNetOfTaxOfTransitionToIFRSNo9OnReservesRetainedEarningsAndNoncontrollingInterestsExplanatory
436 Summary of Initial Application, Measurement Categories and Carrying Amounts of Financial Assets in Accordance with IAS No. 39 and IFRS No. 9 Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfReclassificationOfFinancialInstrumentsExplanatory
437 1050 - Disclosure - Summary of Significant Accounting Policies (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfSummaryOfSignificantAccountingPoliciesExplanatoryTables
438 Implied Table Table

*

*

implied:Table
439 Text block [abstract] Abstract pkx:TextBlockAbstract
440 Estimated Useful Lives of Property, Plant and Equipment Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentEstimatedUsefulLivesExplanatory
441 Estimated Useful Lives of Intangible Assets Concept (Text Block (HTML)) For Period pkx:DisclosureOfIntangibleAssetsEstimatedUsefulLivesExplanatory
442 1051 - Disclosure - Financial risk management (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfFinancialRiskManagementExplanatoryTables
443 Implied Table Table

*

*

implied:Table
444 Text block [abstract] Abstract pkx:TextBlockAbstract
445 Net Borrowing-to-Equity Ratio Concept (Text Block (HTML)) For Period pkx:DisclosureOfNetDebtToEquityRatioExplanatory
446 1052 - Disclosure - Cash and Cash Equivalents (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCashAndCashEquivalentsExplanatoryTables
447 Implied Table Table

*

*

implied:Table
448 Text block [abstract] Abstract pkx:TextBlockAbstract
449 Summary of Cash and Cash Equivalents Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailedInformationAboutCashAndCashEquivalentsExplanatory
450 1053 - Disclosure - Other Receivables (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherReceivablesExplanatoryTables
451 Statement [table] Table

*

*

pkx:StatementTable
452 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
453 Financial assets [Member] Member ifrs-full:FinancialAssetsMember
454 Other receivables [member] Member pkx:OtherReceivablesMember
455 Others [member] Member pkx:OtherFinancialAssetMember
456 Trade accounts and notes receivables, net [member] Member pkx:TradeAccountsAndNotesReceivablesMember
457 Finance lease receivables [member] Member pkx:FinanceLeaseReceivablesMember
458 Statement [LineItems] LineItems pkx:StatementLineItems
459 Summary of Financial Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialAssetsExplanatory
460 1054 - Disclosure - Trade Accounts and Notes Receivable (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfTradeAccountsAndNotesReceivableExplanatoryTables
461 Implied Table Table

*

*

implied:Table
462 Text block [abstract] Abstract pkx:TextBlockAbstract
463 Gross Amount and Present Value of Minimum Lease Payments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLessorExplanatory
464 1055 - Disclosure - Inventories (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfInventoriesExplanatoryTables
465 Implied Table Table

*

*

implied:Table
466 Text block [abstract] Abstract pkx:TextBlockAbstract
467 Summary of Inventories Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailedInformationAboutInventoriesExplanatory
468 Changes of Allowance for Inventories Valuation Concept (Text Block (HTML)) For Period pkx:DisclosureOfAllowanceForInventoriesValuationExplanatory
469 1056 - Disclosure - Assets Held for Sale (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatoryTables
470 Implied Table Table

*

*

implied:Table
471 Text block [abstract] Abstract pkx:TextBlockAbstract
472 Details of Assets Held For Sale and Related Liabilities Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailedInformationAboutAssetsAndLiabilitiesHeldForSaleExplanatory
473 1057 - Disclosure - Investments in Associates and Joint ventures (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatoryTables
474 Implied Table Table

*

*

implied:Table
475 Text block [abstract] Abstract pkx:TextBlockAbstract
476 Summary of Investments in Associates and Joint Ventures Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailedInformationAboutInvestmentsInAssociatesAndJointVenturesExplanatory
477 Details of Investments in Associates Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesExplanatory
478 Details of Investments in Joint Ventures Concept (Text Block (HTML)) For Period pkx:DisclosureOfSignificantInvestmentsInJointVenturesExplanatory
479 Movements of Investments in Associates and Joint Ventures Concept (Text Block (HTML)) For Period pkx:DisclosureOfMovementsOfInvestmentsInAssociatesAndJointVenturesExplanatory
480 Summarized Financial Information of Associates and Joint Ventures Concept (Text Block (HTML)) For Period pkx:DisclosureOfReconciliationOfSummarizedFinancialInformationOfAssociatesAndJointVenturesExplanatory
481 1058 - Disclosure - Joint Operations (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfJointOperationsExplanatoryTables
482 Implied Table Table

*

*

implied:Table
483 Investments accounted for using equity method [abstract] Abstract ifrs-full:InvestmentsAccountedForUsingEquityMethodAbstract
484 Details of Significant Joint Operations Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailedInformationAboutJointOperationsExplanatory
485 1059 - Disclosure - Investment Property, Net (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfInvestmentPropertyExplanatoryTables
486 Implied Table Table

*

*

implied:Table
487 Text block [abstract] Abstract pkx:TextBlockAbstract
488 Summary of Investment Property Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutInvestmentPropertyExplanatory
489 Changes in Carrying Amount of Investment Property Concept (Text Block (HTML)) For Period pkx:DisclosureOfChangesInInvestmentPropertyExplanatory
490 1060 - Disclosure - Property, Plant and Equipment, Net (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfPropertyPlantAndEquipmentExplanatoryTables
491 Implied Table Table

*

*

implied:Table
492 Text block [abstract] Abstract pkx:TextBlockAbstract
493 Summary of Property, Plant and Equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
494 Changes in Carrying Amount of Property, Plant and Equipment Concept (Text Block (HTML)) For Period pkx:DisclosureOfChangesInCarryingValueOfPropertyPlantAndEquipmentExplanatory
495 Borrowing Costs Capitalized and Capitalized Interest Rate Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBorrowingCostsExplanatory
496 Property, Plant and Equipment and Investment Property Pledged as Collateral Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCollateralExplanatory
497 1061 - Disclosure - Goodwill and Other Intangible Assets, Net (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIntangibleAssetsExplanatoryTables
498 Implied Table Table

*

*

implied:Table
499 Text block [abstract] Abstract pkx:TextBlockAbstract
500 Summary of Goodwill and Other Intangible Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIntangibleAssetsAndGoodwillExplanatory
501 Changes in Carrying Amount of Goodwill and Other Intangible Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory
502 Allocation of Goodwill to Individually Operating Entities Which are Determined to be CGUs Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesExplanatory
503 1062 - Disclosure - Other Assets (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherAssetsExplanatoryTables
504 Implied Table Table

*

*

implied:Table
505 Text block [abstract] Abstract pkx:TextBlockAbstract
506 Summary of Other Current Assets and Other Non-Current Assets Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailedInformationAboutOtherAssetsExplanatory
507 1063 - Disclosure - Borrowings (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfBorrowingsExplanatoryTables
508 Statement [table] Table

*

*

pkx:StatementTable
509 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
510 Borrowings [Member] Member ifrs-full:BorrowingsByNameMember
511 Short-term borrowings and current portion of long-term borrowings [member] Member pkx:ShortTermBorrowingsAndCurrentPortionOfLongTermBorrowingsMember
512 Long-term borrowings [member] Member ifrs-full:LongtermBorrowingsMember
513 Statement [LineItems] LineItems pkx:StatementLineItems
514 Summary of Borrowings Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory
515 Summary of Assets Pledges as Collateral Concept (Text Block (HTML)) For Period pkx:DisclosureOfAssetsPledgedAsCollateralExplanatory
516 1064 - Disclosure - Other Payables (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherPayablesExplanatoryTables
517 Statement [table] Table

*

*

pkx:StatementTable
518 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
519 Financial liabilities [Member] Member ifrs-full:FinancialLiabilitiesMember
520 Other payables [member] Member pkx:OtherPayablesMember
521 Statement [LineItems] LineItems pkx:StatementLineItems
522 Summary of Financial Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialLiabilitiesExplanatory
523 1065 - Disclosure - Provisions (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherProvisionsExplanatoryTables
524 Implied Table Table

*

*

implied:Table
525 Text block [abstract] Abstract pkx:TextBlockAbstract
526 Summary of Provisions Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailedInformationAboutOtherProvisionsExplanatory
527 Changes in Provisions Concept (Text Block (HTML)) For Period pkx:DisclosureOfChangesInProvisionsExplanatory
528 1066 - Disclosure - Employee Benefits (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEmployeeBenefitsExplanatoryTables
529 Implied Table Table

*

*

implied:Table
530 Text block [abstract] Abstract pkx:TextBlockAbstract
531 Expense Related to Post-employment Benefit Plans under Defined Contribution Plans Concept (Text Block (HTML)) For Period pkx:DisclosureOfDefinedContributionPlanExplanatory
532 Amounts Recognized in Relation to Net Defined Benefit Liabilities in Statements of Financial Position Concept (Text Block (HTML)) For Period pkx:DisclosureOfAmountRecognizedInRelationToNetDefinedBenefitLiabilitiesInStatementOfFinancialPositionExplanatory
533 Changes in Present Value of Defined Benefit Obligations and Fair Value of Plan Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory
534 Fair Value of Plan Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFairValueOfPlanAssetsExplanatory
535 Amounts Recognized in Consolidated Statements of Comprehensive Income Concept (Text Block (HTML)) For Period pkx:DisclosureOfDefinedBenefitPlansExpenseRecognizedInStatementsOfComprehensiveIncomeExplanatory
536 Accumulated Actuarial Gains (Losses), Net of Tax Recognized in Other Comprehensive Income Concept (Text Block (HTML)) For Period pkx:DisclosureOfAccumulatedActuarialGainsLossesNetOfTaxRecognizedInOtherComprehensiveIncomeExplanatory
537 Principal Actuarial Assumptions Concept (Text Block (HTML)) For Period pkx:DisclosureOfPrincipalActuarialAssumptionsExplanatory
538 Changes to Defined Benefit Obligation Due to Reasonably Possible Changes to one of the Relevant Actuarial Assumptions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsExplanatory
539 Maturity of Expected Benefit Payments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInformationAboutMaturityProfileOfDefinedBenefitObligationExplanatory
540 1067 - Disclosure - Other Liabilities (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherLiabilitiesExplanatoryTables
541 Implied Table Table

*

*

implied:Table
542 Text block [abstract] Abstract pkx:TextBlockAbstract
543 Summary of Other Liabilities Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailedInformationAboutOtherLiabilitiesExplanatory
544 1068 - Disclosure - Financial Instruments (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfFinancialInstrumentsExplanatoryTables
545 Statement [table] Table

*

*

pkx:StatementTable
546 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
547 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
548 Level 3 [member] Member ifrs-full:Level3OfFairValueHierarchyMember
549 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
550 Risks [member] Member ifrs-full:TypesOfRisksMember
551 Currency risk [member] Member ifrs-full:CurrencyRiskMember
552 Interest rate risk [member] Member ifrs-full:InterestRateRiskMember
553 Statement [LineItems] LineItems pkx:StatementLineItems
554 Summary of Carrying Amount and Fair Values of Financial Assets and Financial Liabilities by Fair value Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFairValueOfFinancialAssetsAndFinancialLiabilitiesAndReclassificationExplanatory
555 Value Measurement Method and Significant but not Observable Inputs for the Financial Assets Classified as Fair Value Hierarchy Level 3 Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsExplanatory
556 Sensitivity Analysis of Financial Assets and Financial Liabilities Classified as Level 3 of Fair Value Hierarchy Concept (Text Block (HTML)) For Period pkx:DisclosureOfSensitivityAnalysisOfFinancialAssetsClassifiedAsLevel3OfFairValueHierarchyExplanatory
557 Fair Values of Financial Assets and Financial Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFairValueOfFinancialInstrumentsExplanatory
558 Finance Income and Costs by Category of Financial Instruments Concept (Text Block (HTML)) For Period pkx:DisclosureOfFinanceIncomeAndCostsByCategoryOfFinancialInstrumentsExplanatory
559 Maximum Exposure to Credit Risk Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCreditRiskExposureExplanatory
560 Allowance for Doubtful Accounts Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAllowanceForCreditLossesExplanatory
561 Impairment Losses on Financial Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossExplanatory
562 Aging and Impairment Losses of Trade Accounts and Notes Receivable and Other Receivables Concept (Text Block (HTML)) For Period ifrs-full:AnalysisOfAgeOfFinancialAssetsThatArePastDueButNotImpaired
563 Changes in Allowance for Doubtful Accounts Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsExplanatory
564 Contractual Maturities for Non-derivative Financial Liabilities Concept (Text Block (HTML)) For Period ifrs-full:MaturityAnalysisForNonderivativeFinancialLiabilities
565 Contractual Maturities Analysis of Derivative Financial Liabilities Concept (Text Block (HTML)) For Period ifrs-full:MaturityAnalysisForDerivativeFinancialLiabilities
566 Market Risk Exposure Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsExplanatory
567 Sensitivity Analysis for Market Risk Concept (Text Block (HTML)) For Period ifrs-full:SensitivityAnalysisForEachTypeOfMarketRisk
568 1069 - Disclosure - Share Capital and Capital Surplus (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIssuedCapitalExplanatoryTables
569 Implied Table Table

*

*

implied:Table
570 Text block [abstract] Abstract pkx:TextBlockAbstract
571 Summary of Share Capital Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfClassesOfShareCapitalExplanatory
572 Changes in Issued Common Stock Concept (Text Block (HTML)) For Period pkx:DisclosureOfReconciliationOfNumberOfSharesOutstandingExplanatory
573 Summary of Capital Surplus Concept (Text Block (HTML)) For Period pkx:DisclosureOfCapitalSurplusExplanatory
574 Summary of Redeemable Convertible Preferred Shares Concept (Text Block (HTML)) For Period pkx:DisclosureOfRedeemableConvertiblePreferredSharesExplanatory
575 1070 - Disclosure - Hybrid Bonds (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfHybridBondsExplanatoryTables
576 Statement [table] Table

*

*

pkx:StatementTable
577 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
578 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
579 POSCO ENERGY CO., LTD. [member] Member pkx:POSCOENERGYCOLTDMember
580 Statement [LineItems] LineItems pkx:StatementLineItems
581 Summary of Hybrid Bonds Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailedInformationOnHybridBondsClassifiedAsEquityExplanatory
582 1071 - Disclosure - Reserves (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfReservesAndOtherEquityInterestExplanatoryTables
583 Statement [table] Table

*

*

pkx:StatementTable
584 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
585 Equity [member] Member ifrs-full:EquityMember
586 Unrealized fair value of available-for-sale investments [member] Member ifrs-full:ReserveOfGainsAndLossesOnRemeasuringAvailableforsaleFinancialAssetsMember
587 Statement [LineItems] LineItems pkx:StatementLineItems
588 Summary of Reserves Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailedInformationAboutReservesExplanatory
589 1072 - Disclosure - Treasury Shares (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfTreasurySharesExplanatoryTables
590 Implied Table Table

*

*

implied:Table
591 Text block [abstract] Abstract pkx:TextBlockAbstract
592 Changes in Treasury Shares Concept (Text Block (HTML)) For Period pkx:DisclosureOfChangesInTreasurySharesExplanatory
593 1073 - Disclosure - Revenue (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfRevenueExplanatoryTables
594 Implied Table Table

*

*

implied:Table
595 Text block [abstract] Abstract pkx:TextBlockAbstract
596 Summary of Revenue Disaggregated by Types of Revenue and Timing of Revenue Recognition Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersExplanatory
597 Summary of Contract Assets and Liabilities From Contracts With Customers Concept (Text Block (HTML)) For Period ifrs-full:ExplanationOfSignificantChangesInContractAssetsAndContractLiabilitiesExplanatory
598 1074 - Disclosure - Revenue - Contract Balances (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfContractBalancesOfRevenueFromContractsWithCustomersExplanatoryTables
599 Implied Table Table

*

*

implied:Table
600 Text block [abstract] Abstract pkx:TextBlockAbstract
601 Summary of In-Progress Contracts Concept (Text Block (HTML)) For Period pkx:DisclosureOfInProgressContractsExplanatory
602 Summary of Due From Customers for Contract Work and Due to Customers for Contract Work Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailedInformationAboutAmountsDueFromToCustomersForContractWorkExplanatory
603 Summary of Changes in Estimated Total Contract Costs and Impact on Profit or Loss Concept (Text Block (HTML)) For Period pkx:DisclosureOfChangesInEstimatedTotalContractCostsAndImpactOnProfitOrLossExplanatory
604 Summary of Significant Assumptions Including Uncertainty of Estimate of Total Contract Costs Concept (Text Block (HTML)) For Period pkx:DisclosureOfSignificantAssumptionsIncludingUncertaintyOfEstimateOfTotalContractCostsExplanatory
605 1075 - Disclosure - Selling and Administrative Expenses (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfSellingAndAdministrativeExpensesExplanatoryTables
606 Implied Table Table

*

*

implied:Table
607 Text block [abstract] Abstract pkx:TextBlockAbstract
608 Summary of Other Administrative Expenses Concept (Text Block (HTML)) For Period pkx:DisclosureOfAdministrativeExpensesExplanatory
609 Summary of Selling Expenses Concept (Text Block (HTML)) For Period pkx:DisclosureOfSellingExpensesExplanatory
610 1076 - Disclosure - Research and Development Expenditures Recognized as Expenses (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfResearchAndDevelopmentExpenseExplanatoryTables
611 Implied Table Table

*

*

implied:Table
612 Text block [abstract] Abstract pkx:TextBlockAbstract
613 Summary of Research and Development Expenditures Recognized as Expenses Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailedInformationOfResearchAndDevelopmentExpenseExplanatory
614 1077 - Disclosure - Other Operating Income and Expenses (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfOtherOperatingIncomeExpenseExplanatoryTables
615 Implied Table Table

*

*

implied:Table
616 Text block [abstract] Abstract pkx:TextBlockAbstract
617 Details of Other Operating Income and Expenses Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailedInformationAboutOtherOperatingIncomeAndExpensesExplanatory
618 1078 - Disclosure - Finance Income and Costs (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfFinanceIncomeExpenseExplanatoryTables
619 Implied Table Table

*

*

implied:Table
620 Text block [abstract] Abstract pkx:TextBlockAbstract
621 Details of Finance Income and Costs Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailsOfFinanceIncomeCostsExplanatory
622 1079 - Disclosure - Expenses by Nature (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfExpensesByNatureExplanatoryTables
623 Implied Table Table

*

*

implied:Table
624 Text block [abstract] Abstract pkx:TextBlockAbstract
625 Summary of Expenses by Nature Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailedInformationAboutExpensesByNatureExplanatory
626 1080 - Disclosure - Income Taxes (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIncomeTaxExplanatoryTables
627 Implied Table Table

*

*

implied:Table
628 Text block [abstract] Abstract pkx:TextBlockAbstract
629 Summary of Income Tax Expense Concept (Text Block (HTML)) For Period pkx:DisclosureOfDetailedInformationAboutIncomeTaxExpenseExplanatory
630 Income Tax Credit (Charged) Directly to Equity Concept (Text Block (HTML)) For Period pkx:DisclosureOfIncomeTaxesCreditedChargedDirectlyToEquityExplanatory
631 Reconciliation Of Calculated Income Tax Expense Based on the Statutory Rate to Actual Amount of Taxes Recorded Concept (Text Block (HTML)) For Period pkx:DisclosureOfReconciliationOfEffectiveAndApplicableIncomeTaxExpensesExplanatory
632 Movements in Deferred Tax Assets (Liabilities) Concept (Text Block (HTML)) For Period pkx:DisclosureOfChangesInDeferredTaxAssetsAndLiabilitiesExplanatory
633 Summary of Deferred Tax Assets And Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDeferredTaxesExplanatory
634 1081 - Disclosure - Earnings per Share (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEarningsPerShareExplanatoryTables
635 Implied Table Table

*

*

implied:Table
636 Text block [abstract] Abstract pkx:TextBlockAbstract
637 Basic And Diluted Earnings Per Share Concept (Text Block (HTML)) For Period ifrs-full:EarningsPerShareExplanatory
638 1082 - Disclosure - Related Party Transactions (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfRelatedPartyExplanatoryTables
639 Statement [table] Table

*

*

pkx:StatementTable
640 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
641 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
642 Posco [member] Member ifrs-full:ParentMember
643 Company, excluding the controlling company [member] Member pkx:CompanyExcludingParentMember
644 Statement [LineItems] LineItems pkx:StatementLineItems
645 Significant Transactions With Related Parties Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory
646 Related Account Balances With Related Parties Concept (Text Block (HTML)) For Period pkx:DisclosureOfAccountBalancesWithRelatedPartiesExplanatory
647 Significant Financial Transactions Between the Company, Excluding the Controlling Company, and Related Parties Concept (Text Block (HTML)) For Period pkx:DisclosureOfSignificantFinancialTransactionWithRelatedPartiesExplanatory
648 Details of Compensation to Key Management Officers Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInformationAboutKeyManagementPersonnelExplanatory
649 1083 - Disclosure - Commitments and Contingencies (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCommitmentsAndContingentLiabilitiesExplanatoryTables
650 Statement [table] Table

*

*

pkx:StatementTable
651 Classes of contingent liabilities [axis] Axis ifrs-full:ClassesOfContingentLiabilitiesAxis
652 Contingent liabilities [member] Member ifrs-full:ContingentLiabilitiesMember
653 Contingent liabilities on outstanding guarantees [member] Member ifrs-full:ContingentLiabilityForGuaranteesMember
654 Litigations in progress [member] Member ifrs-full:LegalProceedingsContingentLiabilityMember
655 Statement [LineItems] LineItems pkx:StatementLineItems
656 Summary of Contingent Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfContingentLiabilitiesExplanatory
657 1084 - Disclosure - Additional Information of Cash Flow Statements (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCashFlowStatementExplanatoryTables
658 Implied Table Table

*

*

implied:Table
659 Text block [abstract] Abstract pkx:TextBlockAbstract
660 Changes in Operating Assets and Liabilities Concept (Text Block (HTML)) For Period pkx:DisclosureOfAdjustmentsForCashFlowFromOperatingActivitiesExplanatory
661 Changes in Liabilities Arising from Financial Activities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesExplanatory
662 1085 - Disclosure - Operating Segments and Geographic Information (Tables) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEntityOperatingSegmentsAndGeographicInformationExplanatoryTables
663 Implied Table Table

*

*

implied:Table
664 Text block [abstract] Abstract pkx:TextBlockAbstract
665 Information about Reportable Segments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOperatingSegmentsExplanatory
666 Reconciliation of Segment Revenues, Profit or Loss, Assets and Liabilities and Other Significant Items Concept (Text Block (HTML)) For Period pkx:DisclosureOfReconciliationOfSegmentRevenuesProfitOrLossAssetsAndLiabilitiesAndOtherSignificantItemsExplanatoryExplanatory
667 Revenue and Non-current Assets by Geographic Area Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeographicalAreasExplanatory
668 1086 - Disclosure - General Information - Additional Information (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureGeneralInformationAdditionalInformation
669 Disclosure of general information [Table] Table

*

*

pkx:DisclosureOfGeneralInformationTable
670 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
671 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
672 Domestic [member] Member ifrs-full:CountryOfDomicileMember
673 Foreign [member] Member ifrs-full:ForeignCountriesMember
674 Korea [member] Member country:KR
675 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
676 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
677 POSCO DAEWOO Corporation POSMATE and others [member] Member pkx:POSCODAEWOOCorporationPOSMATEAndOthersMember
678 POSCO Gulf SFC LLC and others [member] Member pkx:POSCOGulfSFCLLCAndOthersMember
679 Disclosure of general information [Line Items] LineItems pkx:DisclosureOfGeneralInformationLineItems
680 Number of subsidiaries Concept (Integer) For Period pkx:NumberOfSubsidiaries
681 Number of associates and joint ventures Concept (Integer) For Period pkx:NumberOfAssociatesAndJointVentures
682 Number of operational steel plants Concept (Integer) For Period pkx:NumberOfOperationalSteelPlants
683 Number of operational offices Concept (Integer) For Period pkx:NumberOfOperationalOffices
684 Increase in ownership interests in subsidiaries Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl
685 Dividends paid by subsidiaries Concept (Monetary) For Period Debit ifrs-full:DividendsReceived
686 1087 - Disclosure - General Information - POSCO's Shareholders (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureGeneralInformationPOSCOsShareholders
687 Disclosure of details of shareholders [Table] Table

*

*

pkx:DisclosureOfDetailsOfShareholdersTable
688 Shareholder's by name [axis] Axis pkx:ShareholderByNameAxis
689 Shareholder's by name [member] Member pkx:ShareholderByNameMember
690 National Pension Service [member] Member pkx:NationalPensionServiceMember
691 Black rock fund advisors [member] Member pkx:BlackRockFundAdvisorsMember
692 Nippon Steel & Sumitomo Metal Corporation [member] Member pkx:NipponSteelAndSumitomoMetalCorporationMember
693 GIC private limited [member] Member pkx:GicPrivateLimitedMember
694 KB Financial Group Inc. and subsidiaries [member] Member pkx:KBFinancialGroupIncAndSubsidiariesMember
695 Other [member] Member pkx:OtherShareholdersMember
696 Disclosure of details of shareholders [line items] LineItems pkx:DisclosureOfDetailsOfShareholdersLineItems
697 Number of shares Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
698 Ownership (%) Concept (Percent) As Of pkx:PercentageOfOwnershipInterestByShareholdersInEntity
699 1088 - Disclosure - General Information - POSCO's Shareholders (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureGeneralInformationPOSCOsShareholdersParenthetical
700 Implied Table Table

*

*

implied:Table
701 Disclosure of Details of Shareholders [abstract] Abstract pkx:DisclosureOfDetailsOfShareholdersAbstract
702 Number of shares represented by ADRs Concept (Shares) As Of pkx:NumberOfSharesRepresentedByEachADRs
703 Common share par value Concept (Share) As Of ifrs-full:ParValuePerShare
704 1089 - Disclosure - General Information - Details of Consolidated Subsidiaries (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureGeneralInformationDetailsOfConsolidatedSubsidiaries
705 Disclosure of subsidiaries [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
706 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
707 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
708 Domestic [member] Member ifrs-full:CountryOfDomicileMember
709 Foreign [member] Member ifrs-full:ForeignCountriesMember
710 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
711 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
712 POSCO ENGINEERING & CONSTRUCTION CO., LTD. [member] Member pkx:POSCOENGINEERINGAndCONSTRUCTIONCOLTDMember
713 POSCO Processing & Service [member] Member pkx:POSCOProcessingAndServiceMember
714 POSCO COATED & COLOR STEEL Co., Ltd. [member] Member pkx:POSCOCOATEDAndCOLORSTEELCoLtdMember
715 POSCO ICT [member] Member pkx:POSCOICTMember
716 POSCO Research Institute [member] Member pkx:POSCOResearchInstituteMember
717 POSMATE [member] Member pkx:POSMATEMember
718 POSCO A&C [member] Member pkx:POSCOAAndCMember
719 POSCO Venture Capital Co., Ltd. [member] Member pkx:POSCOVentureCapitalCoLtdMember
720 eNtoB Corporation [member] Member pkx:eNtoBCorporationMember
721 POSCO CHEMTECH [member] Member pkx:POSCOCHEMTECHMember
722 POSCO-Terminal Co., Ltd. [member] Member pkx:POSCOTerminalCoLtdMember
723 POSCO M-TECH [member] Member pkx:POSCOMTECHMember
724 POSCO ENERGY CO., LTD. [member] Member pkx:POSCOENERGYCOLTDMember
725 POSCO NIPPON STEEL RHF JOINT VENTURE. CO., Ltd. [member] Member pkx:POSCONIPPONSTEELRHFJOINTVENTURECOLtdMember
726 MegaAsset Co., Ltd. [member] Member pkx:MegaAssetCoLtdMember
727 Future Creation Fund Postech Early Stage account [member] Member pkx:FutureCreationFundPostechEarlyStageAccountMember
728 POSCO WOMAN'S FUND [member] Member pkx:POSCOWOMANSFUNDMember
729 SPH Co, ltd [member] Member pkx:SPHCoLtdMember
730 Posco Group University [member] Member pkx:PoscoGroupUniversityMember
731 HOTEL LAONZENA [member] Member pkx:HOTELLAONZENAMember
732 Growth Ladder POSCO K-Growth Global Fund [member] Member pkx:GrowthLadderPOSCOKGrowthGlobalFundMember
733 2015 POSCO New technology II Fund [member] Member pkx:TwoThousandFifteenPOSCONewTechnologyIIFundMember
734 Posco e&c Songdo International Building [member] Member pkx:PoscoeAndcSongdoInternationalBuildingMember
735 POSCO ES MATERIALS CO., LTD. [member] Member pkx:POSCOESMATERIALSCOLTDMember
736 POSCO Research & Technology [member] Member pkx:PoscoResearchAndTechnologyMember
737 Poscoene [member] Member pkx:PoscoeneMember
738 POSCO Humans [member] Member pkx:POSCOHumansMember
739 Mapo Hibroad Parking Co., Ltd. [member] Member pkx:MapoHibroadParkingcoLtdMember
740 BLUE O&M Co., Ltd. [member] Member pkx:BLUEOAndMCoLtdMember
741 Busan E&E Co,. Ltd. [member] Member pkx:BusanEAndECoLtdMember
742 POSCO Family Strategy Fund [member] Member pkx:POSCOFamilyStrategyFundMember
743 POSCO DAEWOO Corporation [member] Member pkx:POSCODAEWOOCorporationMember
744 Pohang Scrap Recycling Distribution Center Co., Ltd. [member] Member pkx:PohangScrapRecyclingDistributionCenterCoLtdMember
745 PSC Energy Global Co., Ltd. [Member] Member pkx:PSCEnergyGlobalCoLtdMember
746 Suncheon Eco Trans Co., Ltd [member] Member pkx:SuncheonEcoTransCoLtdMember
747 Songdo Development PMC (Project Management Company) LLC. [member] Member pkx:SongdoDevelopmentProjectManagementCompanyLLCMember
748 Pospower Co Ltd [member] Member pkx:POSPOWERCoLtdMember
749 POCA STEM Co., Ltd [member] Member pkx:POCASTEMCoLtdMember
750 Kyobo Securities Bond Plus 6M Professional Private Equity Trust W-2 [member] Member pkx:KyoboSecuritiesBondPlusSixMProfessionalPrivateEquityTrustWTwoMember
751 Mirae Asset Smart Q Sigma 2.0 Professional Private Equity Trust [member] Member pkx:MiraeAssetSmartSigmaTwoPointZeroProfessionalPrivateEquityTrustMember
752 Kyobo Securities Bond Plus 6M Professional Private Equity Trust W-5 [member] Member pkx:KyoboSecuritiesBondPlus6mProfessionalPrivateEquityTrustWFiveMember
753 POSCO America Corporation [member] Member pkx:POSCOAmericaCorporationMember
754 POSCO AUSTRALIA PTY LTD [member] Member pkx:POSCOAUSTRALIAPTYLTDMember
755 POSCO Canada Ltd. [member] Member pkx:POSCOCanadaLtdMember
756 POSCAN Elkview [member] Member pkx:POSCANElkviewMember
757 POSCO Asia Co., Ltd. [member] Member pkx:POSCOAsiaCoLtdMember
758 POSCO-CTPC Co., Ltd. [member] Member pkx:POSCOCTPCCoLtdMember
759 POSCO E&C Vietnam Co., Ltd. [member] Member pkx:POSCOEAndCVietnamCoLtdMember
760 Zhangjiagang Pohang Stainless Steel Co., Ltd. [member] Member pkx:ZhangjiagangPohangStainlessSteelCoLtdMember
761 POSCO(Guangdong) Coated Steel Co., Ltd. [member] Member pkx:POSCOGuangdongCoatedSteelCoLtdMember
762 POSCO (Thailand) Company Limited [member] Member pkx:POSCOThailandCompanyLimitedMember
763 Myanmar POSCO Steel Co., Ltd [member] Member pkx:MyanmarPOSCOSteelCoLtdMember
764 POSCO-MKPC SDN BHD [member] Member pkx:POSCOMKPCSDNBHDMember
765 Qingdao Pohang Stainless Steel Co., Ltd. [member] Member pkx:QingdaoPohangStainlessSteelCoLtdMember
766 POSCO(Suzhou) Automotive Processing Center Co., Ltd. [member] Member pkx:POSCOSuzhouAutomotiveProcessingCenterCoLtdMember
767 POSCO-China Qingdao Processing Center Co., Ltd. [member] Member pkx:POSCOChinaQingdaoProcessingCenterCoLtdMember
768 POS-ORE PTY LTD [member] Member pkx:POSOREPTYLTDMember
769 POSCO-China Holding Corp. [member] Member pkx:POSCOChinaHoldingCorpMember
770 POSCO JAPAN Co., Ltd. [member] Member pkx:POSCOJAPANCoLtdMember
771 POS-CD PTY LTD [member] Member pkx:POSCDPTYLTDMember
772 POS-GC PTY LTD [member] Member pkx:POSGCPTYLTDMember
773 POSCO-India Private Limited [member] Member pkx:POSCOIndiaPrivateLimitedMember
774 POSCO-India Pune Processing Center. Pvt. Ltd. [member] Member pkx:POSCOIndiaPuneProcessingCenterPvtLtdMember
775 POSCO Japan PC CO., LTD. [member] Member pkx:POSCOJapanPCCOLTDMember
776 POSCO-CFPC Co., Ltd. [member] Member pkx:POSCOCFPCCoLtdMember
777 POSCO E&C CHINA Co., Ltd. [member] Member pkx:POSCOEAndCCHINACoLtdMember
778 POSCO MPPC S.A. de C.V. [member] Member pkx:POSCOMPPCSAdeCVMember
779 Zhangjigang Pohang Port Co., Ltd. [member] Member pkx:ZhangjigangPohangPortCoLtdMember
780 POSCO-VIETNAM Co., Ltd. [member] Member pkx:POSCOVIETNAMCoLtdMember
781 POSCO MEXICO S.A. DE C.V. [member] Member pkx:POSCOMEXICOSADECVMember
782 POSCO-Poland Wroclaw Processing Center Sp. z o. o. [member] Member pkx:POSCOPolandWroclawProcessingCenterSpzooMember
783 POS-NP PTY LTD [member] Member pkx:POSNPPTYLTDMember
784 POSCO DAEWOO WAIGAIQIAO SHANGHAI CO., LTD [member] Member pkx:POSCODAEWOOWAIGAIQIAOSHANGHAICOLTDMember
785 PT. Bio Inti Agrindo [member] Member pkx:PTBioIntiAgrindoMember
786 POSCO ENGINEERING AND CONSTRUCTION AUSTRALIA (POSCO E&C AUSTRALIA) PTY LTD [member] Member pkx:POSCOENGINEERINGANDCONSTRUCTIONAUSTRALIAPTYLTDMember
787 POSCO-TISCO (JILIN) PROCESSING CENTER Co., Ltd. [member] Member pkx:POSCOTISCOJILINPROCESSINGCENTERCoLtdMember
788 POSCO Thainox Public Company Limited [member] Member pkx:POSCOThainoxPublicCompanyLimitedMember
789 Hunchun Posco Hyundai Logistics [member] Member pkx:HunchunPoscoHyundaiLogisticsMember
790 POSCO DAEWOO VIETNAM CO., LTD [member] Member pkx:POSCODAEWOOVIETNAMCOLTDMember
791 POSCO(Chongqing) Automotive Processing Center Co., Ltd. [member] Member pkx:POSCOChongqingAutomotiveProcessingCenterCoLtdMember
792 SUZHOU POSCO-CORE TECHNOLOGY CO., LTD. [member] Member pkx:SUZHOUPOSCOCORETECHNOLOGYCOLTDMember
793 PT.Krakatau Posco Chemtech Calcination [member] Member pkx:PTKrakatauPoscoChemtechCalcinationMember
794 POSCO AFRICA (PROPRIETARY) LIMITED [member] Member pkx:POSCOAFRICAPROPRIETARYLIMITEDMember
795 POSCO ICT BRASIL [member] Member pkx:POSCOICTBRASILMember
796 LA-SRDC [member] Member pkx:LASRDCMember
797 POSCO Center Beijing [member] Member pkx:POSCOCenterBeijingMember
798 POSCO AMERICA COMERCIALIZADORA S DE RL DE CV [member] Member pkx:POSCOAMERICACOMERCIALIZADORASDERLDECVMember
799 POSCO(Guangdong) Automotive Steel Co., Ltd. [member] Member pkx:POSCOGuangdongAutomotiveSteelCoLtdMember
800 POSCO-Malaysia SDN. BHD. [member] Member pkx:POSCOMalaysiaSDNBHDMember
801 PT KRAKATAU BLUE WATER [member] Member pkx:PTKRAKATAUBLUEWATERMember
802 POSCO DAEWOO MYANMAR CORPORATION LIMITED [member] Member pkx:POSCODAEWOOMYANMARCORPORATIONLIMITEDMember
803 POSCO-Italy Processing Center [member] Member pkx:POSCOItalyProcessingCenterMember
804 POSCO DAEWOO E&P CANADA CORPORATION [member] Member pkx:POSCODAEWOOEAndPCANADACORPORATIONMember
805 Myanmar POSCO C&C Company, Limited [member] Member pkx:MyanmarPOSCOCAndCCompanyLimitedMember
806 POSCO ICT VIETNAM [member] Member pkx:POSCOICTVIETNAMMember
807 Daewoo Global Development. Pte., Ltd [member] Member pkx:DaewooGlobalDevelopmentPteLtdMember
808 Myanmar POSCO Engineering & Construction Company, Limited [member] Member pkx:MyanmarPOSCOEngineeringAndConstructionCompanyLimitedMember
809 POS-Minerals Corporation [member] Member pkx:POSMineralsCorporationMember
810 POSCO(Wuhu) Automotive Processing Center Co., Ltd. [member] Member pkx:POSCOWuhuAutomotiveProcessingCenterCoLtdMember
811 POSCO Engineering and Construction India Private Limited [member] Member pkx:POSCOEngineeringandConstructionIndiaPrivateLimitedMember
812 POSCO COATED STEEL (THAILAND) CO., LTD. [member] Member pkx:POSCOCOATEDSTEELTHAILANDCOLTDMember
813 Daewoo Amara Company Limited [member] Member pkx:DaewooAmaraCompanyLimitedMember
814 Daewoo Power and Infra (PTY) Limited [member] Member pkx:DaewooPowerAndInfraPTYLimitedMember
815 POSMATE-CHINA CO., LTD [member] Member pkx:POSMATECHINACOLTDMember
816 Daewoo Precious Resources Co., Ltd. [member] Member pkx:DaewooPreciousResourcesCoLtdMember
817 POSCO-Mexico Villagran Wire-rod Processing Center [member] Member pkx:POSCOMexicoVillagranWirerodProcessingCenterMember
818 POSCO ChengDu Processing Center [member] Member pkx:POSCOChengDuProcessingCenterMember
819 POSCO SUZHOU [member] Member pkx:POSCOSUZHOUMember
820 POSCO E&C SMART S DE RL DE CV [member] Member pkx:POSCOEAndCSMARTSDERLDECVMember
821 POSCO Philippine Manila Processing Center, Inc. [member] Member pkx:POSCOPhilippineManilaProcessingCenterIncMember
822 POSCO E&C HOLDINGS CO., Ltd. [member] Member pkx:POSCOEAndCHOLDINGSCOLtdMember
823 POSCO E&C (THAILAND) CO., Ltd. [member] Member pkx:POSCOEAndCTHAILANDCOLtdMember
824 DAEWOO POWER PNG Ltd. [member] Member pkx:DAEWOOPOWERPNGLtdMember
825 PT.Krakatau Posco Social Enterprise [member] Member pkx:PTKrakatauPoscoSocialEnterpriseMember
826 Ventanas Philippines Construction Inc [member] Member pkx:VentanasPhilippinesConstructionIncMember
827 POSCO E&C Mongolia [member] Member pkx:POSCOEAndCMongoliaMember
828 POSCO Gulf SFC LLC [member] Member pkx:POSCOGulfSFCLLCMember
829 SANPU TRADING Co., Ltd. [member] Member pkx:SANPUTRADINGCoLtdMember
830 Zhangjiagang BLZ Pohang International Trading [member] Member pkx:ZhangjiagangBLZPohangInternationalTradingMember
831 POSCO RU Limited Liability Company [member] Member pkx:PoscoRuLimitedLiabilityCompanyMember
832 Golden Lace DAEWOO Company Limited [member] Member pkx:GoldenLaceDaewooCompanyLimitedMember
833 POSCO ICT-China [member] Member pkx:POSCOICTChinaMember
834 Pos-Sea Pte Ltd [member] Member pkx:PosSeaPteLtdMember
835 POSCO Europe Steel Distribution Center [member] Member pkx:POSCOEuropeSteelDistributionCenterMember
836 POSCO ENGINEERING (THAILAND) CO., LTD. [member] Member pkx:POSCOENGINEERINGTHAILANDCOLTDMember
837 POSCO VST Co., Ltd. [member] Member pkx:POSCOVSTCOLTDMember
838 POSCO DAEWOO UKRAINE LLC [member] Member pkx:PoscoDaewooUkraineLlcMember
839 Zhangjiagang Pohang Refactories Co Ltd [member] Member pkx:ZhangjiagangPohangRefactoriesCoLtdMember
840 POSCO Maharashtra Steel Private Limited [member] Member pkx:POSCOMaharashtraSteelPrivateLimitedMember
841 POSCO INDIA HOLDINGS PRIVATE LIMITED [member] Member pkx:POSCOINDIAHOLDINGSPRIVATELIMITEDMember
842 POSCO TNPC Otomotiv Celik San. Ve Tic. A.S [member] Member pkx:POSCOTNPCOtomotivCelikSanVeTicASMember
843 POSCO VIETNAM HOLDINGS CO., LTD (formerly, POSCO VNPC Co., Ltd.) [member] Member pkx:PoscoVietnamHoldingsCoLtdFormerlyPoscoVnpcCoLtdMember
844 POSCO(Liaoning) Automotive [member] Member pkx:POSCOLiaoningAutomotiveMember
845 POSCO-Indonesia Jakarta Processing Center [member] Member pkx:POSCOIndonesiaJakartaProcessingCenterMember
846 PT.MRI [member] Member pkx:PTMRIMember
847 POSCO TMC INDIA PRIVATE LIMITED [member] Member pkx:POSCOTMCINDIAPRIVATELIMITEDMember
848 POSCO-AAPC [member] Member pkx:POSCOAAPCMember
849 POSCO(Yantai)Automotive Processing Center Co., Ltd. [member] Member pkx:POSCOYantaiAutomotiveProcessingCenterCoLtdMember
850 POSCO India Steel Distribution Center Private Ltd [member] Member pkx:POSCOIndiaSteelDistributionCenterPrivateLtdMember
851 POSCO China Dalian Plate Processing Center Co, Ltd [member] Member pkx:POSCOChinaDalianPlateProcessingCenterCoLtdMember
852 POSCO-South Asia Company Limited [member] Member pkx:POSCOSouthAsiaCompanyLimitedMember
853 POSCO SS-VINA Co., Ltd [member] Member pkx:POSCOSSVINACoLtdMember
854 PT.POSCO ICT INDONESIA [member] Member pkx:PTPOSCOICTINDONESIAMember
855 POSCO NCR Coal Ltd. [member] Member pkx:POSCONCRCoalLtdMember
856 POSCO WA PTY LTD [member] Member pkx:POSCOWAPTYLTDMember
857 POSCO DAEWOO AMERICA CORP. [member] Member pkx:POSCODAEWOOAMERICACORPMember
858 POSCO AUSTRALIA GP PTY LIMITED [member] Member pkx:POSCOAUSTRALIAGPPTYLIMITEDMember
859 POSCO DAEWOO POWER (PNGPOM) LTD. [member] Member pkx:POSCODAEWOOPOWERPNGPOMLTDMember
860 PT. Krakatau Posco Energy [member] Member pkx:PTKRAKATAUPOSCOENERGYMember
861 POSCO DAEWOO DEUTSCHLAND GMBH [member] Member pkx:POSCODAEWOODEUTSCHLANDGMBHMember
862 POSCO DAEWOO JAPAN Corp [member] Member pkx:POSCODAEWOOJAPANCorpMember
863 POSCO DAEWOO SINGAPORE PTE LTD. [member] Member pkx:POSCODAEWOOSINGAPOREPTELTDMember
864 POSCO DAEWOO ITALIA S.R.L. [member] Member pkx:POSCODAEWOOITALIASRLMember
865 POSCO DAEWOO CHINA CO., LTD. [member] Member pkx:POSCODAEWOOCHINACOLTDMember
866 Daewoo Textile LLC [member] Member pkx:DaewooTextileLLCMember
867 POSCO DAEWOO AUSTRALIA HOLDINGS PTY. LTD. [member] Member pkx:POSCODAEWOOAUSTRALIAHOLDINGSPTYLTDMember
868 POSCO MAURITIUS LIMITED [member] Member pkx:POSCOMAURITIUSLIMITEDMember
869 PT. KRAKATAU POSCO [member] Member pkx:PTKRAKATAUPOSCOMember
870 POSCO DAEWOO MEXICO S.A. DE C.V. [member] Member pkx:POSCODAEWOOMEXICOSADECVMember
871 Daewoo International Guangzhou Corp. [member] Member pkx:DaewooInternationalGuangzhouCorpMember
872 POSCO DAEWOO MALAYSIA SDN BHD [member] Member pkx:POSCODAEWOOMALAYSIASDNBHDMember
873 PT.POSCO-Indonesia Inti [member] Member pkx:PTPOSCOIndonesiaIntiMember
874 POSCO DAEWOO SHANGHAI CO., LTD. [member] Member pkx:POSCODAEWOOSHANGHAICOLTDMember
875 PGSF, L.P. [member] Member pkx:PGSFLPMember
876 POSCO DAEWOO INDIA PVT., LTD. [member] Member pkx:POSCODAEWOOINDIAPVTLTDMember
877 POSCO(Dalian) IT Center Development Co., Ltd. [member] Member pkx:POSCODalianITCenterDevelopmentCoLtdMember
878 PT. POSCO E&C INDONESIA [member] Member pkx:PTPOSCOEAndCINDONESIAMember
879 HUME COAL PTY LTD [member] Member pkx:HUMECOALPTYLTDMember
880 Brazil Sao Paulo Steel Processing Center [member] Member pkx:BrazilSaoPauloSteelProcessingCenterMember
881 DAESAN (CAMBODIA) Co., Ltd. [member] Member pkx:DAESANCAMBODIACoLtdMember
882 POSCO ENGINEERING & CONSTRUCTION DO BRAZIL LTDA. [member] Member pkx:POSCOENGINEERINGAndCONSTRUCTIONDOBRAZILLTDAMember
883 POSCO ASSAN TST STEEL INDUSTRY [member] Member pkx:POSCOASSANTSTSTEELINDUSTRYMember
884 HONG KONG POSCO E&C (CHINA) INVESTMENT Co., Ltd [member] Member pkx:HONGKONGPOSCOEAndCCHINAINVESTMENTCoLtdMember
885 POS-LT PTY LTD [member] Member pkx:POSLTPtyLtdMember
886 POSCO SINGAPORE LNG TRADING PTE. LTD [member] Member pkx:POSCOSINGAPORELNGTRADINGPTELTDMember
887 ZHEJIANG POSCO-HUAYOU ESM CO.,LTD [member] Member pkx:ZhejiangPoscoHuayouEsmCoLtdMember
888 POSCO Argentina S.A.U. [member] Member pkx:PoscoArgentinaSauMember
889 POSCO RUS LLC [member] Member pkx:POSCORUSLLCMember
890 POSCO-CDSFC [member] Member pkx:POSCOCDSFCMember
891 POSCO MESDC S.A. DE C.V. [member] Member pkx:POSCOMESDCSADECVMember
892 KIS Devonian Canada Corporation [member] Member pkx:KisDevonianCanadaCorporationMember
893 POSCO E&C VENEZUELA C.A. [member] Member pkx:POSCOEAndCVENEZUELACAMember
894 PT PEN INDONESIA [member] Member pkx:PTPENINDONESIAMember
895 POSCO Engineering and Construction - UZ [member] Member pkx:POSCOEngineeringAndConstructionUZMember
896 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
897 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
898 Posco [member] Member ifrs-full:ParentMember
899 Subsidiaries [member] Member ifrs-full:SubsidiariesMember
900 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
901 Principal operations Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities
902 Ownership (%) Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
903 Region Concept (Text/String) For Period ifrs-full:PrincipalPlaceOfBusinessOfSubsidiary
904 1090 - Disclosure - General Information - Details of Non-controlling Interest (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureGeneralInformationDetailsOfNoncontrollingInterest
905 Disclosure of subsidiaries [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
906 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
907 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
908 POSCO DAEWOO Corporation [member] Member pkx:POSCODAEWOOCorporationMember
909 PT. KRAKATAU POSCO [member] Member pkx:PTKRAKATAUPOSCOMember
910 POSCO CHEMTECH [member] Member pkx:POSCOCHEMTECHMember
911 POSCO ENGINEERING & CONSTRUCTION CO., LTD. [member] Member pkx:POSCOENGINEERINGAndCONSTRUCTIONCOLTDMember
912 POSCO ENERGY CO., LTD. [member] Member pkx:POSCOENERGYCOLTDMember
913 Others [member] Member pkx:OtherSubsidiariesMember
914 Non-controlling Interest [member] Member ifrs-full:SubsidiariesWithMaterialNoncontrollingInterestsMember
915 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
916 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
917 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
918 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
919 Non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
920 Equity Concept (Monetary) As Of Credit ifrs-full:Equity
921 Non-controlling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
922 Sales Concept (Monetary) For Period Credit ifrs-full:Revenue
923 Profit (loss) for the period Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
924 Profit (loss) attributable to non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
925 Cash flows from operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
926 Cash flows from investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
927 Cash flows from financing activities (before dividends to non-controlling interest) Concept (Monetary) For Period Debit pkx:CashFlowsFromUsedInFinancingActivitiesBeforeDividendsToNoncontrollingInterests
928 Dividend to non-controlling interest Concept (Monetary) For Period Credit ifrs-full:DividendsPaidToNoncontrollingInterestsClassifiedAsFinancingActivities
929 Effect of exchange rate fluctuation on cash held Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
930 Net increase (decrease) in cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
931 1091 - Disclosure - General Information - Details of Associates (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureGeneralInformationDetailsOfAssociates
932 Disclosure of associates [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
933 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
934 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
935 Domestic [member] Member ifrs-full:CountryOfDomicileMember
936 Foreign [member] Member ifrs-full:ForeignCountriesMember
937 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
938 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
939 New Songdo International City Development, LLC [member] Member pkx:NewSongdoInternationalCityDevelopmentLLCMember
940 Gale International Korea, LLC [member] Member pkx:GaleInternationalKoreaLLCMember
941 SNNC [member] Member pkx:SNNCMember
942 KONES, Corp. [member] Member pkx:KONESCorpMember
943 Chungju Enterprise City Development Co.,Ltd [member] Member pkx:CHUNGJUENTERPRISECITYDEVELOPMENTCoLtdMember
944 DAEHO GLOBAL MANAGEMENT CO., LTD. [member] Member pkx:DAEHOGLOBALMANAGEMENTCOLTDMember
945 Mokpo Deayang Industrial Corporation [member] Member pkx:MokpoDeayangIndustrialCorporationMember
946 Gunggi Green Energy [member] Member pkx:GunggiGreenEnergyMember
947 Pohang Special Welding Co.,Ltd. [member] Member pkx:PohangSpecialWeldingCoLtdMember
948 KoFC POSCO HANWHA KB Shared Growth No. 2. Private Equity Fund [member] Member pkx:KoFCPOSCOHANWHAKBSharedGrowthNO2PrivateEquityFundMember
949 EQP POSCO Global No1 Natural Resources Private Equity Fund [member] Member pkx:EQPPOSCOGlobalNO1NaturalResourcesPEFMember
950 KC Chemicals CORP [member] Member pkx:KCChemicalsCORPMember
951 Garolim Tidal Power Plant Co.,Ltd [member] Member pkx:GarolimTidalPowerPlantCoLtdMember
952 POSTECH Social Enterprise Fund [member] Member pkx:POSTECHSocialEnterpriseFundMember
953 QSONE Co.,Ltd. [member] Member pkx:QSONECoLtdMember
954 Chuncheon Energy Co., Ltd. [member] Member pkx:ChuncheonEnergyCoLtdMember
955 Keystone NO. 1. Private Equity Fund [member] Member pkx:KeystoneNo1PrivateEquityFundMember
956 Noeul Green Energy [member] Member pkx:NoeulGreenEnergyMember
957 Posco-IDV Growth Ladder IP Fund [member] Member pkx:PoscoIDVGrowthLadderIPFundMember
958 Daesung Steel [member] Member pkx:DaesungSteelMember
959 Pohang E&E Co,. Ltd. [member] Member pkx:PohangEAndECoLtdMember
960 POSCO Energy Valley Fund [member] Member pkx:POSCOEnergyValleyFundMember
961 2016 PoscoPlutus New Technology Investment Fund [member] Member pkx:TwoThousandSixteenPoscoPlutusNewTechnologyInvestmentFundMember
962 Hyundai Invest Guggenheim CLO Private Special Asset Investment Trust II [member] Member pkx:HyundaiInvestGuggenheimCLOPrivateSpecialAssetInvestmentTrustIIMember
963 PoscoPlutus Bio Fund [member] Member pkx:PoscoPlutusBioFundMember
964 PoscoPlutus Project Fund [member] Member pkx:PoscoPlutusProjectFundMember
965 Posco Agri-Food Export Fund [member] Member pkx:PoscoAgriFoodExportFundMember
966 PoscoPlutus Project Second Project Fund [member] Member pkx:PoscoplutusProjectSecondProjectFundMember
967 Posco Culture Contents Fund [member] Member pkx:PoscoCultureContentsFundMember
968 PCC Centroid New 1st Fund [member] Member pkx:PCCCentroidNew1stFundMember
969 PCC Amberstone Private Equity Fund I [member] Member pkx:PCCAmberstonePrivateEquityFundIMember
970 UITrans LRT Co., Ltd. [member] Member pkx:UITransLRTCoLtdMember
971 POSCO Advanced Technical Staff Fund [member] Member pkx:POSCOAdvancedTechnicalStaffFundMember
972 POSCO 4th Industrial Revolution Fund [member] Member pkx:Posco4thIndustrialRevolutionFundMember
973 Clean Gimpo Co., Ltd. [member] Member pkx:CleanGimpoCoLtdMember
974 Incheon-Gimpo Expressway Co., Ltd. [member] Member pkx:IncheonGimpoExpresswayCoLtdMember
975 Pureun Tongyeong Enviro Co., Ltd. [member] Member pkx:PureunTongyeongEnviroCoLtdMember
976 Pure Gimpo Co., Ltd. [member] Member pkx:PureGimpoCoLtdMember
977 POSCO PLANTEC Co., Ltd. [member] Member pkx:POSCOPLANTECCoLtdMember
978 Postech Early Stage Fund [member] Member pkx:PostechEarlyStageFundMember
979 Posgreen Co., Ltd. [member] Member pkx:PosgreenCoLtdMember
980 Clean Iksan Co., Ltd. [member] Member pkx:CleanIksanCoLtdMember
981 Innovalley Co., Ltd. [member] Member pkx:InnovalleyCoLtdMember
982 Applied Science Corp. [member] Member pkx:AppliedScienceCorpMember
983 Pohang Techno Valley PFV Corporation [member] Member pkx:PohangTechnoValleyPFVCorporationMember
984 Blue Ocean private equity fund [member] Member pkx:BLUEOCEANPrivateEquityFundMember
985 Western Inland Highway Co Ltd [member] Member pkx:WesternInlandHighwayCoLtdMember
986 Metropolitan Outer Ring Expressway Co Ltd [member] Member pkx:MetropolitanOuterRingExpresswayCoLtdMember
987 IT Engineering CO. Ltd [member] Member pkx:ITEngineeringCOLtdMember
988 PCC Bio 1ST Fund [member] Member pkx:PCCBioFirstFundMember
989 INNOPOLIS Job Creation Fund II [member] Member pkx:INNOPOLISJobCreationFundIIMember
990 Pospower Co Ltd [member] Member pkx:POSPOWERCoLtdMember
991 INKOTECH INC [Member] Member pkx:InkotechIncMember
992 PCC Social Enterprise Fund II [member] Member pkx:PccSocialEnterpriseFundSecondMember
993 PCC Amberstone Private Equity Fund II [member] Member pkx:PCCAmberstonePrivateEquityFundIIMember
994 Synapse Fund [member] Member pkx:SynapseFundMember
995 NEXTRAIN Co Ltd [member] Member pkx:NextrainCoLtdMember
996 TK CHEMICAL CORPORATION [member] Member pkx:TkChemicalCorporationMember
997 Hanil-Daewoo Cement Co., Ltd. [member] Member pkx:HanilDaewooCementCoLtdMember
998 Pohang Techno Valley AMC [member] Member pkx:PohangTechnoValleyAMCMember
999 VSC POSCO Steel Corporation [member] Member pkx:VSCPOSCOSteelCorporationMember
1000 POSCHROME (PROPRIETARY) LIMITED [member] Member pkx:POSCHROMEPROPRIETARYLIMITEDMember
1001 CAML RESOURCES PTY LTD. [member] Member pkx:CAMLRESOURCESPTYLTDMember
1002 Nickel mining company SAS [member] Member pkx:NickelMiningCompanySASMember
1003 PT. wampu electric power [member] Member pkx:PTWampuElectricPowerMember
1004 POSK(Pinghu) Steel Processing Center Co., Ltd. [member] Member pkx:POSKPinghuSteelProcessingCenterCoLtdMember
1005 PT.INDONESIA POS CHEMTECH CHOSUN Ref [member] Member pkx:PTINDONESIAPOSCHEMTECHCHOSUNRefMember
1006 NS-Thainox Auto Co., Ltd. [member] Member pkx:NSThainoxAutoCoLtdMember
1007 Zhongyue POSCO (Qinhuangdao) Tinplate Industrial Co., Ltd [member] Member pkx:ZhongyuePOSCOQinhuangdaoTinplateIndustrialCoLtdMember
1008 PT. Tanggamus Electric Power [member] Member pkx:PTTanggamusElectricPowerMember
1009 LLP POSUK Titanium [member] Member pkx:LLPPOSUKTitaniumMember
1010 LI3 ENERGY INC [member] Member pkx:LI3ENERGYINCMember
1011 IMFA ALLOYS FINLEASE LTD. [member] Member pkx:IMFAALLOYSFINLEASELTDMember
1012 KRAKATAU POS-CHEM DONG-SUH CHEMICAL [member] Member pkx:KRAKATAUPOSCHEMDONGSUHCHEMICALMember
1013 7623704 Canada Inc. [member] Member pkx:SevenSixTwoThreeSevenZeroFourCanadaIncMember
1014 Hamparan Mulya [member] Member pkx:HamparanMulyaMember
1015 POS-SEAH STEEL WIRE (TIANJIN) CO., Ltd [member] Member pkx:POSSEAHSTEELWIRETIANJINCOLtdMember
1016 Eureka Moly LLC [member] Member pkx:EurekaMolyLLCMember
1017 PT. batutua tembaga raya [member] Member pkx:PTBatutuaTembagaRayaMember
1018 KIRIN VIETNAM CO., LTD [member] Member pkx:KIRINVIETNAMCOLTDMember
1019 POSCO SeAH Steel Wire(Nantong) Co., Ltd. [member] Member pkx:POSCOSeAHSteelWireNantongCoLtdMember
1020 POS-SeAH Steel Wire (Thailand) Co., Ltd. [member] Member pkx:POSSeAHSteelWireThailandCoLtdMember
1021 Jupiter Mines Limited [member] Member pkx:JupiterMinesLimitedMember
1022 SAMHWAN VINA CO., LTD [member] Member pkx:SamhwanVinaCoLtdMember
1023 JB CLARK HILLS [member] Member pkx:JbClarkHillsMember
1024 Saudi-Korean Company for Maintenance Properties Management LLC [member] Member pkx:SaudikoreanCompanyForMaintenancePropertiesManagementLlcMember
1025 Sebang Steel [member] Member pkx:SebangSteelMember
1026 NCR LLC [member] Member pkx:NCRLLCMember
1027 AMCI (WA) PTY LTD [member] Member pkx:AMCIWAPTYLTDMember
1028 SHANGHAI LANSHENG DAEWOO CORP. [member] Member pkx:SHANGHAILANSHENGDAEWOOCORPMember
1029 SHANGHAI WAIGAOQIAO FREE TRADE ZONE LANSHENG DAEWOO IN'L TRADING CO., LTD. [member] Member pkx:SHANGHAIWAIGAOQIAOFREETRADEZONELANSHENGDAEWOOINTRADINGCOLTDMember
1030 General Medicines Company Ltd. [member] Member pkx:GeneralMedicinesCompanyLtdMember
1031 Korea LNG Ltd. [member] Member pkx:KOREALNGLTDMember
1032 AES-VCM Mong Duong Power Company Limited [member] Member pkx:AESVCMMongDuongPowerCompanyLimitedMember
1033 KG Power(M) SDN. BHD [member] Member pkx:KGPowerMSDNBHDMember
1034 South-East Asia Gas Pipeline Company Ltd. [member] Member pkx:SouthEastAsiaGasPipelineCompanyLtdMember
1035 GLOBAL KOMSCO Daewoo LLC [member] Member pkx:GLOBALKOMSCODaewooLLCMember
1036 POSCO-Poggenamp Electrical Steel Pvt. Ltd. [member] Member pkx:POSCOPoggenampElectricalSteelPvtLtdMember
1037 Qingdao Pohang DGENX Stainless Steel Pipe Co Ltd [member] Member pkx:QingdaoPohangDgenxStainlessSteelPipeCoLtdMember
1038 SHINPOONG DAEWOO PHARMA VIETNAM CO.,LTD [member] Member pkx:ShinpoongDaewooPharmaVietnamCoLtdMember
1039 ERAE Automotive Systems Mexico, S. DE R.L. DE C.V [member] Member pkx:EraeAutomotiveSystemsMexicoSderldecvMember
1040 Disclosure of associates [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
1041 Category of business Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities
1042 Ownership (%) Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
1043 Region Concept (Text/String) For Period ifrs-full:PrincipalPlaceOfBusinessOfAssociate
1044 1092 - Disclosure - General Information - Details of Joint Ventures (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureGeneralInformationDetailsOfJointVentures
1045 Disclosure of joint ventures [table] Table

*

*

ifrs-full:DisclosureOfJointVenturesTable
1046 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1047 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1048 Domestic [member] Member ifrs-full:CountryOfDomicileMember
1049 Foreign [member] Member ifrs-full:ForeignCountriesMember
1050 Joint ventures [axis] Axis ifrs-full:JointVenturesAxis
1051 Entity's total for joint ventures [member] Member ifrs-full:EntitysTotalForJointVenturesMember
1052 POSCO MITSUBISHI CARBON TECHNOLOGY [member] Member pkx:POSCOMITSUBISHICARBONTECHNOLOGYMember
1053 POSCO-SGI Falcon Pharma Biological Secondary Fund [member] Member pkx:POSCO-SGIFalconPharmaBiologicalSecondaryFundMember
1054 POSCO-KB Shipbuilding Restructuring Fund [member] Member pkx:POSCO-KBShipbuildingRestructuringFundMember
1055 POSCO-NSC Venture Fund [member] Member pkx:POSCONSCVentureFundMember
1056 Posto Plutus Project 3rd Project Fund [member] Member pkx:PostoPlutusProjectThirdProjectFundMember
1057 PCC Bio 2nd Fund [member] Member pkx:PccBioSecondFundMember
1058 PCC Material 3rd Fund [member] Member pkx:PccMaterialThirdFundMember
1059 PCC L&K IST FUND [member] Member pkx:PccLkFirstFundMember
1060 KOBRASCO [member] Member pkx:KOBRASCOMember
1061 USS-POSCO Industries [member] Member pkx:USSPOSCOIndustriesMember
1062 PT. POSMI Steel Indonesia [member] Member pkx:PTPOSMISteelIndonesiaMember
1063 United Spiral Pipe, LLC [member] Member pkx:UnitedSpiralPipeLLCMember
1064 CSP - Compania Siderurgica do Pecem [member] Member pkx:CSPCompaniaSiderurgicadoPecemMember
1065 BX STEEL POSCO Cold Rolled Sheet Co., Ltd. [member] Member pkx:BXSTEELPOSCOColdRolledSheetCoLtdMember
1066 POSCO-SAMSUNG-Slovakia Processing Center [member] Member pkx:POSCOSAMSUNGSlovakiaProcessingCenterMember
1067 VNS-DAEWOO Co., Ltd. [member] Member pkx:VNSDAEWOOCoLtdMember
1068 YULCHON MEXICO S.A. DE C.V. [member] Member pkx:YULCHONMEXICOSADECVMember
1069 Hyunson Engineering & Construction HYENCO [member] Member pkx:HyunsonEngineeringAndConstructionHYENCOMember
1070 POSCO E&C Saudi Arabia [member] Member pkx:POSCOEAndCSaudiArabiaMember
1071 POSCO(Suzhou) Automotive Processing Center Co., Ltd. [member] Member pkx:POSCOSuzhouAutomotiveProcessingCenterCoLtdMember
1072 POS INFRA AUTO [member] Member pkx:POSINFRAAUTOMember
1073 POSCO(Yantai)Automotive Processing Center Co., Ltd. [member] Member pkx:POSCOYantaiAutomotiveProcessingCenterCoLtdMember
1074 POS-AUSTEM WUHAN AUTOMOTIVE CO.,LTD [member] Member pkx:POSAUSTEMWUHANAUTOMOTIVECOLTDMember
1075 Kwanika Copper Corporation [member] Member pkx:KwanikaCopperCorporationMember
1076 DMSA/AMSA [member] Member pkx:DMSAAMSAMember
1077 Roy Hill Holdings Pty Ltd. [member] Member pkx:RoyHillHoldingsPtyLtdMember
1078 POSCO-NPS Niobium LLC [member] Member pkx:POSCONPSNiobiumLLCMember
1079 Korea Siberia Wood CJSC [member] Member pkx:KoreaSiberiaWoodCJSCMember
1080 Disclosure of joint ventures [line items] LineItems ifrs-full:DisclosureOfJointVenturesLineItems
1081 Category of business Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities
1082 Ownership (%) Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInJointVenture
1083 Region Concept (Text/String) For Period ifrs-full:PrincipalPlaceOfBusinessOfJointVenture
1084 1093 - Disclosure - General Information - Consolidated Subsidiaries Acquired or Newly Established (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureGeneralInformationConsolidatedSubsidiariesAcquiredOrNewlyEstablished
1085 Disclosure of subsidiaries [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
1086 Joint ventures [axis] Axis ifrs-full:JointVenturesAxis
1087 Entity's total for joint ventures [member] Member ifrs-full:EntitysTotalForJointVenturesMember
1088 POS-LT PTY LTD [member] Member pkx:POSLTPtyLtdMember
1089 POSCO SINGAPORE LNG TRADING PTE. LTD [member] Member pkx:POSCOSINGAPORELNGTRADINGPTELTDMember
1090 ZHEJIANG POSCO-HUAYOU ESM CO.,LTD [member] Member pkx:ZhejiangPoscoHuayouEsmCoLtdMember
1091 POSCO Argentina S.A.U. [member] Member pkx:PoscoArgentinaSauMember
1092 Songdo Development PMC (Project Management Company) LLC. [member] Member pkx:SongdoDevelopmentProjectManagementCompanyLLCMember
1093 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
1094 Date of addition Concept (Year/Month) For Period pkx:DateOfAdditionToConsolidationSubsidiary
1095 Ownership (%) Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
1096 Reason Concept (Text/String) For Period pkx:DescriptionOfReasonForAdditionToConsolidationSubsidiary
1097 1094 - Disclosure - General Information - Subsidiaries That Were Excluded From Consolidation (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureGeneralInformationSubsidiariesThatWereExcludedFromConsolidation
1098 Disclosure of subsidiaries [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
1099 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1100 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1101 KIS Devonian Canada Corporation [member] Member pkx:KisDevonianCanadaCorporationMember
1102 POSCO-CDSFC [member] Member pkx:POSCOCDSFCMember
1103 POCA STEM Co., Ltd [member] Member pkx:POCASTEMCoLtdMember
1104 POSCO E&C VENEZUELA C.A. [member] Member pkx:POSCOEAndCVENEZUELACAMember
1105 PT PEN INDONESIA [member] Member pkx:PTPENINDONESIAMember
1106 Kyobo Securities Bond Plus 6M Professional Private Equity Trust W-2 [member] Member pkx:KyoboSecuritiesBondPlusSixMProfessionalPrivateEquityTrustWTwoMember
1107 Mirae Asset Smart Q Sigma 2.0 Professional Private Equity Trust [member] Member pkx:MiraeAssetSmartSigmaTwoPointZeroProfessionalPrivateEquityTrustMember
1108 Kyobo Securities Bond Plus 6M Professional Private Equity Trust W-5 [member] Member pkx:KyoboSecuritiesBondPlus6mProfessionalPrivateEquityTrustWFiveMember
1109 POSCO RUS LLC [member] Member pkx:POSCORUSLLCMember
1110 Pospower Co Ltd [member] Member pkx:POSPOWERCoLtdMember
1111 POSCO MESDC S.A. DE C.V. [member] Member pkx:POSCOMESDCSADECVMember
1112 POSCO Engineering and Construction - UZ [member] Member pkx:POSCOEngineeringAndConstructionUZMember
1113 Disclosure of subsidiaries [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
1114 Date of exclusion Concept (Year/Month) For Period pkx:DateOfExclusionFromConsolidationSubsidiary
1115 Reason Concept (Text/String) For Period pkx:DescriptionOfReasonForExclusionFromConsolidationSubsidiary
1116 1095 - Disclosure - Statement of Compliance - Summary of Impact on Net of Tax on Transition to New Update on Retained Earnings and Non-controlling Interests (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureStatementOfComplianceSummaryOfImpactOnNetOfTaxOnTransitionToNewUpdateOnRetainedEarningsAndNoncontrollingInterests
1117 Disclosure of initial application of standards or interpretations [table] Table

*

*

ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsTable
1118 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
1119 Equity [member] Member ifrs-full:EquityMember
1120 Retained earnings [member] Member ifrs-full:RetainedEarningsMember
1121 Non-controlling interests [member] Member ifrs-full:NoncontrollingInterestsMember
1122 Disclosure of initial application of standards or interpretations [line items] LineItems ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsLineItems
1123 Shipping services included in the sales contract Concept (Monetary) For Period Debit pkx:ImpactOnShippingServicesIncludedInSalesContract
1124 Separate construction contract determined to be a single performance obligation Concept (Monetary) For Period Credit pkx:ImpactOnSeparateConstructionContractDeterminedToBeSinglePerformanceObligation
1125 Variable consideration for sales discounts and price adjustments based on performance Concept (Monetary) For Period Debit pkx:ImpactOnVariableConsiderationForSalesDiscountsAndPriceAdjustmentsBasedOnPerformance
1126 Change in revenue recognition method for contracts without enforceable right to payment Concept (Monetary) For Period Debit pkx:ImpactOnRevenueRecognitionMethodForContractsWithoutEnforceableRightToPayment
1127 Change in percentage of completion due to excessive use of materials Concept (Monetary) For Period Debit pkx:ImpactOnPercentageOfCompletionDueToExcessiveUseOfMaterials
1128 Recognize prepaid contract cost as an expense Concept (Monetary) For Period Debit pkx:ImpactOnPrepaidContractCostAsAnExpense
1129 Total Concept (Monetary) For Period Debit pkx:NetImpactDueTotransitionOfIfrs15
1130 1096 - Disclosure - Statement of Compliance - Summary of Effects of Adoption of IFRS No. 15 to Company's Consolidated Statements of Financial Position and Consolidated Statements of Comprehensive Income (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureStatementOfComplianceSummaryOfEffectsOfAdoptionOfIFRSNo15ToCompanysConsolidatedStatementsOfFinancialPositionAndConsolidatedStatementsOfComprehensiveIncome
1131 Disclosure of expected impact of initial application of new standards or interpretations [table] Table

*

*

ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable
1132 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
1133 Currently stated [member] Member ifrs-full:RestatedMember
1134 Restated balance [member] Member pkx:RestatedBalanceMember
1135 Increase (decrease) due to changes in accounting policy required by IFRS15 [member] Member pkx:IncreaseDecreaseDueToChangesInAccountingPolicyRequiredByIFRS15Member
1136 Previously stated [member] Member ifrs-full:PreviouslyStatedMember
1137 Disclosure of expected impact of initial application of new standards or interpretations [line items] LineItems ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems
1138 Consolidated financial statements of financial position Abstract ifrs-full:StatementOfFinancialPositionAbstract
1139 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
1140 Trade accounts and notes receivable Concept (Monetary) As Of Debit pkx:CurrentTradeAndNotesReceivables
1141 Inventories Concept (Monetary) As Of Debit ifrs-full:Inventories
1142 Other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentNonfinancialAssets
1143 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
1144 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:NetDeferredTaxAssets
1145 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
1146 Others payables Concept (Monetary) As Of Credit ifrs-full:OtherCurrentPayables
1147 Current income tax liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentTaxLiabilitiesCurrent
1148 Provisions Concept (Monetary) As Of Credit ifrs-full:OtherShorttermProvisions
1149 Other current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentNonfinancialLiabilities
1150 Retained earnings Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
1151 Non-controllinginterests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
1152 Consolidated statements of comprehensive income Abstract ifrs-full:StatementOfComprehensiveIncomeAbstract
1153 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
1154 Cost of sales Concept (Monetary) For Period Debit ifrs-full:CostOfSales
1155 Selling and administrative expenses Concept (Monetary) For Period Debit ifrs-full:SellingGeneralAndAdministrativeExpense
1156 Finance costs Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
1157 Profit before income taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
1158 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
1159 Profit Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
1160 1097 - Disclosure - Statement of Compliance - Summary of Impact, Net of Tax, of Transition to IFRS No. 9 on Reserves, Retained Earnings and Non-Controlling Interests (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureStatementOfComplianceSummaryOfImpactNetOfTaxOfTransitionToIFRSNo9OnReservesRetainedEarningsAndNonControllingInterests
1161 Disclosure of expected impact of initial application of new standards or interpretations [table] Table

*

*

ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable
1162 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
1163 Currently stated [member] Member ifrs-full:RestatedMember
1164 Increase (decrease) due to changes in accounting policy required by IFRS 9 [member] Member pkx:IncreaseDecreaseDueToChangesInAccountingPolicyRequiredByIFRS9Member
1165 Type of measurement of expected credit losses [axis] Axis ifrs-full:TypeOfMeasurementOfExpectedCreditLossesAxis
1166 Type of measurement of expected credit losses [member] Member ifrs-full:TypeOfMeasurementOfExpectedCreditLossesMember
1167 Expected credit losses [member] Member pkx:ExpectedCreditLossesMember
1168 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
1169 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
1170 Classification to fair value through profit or loss in securities and select to fair value through other comprehensive income in equity securities [member] Member pkx:ClassificationToFairValueThroughProfitOrLossInSecuritiesAndSelectToFairValueThroughOtherComprehensiveIncomeInEquitySecuritiesMember
1171 Disclosure of expected impact of initial application of new standards or interpretations [line items] LineItems ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems
1172 Reserves Concept (Monetary) As Of Credit ifrs-full:OtherReserves
1173 Retained earnings Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
1174 Noncontrolling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
1175 1098 - Disclosure - Statement of Compliance - Summary of Impact, Net of Tax, of Transition to IFRS No. 9 on Reserves, Retained Earnings and Non-Controlling Interests (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureStatementOfComplianceSummaryOfImpactNetOfTaxOfTransitionToIFRSNo9OnReservesRetainedEarningsAndNonControllingInterestsParenthetical
1176 Disclosure of expected impact of initial application of new standards or interpretations [table] Table

*

*

ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsTable
1177 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
1178 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
1179 Fair value through other comprehensive income [Member] Member ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember
1180 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
1181 Currently stated [member] Member ifrs-full:RestatedMember
1182 Increase (decrease) due to changes in accounting policy required by IFRS 9 [member] Member pkx:IncreaseDecreaseDueToChangesInAccountingPolicyRequiredByIFRS9Member
1183 Disclosure of expected impact of initial application of new standards or interpretations [line items] LineItems ifrs-full:DescriptionOfExpectedImpactOfInitialApplicationOfNewStandardsOrInterpretationsLineItems
1184 Reserves Concept (Monetary) As Of Credit ifrs-full:OtherReserves
1185 Retained earnings Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
1186 1099 - Disclosure - Statement of Compliance - Summary of Initial Application, Measurement Categories and Carrying Amounts of Financial Assets in Accordance with IAS No. 39 and IFRS No. 9 (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureStatementOfComplianceSummaryOfInitialApplicationMeasurementCategoriesAndCarryingAmountsOfFinancialAssetsInAccordanceWithIASNo39AndIFRSNo9
1187 Disclosure of detailed information about financial instruments [table] Table

*

*

ifrs-full:DisclosureOfFinancialInstrumentsTable
1188 Effect of overlay approach reclassification [axis] Axis ifrs-full:EffectOfOverlayApproachReclassificationAxis
1189 In accordance with IFRS 9 [member] Member ifrs-full:InAccordanceWithIFRS9Member
1190 IFRS9 [member] Member pkx:IFRS9Member
1191 IAS 39 [member] Member pkx:IAS39Member
1192 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
1193 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
1194 Financial assets at fair value through profit or loss [member] Member ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
1195 Hedging instrument category [member] Member pkx:HedgingInstrumentCategoryMember
1196 Amortized cost [Member] Member ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember
1197 Fair value through other comprehensive income [Member] Member ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember
1198 Loans and receivables [member] Member ifrs-full:LoansAndReceivablesCategoryMember
1199 Available-for-sale financial assets [member] Member ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
1200 Held-to-maturity financial assets [member] Member ifrs-full:HeldtomaturityInvestmentsCategoryMember
1201 Disclosure of detailed information about financial instruments [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
1202 Derivative assets Concept (Monetary) As Of Debit ifrs-full:DerivativeFinancialAssets
1203 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
1204 Trade accounts and notes receivable Concept (Monetary) As Of Debit pkx:CurrentTradeAndNotesReceivables
1205 Other receivables Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
1206 Equity securities Concept (Monetary) As Of Credit pkx:EquitySecurities
1207 Debt securities Concept (Monetary) As Of Credit ifrs-full:DebtSecurities
1208 Other Securities Concept (Monetary) As Of Debit pkx:OtherSecurities
1209 Deposit instruments Concept (Monetary) As Of Debit pkx:DepositInstruments
1210 Short-term financial instruments Concept (Monetary) As Of Debit pkx:ShorttermFinancialInstruments
1211 1100 - Disclosure - Statement of Compliance - Summary of Initial Application, Measurement Categories and Carrying Amounts of Financial Assets in Accordance with IAS No. 39 and IFRS No. 9 (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureStatementOfComplianceSummaryOfInitialApplicationMeasurementCategoriesAndCarryingAmountsOfFinancialAssetsInAccordanceWithIASNo39AndIFRSNo9Parenthetical
1212 Disclosure of detailed information about financial instruments [table] Table

*

*

ifrs-full:DisclosureOfFinancialInstrumentsTable
1213 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
1214 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
1215 Financial assets at fair value through profit or loss [member] Member ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
1216 Loans and receivables [member] Member ifrs-full:LoansAndReceivablesCategoryMember
1217 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
1218 Currently stated [member] Member ifrs-full:RestatedMember
1219 Increase (decrease) due to changes in accounting policy required by IFRS 9 [member] Member pkx:IncreaseDecreaseDueToChangesInAccountingPolicyRequiredByIFRS9Member
1220 Disclosure of detailed information about financial instruments [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
1221 Loss allowance Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1222 Reserves Concept (Monetary) As Of Credit ifrs-full:OtherReserves
1223 Retained earnings Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
1224 Non-controlling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
1225 1101 - Disclosure - Statement of Compliance - Additional Information (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureStatementOfComplianceAdditionalInformation
1226 Disclosure of initial application of standards or interpretations [table] Table

*

*

ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsTable
1227 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
1228 Currently stated [member] Member ifrs-full:RestatedMember
1229 Increase (decrease) due to changes in accounting policy required by IFRS 9 [member] Member pkx:IncreaseDecreaseDueToChangesInAccountingPolicyRequiredByIFRS9Member
1230 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
1231 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
1232 Loans and receivables [member] Member ifrs-full:LoansAndReceivablesCategoryMember
1233 Disclosure of initial application of standards or interpretations [line items] LineItems ifrs-full:DisclosureOfInitialApplicationOfStandardsOrInterpretationsLineItems
1234 Loss allowance Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
1235 Retained earnings Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
1236 Non-controlling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
1237 1102 - Disclosure - Summary of Significant Accounting Policies - Estimated Useful Lives of Property, Plant and Equipment (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLivesOfPropertyPlantAndEquipment
1238 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1239 Range [axis] Axis ifrs-full:RangeAxis
1240 Ranges [member] Member ifrs-full:RangesMember
1241 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
1242 Top of range [member] Member ifrs-full:TopOfRangeMember
1243 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1244 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
1245 Buildings [member] Member ifrs-full:BuildingsMember
1246 Structures [member] Member pkx:StructuresMember
1247 Machinery and equipment [member] Member ifrs-full:MachineryMember
1248 Vehicles [member] Member ifrs-full:VehiclesMember
1249 Tools [member] Member pkx:ToolsMember
1250 Furniture and fixtures [member] Member ifrs-full:FixturesAndFittingsMember
1251 Finance lease assets [member] Member pkx:PropertyPlantAndEquipmentUnderFinanceLeasesMember
1252 Bearer plants [member] Member ifrs-full:BearerPlantsMember
1253 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1254 Estimated useful lives Concept (Text/String) For Period ifrs-full:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipment
1255 1103 - Disclosure - Summary of Significant Accounting Policies - Estimated Useful Lives of Intangible Assets (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLivesOfIntangibleAssets
1256 Disclosure of detailed information about intangible assets [table] Table

*

*

ifrs-full:DisclosureOfIntangibleAssetsTable
1257 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
1258 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
1259 Intellectual property rights [member] Member ifrs-full:CopyrightsPatentsAndOtherIndustrialPropertyRightsServiceAndOperatingRightsMember
1260 Development costs [member] Member ifrs-full:CapitalisedDevelopmentExpenditureMember
1261 Port facilities usage rights [member] Member pkx:PortFacilitiesUsageRightsMember
1262 Other intangible assets [member] Member ifrs-full:OtherIntangibleAssetsMember
1263 Range [axis] Axis ifrs-full:RangeAxis
1264 Ranges [member] Member ifrs-full:RangesMember
1265 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
1266 Top of range [member] Member ifrs-full:TopOfRangeMember
1267 Disclosure of detailed information about intangible assets [line items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
1268 Estimated useful lives of intangible assets Concept (Text/String) For Period ifrs-full:UsefulLivesOrAmortisationRatesIntangibleAssetsOtherThanGoodwill
1269 1104 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformation
1270 Disclosure of summary of significant accounting policies [Table] Table

*

*

pkx:DisclosureOfSummaryOfSignificantAccountingPoliciesTable
1271 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
1272 Currently stated [member] Member ifrs-full:RestatedMember
1273 Increase (decrease) due to application of IFRS 15 [member] Member ifrs-full:IncreaseDecreaseDueToApplicationOfIFRS15Member
1274 Disclosure of summary of significant accounting policies [Line Items] LineItems pkx:DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems
1275 Invoice payable description Concept (Text/String) For Period pkx:InvoicePayableDescription
1276 Construction contract payment description Concept (Text/String) For Period pkx:ConstructionContractPaymentDescription
1277 1105 - Disclosure - Financial Risk Management - Net Borrowing-to-Equity Ratio (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialRiskManagementNetBorrowingtoEquityRatio
1278 Implied Table Table

*

*

implied:Table
1279 Disclosure of nature and extent of risks arising from financial instruments [abstract] Abstract ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsAbstract
1280 Total borrowings Concept (Monetary) As Of Credit ifrs-full:Borrowings
1281 Less: Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
1282 Net borrowings Concept (Monetary) As Of Credit pkx:BorrowingsNetOfCashAndCashEquivalents
1283 Total equity Concept (Monetary) As Of Credit ifrs-full:Equity
1284 Net borrowings-to-equity ratio Concept (Percent) As Of pkx:NetBorrowingsToEquityRatio
1285 1106 - Disclosure - Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureCashAndCashEquivalentsSummaryOfCashAndCashEquivalents
1286 Implied Table Table

*

*

implied:Table
1287 Cash and cash equivalents [abstract] Abstract ifrs-full:CashAndCashEquivalentsAbstract
1288 Cash Concept (Monetary) As Of Debit ifrs-full:Cash
1289 Demand deposits and checking accounts Concept (Monetary) As Of Debit ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents
1290 Time deposits Concept (Monetary) As Of Debit ifrs-full:BankingArrangementsClassifiedAsCashEquivalents
1291 Other cash equivalents Concept (Monetary) As Of Debit ifrs-full:OtherCashAndCashEquivalents
1292 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
1293 1107 - Disclosure - Cash and Cash Equivalents - Summary of Cash and Cash Equivalents - Additional Information (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureCashAndCashEquivalentsSummaryOfCashAndCashEquivalentsAdditionalInformation
1294 Disclosure Of Cash And Cash Equivalents [table] Table

*

*

pkx:DisclosureOfCashAndCashEquivalentsTable
1295 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1296 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1297 POSCO ENGINEERING & CONSTRUCTION CO., LTD. [member] Member pkx:POSCOENGINEERINGAndCONSTRUCTIONCOLTDMember
1298 Disclosure of Cash and Cash Equivalents [Line Items] LineItems pkx:DisclosureOfCashAndCashEquivalentsLineItems
1299 Cash equivalents, restricted Concept (Monetary) As Of Debit ifrs-full:CurrentRestrictedCashAndCashEquivalents
1300 1108 - Disclosure - Trade Accounts and Notes Receivable - Summary of Trade Accounts and Notes Receivables (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureTradeAccountsAndNotesReceivableSummaryOfTradeAccountsAndNotesReceivables
1301 Disclosure of financial assets [table] Table

*

*

ifrs-full:DisclosureOfFinancialAssetsTable
1302 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1303 Book value [Member] Member ifrs-full:CarryingAmountMember
1304 Gross amount [member] Member ifrs-full:GrossCarryingAmountMember
1305 Allowance for credit losses [member] Member ifrs-full:AllowanceForCreditLossesMember
1306 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1307 Current Abstract ifrs-full:TradeAndOtherCurrentReceivablesAbstract
1308 Trade accounts and notes receivable Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
1309 Finance lease receivables Concept (Monetary) As Of Debit ifrs-full:CurrentFinanceLeaseReceivables
1310 Unbilled due from customers for contract work Concept (Monetary) As Of Debit ifrs-full:CurrentReceivablesFromContractsWithCustomers
1311 Current trade accounts and notes receivable Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
1312 Non-current Abstract ifrs-full:NoncurrentReceivablesAbstract
1313 Trade accounts and notes receivable Concept (Monetary) As Of Debit ifrs-full:NoncurrentTradeReceivables
1314 Finance lease receivables Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinanceLeaseReceivables
1315 Non-current trade accounts and notes receivable Concept (Monetary) As Of Debit pkx:NoncurrentTradeAndNotesReceivables
1316 1109 - Disclosure - Trade Accounts and Notes Receivable - Additional Information (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureTradeAccountsAndNotesReceivableAdditionalInformation
1317 Disclosure of financial assets [table] Table

*

*

ifrs-full:DisclosureOfFinancialAssetsTable
1318 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1319 Financial assets [Member] Member ifrs-full:FinancialAssetsMember
1320 Trade accounts and notes receivables, net [member] Member pkx:TradeAccountsAndNotesReceivablesMember
1321 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1322 Trade accounts and notes receivable sold to financial institutions, for which the derecognition conditions were not met Concept (Monetary) As Of Debit ifrs-full:FairValueOfTransferredFinancialAssetsThatAreNotDerecognisedInTheirEntirety
1323 1110 - Disclosure - Trade Accounts and Notes Receivable - Finance Lease Receivables (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureTradeAccountsAndNotesReceivableFinanceLeaseReceivables
1324 Disclosure of finance lease and operating lease by lessor [table] Table

*

*

ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLessorTable
1325 Major customers [axis] Axis ifrs-full:MajorCustomersAxis
1326 Customers [member] Member ifrs-full:MajorCustomersMember
1327 Rental contractor [member] Member pkx:RentalContractorMember
1328 Korea electric power corporation [member] Member pkx:KoreaElectricPowerCorporationMember
1329 Hystech.Co. Ltd. [member] Member pkx:HystechCoLtdMember
1330 Disclosure of finance lease and operating lease by lessor [line items] LineItems ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLessorLineItems
1331 Finance lease receivables Concept (Monetary) As Of Debit ifrs-full:MinimumFinanceLeasePaymentsReceivableAtPresentValue
1332 1111 - Disclosure - Trade Accounts and Notes Receivable - Gross Amount and Present Value of Minimum Lease Payments (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureTradeAccountsAndNotesReceivableGrossAmountAndPresentValueOfMinimumLeasePayments
1333 Disclosure of finance lease and operating lease by lessor [table] Table

*

*

ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLessorTable
1334 Maturity [axis] Axis ifrs-full:MaturityAxis
1335 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1336 Less than 1 year [member] Member ifrs-full:NotLaterThanOneYearMember
1337 1 year - 5 years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1338 Disclosure of finance lease and operating lease by lessor [line items] LineItems ifrs-full:DisclosureOfFinanceLeaseAndOperatingLeaseByLessorLineItems
1339 Gross amount of lease payment Concept (Monetary) As Of Debit ifrs-full:GrossInvestmentInFinanceLease
1340 Unrealized interest income Concept (Monetary) As Of Debit ifrs-full:UnearnedFinanceIncomeOnFinanceLease
1341 Present value of minimum lease payment Concept (Monetary) As Of Debit ifrs-full:MinimumFinanceLeasePaymentsReceivableAtPresentValue
1342 1112 - Disclosure - Other Receivables - Summary of Other Receivables (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureOtherReceivablesSummaryOfOtherReceivables
1343 Disclosure of financial assets [table] Table

*

*

ifrs-full:DisclosureOfFinancialAssetsTable
1344 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1345 Book value [Member] Member ifrs-full:CarryingAmountMember
1346 Gross amount [member] Member ifrs-full:GrossCarryingAmountMember
1347 Allowance for credit losses [member] Member ifrs-full:AllowanceForCreditLossesMember
1348 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1349 Current Abstract ifrs-full:TradeAndOtherCurrentReceivablesAbstract
1350 Loans Concept (Monetary) As Of Debit pkx:ShorttermLoansReceivable
1351 Other accounts receivable Concept (Monetary) As Of Debit pkx:OtherCurrentAccountsReceivable
1352 Accrued income Concept (Monetary) As Of Debit ifrs-full:CurrentAccruedIncome
1353 Deposits Concept (Monetary) As Of Debit ifrs-full:ShorttermDepositsNotClassifiedAsCashEquivalents
1354 Others Concept (Monetary) As Of Debit pkx:MiscellaneousOtherCurrentReceivables
1355 Other current receivables Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
1356 Non-current Abstract ifrs-full:NoncurrentReceivablesAbstract
1357 Loans Concept (Monetary) As Of Debit pkx:LongtermLoansReceivable
1358 Other accounts receivable Concept (Monetary) As Of Debit pkx:OtherNoncurrentAccountsReceivable
1359 Accrued income Concept (Monetary) As Of Debit ifrs-full:NoncurrentAccruedIncome
1360 Deposits Concept (Monetary) As Of Debit ifrs-full:LongtermDeposits
1361 Other non-current receivables Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentReceivables
1362 1113 - Disclosure - Other Financial Assets - Summary of Other Financial Assets (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureOtherFinancialAssetsSummaryOfOtherFinancialAssets
1363 Disclosure of financial assets [table] Table

*

*

ifrs-full:DisclosureOfFinancialAssetsTable
1364 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1365 Financial assets [Member] Member ifrs-full:FinancialAssetsMember
1366 Debt securities [member] Member ifrs-full:DebtSecuritiesMember
1367 Equity investments [member] Member ifrs-full:EquityInvestmentsMember
1368 Others [member] Member pkx:OtherFinancialAssetMember
1369 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1370 Current Abstract ifrs-full:CategoriesOfCurrentFinancialAssetsAbstract
1371 Derivatives assets held for trading Concept (Monetary) As Of Debit ifrs-full:CurrentDerivativeFinancialAssets
1372 Debt securities Concept (Monetary) As Of Credit pkx:DebtSecuritiesCurrent
1373 Financial assets held for trading Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading
1374 Available-for-sale securities Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssetsAvailableforsale
1375 Current portion of held-to-maturity securities Concept (Monetary) As Of Debit ifrs-full:CurrentHeldtomaturityInvestments
1376 Deposit instruments Concept (Monetary) As Of Debit pkx:DepositsCurrent
1377 Short-term financial instruments Concept (Monetary) As Of Debit pkx:ShorttermFinancialInstruments
1378 Other current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentFinancialAssets
1379 Non-current Abstract ifrs-full:CategoriesOfNoncurrentFinancialAssetsAbstract
1380 Derivatives assets held for trading Concept (Monetary) As Of Debit ifrs-full:NoncurrentDerivativeFinancialAssets
1381 Equity securities Concept (Monetary) As Of Credit pkx:EquitySecurities
1382 Debt securities Concept (Monetary) As Of Credit pkx:DebtSecuritiesNonCurrent
1383 Other Securities Concept (Monetary) As Of Debit pkx:OtherSecurities
1384 Available-for-sale securities Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinancialAssetsAvailableforsale
1385 Held-to-maturity securities Concept (Monetary) As Of Debit ifrs-full:NoncurrentHeldtomaturityInvestments
1386 Deposit instruments Concept (Monetary) As Of Debit pkx:DepositsNoncurrentAssets
1387 Other non current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
1388 1114 - Disclosure - Other Financial Assets - Summary of Other Financial Assets (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureOtherFinancialAssetsSummaryOfOtherFinancialAssetsParenthetical
1389 Disclosure of financial assets [table] Table

*

*

ifrs-full:DisclosureOfFinancialAssetsTable
1390 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
1391 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
1392 Available-for-sale financial assets [member] Member ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
1393 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
1394 Counterparties [member] Member ifrs-full:CounterpartiesMember
1395 Government [member] Member ifrs-full:GovernmentMember
1396 Financial arrangements, pledge and others [member] Member pkx:FinancialArrangementsPledgeAndOthersMember
1397 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
1398 Financial instruments restricted for use Concept (Monetary) As Of Debit ifrs-full:AssetsToWhichSignificantRestrictionsApply
1399 Available-for-sale securities, respectively, have been provided as collateral for borrowings, construction projects and others Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsPledgedAsCollateralForLiabilitiesOrContingentLiabilities
1400 1115 - Disclosure - Inventories - Summary of Inventories (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureInventoriesSummaryOfInventories
1401 Disclosure of inventories [Table] Table

*

*

pkx:DisclosureOfInventoriesTable
1402 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1403 Book value [Member] Member ifrs-full:CarryingAmountMember
1404 Gross amount [member] Member ifrs-full:GrossCarryingAmountMember
1405 Allowance for inventories valuation [member] Member pkx:AllowanceForInventoriesValuationMember
1406 Disclosure of inventories [Line Items] LineItems pkx:DisclosureOfInventoriesLineItems
1407 Finished goods Concept (Monetary) As Of Debit ifrs-full:FinishedGoods
1408 Merchandise Concept (Monetary) As Of Debit ifrs-full:Merchandise
1409 Semi-finished goods Concept (Monetary) As Of Debit ifrs-full:WorkInProgress
1410 Raw materials Concept (Monetary) As Of Debit ifrs-full:RawMaterials
1411 Fuel and materials Concept (Monetary) As Of Debit ifrs-full:CurrentFuel
1412 Construction inventories Concept (Monetary) As Of Debit pkx:ConstructionInventories
1413 Materials-in-transit Concept (Monetary) As Of Debit pkx:MaterialsInTransit
1414 Others Concept (Monetary) As Of Debit ifrs-full:OtherInventories
1415 Inventories Concept (Monetary) As Of Debit ifrs-full:Inventories
1416 1116 - Disclosure - Inventories - Changes of Allowance for Inventories Valuation (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureInventoriesChangesOfAllowanceForInventoriesValuation
1417 Implied Table Table

*

*

implied:Table
1418 Classes of current inventories [abstract] Abstract ifrs-full:ClassesOfInventoriesAbstract
1419 Allowance for inventories valuation, beginning balance Concept (Monetary) As Of Credit pkx:AllowanceForInventoriesValuation
1420 Loss on valuation of inventories Concept (Monetary) For Period ifrs-full:InventoryWritedown2011
1421 Realization on disposal of inventories Concept (Monetary) For Period Debit pkx:AllowanceForInventoriesValuationRealizationOnDisposal
1422 Others Concept (Monetary) For Period Credit pkx:OtherAdjustmentsOnAllowanceForInventoriesValuation
1423 Allowance for inventories valuation, ending balance Concept (Monetary) As Of Credit pkx:AllowanceForInventoriesValuation
1424 1117 - Disclosure - Assets Held for Sale - Details of Assets Held For Sale and Related Liabilities (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureAssetsHeldForSaleDetailsOfAssetsHeldForSaleAndRelatedLiabilities
1425 Assets and liabilities held for sale [Table] Table

*

*

pkx:AssetsAndLiabilitiesHeldForSaleTable
1426 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1427 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1428 Posco [member] Member ifrs-full:ParentMember
1429 Subsidiaries [member] Member ifrs-full:SubsidiariesMember
1430 Assets and liabilities classified as held for sale [axis] Axis ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis
1431 Assets and liabilities not classified as held for sale [member] Member ifrs-full:AssetsAndLiabilitiesNotClassifiedAsHeldForSaleMember
1432 Assets held for sale and related liabilities [member] Member ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleMember
1433 Assets and liabilities held for sale [Line Items] LineItems pkx:AssetsAndLiabilitiesHeldForSaleLineItems
1434 Assets Abstract ifrs-full:AssetsAbstract
1435 Other financial assets Concept (Monetary) As Of Debit ifrs-full:OtherFinancialAssets
1436 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1437 Others Concept (Monetary) As Of Debit ifrs-full:OtherAssets
1438 Assets held for sale Concept (Monetary) As Of Debit ifrs-full:CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners
1439 1118 - Disclosure - Assets Held for Sale - Details of Assets Held For Sale and Related Liabilities (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureAssetsHeldForSaleDetailsOfAssetsHeldForSaleAndRelatedLiabilitiesParenthetical
1440 Assets and liabilities held for sale [Table] Table

*

*

pkx:AssetsAndLiabilitiesHeldForSaleTable
1441 Assets and liabilities classified as held for sale [axis] Axis ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleAxis
1442 Assets and liabilities not classified as held for sale [member] Member ifrs-full:AssetsAndLiabilitiesNotClassifiedAsHeldForSaleMember
1443 Assets held for sale and related liabilities [member] Member ifrs-full:AssetsAndLiabilitiesClassifiedAsHeldForSaleMember
1444 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1445 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1446 POSCO ENGINEERING & CONSTRUCTION CO., LTD. [member] Member pkx:POSCOENGINEERINGAndCONSTRUCTIONCOLTDMember
1447 Assets and liabilities held for sale [Line Items] LineItems pkx:AssetsAndLiabilitiesHeldForSaleLineItems
1448 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1449 1119 - Disclosure - Investments in Associates and Joint Ventures - Summary of Investments in Associates and Joint Ventures (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureInvestmentsInAssociatesAndJointVenturesSummaryOfInvestmentsInAssociatesAndJointVentures
1450 Implied Table Table

*

*

implied:Table
1451 Investments in subsidiaries, joint ventures and associates [abstract] Abstract ifrs-full:InvestmentsInSubsidiariesJointVenturesAndAssociatesAbstract
1452 Investments in associates Concept (Monetary) As Of Debit ifrs-full:InvestmentsInAssociates
1453 Investments in joint ventures Concept (Monetary) As Of Debit ifrs-full:InvestmentsInJointVentures
1454 Investments in associates and joint ventures Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
1455 1120 - Disclosure - Investments in Associates and Joint Ventures - Details of Investments in Associates (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureInvestmentsInAssociatesAndJointVenturesDetailsOfInvestmentsInAssociates
1456 Disclosure of associates [table] Table

*

*

ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesTable
1457 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1458 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1459 Domestic [member] Member ifrs-full:CountryOfDomicileMember
1460 Foreign [member] Member ifrs-full:ForeignCountriesMember
1461 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1462 Book value [Member] Member ifrs-full:CarryingAmountMember
1463 Acquisition cost [member] Member pkx:AcquisitionCostMember
1464 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
1465 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1466 EQP POSCO Global No1 Natural Resources Private Equity Fund [member] Member pkx:EQPPOSCOGlobalNO1NaturalResourcesPEFMember
1467 Pospower Co Ltd [member] Member pkx:POSPOWERCoLtdMember
1468 SNNC [member] Member pkx:SNNCMember
1469 QSONE Co.,Ltd. [member] Member pkx:QSONECoLtdMember
1470 Chuncheon Energy Co., Ltd. [member] Member pkx:ChuncheonEnergyCoLtdMember
1471 Chungju Enterprise City Development Co.,Ltd [member] Member pkx:CHUNGJUENTERPRISECITYDEVELOPMENTCoLtdMember
1472 Daesung Steel [member] Member pkx:DaesungSteelMember
1473 Incheon-Gimpo Expressway Co., Ltd. [member] Member pkx:IncheonGimpoExpresswayCoLtdMember
1474 Keystone-HYUNDAI SECURITIES NO. 1. Private Equity Fund [member] Member pkx:KeystoneHYUNDAISECURITIESNO1PrivateEquityFundMember
1475 KoFC POSCO HANWHA KB Shared Growth No. 2. Private Equity Fund [member] Member pkx:KoFCPOSCOHANWHAKBSharedGrowthNO2PrivateEquityFundMember
1476 KONES, Corp. [member] Member pkx:KONESCorpMember
1477 Blue Ocean private equity fund [member] Member pkx:BLUEOCEANPrivateEquityFundMember
1478 UITrans LRT Co., Ltd. [member] Member pkx:UITransLRTCoLtdMember
1479 Other associates [member] Member pkx:OtherAssociatesMember
1480 AES-VCM Mong Duong Power Company Limited [member] Member pkx:AESVCMMongDuongPowerCompanyLimitedMember
1481 South-East Asia Gas Pipeline Company Ltd. [member] Member pkx:SouthEastAsiaGasPipelineCompanyLtdMember
1482 7623704 Canada Inc. [member] Member pkx:SevenSixTwoThreeSevenZeroFourCanadaIncMember
1483 Eureka Moly LLC [member] Member pkx:EurekaMolyLLCMember
1484 AMCI (WA) PTY LTD [member] Member pkx:AMCIWAPTYLTDMember
1485 Korea LNG Ltd. [member] Member pkx:KOREALNGLTDMember
1486 Nickel mining company SAS [member] Member pkx:NickelMiningCompanySASMember
1487 NCR LLC [member] Member pkx:NCRLLCMember
1488 PT. batutua tembaga raya [member] Member pkx:PTBatutuaTembagaRayaMember
1489 Zhongyue POSCO (Qinhuangdao) Tinplate Industrial Co., Ltd [member] Member pkx:ZhongyuePOSCOQinhuangdaoTinplateIndustrialCoLtdMember
1490 PT. wampu electric power [member] Member pkx:PTWampuElectricPowerMember
1491 POSCO SeAH Steel Wire(Nantong) Co., Ltd. [member] Member pkx:POSCOSeAHSteelWireNantongCoLtdMember
1492 Range [axis] Axis ifrs-full:RangeAxis
1493 Ranges [member] Member ifrs-full:RangesMember
1494 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
1495 Disclosure of associates [line items] LineItems ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesLineItems
1496 Number of shares Concept (Shares) As Of pkx:InvestmentsInAssociatesNumberOfShares
1497 Number of companies in other associates Concept (Integer) For Period pkx:NumberOfCompaniesInOtherAssociates
1498 Ownership (%) Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInAssociate
1499 Investments in associates Concept (Monetary) As Of Debit ifrs-full:InvestmentsInAssociates
1500 Percentage of shares disposed Concept (Percent) For Period pkx:ProportionOfOwnershipInterestDisposed
1501 1121 - Disclosure - Investments in Associates and Joint Ventures - Details of Investments in Associates (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureInvestmentsInAssociatesAndJointVenturesDetailsOfInvestmentsInAssociatesParenthetical
1502 Implied Table Table

*

*

implied:Table
1503 Disclosure of associates [abstract] Abstract ifrs-full:DisclosureOfSignificantInvestmentsInAssociatesAbstract
1504 Investment in associates provided as collateral for borrowings Concept (Monetary) As Of Debit pkx:InvestmentsInAssociatesProvidedAsCollateralForBorrowings
1505 1122 - Disclosure - Investments in Associates and Joint Ventures - Details of Investments in Joint Ventures (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureInvestmentsInAssociatesAndJointVenturesDetailsOfInvestmentsInJointVentures
1506 Disclosure of joint ventures [table] Table

*

*

ifrs-full:DisclosureOfJointVenturesTable
1507 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1508 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1509 Foreign [member] Member ifrs-full:ForeignCountriesMember
1510 Domestic [member] Member ifrs-full:CountryOfDomicileMember
1511 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1512 Book value [Member] Member ifrs-full:CarryingAmountMember
1513 Acquisition cost [member] Member pkx:AcquisitionCostMember
1514 Joint ventures [axis] Axis ifrs-full:JointVenturesAxis
1515 Entity's total for joint ventures [member] Member ifrs-full:EntitysTotalForJointVenturesMember
1516 POSCO MITSUBISHI CARBON TECHNOLOGY [member] Member pkx:POSCOMITSUBISHICARBONTECHNOLOGYMember
1517 Other joint ventures [member] Member pkx:OtherJointVenturesMember
1518 Roy Hill Holdings Pty Ltd. [member] Member pkx:RoyHillHoldingsPtyLtdMember
1519 POSCO-NPS Niobium LLC [member] Member pkx:POSCONPSNiobiumLLCMember
1520 CSP - Compania Siderurgica do Pecem [member] Member pkx:CSPCompaniaSiderurgicadoPecemMember
1521 KOBRASCO [member] Member pkx:KOBRASCOMember
1522 BX STEEL POSCO Cold Rolled Sheet Co., Ltd. [member] Member pkx:BXSTEELPOSCOColdRolledSheetCoLtdMember
1523 DMSA/AMSA [member] Member pkx:DMSAAMSAMember
1524 Disclosure of joint ventures [line items] LineItems ifrs-full:DisclosureOfJointVenturesLineItems
1525 Number of shares Concept (Shares) As Of pkx:InvestmentsInJointVenturesNumberOfShares
1526 Number of companies in other joint ventures Concept (Integer) For Period pkx:NumberOfCompaniesInOtherJointVentures
1527 Ownership (%) Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInJointVenture
1528 Investments in joint ventures Concept (Monetary) As Of Debit ifrs-full:InvestmentsInJointVentures
1529 1123 - Disclosure - Investments in Associates and Joint Ventures - Movements of Investments in Associates and Joint Ventures (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureInvestmentsInAssociatesAndJointVenturesMovementsOfInvestmentsInAssociatesAndJointVentures
1530 Disclosure of investments in associates and joint ventures [Table] Table

*

*

pkx:DisclosureOfInvestmentsInAssociatesAndJointVenturesTable
1531 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1532 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1533 Domestic [member] Member ifrs-full:CountryOfDomicileMember
1534 Foreign [member] Member ifrs-full:ForeignCountriesMember
1535 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
1536 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1537 EQP POSCO Global No1 Natural Resources Private Equity Fund [member] Member pkx:EQPPOSCOGlobalNO1NaturalResourcesPEFMember
1538 Pospower Co Ltd [member] Member pkx:POSPOWERCoLtdMember
1539 SNNC [member] Member pkx:SNNCMember
1540 QSONE Co.,Ltd. [member] Member pkx:QSONECoLtdMember
1541 Chuncheon Energy Co., Ltd. [member] Member pkx:ChuncheonEnergyCoLtdMember
1542 Chungju Enterprise City Development Co.,Ltd [member] Member pkx:CHUNGJUENTERPRISECITYDEVELOPMENTCoLtdMember
1543 Blue Ocean private equity fund [member] Member pkx:BLUEOCEANPrivateEquityFundMember
1544 Daesung Steel [member] Member pkx:DaesungSteelMember
1545 Incheon-Gimpo Expressway Co., Ltd. [member] Member pkx:IncheonGimpoExpresswayCoLtdMember
1546 Keystone NO. 1. Private Equity Fund [member] Member pkx:KeystoneNo1PrivateEquityFundMember
1547 UITrans LRT Co., Ltd. [member] Member pkx:UITransLRTCoLtdMember
1548 KoFC POSCO HANWHA KB Shared Growth No. 2. Private Equity Fund [member] Member pkx:KoFCPOSCOHANWHAKBSharedGrowthNO2PrivateEquityFundMember
1549 KONES, Corp. [member] Member pkx:KONESCorpMember
1550 Other associates and joint ventures [member] Member pkx:OtherAssociatesAndJointVenturesMember
1551 AES-VCM Mong Duong Power Company Limited [member] Member pkx:AESVCMMongDuongPowerCompanyLimitedMember
1552 South-East Asia Gas Pipeline Company Ltd. [member] Member pkx:SouthEastAsiaGasPipelineCompanyLtdMember
1553 7623704 Canada Inc. [member] Member pkx:SevenSixTwoThreeSevenZeroFourCanadaIncMember
1554 Eureka Moly LLC [member] Member pkx:EurekaMolyLLCMember
1555 AMCI (WA) PTY LTD [member] Member pkx:AMCIWAPTYLTDMember
1556 Korea LNG Ltd. [member] Member pkx:KOREALNGLTDMember
1557 Nickel mining company SAS [member] Member pkx:NickelMiningCompanySASMember
1558 NCR LLC [member] Member pkx:NCRLLCMember
1559 PT. batutua tembaga raya [member] Member pkx:PTBatutuaTembagaRayaMember
1560 Zhongyue POSCO (Qinhuangdao) Tinplate Industrial Co., Ltd [member] Member pkx:ZhongyuePOSCOQinhuangdaoTinplateIndustrialCoLtdMember
1561 PT. wampu electric power [member] Member pkx:PTWampuElectricPowerMember
1562 POSCO SeAH Steel Wire(Nantong) Co., Ltd. [member] Member pkx:POSCOSeAHSteelWireNantongCoLtdMember
1563 Joint ventures [axis] Axis ifrs-full:JointVenturesAxis
1564 Entity's total for joint ventures [member] Member ifrs-full:EntitysTotalForJointVenturesMember
1565 POSCO MITSUBISHI CARBON TECHNOLOGY [member] Member pkx:POSCOMITSUBISHICARBONTECHNOLOGYMember
1566 Roy Hill Holdings Pty Ltd. [member] Member pkx:RoyHillHoldingsPtyLtdMember
1567 POSCO-NPS Niobium LLC [member] Member pkx:POSCONPSNiobiumLLCMember
1568 KOBRASCO [member] Member pkx:KOBRASCOMember
1569 BX STEEL POSCO Cold Rolled Sheet Co., Ltd. [member] Member pkx:BXSTEELPOSCOColdRolledSheetCoLtdMember
1570 DMSA/AMSA [member] Member pkx:DMSAAMSAMember
1571 CSP - Compania Siderurgica do Pecem [member] Member pkx:CSPCompaniaSiderurgicadoPecemMember
1572 Disclosure of investments in associates and joint ventures [Line Items] LineItems pkx:DisclosureOfInvestmentsInAssociatesAndJointVenturesLineItems
1573 Number of companies in other associates and joint ventures Concept (Integer) For Period pkx:NumberOfCompaniesInOtherAssociatesAndJointVentures
1574 Book value, beginning balance Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
1575 Acquisition Concept (Monetary) For Period Debit pkx:AcquisitionOfInterestsInInvestmentsAccountedForUsingEquityMethod
1576 Dividends Concept (Monetary) For Period Debit ifrs-full:DividendsReceivedFromInvestmentsAccountedForUsingEquityMethodClassifiedAsInvestingActivities
1577 Share of profits (losses) Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
1578 Other increase (decrease) Concept (Monetary) For Period Debit pkx:OtherIncreaseDecreaseOfInterestsInInvestmentsAccountedForUsingEquityMethod
1579 Book value, ending balance Concept (Monetary) As Of Debit ifrs-full:InvestmentAccountedForUsingEquityMethod
1580 1124 - Disclosure - Investments in Associates and Joint Ventures - Summarized Financial Information of Associates and Joint Ventures (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureInvestmentsInAssociatesAndJointVenturesSummarizedFinancialInformationOfAssociatesAndJointVentures
1581 Disclosure of investments in associates and joint ventures [Table] Table

*

*

pkx:DisclosureOfInvestmentsInAssociatesAndJointVenturesTable
1582 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1583 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1584 Domestic [member] Member ifrs-full:CountryOfDomicileMember
1585 Foreign [member] Member ifrs-full:ForeignCountriesMember
1586 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
1587 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1588 EQP POSCO Global No1 Natural Resources Private Equity Fund [member] Member pkx:EQPPOSCOGlobalNO1NaturalResourcesPEFMember
1589 SNNC [member] Member pkx:SNNCMember
1590 QSONE Co.,Ltd. [member] Member pkx:QSONECoLtdMember
1591 Chuncheon Energy Co., Ltd. [member] Member pkx:ChuncheonEnergyCoLtdMember
1592 Daesung Steel [member] Member pkx:DaesungSteelMember
1593 Incheon-Gimpo Expressway Co., Ltd. [member] Member pkx:IncheonGimpoExpresswayCoLtdMember
1594 Chungju Enterprise City Development Co.,Ltd [member] Member pkx:CHUNGJUENTERPRISECITYDEVELOPMENTCoLtdMember
1595 Blue Ocean private equity fund [member] Member pkx:BLUEOCEANPrivateEquityFundMember
1596 Keystone NO. 1. Private Equity Fund [member] Member pkx:KeystoneNo1PrivateEquityFundMember
1597 UITrans LRT Co., Ltd. [member] Member pkx:UITransLRTCoLtdMember
1598 KoFC POSCO HANWHA KB Shared Growth No. 2. Private Equity Fund [member] Member pkx:KoFCPOSCOHANWHAKBSharedGrowthNO2PrivateEquityFundMember
1599 KONES, Corp. [member] Member pkx:KONESCorpMember
1600 South-East Asia Gas Pipeline Company Ltd. [member] Member pkx:SouthEastAsiaGasPipelineCompanyLtdMember
1601 7623704 Canada Inc. [member] Member pkx:SevenSixTwoThreeSevenZeroFourCanadaIncMember
1602 Korea LNG Ltd. [member] Member pkx:KOREALNGLTDMember
1603 Nickel mining company SAS [member] Member pkx:NickelMiningCompanySASMember
1604 PT. batutua tembaga raya [member] Member pkx:PTBatutuaTembagaRayaMember
1605 Zhongyue POSCO (Qinhuangdao) Tinplate Industrial Co., Ltd [member] Member pkx:ZhongyuePOSCOQinhuangdaoTinplateIndustrialCoLtdMember
1606 PT. wampu electric power [member] Member pkx:PTWampuElectricPowerMember
1607 POSCO SeAH Steel Wire(Nantong) Co., Ltd. [member] Member pkx:POSCOSeAHSteelWireNantongCoLtdMember
1608 Pospower Co Ltd [member] Member pkx:POSPOWERCoLtdMember
1609 Joint ventures [axis] Axis ifrs-full:JointVenturesAxis
1610 Entity's total for joint ventures [member] Member ifrs-full:EntitysTotalForJointVenturesMember
1611 POSCO MITSUBISHI CARBON TECHNOLOGY [member] Member pkx:POSCOMITSUBISHICARBONTECHNOLOGYMember
1612 Roy Hill Holdings Pty Ltd. [member] Member pkx:RoyHillHoldingsPtyLtdMember
1613 POSCO-NPS Niobium LLC [member] Member pkx:POSCONPSNiobiumLLCMember
1614 KOBRASCO [member] Member pkx:KOBRASCOMember
1615 BX STEEL POSCO Cold Rolled Sheet Co., Ltd. [member] Member pkx:BXSTEELPOSCOColdRolledSheetCoLtdMember
1616 DMSA/AMSA [member] Member pkx:DMSAAMSAMember
1617 CSP - Compania Siderurgica do Pecem [member] Member pkx:CSPCompaniaSiderurgicadoPecemMember
1618 Disclosure of investments in associates and joint ventures [Line Items] LineItems pkx:DisclosureOfInvestmentsInAssociatesAndJointVenturesLineItems
1619 Assets Concept (Monetary) As Of Debit ifrs-full:Assets
1620 Liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
1621 Equity Concept (Monetary) As Of Credit ifrs-full:Equity
1622 Sales Concept (Monetary) For Period Credit ifrs-full:Revenue
1623 Net income (loss) Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
1624 1125 - Disclosure - Joint Operations - Details of Significant Joint Operations (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureJointOperationsDetailsOfSignificantJointOperations
1625 Disclosure of joint operations [table] Table

*

*

ifrs-full:DisclosureOfJointOperationsTable
1626 Joint operations [axis] Axis ifrs-full:JointOperationsAxis
1627 Entity's total for joint operations [member] Member ifrs-full:EntitysTotalForJointOperationsMember
1628 Myanmar A-1/A-3 mine [member] Member pkx:MyanmarA1A3mineMember
1629 Offshore midstream [member] Member pkx:OffshoreMidstreamMember
1630 Greenhills mine [member] Member pkx:GreenhillsMineMember
1631 Arctos Anthracite coal project [member] Member pkx:ArctosAnthraciteCoalProjectMember
1632 Mt. Thorley J/V [member] Member pkx:MtThorleyJVMember
1633 POSMAC J/V [member] Member pkx:POSMACJVMember
1634 RUM J/V [member] Member pkx:RUMJVMember
1635 Hanam Gamil package public housing project [member] Member pkx:HanamGamilPackagePublicHousingProjectMember
1636 Hanam-Gamil district B6, C2, C3 block Public housing lot development project [member] Member pkx:HanamgamilDistrictB6C2C3BlockPublicHousingLotDevelopmentProjectMember
1637 Sejong 2-1 P3 Block public housing project [member] Member pkx:Sejong21P3BlockPublicHousingProjectMember
1638 Yongin-Giheung Station area city development project [member] Member pkx:YonginGheungStationAreaCityDevelopmentProjectMember
1639 Korean wave world complex land multi-purpose building development project [member] Member pkx:KoreanWaveWorldComplexLandMultipurposeBuildingDevelopmentProjectMember
1640 Sejong 4-1 P3 Block public housing project [member] Member pkx:Sejong41P3BlockPublicHousingProjectMember
1641 Disclosure of joint operations [line items] LineItems ifrs-full:DisclosureOfJointOperationsLineItems
1642 Category of business Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities
1643 Ownership (%) Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInJointOperation
1644 Location Concept (Text/String) For Period ifrs-full:PrincipalPlaceOfBusinessOfJointOperation
1645 1126 - Disclosure - Investment Property, Net - Summary of Investment Property (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureInvestmentPropertyNetSummaryOfInvestmentProperty
1646 Disclosure of detailed information about investment property [table] Table

*

*

ifrs-full:DisclosureOfInvestmentPropertyTable
1647 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1648 Book value [Member] Member ifrs-full:CarryingAmountMember
1649 Gross amount [member] Member ifrs-full:GrossCarryingAmountMember
1650 Accumulated depreciation, amortization and impairment [member] Member ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
1651 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1652 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
1653 Land [member] Member ifrs-full:LandMember
1654 Buildings [member] Member ifrs-full:BuildingsMember
1655 Structures [member] Member pkx:StructuresMember
1656 Construction-in-progress [member] Member ifrs-full:ConstructionInProgressMember
1657 Disclosure of detailed information about investment property [line items] LineItems ifrs-full:DisclosureOfInvestmentPropertyLineItems
1658 Investment property Concept (Monetary) As Of Debit ifrs-full:InvestmentProperty
1659 1127 - Disclosure - Investment Property, Net - Additional Information (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureInvestmentPropertyNetAdditionalInformation
1660 Disclosure of detailed information about investment property [table] Table

*

*

ifrs-full:DisclosureOfInvestmentPropertyTable
1661 Measurement [axis] Axis ifrs-full:MeasurementAxis
1662 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
1663 Fair value [member] Member ifrs-full:AtFairValueMember
1664 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1665 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1666 6 Subsidiaries, including POSCO(Dalian) IT Center Development Co.,Ltd [member] Member pkx:SixSubsidiariesMember
1667 Disclosure of detailed information about investment property [line items] LineItems ifrs-full:DisclosureOfInvestmentPropertyLineItems
1668 Investment property Concept (Monetary) As Of Debit ifrs-full:InvestmentProperty
1669 1128 - Disclosure - Investment Property, Net - Changes in Carrying Amount of Investment Property (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureInvestmentPropertyNetChangesInCarryingAmountOfInvestmentProperty
1670 Disclosure of detailed information about investment property [table] Table

*

*

ifrs-full:DisclosureOfInvestmentPropertyTable
1671 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1672 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
1673 Land [member] Member ifrs-full:LandMember
1674 Buildings [member] Member ifrs-full:BuildingsMember
1675 Structures [member] Member pkx:StructuresMember
1676 Construction-in-progress [member] Member ifrs-full:ConstructionInProgressMember
1677 Disclosure of detailed information about investment property [line items] LineItems ifrs-full:DisclosureOfInvestmentPropertyLineItems
1678 Beginning Concept (Monetary) As Of Debit ifrs-full:InvestmentProperty
1679 Acquisitions Concept (Monetary) For Period Debit ifrs-full:AdditionsFromAcquisitionsInvestmentProperty
1680 Disposals Concept (Monetary) For Period Credit ifrs-full:DisposalsInvestmentProperty
1681 Depreciation Concept (Monetary) For Period pkx:DepreciationAndImpairmentLossRecognisedInProfitOrLossInvestmentProperty
1682 Others Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughOtherChangesInvestmentProperty
1683 Ending Concept (Monetary) As Of Debit ifrs-full:InvestmentProperty
1684 1129 - Disclosure - Investment Property, Net - Changes in Carrying Amount of Investment Property (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureInvestmentPropertyNetChangesInCarryingAmountOfInvestmentPropertyParenthetical
1685 Disclosure of detailed information about investment property [table] Table

*

*

ifrs-full:DisclosureOfInvestmentPropertyTable
1686 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1687 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1688 POSCO(Dalian) IT Center Development Co., Ltd. [member] Member pkx:POSCODalianITCenterDevelopmentCoLtdMember
1689 Disclosure of detailed information about investment property [line items] LineItems ifrs-full:DisclosureOfInvestmentPropertyLineItems
1690 Impairment loss on investment property Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossInvestmentProperty
1691 1130 - Disclosure - Property, Plant and Equipment, Net - Summary of Property, Plant and Equipment (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetSummaryOfPropertyPlantAndEquipment
1692 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1693 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1694 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
1695 Land [member] Member ifrs-full:LandMember
1696 Buildings [member] Member ifrs-full:BuildingsMember
1697 Structures [member] Member pkx:StructuresMember
1698 Machinery and equipment [member] Member ifrs-full:MachineryMember
1699 Vehicles [member] Member ifrs-full:VehiclesMember
1700 Tools [member] Member pkx:ToolsMember
1701 Furniture and fixtures [member] Member ifrs-full:FixturesAndFittingsMember
1702 Finance lease assets [member] Member pkx:PropertyPlantAndEquipmentUnderFinanceLeasesMember
1703 Bearer plants [member] Member ifrs-full:BearerPlantsMember
1704 Construction-in-progress [member] Member ifrs-full:ConstructionInProgressMember
1705 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1706 Book value [Member] Member ifrs-full:CarryingAmountMember
1707 Gross amount [member] Member ifrs-full:GrossCarryingAmountMember
1708 Accumulated depreciation, amortization and impairment [member] Member ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
1709 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1710 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1711 Government grants Concept (Monetary) As Of Debit pkx:PropertyPlantAndEquipmentAcquiredByWayOfGovernmentGrant
1712 1131 - Disclosure - Property, Plant and Equipment, Net - Changes in Carrying Amount of Property, Plant and Equipment (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetChangesInCarryingAmountOfPropertyPlantAndEquipment
1713 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1714 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1715 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
1716 Land [member] Member ifrs-full:LandMember
1717 Buildings [member] Member ifrs-full:BuildingsMember
1718 Structures [member] Member pkx:StructuresMember
1719 Machinery and equipment [member] Member ifrs-full:MachineryMember
1720 Vehicles [member] Member ifrs-full:VehiclesMember
1721 Tools [member] Member pkx:ToolsMember
1722 Furniture and fixtures [member] Member ifrs-full:FixturesAndFittingsMember
1723 Finance lease assets [member] Member pkx:PropertyPlantAndEquipmentUnderFinanceLeasesMember
1724 Construction-in-progress [member] Member ifrs-full:ConstructionInProgressMember
1725 Bearer plants [member] Member ifrs-full:BearerPlantsMember
1726 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
1727 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1728 Synthetic Natural Gas [Member] Member pkx:SyntheticNaturalGasMember
1729 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1730 Beginning Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1731 Acquisitions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
1732 Disposals Concept (Monetary) For Period Credit ifrs-full:DisposalsPropertyPlantAndEquipment
1733 Depreciation Concept (Monetary) For Period ifrs-full:DepreciationPropertyPlantAndEquipment
1734 Impairment loss Concept (Monetary) For Period Debit pkx:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
1735 Others Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughOtherChangesPropertyPlantAndEquipment
1736 Ending Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1737 Property plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
1738 1132 - Disclosure - Property, Plant and Equipment, Net - Changes in Carrying Amount of Property, Plant and Equipment (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetChangesInCarryingAmountOfPropertyPlantAndEquipmentParenthetical
1739 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1740 Individual assets or cash-generating units [axis] Axis ifrs-full:IndividualAssetsOrCashgeneratingUnitsAxis
1741 Entity's total for individual assets or cash-generating units [member] Member ifrs-full:EntitysTotalForIndividualAssetsOrCashgeneratingUnitsMember
1742 Fuel cell business [member] Member pkx:FuelCellBusinessMember
1743 Individual assets based on disposal plans [member] Member ifrs-full:IndividualAssetsOrCashgeneratingUnitsMember
1744 Strip casting facilities [member] Member pkx:StripCastingFacilitiesMember
1745 Associates [axis] Axis ifrs-full:SignificantInvestmentsInAssociatesAxis
1746 Entity's total for associates [member] Member ifrs-full:EntitysTotalForAssociatesMember
1747 Synthetic Natural Gas [Member] Member pkx:SyntheticNaturalGasMember
1748 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1749 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1750 POSCO ENERGY CO., LTD. [member] Member pkx:POSCOENERGYCOLTDMember
1751 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1752 Impairment loss on property, plant and equipment Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
1753 1133 - Disclosure - Property, Plant and Equipment, Net - Borrowing Costs Capitalized and Capitalized Interest Rate (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetBorrowingCostsCapitalizedAndCapitalizedInterestRate
1754 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1755 Range [axis] Axis ifrs-full:RangeAxis
1756 Ranges [member] Member ifrs-full:RangesMember
1757 Weighted average [member] Member ifrs-full:WeightedAverageMember
1758 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
1759 Top of range [member] Member ifrs-full:TopOfRangeMember
1760 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1761 Expenditure Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
1762 Borrowing costs capitalized Concept (Monetary) For Period ifrs-full:BorrowingCostsCapitalised
1763 Capitalization rate (%) Concept (Percent) For Period ifrs-full:CapitalisationRateOfBorrowingCostsEligibleForCapitalisation
1764 1134 - Disclosure - Property, Plant and Equipment, Net - Property, Plant and Equipment and Investment Property Pledged as Collateral (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetPropertyPlantAndEquipmentAndInvestmentPropertyPledgedAsCollateral
1765 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1766 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1767 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
1768 Land [member] Member ifrs-full:LandMember
1769 Buildings and structures [member] Member pkx:BuildingsAndStructuresMember
1770 Machinery and equipment [member] Member ifrs-full:MachineryMember
1771 Construction-in-progress [member] Member ifrs-full:ConstructionInProgressMember
1772 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
1773 Counterparties [member] Member ifrs-full:CounterpartiesMember
1774 Korean Development Bank and others [member] Member pkx:KoreanDevelopmentBankAndOthersMember
1775 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1776 Property, plant and equipment and investment property pledged as collateral Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipmentPledgedAsSecurity
1777 1135 - Disclosure - Property, Plant and Equipment, Net - Property, Plant and Equipment and Investment Property Pledged as Collateral (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosurePropertyPlantAndEquipmentNetPropertyPlantAndEquipmentAndInvestmentPropertyPledgedAsCollateralParenthetical
1778 Disclosure of detailed information about property, plant and equipment [table] Table

*

*

ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
1779 Assets and liabilities [axis] Axis ifrs-full:AssetsAndLiabilitiesAxis
1780 Assets and liabilities [member] Member ifrs-full:AssetsAndLiabilitiesMember
1781 Investment Property And Other Assets [member] Member pkx:InvestmentPropertyAndOtherAssetsMember
1782 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
1783 Assets pledged as collateral Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipmentPledgedAsSecurity
1784 1136 - Disclosure - Goodwill and Other Intangible Assets, Net - Summary of Goodwill and Other Intangible Assets (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureGoodwillAndOtherIntangibleAssetsNetSummaryOfGoodwillAndOtherIntangibleAssets
1785 Disclosure of detailed information about intangible assets [table] Table

*

*

ifrs-full:DisclosureOfIntangibleAssetsTable
1786 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1787 Book value [Member] Member ifrs-full:CarryingAmountMember
1788 Gross amount [member] Member ifrs-full:GrossCarryingAmountMember
1789 Accumulated depreciation, amortization and impairment [member] Member ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
1790 Classes of intangible assets and goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
1791 Intangible assets and goodwill [member] Member ifrs-full:IntangibleAssetsAndGoodwillMember
1792 Goodwill [member] Member ifrs-full:GoodwillMember
1793 Intellectual property rights [member] Member ifrs-full:CopyrightsPatentsAndOtherIndustrialPropertyRightsServiceAndOperatingRightsMember
1794 Premium in rental [member] Member pkx:PremiumInRentalMember
1795 Development costs [member] Member ifrs-full:CapitalisedDevelopmentExpenditureMember
1796 Port facilities usage rights [member] Member pkx:PortFacilitiesUsageRightsMember
1797 Exploration and evaluation assets [member] Member ifrs-full:ExplorationAndEvaluationAssetsMember
1798 Customer relationships [member] Member ifrs-full:CustomerrelatedIntangibleAssetsMember
1799 Power generation permit [member] Member pkx:PowerGenerationPermitMember
1800 Other intangible assets [member] Member ifrs-full:OtherIntangibleAssetsMember
1801 Disclosure of detailed information about intangible assets [line items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
1802 Goodwill and other intangible assets Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsAndGoodwill
1803 Government grants Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsAcquiredByWayOfGovernmentGrant
1804 1137 - Disclosure - Goodwill and Other Intangible Assets, Net - Changes in Carrying Amount of Goodwill and Other Intangible Assets (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureGoodwillAndOtherIntangibleAssetsNetChangesInCarryingAmountOfGoodwillAndOtherIntangibleAssets
1805 Disclosure of reconciliation of changes in intangible assets and goodwill [table] Table

*

*

ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable
1806 Classes of intangible assets and goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
1807 Intangible assets and goodwill [member] Member ifrs-full:IntangibleAssetsAndGoodwillMember
1808 Goodwill [member] Member ifrs-full:GoodwillMember
1809 Intellectual property rights [member] Member ifrs-full:CopyrightsPatentsAndOtherIndustrialPropertyRightsServiceAndOperatingRightsMember
1810 Premium in rental [member] Member pkx:PremiumInRentalMember
1811 Development costs [member] Member ifrs-full:CapitalisedDevelopmentExpenditureMember
1812 Port facilities usage rights [member] Member pkx:PortFacilitiesUsageRightsMember
1813 Exploration and evaluation assets [member] Member ifrs-full:ExplorationAndEvaluationAssetsMember
1814 Customer relationships [member] Member ifrs-full:CustomerrelatedIntangibleAssetsMember
1815 Power generation permit [member] Member pkx:PowerGenerationPermitMember
1816 Other intangible assets [member] Member ifrs-full:OtherIntangibleAssetsMember
1817 Disclosure of reconciliation of changes in intangible assets and goodwill [line items] LineItems ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems
1818 Beginning Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsAndGoodwill
1819 Acquisitions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
1820 Business combination Concept (Monetary) For Period Debit ifrs-full:AcquisitionsThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
1821 Disposals Concept (Monetary) For Period Credit ifrs-full:DisposalsIntangibleAssetsAndGoodwill
1822 Amortization Concept (Monetary) For Period ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
1823 Impairment loss Concept (Monetary) For Period pkx:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossIntangibleAssetsAndGoodwill
1824 Others Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughOtherChangesIntangibleAssetsAndGoodwill
1825 Ending Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsAndGoodwill
1826 1138 - Disclosure - Goodwill and Other Intangible Assets, Net - Allocation of Goodwill to Individually Operating Entities Which are Determined to be CGUs (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureGoodwillAndOtherIntangibleAssetsNetAllocationOfGoodwillToIndividuallyOperatingEntitiesWhichAreDeterminedToBeCGUs
1827 Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [table] Table

*

*

ifrs-full:DisclosureOfInformationForEachMaterialImpairmentLossRecognisedOrReversedForIndividualAssetOrCashgeneratingUnitTable
1828 Cash-generating units [axis] Axis ifrs-full:IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis
1829 Entity's total for cash-generating units [member] Member ifrs-full:EntitysTotalForCashgeneratingUnitsMember
1830 POSCO VST Co., Ltd. [member] Member pkx:POSCOVSTCOLTDMember
1831 Others [member] Member pkx:OtherCashGeneratingUnitsMember
1832 POSCO DAEWOO Corporation [member] Member pkx:POSCODAEWOOCorporationMember
1833 PT. Bio Inti Agrindo [member] Member pkx:PTBioIntiAgrindoMember
1834 POSCO ENGINEERING & CONSTRUCTION CO., LTD. [member] Member pkx:POSCOENGINEERINGAndCONSTRUCTIONCOLTDMember
1835 POSCO ENERGY CO., LTD. [member] Member pkx:POSCOENERGYCOLTDMember
1836 POSCO Center Beijing [member] Member pkx:POSCOCenterBeijingMember
1837 Segments [axis] Axis ifrs-full:SegmentsAxis
1838 Segments [member] Member ifrs-full:SegmentsMember
1839 Steel [member] Member pkx:SteelMember
1840 Trading [member] Member pkx:TradingMember
1841 Construction [member] Member pkx:ConstructionMember
1842 Other reportable segment [member] Member ifrs-full:AllOtherSegmentsMember
1843 Others [member] Member pkx:OtherCashGeneratingUnitsMember
1844 Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] LineItems ifrs-full:DisclosureOfInformationForEachMaterialImpairmentLossRecognisedOrReversedForIndividualAssetOrCashgeneratingUnitLineItems
1845 Total number of CGUs Concept (Integer) For Period pkx:NumberOfCashGeneratingUnits
1846 CGUs Concept (Text/String) For Period ifrs-full:DescriptionOfCashgeneratingUnit
1847 Goodwill Concept (Monetary) As Of Debit ifrs-full:Goodwill
1848 Discount rate Concept (Percent) As Of ifrs-full:DescriptionOfDiscountRatesAppliedToCashFlowProjections
1849 Terminal growth rate Concept (Percent) As Of ifrs-full:DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections
1850 Period for the estimated future cash flows Concept (Text/String) For Period ifrs-full:ExplanationOfPeriodOverWhichManagementHasProjectedCashFlows
1851 Impairment loss on goodwill Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill
1852 Discount rate increase Concept (Percent) For Period pkx:PercentageIncreaseInDiscountRate
1853 Value in use decrease due to increase in discount rate Concept (Percent) As Of pkx:EstimatedPercentageDecreaseInValueInUseDueToPossibleIncreaseInDiscountRate
1854 Terminal growth rate decrease Concept (Percent) As Of pkx:PercentageDecreaseInGrowthRate
1855 Value in use decrease due to decrease in terminal growth rate Concept (Percent) As Of pkx:EstimatedPercentageDecreaseInValueInUseDueToPossibleDecreaseInGrowthRate
1856 Value in use decrease due to increase in discount rate, amount Concept (Monetary) For Period Credit pkx:EstimatedDecreaseInValueInUseDueToPossibleIncreaseInDiscountRate
1857 Value in use decrease due to decrease in terminal growth rate, amount Concept (Monetary) For Period Credit pkx:EstimatedDecreaseInValueInUseDueToPossibleDecreaseInGrowthRate
1858 1139 - Disclosure - Other Assets - Summary of Other Current Assets and Other Non-Current Assets (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureOtherAssetsSummaryOfOtherCurrentAssetsAndOtherNonCurrentAssets
1859 Implied Table Table

*

*

implied:Table
1860 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
1861 Current Abstract ifrs-full:MiscellaneousCurrentAssetsAbstract
1862 Advance payment Concept (Monetary) As Of Debit ifrs-full:CurrentAdvancesToSuppliers
1863 Prepaid expenses Concept (Monetary) As Of Debit ifrs-full:CurrentPrepaidExpenses
1864 Firm commitment asset Concept (Monetary) As Of Debit pkx:CurrentFirmCommitmentAsset
1865 Others Concept (Monetary) As Of Debit pkx:OtherMiscellaneousCurrentAssets
1866 Other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentNonfinancialAssets
1867 Non-current Abstract ifrs-full:MiscellaneousNoncurrentAssetsAbstract
1868 Long-term advance payment Concept (Monetary) As Of Debit pkx:LongtermAdvancePayments
1869 Long-term prepaid expenses Concept (Monetary) As Of Debit ifrs-full:NoncurrentPrepayments
1870 Others Concept (Monetary) As Of Debit pkx:OtherMiscellaneousNoncurrentAssets
1871 Other non-current assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentNonfinancialAssets
1872 1140 - Disclosure - Other Assets - Summary of Other Current Assets and Other Non-Current Assets (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureOtherAssetsSummaryOfOtherCurrentAssetsAndOtherNonCurrentAssetsParenthetical
1873 Implied Table Table

*

*

implied:Table
1874 Subclassifications of assets, liabilities and equities [abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
1875 Tax assets Concept (Monetary) As Of Debit ifrs-full:CurrentTaxAssetsNoncurrent
1876 1141 - Disclosure - Borrowings - Short-term Borrowings and Current Portion of Long-term Borrowings (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureBorrowingsShorttermBorrowingsAndCurrentPortionOfLongtermBorrowings
1877 Disclosure of detailed information about borrowings [table] Table

*

*

ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1878 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1879 Book value [Member] Member ifrs-full:CarryingAmountMember
1880 Gross amount [member] Member ifrs-full:GrossCarryingAmountMember
1881 Discount on debentures [member] Member pkx:DiscountOnDebenturesMember
1882 Range [axis] Axis ifrs-full:RangeAxis
1883 Ranges [member] Member ifrs-full:RangesMember
1884 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
1885 Top of range [member] Member ifrs-full:TopOfRangeMember
1886 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1887 Borrowings [Member] Member ifrs-full:BorrowingsByNameMember
1888 Short-term borrowings [member] Member ifrs-full:ShorttermBorrowingsMember
1889 Current portion of long-term liabilities [member] Member pkx:CurrentPortionOfLongTermLiabilitiesMember
1890 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
1891 Counterparties [member] Member ifrs-full:CounterpartiesMember
1892 JP Morgan and others [member] Member pkx:JPMorganMember
1893 HSBC and others [member] Member pkx:HSBCAndOthersMember
1894 Export-Import Bank of Korea and others [member] Member pkx:ExportImportBankOfKoreaAndOthersMember
1895 Korean Development Bank and others [member] Member pkx:KoreanDevelopmentBankAndOthersMember
1896 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1897 Issuance date Concept (Text/String) For Period pkx:BorrowingsIssuanceDate
1898 Maturity date Concept (Text/String) For Period ifrs-full:BorrowingsMaturity
1899 Interest rate (%) Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
1900 Short-term borrowings Concept (Monetary) As Of Credit ifrs-full:ShorttermBorrowings
1901 Current portion of debentures Concept (Monetary) As Of Credit ifrs-full:CurrentPortionOfLongtermBorrowings
1902 Current borrowings and current portion of non-current borrowings Concept (Monetary) As Of Credit ifrs-full:CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings
1903 1142 - Disclosure - Borrowings - Long-term Borrowings, Excluding Current Portion (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureBorrowingsLongtermBorrowingsExcludingCurrentPortion
1904 Disclosure of detailed information about borrowings [table] Table

*

*

ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
1905 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
1906 Book value [Member] Member ifrs-full:CarryingAmountMember
1907 Gross amount [member] Member ifrs-full:GrossCarryingAmountMember
1908 Present value discount [member] Member pkx:PresentValueDiscountMember
1909 Discount on debentures [member] Member pkx:DiscountOnDebenturesMember
1910 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
1911 Counterparties [member] Member ifrs-full:CounterpartiesMember
1912 Export-Import Bank of Korea and others [member] Member pkx:ExportImportBankOfKoreaAndOthersMember
1913 KB Securities and others [member] Member pkx:KBSecuritiesAndOthersMember
1914 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
1915 Borrowings [Member] Member ifrs-full:BorrowingsByNameMember
1916 Long-term borrowings [member] Member ifrs-full:LongtermBorrowingsMember
1917 Range [axis] Axis ifrs-full:RangeAxis
1918 Ranges [member] Member ifrs-full:RangesMember
1919 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
1920 Top of range [member] Member ifrs-full:TopOfRangeMember
1921 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
1922 Issuance date Concept (Text/String) For Period pkx:BorrowingsIssuanceDate
1923 Maturity date Concept (Text/String) For Period ifrs-full:BorrowingsMaturity
1924 Interest rate (%) Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
1925 Long-term borrowings, excluding current portion Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
1926 1143 - Disclosure - Borrowings - Summary of Assets Pledges as Collateral (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureBorrowingsSummaryOfAssetsPledgesAsCollateral
1927 Disclosure Of Assets Pledged As Collateral [table] Table

*

*

pkx:DisclosureOfAssetsPledgedAsCollateralTable
1928 Classes of assets [axis] Axis ifrs-full:ClassesOfAssetsAxis
1929 Assets [member] Member ifrs-full:ClassesOfAssetsMember
1930 Property, plant and equipment including investment property [member] Member pkx:PropertyPlantAndEquipmentIncludingInvestmentPropertyMember
1931 Trade accounts and notes receivables, net [member] Member pkx:TradeAccountsAndNotesReceivablesMember
1932 Inventories [member] Member pkx:Inventories1Member
1933 Cash and cash equivalents [member] Member pkx:CashAndCashEquivalents1Member
1934 Shinhan Bank [member] Member pkx:ShinhanBankMember
1935 Fair value as deemed cost [axis] Axis ifrs-full:FairValueAsDeemedCostAxis
1936 Aggregate of fair values [member] Member ifrs-full:AggregateOfFairValuesMember
1937 Book value [member] Member pkx:BookValueMember
1938 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
1939 Counterparties [member] Member ifrs-full:CounterpartiesMember
1940 Korean Development Bank and others [member] Member pkx:KoreanDevelopmentBankAndOthersMember
1941 Export-Import Bank of Korea and others [member] Member pkx:ExportImportBankOfKoreaAndOthersMember
1942 Kookmin Bank and Others [member] Member pkx:KookminBankAndOthersMember
1943 Shinhan Bank [member] Member pkx:ShinhanBankMember
1944 Disclosure Of Assets Pledged As Collateral [line items] LineItems pkx:DisclosureOfAssetsPledgedAsCollateralLineItems
1945 Assets Concept (Monetary) As Of Debit pkx:AssetBookValue
1946 Pledged amount Concept (Monetary) As Of Debit ifrs-full:AssetsHeldAsCollateralPermittedToBeSoldOrRepledgedAtFairValue
1947 1144 - Disclosure - Other Payables - Summary of Other Payables (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureOtherPayablesSummaryOfOtherPayables
1948 Implied Table Table

*

*

implied:Table
1949 Trade and other payables [abstract] Abstract ifrs-full:TradeAndOtherPayablesAbstract
1950 Current Abstract ifrs-full:TradeAndOtherCurrentPayablesAbstract
1951 Accounts payable Concept (Monetary) As Of Credit pkx:CurrentAccountsPayable
1952 Accrued expenses Concept (Monetary) As Of Credit ifrs-full:AccrualsClassifiedAsCurrent
1953 Dividend payable Concept (Monetary) As Of Credit ifrs-full:CurrentDividendPayables
1954 Finance lease liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentFinanceLeaseLiabilities
1955 Withholdings Concept (Monetary) As Of Credit pkx:CurrentWithholdings
1956 Other payables, current Concept (Monetary) As Of Credit ifrs-full:OtherCurrentPayables
1957 Non-current Abstract ifrs-full:NoncurrentPayablesAbstract
1958 Accounts payable Concept (Monetary) As Of Credit ifrs-full:NoncurrentPayablesToTradeSuppliers
1959 Accrued expenses Concept (Monetary) As Of Credit ifrs-full:AccrualsClassifiedAsNoncurrent
1960 Finance lease liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinanceLeaseLiabilities
1961 Long-term withholdings Concept (Monetary) As Of Credit pkx:LongTermWithholdings
1962 Other payables, non-current Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentPayables
1963 1145 - Disclosure - Other Financial Liabilities - Summary of Other Financial Liabilities (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureOtherFinancialLiabilitiesSummaryOfOtherFinancialLiabilities
1964 Implied Table Table

*

*

implied:Table
1965 Categories of financial liabilities [abstract] Abstract ifrs-full:CategoriesOfFinancialLiabilitiesAbstract
1966 Current Abstract ifrs-full:CurrentLiabilitiesAbstract
1967 Derivatives liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentDerivativeFinancialLiabilities
1968 Financial guarantee liabilities Concept (Monetary) As Of Credit pkx:FinancialGuaranteeLiabilitiesCurrent
1969 Other financial liabilities, current Concept (Monetary) As Of Credit ifrs-full:OtherCurrentFinancialLiabilities
1970 Non-current Abstract ifrs-full:NoncurrentLiabilitiesAbstract
1971 Derivatives liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentDerivativeFinancialLiabilities
1972 Financial guarantee liabilities Concept (Monetary) As Of Credit pkx:FinancialGuaranteeLiabilitiesNoncurrent
1973 Other financial liabilities, non-current Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentFinancialLiabilities
1974 1146 - Disclosure - Provisions - Summary of Provisions (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureProvisionsSummaryOfProvisions
1975 Disclosure of other provisions [table] Table

*

*

ifrs-full:DisclosureOfOtherProvisionsTable
1976 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
1977 Others [Member] Member ifrs-full:OtherProvisionsMember
1978 Provision for bonus payments [member] Member pkx:EmployeeRelatedProvisionsMember
1979 Provision for construction warranties [member] Member ifrs-full:WarrantyProvisionMember
1980 Provision for legal contingencies and claims [member] Member ifrs-full:LegalProceedingsProvisionMember
1981 Provisions for the restoration [member] Member ifrs-full:ProvisionForDecommissioningRestorationAndRehabilitationCostsMember
1982 Others [member] Member ifrs-full:MiscellaneousOtherProvisionsMember
1983 Disclosure of other provisions [line items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
1984 Current Concept (Monetary) As Of Credit ifrs-full:OtherShorttermProvisions
1985 Non-current Concept (Monetary) As Of Credit ifrs-full:OtherLongtermProvisions
1986 1147 - Disclosure - Provisions - Summary of Provisions (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureProvisionsSummaryOfProvisionsParenthetical
1987 Disclosure of other provisions [table] Table

*

*

ifrs-full:DisclosureOfOtherProvisionsTable
1988 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
1989 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
1990 Land [member] Member ifrs-full:LandMember
1991 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
1992 Others [Member] Member ifrs-full:OtherProvisionsMember
1993 Others [member] Member ifrs-full:MiscellaneousOtherProvisionsMember
1994 Lawsuits provision [member] Member pkx:LawsuitsProvisionMember
1995 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1996 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1997 Gangneung province [member] Member pkx:GangneungProvinceMember
1998 Pohang work [member] Member pkx:PohangWorkMember
1999 Range [axis] Axis ifrs-full:RangeAxis
2000 Ranges [member] Member ifrs-full:RangesMember
2001 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
2002 Top of range [member] Member ifrs-full:TopOfRangeMember
2003 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2004 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
2005 POSCO ENERGY CO., LTD. [member] Member pkx:POSCOENERGYCOLTDMember
2006 POSCO ENGINEERING & CONSTRUCTION CO., LTD. [member] Member pkx:POSCOENGINEERINGAndCONSTRUCTIONCOLTDMember
2007 Disclosure of other provisions [line items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
2008 Other provisions Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
2009 Discount rates Concept (Percent) As Of ifrs-full:DescriptionOfDiscountRatesUsedInCurrentEstimateOfValueInUse
2010 1148 - Disclosure - Provisions - Changes in Provisions (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureProvisionsChangesInProvisions
2011 Disclosure of other provisions [table] Table

*

*

ifrs-full:DisclosureOfOtherProvisionsTable
2012 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
2013 Others [Member] Member ifrs-full:OtherProvisionsMember
2014 Provision for bonus payments [member] Member pkx:EmployeeRelatedProvisionsMember
2015 Provision for construction warranties [member] Member ifrs-full:WarrantyProvisionMember
2016 Provision for legal contingencies and claims [member] Member ifrs-full:LegalProceedingsProvisionMember
2017 Provisions for the restoration [member] Member ifrs-full:ProvisionForDecommissioningRestorationAndRehabilitationCostsMember
2018 Others [member] Member ifrs-full:MiscellaneousOtherProvisionsMember
2019 Disclosure of other provisions [line items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
2020 Beginning Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
2021 Increase Concept (Monetary) For Period Credit ifrs-full:AdditionalProvisionsOtherProvisions
2022 Utilization Concept (Monetary) For Period Debit ifrs-full:ProvisionUsedOtherProvisions
2023 Reversal Concept (Monetary) For Period Debit ifrs-full:UnusedProvisionReversedOtherProvisions
2024 Others Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions
2025 Ending Concept (Monetary) As Of Credit ifrs-full:OtherProvisions
2026 1149 - Disclosure - Employee Benefits - Expense Related to Post-employment Benefit Plans under Defined Contribution Plans (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeeBenefitsExpenseRelatedToPostemploymentBenefitPlansUnderDefinedContributionPlans
2027 Implied Table Table

*

*

implied:Table
2028 Disclosure of defined benefit plans [abstract] Abstract ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
2029 Expense related to post-employment benefit plans under defined contribution plans Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedContributionPlans
2030 1150 - Disclosure - Employee Benefits - Amounts Recognized in Relation to Net Defined Benefit Liabilities in Statements of Financial Position (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeeBenefitsAmountsRecognizedInRelationToNetDefinedBenefitLiabilitiesInStatementsOfFinancialPosition
2031 Implied Table Table

*

*

implied:Table
2032 Disclosure of defined benefit plans [abstract] Abstract ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
2033 Present value of funded obligations Concept (Monetary) As Of Credit pkx:FundedDefinedBenefitObligationAtPresentValue
2034 Fair value of plan assets Concept (Monetary) As Of Debit ifrs-full:PlanAssetsAtFairValue
2035 Present value of non-funded obligations Concept (Monetary) As Of Credit pkx:UnfundedDefinedBenefitObligationAtPresentValue
2036 Net defined benefit liabilities Concept (Monetary) As Of Debit ifrs-full:SurplusDeficitInPlan
2037 1151 - Disclosure - Employee Benefits - Amounts Recognized in Relation to Net Defined Benefit Liabilities in Statements of Financial Position (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeeBenefitsAmountsRecognizedInRelationToNetDefinedBenefitLiabilitiesInStatementsOfFinancialPositionParenthetical
2038 Implied Table Table

*

*

implied:Table
2039 Disclosure of defined benefit plans [abstract] Abstract ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
2040 Net defined benefit assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentRecognisedAssetsDefinedBenefitPlan
2041 1152 - Disclosure - Employee Benefits - Changes in Present Value of Defined Benefit Obligations (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeeBenefitsChangesInPresentValueOfDefinedBenefitObligations
2042 Disclosure of net defined benefit liability (asset) [table] Table

*

*

ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
2043 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
2044 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
2045 Defined benefit obligations [member] Member ifrs-full:PresentValueOfDefinedBenefitObligationMember
2046 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
2047 Beginning of period Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2048 Current service costs Concept (Monetary) For Period Credit ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
2049 Interest Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
2050 Remeasurements Concept (Monetary) For Period Debit ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset
2051 - Gain from change in financial assumptions Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
2052 - Loss (gain) from change in demographic assumptions Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset
2053 - Others Concept (Monetary) For Period Debit pkx:ActuarialGainsLossesArisingFromOtherChangesNetDefinedBenefitLiabilityAsset
2054 Benefits paid Concept (Monetary) For Period Debit ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
2055 Others Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset
2056 End of period Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2057 1153 - Disclosure - Employee Benefits - Changes in Fair Value of Plan Assets (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeeBenefitsChangesInFairValueOfPlanAssets
2058 Disclosure of net defined benefit liability (asset) [table] Table

*

*

ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetTable
2059 Net defined benefit liability (asset) [axis] Axis ifrs-full:NetDefinedBenefitLiabilityAssetAxis
2060 Net defined benefit liability (asset) [member] Member ifrs-full:NetDefinedBenefitLiabilityAssetMember
2061 Plan assets [member] Member ifrs-full:PlanAssetsMember
2062 Disclosure of net defined benefit liability (asset) [line items] LineItems ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetLineItems
2063 Beginning of period Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2064 Interest Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
2065 Remeasurements Concept (Monetary) For Period Debit ifrs-full:GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset
2066 Contributions to plan assets Concept (Monetary) For Period Debit ifrs-full:ContributionsToPlanNetDefinedBenefitLiabilityAsset
2067 Benefits paid Concept (Monetary) For Period Debit ifrs-full:PaymentsFromPlanNetDefinedBenefitLiabilityAsset
2068 Others Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherChangesNetDefinedBenefitLiabilityAsset
2069 End of period Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
2070 1154 - Disclosure - Employee Benefits - Additional Information (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeeBenefitsAdditionalInformation
2071 Implied Table Table

*

*

implied:Table
2072 Disclosure of net defined benefit liability (asset) [abstract] Abstract ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetAbstract
2073 Estimated contribution to the defined benefit plan assets Concept (Monetary) For Period Credit ifrs-full:EstimateOfContributionsExpectedToBePaidToPlan
2074 1155 - Disclosure - Employee Benefits - Fair Value of Plan Assets (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeeBenefitsFairValueOfPlanAssets
2075 Implied Table Table

*

*

implied:Table
2076 Disclosure of fair value of plan assets [abstract] Abstract ifrs-full:DisclosureOfFairValueOfPlanAssetsAbstract
2077 Equity instruments Concept (Monetary) As Of Debit ifrs-full:EquityInstrumentsAmountContributedToFairValueOfPlanAssets
2078 Debt instruments Concept (Monetary) As Of Debit ifrs-full:DebtInstrumentsAmountContributedToFairValueOfPlanAssets
2079 Deposits Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsAmountContributedToFairValueOfPlanAssets
2080 Others Concept (Monetary) As Of Debit ifrs-full:OtherAssetsAmountContributedToFairValueOfPlanAssets
2081 Fair value of plan assets Concept (Monetary) As Of Debit ifrs-full:PlanAssetsAtFairValue
2082 1156 - Disclosure - Employee Benefits - Amounts Recognized in Consolidated Statements of Comprehensive Income (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeeBenefitsAmountsRecognizedInConsolidatedStatementsOfComprehensiveIncome
2083 Disclosure of defined benefit plans [table] Table

*

*

ifrs-full:DisclosureOfDefinedBenefitPlansTable
2084 Statement of comprehensive income, profit or loss location [axis] Axis pkx:StatementOfComprehensiveIncomeProfitOrLossLocationAxis
2085 Statement of comprehensive income, profit or loss location [member] Member pkx:StatementOfComprehensiveIncomeProfitOrLossLocationMember
2086 Cost of sales [member] Member pkx:CostOfSalesMember
2087 Selling and administrative expenses [member] Member pkx:SellingAndAdministrativeExpensesMember
2088 Others [member] Member pkx:OtherExpensesMember
2089 Disclosure of defined benefit plans [line items] LineItems ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
2090 Current service costs Concept (Monetary) For Period Credit ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
2091 Net interest costs Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
2092 Amounts recognized in consolidated statements of comprehensive income Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans
2093 1157 - Disclosure - Employee Benefits - Amounts Recognized in Consolidated Statements of Comprehensive Income (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeeBenefitsAmountsRecognizedInConsolidatedStatementsOfComprehensiveIncomeParenthetical
2094 Implied Table Table

*

*

implied:Table
2095 Disclosure of defined benefit plans [abstract] Abstract ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
2096 Actual return on plan assets Concept (Monetary) For Period Debit ifrs-full:ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset
2097 1158 - Disclosure - Employee Benefits - Accumulated Actuarial Gains (Losses), Net of Tax Recognized in Other Comprehensive Income (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeeBenefitsAccumulatedActuarialGainsLossesNetOfTaxRecognizedInOtherComprehensiveIncome
2098 Implied Table Table

*

*

implied:Table
2099 Disclosure of defined benefit plans [abstract] Abstract ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
2100 Beginning Concept (Monetary) As Of Credit ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlans
2101 Current actuarial gains (losses) Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
2102 Ending Concept (Monetary) As Of Credit ifrs-full:ReserveOfRemeasurementsOfDefinedBenefitPlans
2103 1159 - Disclosure - Employee Benefits - Principal Actuarial Assumptions (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeeBenefitsPrincipalActuarialAssumptions
2104 Disclosure of defined benefit plans [table] Table

*

*

ifrs-full:DisclosureOfDefinedBenefitPlansTable
2105 Range [axis] Axis ifrs-full:RangeAxis
2106 Ranges [member] Member ifrs-full:RangesMember
2107 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
2108 Top of range [member] Member ifrs-full:TopOfRangeMember
2109 Disclosure of defined benefit plans [line items] LineItems ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
2110 Discount rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfDiscountRates
2111 Expected future increase in salaries Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
2112 1160 - Disclosure - Employee Benefits - Changes to Defined Benefit Obligation Due to Reasonably Possible Changes to one of the Relevant Actuarial Assumptions (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeeBenefitsChangesToDefinedBenefitObligationDueToReasonablyPossibleChangesToOneOfTheRelevantActuarialAssumptions
2113 Disclosure of sensitivity analysis for actuarial assumptions [table] Table

*

*

ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable
2114 Actuarial assumptions [axis] Axis ifrs-full:ActuarialAssumptionsAxis
2115 Actuarial assumptions [member] Member ifrs-full:ActuarialAssumptionsMember
2116 Discount rate [member] Member ifrs-full:ActuarialAssumptionOfDiscountRatesMember
2117 Expected future increase in salaries [member] Member ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreasesMember
2118 Disclosure of sensitivity analysis for actuarial assumptions [line items] LineItems ifrs-full:DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems
2119 Affect on defined benefit obligation due to reasonably possible 1% increase in actuarial assumption Concept (Monetary) As Of Credit ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption
2120 Percentage of reasonably possible 1% increase in actuarial assumption Concept (Percent) As Of ifrs-full:PercentageOfReasonablyPossibleIncreaseInActuarialAssumption
2121 Affect on defined benefit obligation due to reasonably possible 1% decrease in actuarial assumption Concept (Monetary) As Of Credit ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption
2122 Percentage of reasonably possible 1% decrease in actuarial assumption Concept (Percent) As Of ifrs-full:PercentageOfReasonablyPossibleDecreaseInActuarialAssumption
2123 1161 - Disclosure - Employee Benefits - Maturity of Expected Benefit Payments (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureEmployeeBenefitsMaturityOfExpectedBenefitPayments
2124 Disclosure of defined benefit plans [table] Table

*

*

ifrs-full:DisclosureOfDefinedBenefitPlansTable
2125 Maturity [axis] Axis ifrs-full:MaturityAxis
2126 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2127 Less than 1 year [member] Member ifrs-full:NotLaterThanOneYearMember
2128 1 year - 5 years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
2129 5 years - 10 years [member] Member ifrs-full:LaterThanFiveYearsAndNotLaterThanTenYearsMember
2130 10 years - 20 years [member] Member pkx:LaterThanTenYearsAndNotLaterThanTwentyYearsMember
2131 After 20 years [member] Member pkx:LaterThanTwentyYearsMember
2132 Disclosure of defined benefit plans [line items] LineItems ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
2133 Benefits paid Concept (Monetary) As Of Credit ifrs-full:ActuarialPresentValueOfPromisedRetirementBenefits
2134 1162 - Disclosure - Other Liabilities - Summary of Other Liabilities (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureOtherLiabilitiesSummaryOfOtherLiabilities
2135 Implied Table Table

*

*

implied:Table
2136 Miscellaneous liabilities [abstract] Abstract ifrs-full:MiscellaneousLiabilitiesAbstract
2137 Current Abstract ifrs-full:MiscellaneousCurrentLiabilitiesAbstract
2138 Due to customers for contract work Concept (Monetary) As Of Credit pkx:GrossAmountDueToCustomersForContractWorkAsLiabilities
2139 Advances received Concept (Monetary) As Of Credit ifrs-full:CurrentAdvances
2140 Unearned revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsCurrent
2141 Withholdings Concept (Monetary) As Of Credit pkx:WithholdingsCurrentNonfinancialLiabilities
2142 Firm commitment liability Concept (Monetary) As Of Credit pkx:FirmCommitmentLiability
2143 Others Concept (Monetary) As Of Credit pkx:OtherMiscellaneousLiabilitiesCurrent
2144 Other current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentNonfinancialLiabilities
2145 Non-current Abstract ifrs-full:MiscellaneousNoncurrentLiabilitiesAbstract
2146 Advances received Concept (Monetary) As Of Credit ifrs-full:NoncurrentAdvances
2147 Unearned revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsNoncurrent
2148 Others Concept (Monetary) As Of Credit pkx:OtherMiscellaneousLiabilitiesNoncurrent
2149 Other non-current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentNonfinancialLiabilities
2150 1163 - Disclosure - Financial Instruments - Summary of Carrying Amount and Fair Values of Financial Assets and Financial Liabilities by Fair value (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsSummaryOfCarryingAmountAndFairValuesOfFinancialAssetsAndFinancialLiabilitiesByFairValue
2151 Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [table] Table

*

*

pkx:DisclosuresOfFairValueHierarchyOfFinancialAssetsAndFinancialLiabilitiesTable
2152 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
2153 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
2154 Level 1 [member] Member ifrs-full:Level1OfFairValueHierarchyMember
2155 Level 2 [member] Member ifrs-full:Level2OfFairValueHierarchyMember
2156 Level 3 [member] Member ifrs-full:Level3OfFairValueHierarchyMember
2157 Measurement [axis] Axis ifrs-full:MeasurementAxis
2158 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
2159 Fair value [member] Member ifrs-full:AtFairValueMember
2160 Categories of financial liabilities [axis] Axis ifrs-full:CategoriesOfFinancialLiabilitiesAxis
2161 Financial liabilities, category [member] Member ifrs-full:FinancialLiabilitiesCategoryMember
2162 Financial liabilities at fair value through profit or loss [Member] Member ifrs-full:FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember
2163 Financial liabilities measured at amortized cost [member] Member ifrs-full:FinancialLiabilitiesAtAmortisedCostCategoryMember
2164 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
2165 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
2166 Financial assets at fair value through profit or loss [member] Member ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
2167 Loans and receivables [member] Member ifrs-full:LoansAndReceivablesCategoryMember
2168 Fair value through other comprehensive income [Member] Member ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember
2169 Amortized cost [Member] Member ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember
2170 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
2171 Financial instruments [Member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
2172 Assets measured at fair value [member] Member ifrs-full:FinancialAssetsAtFairValueMember
2173 Liabilities measured at fair value [member] Member ifrs-full:FinancialLiabilitiesAtFairValueMember
2174 Disclosures Of Fair Value Hierarchy Of Financial Assets And Financial Liabilities [Line items] LineItems pkx:DisclosuresOfFairValueHierarchyOfFinancialAssetsAndFinancialLiabilitiesLineItems
2175 Financial assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
2176 Financial assets held for trading Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInFinancialAssetsHeldForTrading
2177 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
2178 Fair value through profit or loss Derivative liabilities Concept (Monetary) As Of Debit pkx:FinancialInvestmentsNetOfDerivativeLiabilitiesAtFairValueThroughProfitOrLoss
2179 Derivative liabilities held for trading Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilities
2180 Trade accounts and notes receivable Concept (Monetary) As Of Debit pkx:TradeAccountsAndNotesReceivable
2181 Derivative hedging instruments(*2) Concept (Monetary) As Of Credit pkx:DerivativeInstrumentInHedgesLiabilitiesAtFairValue
2182 Derivative hedging instruments Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilitiesHeldForHedging
2183 Trade accounts and notes payable Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayablesToTradeSuppliers
2184 Trade accounts and notes payable Concept (Monetary) As Of Credit pkx:TradeAccountsAndNotesPayable
2185 Borrowings Concept (Monetary) As Of Credit ifrs-full:ShorttermBorrowings
2186 Borrowings Concept (Monetary) As Of Credit ifrs-full:Borrowings
2187 Financial guarantee liabilities Concept (Monetary) As Of Credit pkx:FinancialGuaranteeLiabilities
2188 Others Concept (Monetary) As Of Credit ifrs-full:OtherFinancialLiabilities
2189 Financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
2190 Derivatives assets held for trading Concept (Monetary) As Of Debit ifrs-full:DerivativeFinancialAssets
2191 Short-term financial instruments Concept (Monetary) As Of Debit pkx:ShorttermFinancialInstruments
2192 Derivative hedging instruments Concept (Monetary) As Of Debit ifrs-full:DerivativeFinancialAssetsHeldForHedging
2193 Debt securities Concept (Monetary) As Of Debit pkx:DebtSecuritiesAtFairValueThroughProfitAndLoss
2194 Available-for-sale financial assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAvailableforsale
2195 Other securities Concept (Monetary) As Of Debit pkx:FinancialInstrumentsReclassifiedFromOtherSecuritiesToFairValueThroughProfitOrLossCategory
2196 Held-to-maturity investments Concept (Monetary) As Of Debit ifrs-full:HeldtomaturityInvestments
2197 Other receivables Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
2198 Derivative hedging instruments(*2) Concept (Monetary) As Of Debit pkx:DerivativeInstrumentsAndHedgesAssets
2199 Deposit instruments Concept (Monetary) As Of Debit pkx:MarginDepositsOnDerivativeInstruments
2200 Equity securities Concept (Monetary) As Of Debit ifrs-full:FairValueOfInvestmentsInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncome
2201 Debt securities Concept (Monetary) As Of Debit pkx:DebtSecuritiesAtFairValueThroughOtherComprehensiveIncome
2202 Loans and other receivables Concept (Monetary) As Of Debit pkx:LoansAndOtherReceivables
2203 1164 - Disclosure - Financial Instruments - Value Measurement Method and Significant but not Observable Inputs for the Financial Assets Classified as Fair Value Hierarchy Level 3 (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsValueMeasurementMethodAndSignificantButNotObservableInputsForTheFinancialAssetsClassifiedAsFairValueHierarchyLevel3
2204 Disclosure of significant unobservable inputs used in fair value measurement of assets [table] Table

*

*

ifrs-full:DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsTable
2205 Measurement [axis] Axis ifrs-full:MeasurementAxis
2206 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
2207 Fair value [member] Member ifrs-full:AtFairValueMember
2208 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
2209 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
2210 Available-for-sale financial assets [member] Member ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
2211 Valuation techniques used in fair value measurement [axis] Axis ifrs-full:ValuationTechniquesUsedInFairValueMeasurementAxis
2212 Valuation techniques [member] Member ifrs-full:ValuationTechniquesMember
2213 Discounted cash flow [member] Member ifrs-full:DiscountedCashFlowMember
2214 PeerGroupUsage [member] Member pkx:PeergroupusageMember
2215 Asset value approach [member] Member pkx:AssetValueApproachMember
2216 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
2217 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
2218 Level 3 [member] Member ifrs-full:Level3OfFairValueHierarchyMember
2219 Range [axis] Axis ifrs-full:RangeAxis
2220 Ranges [member] Member ifrs-full:RangesMember
2221 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
2222 Top of range [member] Member ifrs-full:TopOfRangeMember
2223 Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] LineItems ifrs-full:DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsLineItems
2224 Available-for-sale financial assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAvailableforsale
2225 Growth rate Concept (Percent) For Period pkx:GrowthRateSignificantUnobservableInputsAssets
2226 Discount rate Concept (Percent) As Of pkx:DiscountRateSignificantUnobservableInputsAssets
2227 Price multiple Concept (Pure) For Period ifrs-full:RevenueMultipleSignificantUnobservableInputsAssets
2228 1165 - Disclosure - Financial Instruments - Sensitivity Analysis of Financial Assets and Financial Liabilities Classified as Level 3 of Fair Value Hierarchy (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsSensitivityAnalysisOfFinancialAssetsAndFinancialLiabilitiesClassifiedAsLevel3OfFairValueHierarchy
2229 Disclosure of significant unobservable inputs used in fair value measurement of assets [table] Table

*

*

ifrs-full:DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsTable
2230 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
2231 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
2232 Available-for-sale financial assets [member] Member ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
2233 Sensitivity analysis [Axis] Axis pkx:SensitivityAnalysisAxis
2234 Sensitivity analysis [Domain] Member pkx:SensitivityAnalysisDomain
2235 Fluctuation 0.5% of growth rate [member] Member pkx:Fluctuation0Point5PercentOfGrowthRateMember
2236 Fluctuation 0.5% of discount rate [member] Member pkx:Fluctuation0Point5PercentOfDiscountRateMember
2237 Disclosure of significant unobservable inputs used in fair value measurement of assets [line items] LineItems ifrs-full:DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsLineItems
2238 Favorable changes Concept (Monetary) For Period Debit ifrs-full:IncreaseInFairValueMeasurementDueToChangeInOneOrMoreUnobservableInputsToReflectReasonablyPossibleAlternativeAssumptionsAssets
2239 Unfavorable changes Concept (Monetary) For Period Credit ifrs-full:DecreaseInFairValueMeasurementDueToChangeInOneOrMoreUnobservableInputsToReflectReasonablyPossibleAlternativeAssumptionsAssets
2240 1166 - Disclosure - Financial Instruments - Changes in Fair Value of Financial Assets and Financial Liabilities Classified as Level 3 (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsChangesInFairValueOfFinancialAssetsAndFinancialLiabilitiesClassifiedAsLevel3
2241 Disclosure of fair value measurement of assets [table] Table

*

*

ifrs-full:DisclosureOfFairValueMeasurementOfAssetsTable
2242 Measurement [axis] Axis ifrs-full:MeasurementAxis
2243 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
2244 Fair value [member] Member ifrs-full:AtFairValueMember
2245 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
2246 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
2247 Level 3 [member] Member ifrs-full:Level3OfFairValueHierarchyMember
2248 Disclosure of fair value measurement of assets [line items] LineItems ifrs-full:DisclosureOfFairValueMeasurementOfAssetsLineItems
2249 Beginning Concept (Monetary) As Of Debit ifrs-full:Assets
2250 Acquisition and others Concept (Monetary) For Period Debit ifrs-full:PurchasesFairValueMeasurementAssets
2251 Gain (loss) on valuations of derivatives Concept (Monetary) For Period ifrs-full:GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssets
2252 Other comprehensive income (loss) Concept (Monetary) For Period ifrs-full:GainsLossesRecognisedInOtherComprehensiveIncomeFairValueMeasurementAssets
2253 Impairment Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossOnFinancialAssets
2254 Disposal and others Concept (Monetary) For Period Credit ifrs-full:SalesFairValueMeasurementAssets
2255 Ending Concept (Monetary) As Of Debit ifrs-full:Assets
2256 1167 - Disclosure - Financial Instruments - Finance Income and Costs by Category of Financial Instruments (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsFinanceIncomeAndCostsByCategoryOfFinancialInstruments
2257 Disclosure of detailed information about financial instruments [table] Table

*

*

ifrs-full:DisclosureOfFinancialInstrumentsTable
2258 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
2259 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
2260 Derivative financial assets [member] Member pkx:DerivativeFinancialAssetsMember
2261 Available-for-sale financial assets [member] Member ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
2262 Held-to-maturity financial assets [member] Member ifrs-full:HeldtomaturityInvestmentsCategoryMember
2263 Loans and receivables [member] Member ifrs-full:LoansAndReceivablesCategoryMember
2264 Financial assets held for trading [member] Member pkx:FinancialAssetsHeldForTradingMember
2265 Financial assets at fair value through profit or loss [member] Member ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
2266 Fair value through other comprehensive income [Member] Member ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember
2267 Amortized cost [Member] Member ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember
2268 Categories of financial liabilities [axis] Axis ifrs-full:CategoriesOfFinancialLiabilitiesAxis
2269 Financial liabilities, category [member] Member ifrs-full:FinancialLiabilitiesCategoryMember
2270 Derivative financial liabilities [member] Member pkx:DerivativeFinancialLiabilitiesMember
2271 Financial liabilities measured at amortized cost [member] Member ifrs-full:FinancialLiabilitiesAtAmortisedCostCategoryMember
2272 Disclosure of detailed information about financial instruments [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
2273 Interest income (expense) Concept (Monetary) For Period Credit ifrs-full:InterestRevenueExpense
2274 Gain and loss on valuation Concept (Monetary) For Period Credit pkx:GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssetsAndLiabilities
2275 Gain and loss on foreign currency Concept (Monetary) For Period Credit pkx:GainsLossesOnForeignCurrencyTransactionsAndTranslations
2276 Gain and loss on disposal Concept (Monetary) For Period Credit pkx:GainsLossesOnDisposalOfFinancialAssetsAndLiabilities
2277 Impairment loss Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossRecognisedInProfitOrLoss
2278 Others Concept (Monetary) For Period Credit ifrs-full:OtherFinanceIncomeCost
2279 Total Concept (Monetary) For Period Credit ifrs-full:FinanceIncomeCost
2280 Other comprehensive income (loss) Concept (Monetary) For Period Credit pkx:OtherComprehensiveIncomeNetOfTaxFinancialInstruments
2281 1168 - Disclosure - Financial Instruments - Maximum Exposure to Credit Risk (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsMaximumExposureToCreditRisk
2282 Disclosure of credit risk exposure [table] Table

*

*

ifrs-full:DisclosureOfCreditRiskExposureTable
2283 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
2284 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
2285 Cash and cash equivalents [member] Member pkx:CashAndCashEquivalentMember
2286 Derivative financial assets [member] Member pkx:DerivativeFinancialAssetsMember
2287 Short-term financial instrument [member] Member pkx:ShortTermFinancialInstrumentsMember
2288 Debt securities [member] Member ifrs-full:DebtSecuritiesMember
2289 Other securities [member] Member ifrs-full:OtherEquitySecuritiesMember
2290 Fair value through profit or loss [member] Member ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTradingCategoryMember
2291 Available for sale financial assets [member] Member pkx:AvailableForSaleFinancialAssets1Member
2292 Held to maturity investments [member] Member pkx:HeldToMaturityInvestmentsMember
2293 Other receivables [member] Member pkx:OtherReceivablesMember
2294 Trade accounts and notes receivables, net [member] Member pkx:TradeAccountsAndNotesReceivablesMember
2295 Deposit instruments [member] Member pkx:DepositInstrumentsMember
2296 Disclosure of credit risk exposure [line items] LineItems ifrs-full:DisclosureOfCreditRiskExposureLineItems
2297 Maximum exposure to credit risk Concept (Monetary) As Of ifrs-full:MaximumExposureToCreditRisk
2298 1169 - Disclosure - Financial Instruments - Additional Information (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsAdditionalInformation
2299 Disclosure of detailed information about financial instruments [table] Table

*

*

ifrs-full:DisclosureOfFinancialInstrumentsTable
2300 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
2301 Financial instruments [Member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
2302 Financial guarantees [member] Member ifrs-full:FinancialGuaranteeContractsMember
2303 Disclosure of detailed information about financial instruments [line items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
2304 Maximum exposure to credit risk related financial guarantees Concept (Monetary) As Of ifrs-full:MaximumExposureToCreditRisk
2305 1170 - Disclosure - Financial Instruments - Allowance for Doubtful Accounts (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsAllowanceForDoubtfulAccounts
2306 Disclosure of financial assets [table] Table

*

*

ifrs-full:DisclosureOfFinancialAssetsTable
2307 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
2308 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
2309 Trade accounts and notes receivables, net [member] Member pkx:TradeAccountsAndNotesReceivablesMember
2310 Other accounts receivable [member] Member pkx:OtherAccountsReceivableMember
2311 Loans [member] Member pkx:LoansAssetsMember
2312 Other assets [member] Member ifrs-full:OtherAssetsMember
2313 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
2314 Allowance for doubtful accounts Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
2315 1171 - Disclosure - Financial Instruments - Impairment Losses on Financial Assets (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsImpairmentLossesOnFinancialAssets
2316 Disclosure of financial assets [table] Table

*

*

ifrs-full:DisclosureOfFinancialAssetsTable
2317 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
2318 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
2319 Bad debt expenses [member] Member pkx:BadDebtExpensesMember
2320 Others [member] Member pkx:OtherFinancialAssetMember
2321 Available-for-sale financial assets [member] Member ifrs-full:FinancialAssetsAvailableforsaleCategoryMember
2322 Held-to-maturity financial assets [member] Member ifrs-full:HeldtomaturityInvestmentsCategoryMember
2323 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
2324 Impairment loss on financial assets Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossOnFinancialAssets
2325 Impairment loss on financial assets, net Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss
2326 Less: Recovery of impairment loss on financial assets Concept (Monetary) For Period Credit ifrs-full:ReversalOfImpairmentLossRecognisedInProfitOrLoss
2327 1172 - Disclosure - Financial Instruments - Aging and Impairment Losses of Trade Accounts and Notes Receivable and Other Receivables (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsAgingAndImpairmentLossesOfTradeAccountsAndNotesReceivableAndOtherReceivables
2328 Disclosure of financial assets that are either past due or impaired [table] Table

*

*

ifrs-full:DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedTable
2329 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
2330 Financial assets [Member] Member ifrs-full:FinancialAssetsMember
2331 Trade accounts and notes receivables, net [member] Member pkx:TradeAccountsAndNotesReceivablesMember
2332 Other receivables [member] Member pkx:OtherReceivablesMember
2333 Past due status [axis] Axis ifrs-full:PastDueStatusAxis
2334 Past due status [member] Member ifrs-full:PastDueStatusMember
2335 Not due [member] Member ifrs-full:CurrentMember
2336 Overdue less than 1 month [member] Member ifrs-full:NotLaterThanOneMonthMember
2337 1 month-3 months [member] Member ifrs-full:LaterThanOneMonthAndNotLaterThanThreeMonthsMember
2338 3 months-12 months [member] Member ifrs-full:LaterThanThreeMonthsAndNotLaterThanOneYearMember
2339 Over 12 months [member] Member ifrs-full:LaterThanOneYearMember
2340 Disclosure of financial assets that are either past due or impaired [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsThatAreEitherPastDueOrImpairedLineItems
2341 Financial assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
2342 Allowance for doubtful accounts Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
2343 1173 - Disclosure - Financial Instruments - Changes in Allowance for Doubtful Accounts (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsChangesInAllowanceForDoubtfulAccounts
2344 Implied Table Table

*

*

implied:Table
2345 Reconciliation of changes in allowance account for credit losses of financial assets [abstract] Abstract ifrs-full:ReconciliationOfChangesInAllowanceAccountForCreditLossesOfFinancialAssetsAbstract
2346 Beginning Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
2347 Initial application of IFRS No.9 Concept (Monetary) For Period pkx:AdditionalAllowanceRecognisedInProfitOrLossOnInitialApplicationAllowanceAccountForCreditLossesOfFinancialAssets
2348 Bad debt expenses Concept (Monetary) For Period ifrs-full:AdditionalAllowanceRecognisedInProfitOrLossAllowanceAccountForCreditLossesOfFinancialAssets
2349 Other bad debt expenses Concept (Monetary) For Period pkx:AdditionalOtherAllowanceRecognisedInProfitOrLossAllowanceAccountForCreditLossesOfFinancialAssets
2350 Others Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherChangesAllowanceAccountForCreditLossesOfFinancialAssets
2351 Ending Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
2352 1174 - Disclosure - Financial Instruments - Changes in Allowance for Doubtful Accounts (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsChangesInAllowanceForDoubtfulAccountsParenthetical
2353 Implied Table Table

*

*

implied:Table
2354 Reconciliation of changes in allowance account for credit losses of financial assets [abstract] Abstract ifrs-full:ReconciliationOfChangesInAllowanceAccountForCreditLossesOfFinancialAssetsAbstract
2355 Write-off of receivables Concept (Monetary) For Period Credit ifrs-full:DecreaseThroughWriteoffFinancialAssets
2356 1175 - Disclosure - Financial Instruments - Contractual Maturities for Non-derivative Financial Liabilities (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsContractualMaturitiesForNonderivativeFinancialLiabilities
2357 Disclosure of maturity analysis for non-derivative financial liabilities [table] Table

*

*

ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesTable
2358 Maturity [axis] Axis ifrs-full:MaturityAxis
2359 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2360 Less than 1 year [member] Member ifrs-full:NotLaterThanOneYearMember
2361 1 year - 5 years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
2362 After 5 years [member] Member ifrs-full:LaterThanFiveYearsMember
2363 Disclosure of maturity analysis for non-derivative financial liabilities [line items] LineItems ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems
2364 Trade accounts and notes payable, book value Concept (Monetary) As Of Credit pkx:TradeAccountsAndNotesPayable
2365 Borrowings, book value Concept (Monetary) As Of Credit ifrs-full:Borrowings
2366 Financial guarantee liabilities, book value Concept (Monetary) As Of Credit pkx:FinancialGuaranteeLiabilities
2367 Other financial liabilities, book value Concept (Monetary) As Of Credit ifrs-full:OtherFinancialLiabilities
2368 Non-derivative financial liabilities, book value Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesAtAmortisedCost
2369 Trade accounts and notes payable, contractual cash flow Concept (Monetary) As Of Credit pkx:TradeAccountsAndNotesPayableUndiscountedCashFlows
2370 Borrowings, contractual cash flow Concept (Monetary) As Of Credit ifrs-full:BankBorrowingsUndiscountedCashFlows
2371 Financial guarantee liabilities, contractual cash flow Concept (Monetary) As Of Credit pkx:FinancialGuaranteeLiabilitiesUndiscountedCashFlows
2372 Other financial liabilities, contractual cash flow Concept (Monetary) As Of Credit pkx:OtherFinancialLiabilitiesUndiscountedCashFlows
2373 Non-derivative financial liabilities, contractual cash flow Concept (Monetary) As Of Credit ifrs-full:NonderivativeFinancialLiabilitiesUndiscountedCashFlows
2374 1176 - Disclosure - Financial Instruments - Maturity Analysis of Derivative Financial Liabilities (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsMaturityAnalysisOfDerivativeFinancialLiabilities
2375 Disclosure of maturity analysis for derivative financial liabilities [table] Table

*

*

ifrs-full:DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesTable
2376 Maturity [axis] Axis ifrs-full:MaturityAxis
2377 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2378 Less than 1 year [member] Member ifrs-full:NotLaterThanOneYearMember
2379 1 year - 5 years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
2380 After 5 years [member] Member ifrs-full:LaterThanFiveYearsMember
2381 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
2382 Financial assets [Member] Member ifrs-full:FinancialAssetsMember
2383 Currency forward [member] Member pkx:CurrencyForwardContractMember
2384 Currency swap [member] Member ifrs-full:CurrencySwapContractMember
2385 Interest swap [member] Member ifrs-full:InterestRateSwapContractMember
2386 Others [member] Member pkx:OtherContractMember
2387 Disclosure of maturity analysis for derivative financial liabilities [line items] LineItems ifrs-full:DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesLineItems
2388 Derivative financial liabilities Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilities
2389 1177 - Disclosure - Financial Instruments - Exposure to Currency Risk (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsExposureToCurrencyRisk
2390 Disclosure of nature and extent of risks arising from financial instruments [table] Table

*

*

ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
2391 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
2392 Risks [member] Member ifrs-full:TypesOfRisksMember
2393 Currency risk [member] Member ifrs-full:CurrencyRiskMember
2394 Currency [axis] Axis srt:CurrencyAxis
2395 All Currencies [Domain] Member currency:AllCurrenciesDomain
2396 USD [member] Member currency:USD
2397 EUR [member] Member currency:EUR
2398 JPY [member] Member currency:JPY
2399 Others [member] Member pkx:OtherCurrencyMember
2400 Disclosure of nature and extent of risks arising from financial instruments [line items] LineItems ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
2401 Assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
2402 Liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
2403 1178 - Disclosure - Financial Instruments - Changes in Gain or Loss Due to a Hypothetically Strengthening or Weakening in Foreign Currencies (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsChangesInGainOrLossDueToAHypotheticallyStrengtheningOrWeakeningInForeignCurrencies
2404 Disclosure of detailed information about hedging instruments [table] Table

*

*

ifrs-full:DisclosureOfDetailedInformationAboutHedgingInstrumentsTable
2405 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
2406 Risks [member] Member ifrs-full:TypesOfRisksMember
2407 10% increase [member] Member pkx:TenPercentageStrengtheningInForeignExchangeRateMember
2408 10% decrease [member] Member pkx:TenPercentageWeakeningInForeignExchangeRateMember
2409 Currency [axis] Axis srt:CurrencyAxis
2410 All Currencies [Domain] Member currency:AllCurrenciesDomain
2411 USD [member] Member currency:USD
2412 EUR [member] Member currency:EUR
2413 JPY [member] Member currency:JPY
2414 Disclosure of detailed information about hedging instruments [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutHedgingInstrumentsLineItems
2415 Changes in gain or loss due to hypothetically strengthens or weakens of functional currency against foreign currencies other than functional currency Concept (Monetary) For Period Credit pkx:IncreaseDecreaseInProfitLossOnBasisOfStrengtheningOfMajorCurrenciesAgainstFunctionalCurrency
2416 Hypothetical percentage change in functional currency against foreign currencies other than functional currency Concept (Percent) For Period pkx:PercentageOfStrengtheningOfMajorCurrenciesAgainstFunctionalCurrency
2417 1179 - Disclosure - Financial Instruments - Carrying Amount of Interest-Bearing Financial Instruments (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsCarryingAmountOfInterestBearingFinancialInstruments
2418 Disclosure of nature and extent of risks arising from financial instruments [table] Table

*

*

ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
2419 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
2420 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
2421 Fixed rate [member] Member ifrs-full:FixedInterestRateMember
2422 Variable rate [member] Member ifrs-full:FloatingInterestRateMember
2423 Disclosure of nature and extent of risks arising from financial instruments [line items] LineItems ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
2424 Financial assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
2425 Financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
2426 Financial asset and liabilities Concept (Monetary) As Of Debit ifrs-full:NetAssetsLiabilities
2427 1180 - Disclosure - Financial Instruments - Changes in Interest Expense Due to an Increases or Decreases in Interest Rate (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinancialInstrumentsChangesInInterestExpenseDueToAnIncreasesOrDecreasesInInterestRate
2428 Disclosure of nature and extent of risks arising from financial instruments [table] Table

*

*

ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable
2429 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
2430 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
2431 1% increase in floating rates [member] Member pkx:OnePercentageStrengtheningOfFloatingInterestRateMember
2432 1% decrease in floating rates [member] Member pkx:OnePercentageWeakeningInFloatingInterestRateMember
2433 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
2434 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
2435 Variable rate [member] Member ifrs-full:FloatingInterestRateMember
2436 Disclosure of nature and extent of risks arising from financial instruments [line items] LineItems ifrs-full:DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
2437 Hypothetical percentage change in the floating rate Concept (Percent) As Of pkx:RiskExposureAssociatedWithInstrumentsSharingCharacteristicPercentageChangeInRisk
2438 Change in interest expense due to hypothetical increase or decrease in the floating rate Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInExposureToCreditRiskOnLoanCommitmentsAndFinancialGuaranteeContracts
2439 1181 - Disclosure - Share Capital and Capital Surplus - Summary of Share Capital (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureShareCapitalAndCapitalSurplusSummaryOfShareCapital
2440 Implied Table Table

*

*

implied:Table
2441 Disclosure of classes of share capital [abstract] Abstract ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
2442 Authorized shares Concept (Shares) As Of ifrs-full:NumberOfSharesAuthorised
2443 Par value Concept (Share) As Of ifrs-full:ParValuePerShare
2444 Issued shares(*1) Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
2445 Shared capital(*2) Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
2446 1182 - Disclosure - Share Capital and Capital Surplus - Summary of Share Capital (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureShareCapitalAndCapitalSurplusSummaryOfShareCapitalParenthetical
2447 Disclosure of classes of share capital [table] Table

*

*

ifrs-full:DisclosureOfClassesOfShareCapitalTable
2448 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
2449 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
2450 ADRs [member] Member pkx:AmericanDepositaryReceiptsMember
2451 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
2452 Total shares of ADRs outstanding Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
2453 Total shares of ADRs outstanding, equivalent common stock shares Concept (Shares) As Of pkx:NumberOfSharesRepresentedByADRs
2454 Difference between the ending balance of common stock and the par value of issued common stock due to retirement of treasury stocks Concept (Monetary) For Period Credit ifrs-full:CancellationOfTreasuryShares
2455 Retirement of treasury stock Concept (Shares) For Period pkx:CancellationOfTreasuryStockShares
2456 1183 - Disclosure - Share Capital and Capital Surplus - Changes in Issued Common Stock (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureShareCapitalAndCapitalSurplusChangesInIssuedCommonStock
2457 Implied Table Table

*

*

implied:Table
2458 Disclosure of classes of share capital [abstract] Abstract ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
2459 Shares issued beginning balance Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
2460 Disposal of treasury shares Concept (Shares) For Period pkx:DisposalOfSharesIssued
2461 Shares issued ending balance Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
2462 Treasury shares beginning balance Concept (Shares) As Of pkx:NumberOfTreasuryShares
2463 Disposal of treasury shares Concept (Shares) For Period pkx:SaleOrIssueOfTreasurySharesShares
2464 Treasury shares ending balance Concept (Shares) As Of pkx:NumberOfTreasuryShares
2465 Number of outstanding shares beginning balance Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
2466 Disposal of treasury shares Concept (Shares) For Period pkx:DisposalOfOutstandingShares
2467 Number of outstanding shares ending balance Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
2468 1184 - Disclosure - Share Capital and Capital Surplus - Summary of Capital Surplus (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureShareCapitalAndCapitalSurplusSummaryOfCapitalSurplus
2469 Implied Table Table

*

*

implied:Table
2470 Statement of changes in equity [abstract] Abstract ifrs-full:StatementOfChangesInEquityAbstract
2471 Share premium Concept (Monetary) As Of Credit ifrs-full:SharePremium
2472 Gain on disposal of treasury shares Concept (Monetary) As Of Credit pkx:GainOnDisposalOfTreasuryShare
2473 Other capital deficit Concept (Monetary) As Of Credit pkx:OtherCapitalSurplusDeficit
2474 Capital surplus Concept (Monetary) As Of Credit ifrs-full:AdditionalPaidinCapital
2475 1185 - Disclosure - Share Capital and Capital Surplus - Summary of Redeemable Convertible Preferred Shares (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureShareCapitalAndCapitalSurplusSummaryOfRedeemableConvertiblePreferredShares
2476 Disclosure Of Redeemable Convertible Preferred Shares [table] Table

*

*

pkx:DisclosureOfRedeemableConvertiblePreferredSharesTable
2477 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
2478 Equity [member] Member ifrs-full:EquityMember
2479 Redeemable convertible preferred stock [member] Member pkx:RedeemableConvertiblePreferredStockMember
2480 Disclosure Of Redeemable Convertible Preferred Shares [line items] LineItems pkx:DisclosureOfRedeemableConvertiblePreferredSharesLineItems
2481 Issue date Concept (Date) For Period pkx:PreferredSharesIssueDate
2482 Number of shares issued Concept (Shares) For Period pkx:NumberOfPreferredSharesIssued
2483 Price per share Concept (Share) For Period pkx:PreferredSharesIssuedPerShare
2484 Voting rights Concept (Text/String) For Period pkx:DescriptionOfVotingRights
2485 Dividend rights Concept (Text/String) For Period pkx:DescriptionOfVotingRightsOfTheHolders
2486 Dividend rate description Concept (Text/String) For Period pkx:DividendRateDescription
2487 Dividend rate Concept (Percent) As Of pkx:DividendRate
2488 Dividend rate issuance spread on comparative rate Concept (Text/String) For Period pkx:DividendRateIssuanceSpreadOnComparativeRate
2489 Details about redemption Concept (Text/String) For Period pkx:DescriptionOfRedemption
2490 Details about Conversion Concept (Text/String) For Period pkx:DescriptionOfConversionOfShares
2491 1186 - Disclosure - Hybrid Bonds - Summary of Hybrid Bonds (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureHybridBondsSummaryOfHybridBonds
2492 Disclosure of detailed information about borrowings [table] Table

*

*

ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
2493 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
2494 Book value [Member] Member ifrs-full:CarryingAmountMember
2495 Gross amount [member] Member ifrs-full:GrossCarryingAmountMember
2496 Issuance cost [member] Member pkx:IssuanceCostMember
2497 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
2498 Equity [member] Member ifrs-full:EquityMember
2499 Hybrid bond 1-1 [member] Member pkx:HybridBondOneToOneMember
2500 Hybrid bond 1-2 [member] Member pkx:HybridBondOneToTwoMember
2501 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
2502 Date of issue Concept (Text/String) For Period pkx:BorrowingsIssuanceDate
2503 Date of maturity Concept (Text/String) For Period ifrs-full:BorrowingsMaturity
2504 Interest rate (%) Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
2505 Hybrid bonds classified as equity Concept (Monetary) As Of Credit pkx:HybridBonds
2506 1187 - Disclosure - Hybrid Bonds - Summary of Hybrid Bonds (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureHybridBondsSummaryOfHybridBondsParenthetical
2507 Disclosure of detailed information about borrowings [table] Table

*

*

ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
2508 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
2509 Equity [member] Member ifrs-full:EquityMember
2510 Hybrid bond 1-2 [member] Member pkx:HybridBondOneToTwoMember
2511 Maturity [axis] Axis ifrs-full:MaturityAxis
2512 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2513 After 10 years [member] Member ifrs-full:LaterThanTenYearsMember
2514 After 10 years : Return on Government Bond [member] Member pkx:MoreThanTenYearsMember
2515 After 30 years [member] Member pkx:LaterThanThirtyYearsMember
2516 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
2517 Maturity date Concept (Text/String) For Period pkx:BorrowingsMaturityDescription
2518 Interest rate Concept (Monetary) As Of Credit pkx:BondsIssuedGross
2519 Interest rate adjustment Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
2520 Interest rate adjustment Concept (Percent) As Of ifrs-full:BorrowingsAdjustmentToInterestRateBasis
2521 Interest payments condition Concept (Text/String) For Period pkx:InterestPaymentsConditionDescription
2522 Others Concept (Text/String) For Period pkx:OtherDetailsOfHybridBondsDescription
2523 1188 - Disclosure - Hybrid Bonds - Additional Information (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureHybridBondsAdditionalInformation
2524 Disclosure of detailed information about borrowings [table] Table

*

*

ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
2525 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
2526 Equity [member] Member ifrs-full:EquityMember
2527 Hybrid bonds [member] Member pkx:HybridBondsMember
2528 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2529 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
2530 POSCO ENERGY CO., LTD. [member] Member pkx:POSCOENERGYCOLTDMember
2531 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
2532 Interest accumulated but not paid on hybrid bonds Concept (Monetary) As Of Credit ifrs-full:InterestPayable
2533 1189 - Disclosure - Hybrid Bonds - Hybrid Bonds Issued by POSCO ENERGY Co., Ltd. (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureHybridBondsHybridBondsIssuedByPOSCOENERGYCoLtd
2534 Disclosure of detailed information about borrowings [table] Table

*

*

ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
2535 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2536 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
2537 POSCO ENERGY CO., LTD. [member] Member pkx:POSCOENERGYCOLTDMember
2538 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
2539 Book value [Member] Member ifrs-full:CarryingAmountMember
2540 Gross amount [member] Member ifrs-full:GrossCarryingAmountMember
2541 Issuance cost [member] Member pkx:IssuanceCostMember
2542 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
2543 Equity [member] Member ifrs-full:EquityMember
2544 Hybrid bond 1-1 [member] Member pkx:HybridBondOneToOneMember
2545 Hybrid bond 1-2 [member] Member pkx:HybridBondOneToTwoMember
2546 Hybrid bond 1-3 [member] Member pkx:HybridBondOneToThreeMember
2547 Hybrid bond 1-4 [member] Member pkx:HybridBondOneToFourMember
2548 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
2549 Hybrid bond Concept (Monetary) As Of Credit pkx:HybridBonds
2550 Date of issue Concept (Text/String) For Period pkx:BorrowingsIssuanceDate
2551 Date of maturity Concept (Text/String) For Period ifrs-full:BorrowingsMaturity
2552 Interest rate (%) Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
2553 1190 - Disclosure - Hybrid Bonds - Hybrid Bonds Issued by POSCO ENERGY Co., Ltd. (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureHybridBondsHybridBondsIssuedByPOSCOENERGYCoLtdParenthetical
2554 Disclosure of detailed information about borrowings [table] Table

*

*

ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
2555 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
2556 Equity [member] Member ifrs-full:EquityMember
2557 Hybrid bond 1-4 [member] Member pkx:HybridBondOneToFourMember
2558 Maturity [axis] Axis ifrs-full:MaturityAxis
2559 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
2560 After 10 years : Return on Government Bond [member] Member pkx:MoreThanTenYearsMember
2561 After 10 years [member] Member ifrs-full:LaterThanTenYearsMember
2562 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2563 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
2564 POSCO ENERGY CO., LTD. [member] Member pkx:POSCOENERGYCOLTDMember
2565 Disclosure of detailed information about borrowings [line items] LineItems ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
2566 Maturity date Concept (Text/String) For Period pkx:BorrowingsMaturityDescription
2567 Interest rate Concept (Text/String) For Period pkx:BorrowingsInterestRateDescription
2568 Interest rate (%) Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
2569 Interest rate adjustment Concept (Percent) As Of ifrs-full:BorrowingsAdjustmentToInterestRateBasis
2570 Interest payments condition Concept (Text/String) For Period pkx:InterestPaymentsConditionDescription
2571 Others Concept (Text/String) For Period pkx:OtherDetailsOfHybridBondsDescription
2572 1191 - Disclosure - Reserves - Summary of Reserves (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureReservesSummaryOfReserves
2573 Implied Table Table

*

*

implied:Table
2574 Disclosure of reserves within equity [abstract] Abstract ifrs-full:DisclosureOfReservesWithinEquityAbstract
2575 Accumulated comprehensive loss of investments in associates and joint ventures Concept (Monetary) As Of Credit pkx:CumulativeUnrecognisedShareOfLossesOfAssociatesAndJointVentures
2576 Changes in fair value of equity investments at fair value through other comprehensive income Concept (Monetary) As Of Credit ifrs-full:ReserveOfGainsAndLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome
2577 Changes in the unrealized fair value of available-for-saleinvestments Concept (Monetary) As Of Credit ifrs-full:ReserveOfGainsAndLossesOnRemeasuringAvailableforsaleFinancialAssets
2578 Foreign currency translation differences Concept (Monetary) As Of Credit ifrs-full:ReserveOfExchangeDifferencesOnTranslation
2579 Gain or losses on valuation of derivatives Concept (Monetary) For Period Credit pkx:GainLossOnValuationOfDerivatives
2580 Others Concept (Monetary) As Of Credit pkx:OtherMiscellaneousReserves
2581 Reserves Concept (Monetary) As Of Credit ifrs-full:OtherReserves
2582 1192 - Disclosure - Reserves - Changes in the Unrealized Fair Value of Available-for-sale Investments (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureReservesChangesInTheUnrealizedFairValueOfAvailableforsaleInvestments
2583 Implied Table Table

*

*

implied:Table
2584 Disclosure of reserves within equity [abstract] Abstract ifrs-full:DisclosureOfReservesWithinEquityAbstract
2585 Changes in unrealized fair value of available-for-sale investments, beginning balance Concept (Monetary) As Of Credit ifrs-full:ReserveOfGainsAndLossesOnRemeasuringAvailableforsaleFinancialAssets
2586 Initial application of IFRS No. 9 Concept (Monetary) For Period Credit ifrs-full:FairValueGainLossThatWouldHaveBeenRecognisedInProfitOrLossIfFinancialAssetsHadNotBeenReclassifiedOutOfFairValueThroughProfitOrLossAndIntoFairValueThroughOtherComprehensiveIncomeInitialApplicationOfIFRS9
2587 Changes in unrealized fair value of equity investments Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnRemeasuringAvailableforsaleFinancialAssetsNetOfTax
2588 Reclassification upon disposal Concept (Monetary) For Period Debit ifrs-full:ReclassificationAdjustmentsOnAvailableforsaleFinancialAssetsNetOfTax
2589 Impairment of available-for-sale investments Concept (Monetary) For Period Debit pkx:ImpairmentOfAvailableforsaleFinancialAssets
2590 Others Concept (Monetary) For Period Credit pkx:OtherChangesInUnrealizedFairValueOfAvailableforsaleFinancialAssets
2591 Changes in unrealized fair value of available-for-sale investments, ending balance Concept (Monetary) As Of Credit ifrs-full:ReserveOfGainsAndLossesOnRemeasuringAvailableforsaleFinancialAssets
2592 1193 - Disclosure - Treasury Shares - Changes in Treasury Shares (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureTreasurySharesChangesInTreasuryShares
2593 Statement of changes in equity [table] Table

*

*

ifrs-full:StatementOfChangesInEquityTable
2594 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
2595 Equity [member] Member ifrs-full:EquityMember
2596 Treasury shares [member] Member ifrs-full:TreasurySharesMember
2597 Statement of changes in equity [line items] LineItems ifrs-full:StatementOfChangesInEquityLineItems
2598 Number of shares, Beginning Concept (Shares) As Of pkx:NumberOfTreasuryShares
2599 Number of shares, Disposal of treasury shares Concept (Shares) For Period pkx:SaleOrIssueOfTreasurySharesShares
2600 Number of shares, Ending Concept (Shares) As Of pkx:NumberOfTreasuryShares
2601 Amount, Beginning Concept (Monetary) As Of Debit ifrs-full:TreasuryShares
2602 Amount, Disposal of treasury shares Concept (Monetary) For Period Credit ifrs-full:SaleOrIssueOfTreasuryShares
2603 Amount, Ending Concept (Monetary) As Of Debit ifrs-full:TreasuryShares
2604 1194 - Disclosure - Revenue - Summary of Revenue Disaggregated by Types of Revenue and Timing of Revenue Recognition (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureRevenueSummaryOfRevenueDisaggregatedByTypesOfRevenueAndTimingOfRevenueRecognition
2605 Disclosure of disaggregation of revenue from contracts with customers [table] Table

*

*

ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable
2606 Segments [axis] Axis ifrs-full:SegmentsAxis
2607 Segments [member] Member ifrs-full:SegmentsMember
2608 Steel [member] Member pkx:SteelMember
2609 Trading [member] Member pkx:TradingMember
2610 Construction [member] Member pkx:ConstructionMember
2611 Other [member] Member pkx:OtherMember
2612 Timing of transfer of goods or services [axis] Axis ifrs-full:TimingOfTransferOfGoodsOrServicesAxis
2613 Timing of transfer of goods or services [member] Member ifrs-full:TimingOfTransferOfGoodsOrServicesMember
2614 Revenue recognized at a point in time [member] Member ifrs-full:GoodsOrServicesTransferredAtPointInTimeMember
2615 Revenue recognized over time [member] Member ifrs-full:GoodsOrServicesTransferredOverTimeMember
2616 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
2617 Products and services [member] Member ifrs-full:ProductsAndServicesMember
2618 Revenue from sales of goods [member] Member pkx:SalesOfGoodsMember
2619 Revenue from services [member] Member pkx:ServicesMember
2620 Revenue from construction contract [member] Member pkx:ConstructionContractMember
2621 Others [member] Member pkx:OthersServicesMember
2622 Disclosure of disaggregation of revenue from contracts with customers [line items] LineItems ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems
2623 Revenue Concept (Monetary) For Period Credit ifrs-full:RevenueFromContractsWithCustomers
2624 1195 - Disclosure - Revenue - Summary of Contract Assets and Liabilities From Contracts With Customers (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureRevenueSummaryOfContractAssetsAndLiabilitiesFromContractsWithCustomers
2625 Implied Table Table

*

*

implied:Table
2626 Disclosure of Receivables, customer finance, contract assets and contract liabilities [abstract] Abstract pkx:DisclosureOfreceivablesCustomerFinanceContractAssetsAndContractLiabilitiesAbstract
2627 Account receivables Concept (Monetary) As Of Debit ifrs-full:ReceivablesFromContractsWithCustomers
2628 Due from customers for contract work Concept (Monetary) As Of Debit pkx:AmountDueFromCustomersForContractWorkAsContractAsset
2629 Advance received Concept (Monetary) As Of Credit pkx:AdvanceReceivedCurrent
2630 Due to customers for contract work Concept (Monetary) As Of Credit pkx:AmountDueToCustomersForContractWorkAsContractLiabilities
2631 Unearned revenue Concept (Monetary) As Of Credit pkx:UnearnedRevenue
2632 1196 - Disclosure - Revenue - Contract Balances - Summary of In-Progress Contracts (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureRevenueContractBalancesSummaryOfInProgressContracts
2633 Implied Table Table

*

*

implied:Table
2634 Disclosure of disaggregation of revenue from contracts with customers [abstract] Abstract ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersAbstract
2635 Accumulated cost Concept (Monetary) For Period Debit pkx:AccumulatedCost
2636 Accumulated contract profit Concept (Monetary) For Period Credit pkx:AccumulatedContractProfit
2637 Accumulated contract loss Concept (Monetary) For Period Debit pkx:AccumulatedContractLoss
2638 Accumulated contract revenue Concept (Monetary) For Period Credit pkx:AccumulatedContractRevenue
2639 1197 - Disclosure - Revenue - Contract Details - Summary of Due From Customers for Contract Work and Due to Customers for Contract Work (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureRevenueContractDetailsSummaryOfDueFromCustomersForContractWorkAndDueToCustomersForContractWork
2640 Implied Table Table

*

*

implied:Table
2641 Disclosure of disaggregation of revenue from contracts with customers [abstract] Abstract ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersAbstract
2642 Unbilled due from customers for contract work Concept (Monetary) As Of Debit pkx:GrossAmountDueFromCustomersForContractWorkAsAssets
2643 Due to customers for contract work Concept (Monetary) As Of Debit pkx:DueToCustomersForContractWork
2644 Construction contract in progress Concept (Monetary) As Of Debit pkx:GrossAmountDueFromToCustomersForContractWork
2645 1198 - Disclosure - Revenue - Summary of Changes in Estimated Total Contract Costs and Impact on Profit or Loss (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureRevenueSummaryOfChangesInEstimatedTotalContractCostsAndImpactOnProfitOrLoss
2646 Implied Table Table

*

*

implied:Table
2647 Disclosure of disaggregation of revenue from contracts with customers [abstract] Abstract ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersAbstract
2648 Changes in estimated total contract costs Concept (Monetary) For Period Credit pkx:IncreaseDecreaseInEstimatedContractCosts
2649 Changes in profit before income taxes of construction contract : Abstract pkx:IncreaseDecreaseInProfitBeforeIncomeTaxesOfConstructionContractAbstract
2650 - Current period Concept (Monetary) For Period Credit pkx:IncreaseDecreaseInProfitBeforeIncomeTaxesOfConstructionContractCurrentPeriod
2651 - Future periods Concept (Monetary) For Period Credit pkx:IncreaseDecreaseInProfitBeforeIncomeTaxesOfConstructionContractFuturePeriods
2652 1199 - Disclosure - Revenue - Summary of Significant Assumptions Including Uncertainty of Estimate of Total Contract Costs (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureRevenueSummaryOfSignificantAssumptionsIncludingUncertaintyOfEstimateOfTotalContractCosts
2653 Disclosure of disaggregation of revenue from contracts with customers [table] Table

*

*

ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable
2654 Categories of assets recognised from costs to obtain or fulfil contracts with customers [axis] Axis ifrs-full:CategoriesOfAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersAxis
2655 Categories of assets recognised from costs to obtain or fulfil contracts with customers [member] Member ifrs-full:CategoriesOfAssetsRecognisedFromCostsToObtainOrFulfilContractsWithCustomersMember
2656 Material cost [member] Member pkx:MaterialCostMember
2657 Labor cost [member] Member pkx:LaborCostMember
2658 Outsourcing cost [member] Member pkx:OutsourcingCostMember
2659 Disclosure of disaggregation of revenue from contracts with customers [line items] LineItems ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems
2660 Method of significant assumption Concept (Text/String) For Period pkx:DescriptionOfMethodOfSignificantAssumptionOfContractCosts
2661 1200 - Disclosure - Selling and Administrative Expenses - Summary of Other Administrative Expenses (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureSellingAndAdministrativeExpensesSummaryOfOtherAdministrativeExpenses
2662 Statement of comprehensive income [Table] Table

*

*

srt:CondensedStatementOfComprehensiveIncomeTable
2663 Statement of comprehensive income, profit or loss location [axis] Axis pkx:StatementOfComprehensiveIncomeProfitOrLossLocationAxis
2664 Statement of comprehensive income, profit or loss location [member] Member pkx:StatementOfComprehensiveIncomeProfitOrLossLocationMember
2665 Administrative expenses [member] Member pkx:AdministrativeExpensesMember
2666 Statement of comprehensive income [Line Items] LineItems srt:CondensedStatementOfIncomeCaptionsLineItems
2667 Wages and salaries Concept (Monetary) For Period Debit ifrs-full:WagesAndSalaries
2668 Expenses related to post-employment benefits Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedBenefitPlans
2669 Other employee benefits Concept (Monetary) For Period Debit ifrs-full:OtherEmployeeExpense
2670 Travel Concept (Monetary) For Period Debit ifrs-full:TravelExpense
2671 Depreciation Concept (Monetary) For Period Debit ifrs-full:DepreciationExpense
2672 Amortization Concept (Monetary) For Period Debit ifrs-full:AmortisationExpense
2673 Communication Concept (Monetary) For Period Debit ifrs-full:CommunicationExpense
2674 Electricity expenses Concept (Monetary) For Period Debit pkx:ElectricityExpenses
2675 Taxes and public dues Concept (Monetary) For Period Debit ifrs-full:TaxExpenseOtherThanIncomeTaxExpense
2676 Rental Concept (Monetary) For Period Debit ifrs-full:RentalExpense
2677 Repairs Concept (Monetary) For Period Debit ifrs-full:RepairsAndMaintenanceExpense
2678 Entertainment Concept (Monetary) For Period Debit pkx:EntertainmentExpense
2679 Advertising Concept (Monetary) For Period Debit ifrs-full:MediaProductionExpense
2680 Research & development Concept (Monetary) For Period Debit ifrs-full:ResearchAndDevelopmentExpense
2681 Service fees Concept (Monetary) For Period Debit ifrs-full:ProfessionalFeesExpense
2682 Vehicles maintenance Concept (Monetary) For Period Debit ifrs-full:TransportationExpense
2683 Industry association fee Concept (Monetary) For Period Debit pkx:IndustryAssociationFee
2684 Conference Concept (Monetary) For Period Debit pkx:ConferenceExpenses
2685 Increase to provisions Concept (Monetary) For Period Debit pkx:IncreaseToProvisions
2686 Others Concept (Monetary) For Period Debit pkx:OtherAdministrativeExpenses
2687 Total administrative expenses Concept (Monetary) For Period Debit ifrs-full:AdministrativeExpense
2688 1201 - Disclosure - Selling and Administrative Expenses - Summary of Selling Expenses (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureSellingAndAdministrativeExpensesSummaryOfSellingExpenses
2689 Statement of comprehensive income [Table] Table

*

*

srt:CondensedStatementOfComprehensiveIncomeTable
2690 Statement of comprehensive income, profit or loss location [axis] Axis pkx:StatementOfComprehensiveIncomeProfitOrLossLocationAxis
2691 Statement of comprehensive income, profit or loss location [member] Member pkx:StatementOfComprehensiveIncomeProfitOrLossLocationMember
2692 Selling expenses [member] Member pkx:SellingExpensesMember
2693 Statement of comprehensive income [Line Items] LineItems srt:CondensedStatementOfIncomeCaptionsLineItems
2694 Freight and custody expenses Concept (Monetary) For Period Debit ifrs-full:TransportationExpense
2695 Operating expenses for distribution center Concept (Monetary) For Period Debit ifrs-full:DistributionCosts
2696 Sales commissions Concept (Monetary) For Period Debit ifrs-full:FeeAndCommissionExpense
2697 Sales advertising Concept (Monetary) For Period Debit pkx:SalesAdvertisingExpense
2698 Sales promotion Concept (Monetary) For Period Debit pkx:SalesPromotionExpenses
2699 Sample Concept (Monetary) For Period Debit pkx:SampleExpenses
2700 Sales insurance premium Concept (Monetary) For Period Debit ifrs-full:InsuranceExpense
2701 Contract cost Concept (Monetary) For Period Debit pkx:ContractCost
2702 Others Concept (Monetary) For Period Debit pkx:OtherSellingExpenses
2703 Total Selling expenses Concept (Monetary) For Period Debit pkx:SellingExpenses
2704 1202 - Disclosure - Research and Development Expenditures Recognized as Expenses - Summary of Research and Development Expenditures Recognized as Expenses (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureResearchAndDevelopmentExpendituresRecognizedAsExpensesSummaryOfResearchAndDevelopmentExpendituresRecognizedAsExpenses
2705 Statement of comprehensive income [Table] Table

*

*

srt:CondensedStatementOfComprehensiveIncomeTable
2706 Statement of comprehensive income, profit or loss location [axis] Axis pkx:StatementOfComprehensiveIncomeProfitOrLossLocationAxis
2707 Statement of comprehensive income, profit or loss location [member] Member pkx:StatementOfComprehensiveIncomeProfitOrLossLocationMember
2708 Administrative expenses [member] Member pkx:AdministrativeExpensesMember
2709 Cost of sales [member] Member pkx:CostOfSalesMember
2710 Statement of comprehensive income [Line Items] LineItems srt:CondensedStatementOfIncomeCaptionsLineItems
2711 Research and development expenditures recognized as expenses Concept (Monetary) For Period Debit ifrs-full:ResearchAndDevelopmentExpense
2712 1203 - Disclosure - Other Operating Income and Expenses - Details of Other Operating Income and Expenses (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureOtherOperatingIncomeAndExpensesDetailsOfOtherOperatingIncomeAndExpenses
2713 Implied Table Table

*

*

implied:Table
2714 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
2715 Other operating income Abstract pkx:OtherOperatingIncomeAbstract
2716 Gain on disposals of assets held for sale Concept (Monetary) For Period Credit pkx:GainOnDisposalsOfAssetsHeldForSale
2717 Gain on disposals of investment in subsidiaries, associates and joint ventures Concept (Monetary) For Period Credit pkx:GainOnDisposalOfInvestmentsAccountedForUsingEquityMethod
2718 Gain on disposals of property, plant and equipment Concept (Monetary) For Period Credit ifrs-full:GainsOnDisposalsOfPropertyPlantAndEquipment
2719 Gain on disposals of intangible assets Concept (Monetary) For Period Credit pkx:GainOnDisposalOfIntangibleAssets
2720 Gain on valuation of firm commitment Concept (Monetary) For Period Credit pkx:ProfitOnValuationOfFirmCommitment
2721 Gain on insurance proceeds Concept (Monetary) For Period Credit pkx:GainsOnInsuranceProceeds
2722 Others Concept (Monetary) For Period Credit pkx:OtherMiscellaneousOtherOperatingIncome
2723 Other operating income Concept (Monetary) For Period Credit ifrs-full:MiscellaneousOtherOperatingIncome
2724 Other operating expenses Abstract pkx:OtherOperatingExpensesAbstract
2725 Impairment loss on assets held for sale Concept (Monetary) For Period Debit pkx:ImpairmentLossOnAssetsHeldForSale
2726 Loss on disposals of investments in subsidiaries, associates and joint ventures Concept (Monetary) For Period Debit pkx:LossOnDisposalOfInvestmentsAccountedForUsingEquityMethod
2727 Loss on disposals of property, plant and equipment Concept (Monetary) For Period Debit ifrs-full:LossesOnDisposalsOfPropertyPlantAndEquipment
2728 Impairment loss on property, plant and equipment Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
2729 Impairment loss on investment property Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossInvestmentProperty
2730 Loss on disposals of investment property Concept (Monetary) For Period Debit ifrs-full:LossesOnDisposalsOfInvestmentProperties
2731 Impairment loss on intangible assets Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill
2732 Increase to provisions Concept (Monetary) For Period Debit pkx:IncreaseToProvisionsInOtherOperatingExpenses
2733 Loss on valuation of firm commitment Concept (Monetary) For Period Debit pkx:LossOnValuationOfFirmCommitment
2734 Donations Concept (Monetary) For Period Debit ifrs-full:DonationsAndSubsidiesExpense
2735 Idle tangible asset expenses Concept (Monetary) For Period Debit pkx:IdleTangibleAssetExpenses
2736 Others Concept (Monetary) For Period Debit pkx:OtherMiscellaneousOtherOperatingExpense
2737 Other operating expenses Concept (Monetary) For Period Debit ifrs-full:MiscellaneousOtherOperatingExpense
2738 1204 - Disclosure - Other Operating Income and Expenses - Details of Other Operating Income and Expenses (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureOtherOperatingIncomeAndExpensesDetailsOfOtherOperatingIncomeAndExpensesParenthetical
2739 Implied Table Table

*

*

implied:Table
2740 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
2741 Tax refund upon successful appeal to tax Concept (Monetary) For Period Credit pkx:TaxRefundWithoutCorporateTax
2742 Refund of VAT and other taxes Concept (Monetary) For Period Credit pkx:TaxesPaidRefundOtherThanIncomeTax
2743 Additional taxes imposed about value added tax Concept (Monetary) As Of Debit ifrs-full:ValueAddedTaxReceivables
2744 1205 - Disclosure - Finance Income and Costs - Details of Finance Income and Costs (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinanceIncomeAndCostsDetailsOfFinanceIncomeAndCosts
2745 Implied Table Table

*

*

implied:Table
2746 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
2747 Finance income Abstract pkx:FinanceIncomeAbstract
2748 Interest income Concept (Monetary) For Period Credit ifrs-full:RevenueFromInterest
2749 Dividend income Concept (Monetary) For Period Credit ifrs-full:RevenueFromDividends
2750 Gain on foreign currency transactions Concept (Monetary) For Period Credit ifrs-full:NetForeignExchangeGain
2751 Gain on foreign currency translations Concept (Monetary) For Period Credit pkx:GainOnForeignCurrencyTranslations
2752 Gain on derivatives transactions Concept (Monetary) For Period Credit pkx:GainOnDerivativesTransactions
2753 Gain on valuations of derivatives Concept (Monetary) For Period Credit ifrs-full:GainsOnChangeInFairValueOfDerivatives
2754 Gain on disposals of available-for-sale financial assets Concept (Monetary) For Period Credit pkx:GainOnDisposalOfAvailableforsaleFinancialAssets
2755 Gain on valuations of financial assets at fair value through profit or loss Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss
2756 Others Concept (Monetary) For Period Credit ifrs-full:OtherFinanceIncome
2757 Finance income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
2758 Finance costs Abstract pkx:FinanceCostsAbstract
2759 Interest expenses Concept (Monetary) For Period Debit ifrs-full:InterestExpense
2760 Loss on foreign currency transactions Concept (Monetary) For Period Debit ifrs-full:NetForeignExchangeLoss
2761 Loss on foreign currency translations Concept (Monetary) For Period Debit pkx:LossOnForeignCurrencyTranslations
2762 Loss on derivatives transactions Concept (Monetary) For Period Debit pkx:LossOnDerivativesTransactions
2763 Loss on valuation of derivatives Concept (Monetary) For Period Debit ifrs-full:LossesOnChangeInFairValueOfDerivatives
2764 Impairment loss on available-for-sale financial assets Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossOnFinancialAssets
2765 Loss on valuations of financial assets at fair value through profit or loss Concept (Monetary) For Period Debit pkx:LossOnFinancialAssetsAtFairValueThroughProfitLoss
2766 Others Concept (Monetary) For Period Debit ifrs-full:OtherFinanceCost
2767 Finance costs Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
2768 1206 - Disclosure - Finance Income and Costs - Details of Finance Income and Costs (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureFinanceIncomeAndCostsDetailsOfFinanceIncomeAndCostsParenthetical
2769 Implied Table Table

*

*

implied:Table
2770 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
2771 Interest income Concept (Monetary) For Period Credit pkx:RevenueFromInterestFinancialInstruments
2772 1207 - Disclosure - Expenses by Nature - Summary of Expenses by Nature (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureExpensesByNatureSummaryOfExpensesByNature
2773 Implied Table Table

*

*

implied:Table
2774 Analysis of income and expense [abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
2775 Raw material used, changes in inventories and others Concept (Monetary) For Period Debit pkx:RawMaterialUsedChangesInInventoriesAndOthers
2776 Employee benefits expenses Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
2777 Outsourced processing cost Concept (Monetary) For Period Debit pkx:OutsourcedProcessingCost
2778 Electricity expenses Concept (Monetary) For Period Debit pkx:ElectricityExpenses
2779 Depreciation Concept (Monetary) For Period Debit ifrs-full:DepreciationExpense
2780 Amortization Concept (Monetary) For Period Debit ifrs-full:AmortisationExpense
2781 Freight and custody expenses Concept (Monetary) For Period Debit ifrs-full:TransportationExpense
2782 Sales commissions Concept (Monetary) For Period Debit ifrs-full:FeeAndCommissionExpense
2783 Loss on disposal of property, plant and equipment Concept (Monetary) For Period Debit ifrs-full:LossesOnDisposalsOfPropertyPlantAndEquipment
2784 Impairment loss on property, plant and equipment Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
2785 Impairment loss on goodwill and intangible assets Concept (Monetary) For Period ifrs-full:ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsAndGoodwill
2786 Donations Concept (Monetary) For Period Debit ifrs-full:DonationsAndSubsidiesExpense
2787 Other expenses Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByNature
2788 Expenses by nature Concept (Monetary) For Period Debit ifrs-full:ExpenseByNature
2789 Wages and salaries Concept (Monetary) For Period Debit ifrs-full:WagesAndSalaries
2790 Expenses related to post-employment benefits Concept (Monetary) For Period Debit pkx:PostEmploymentBenefitExpense
2791 Employee benefits expenses Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
2792 1208 - Disclosure - Income Taxes - Summary of Income Tax Expense (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureIncomeTaxesSummaryOfIncomeTaxExpense
2793 Implied Table Table

*

*

implied:Table
2794 Major components of tax expense (income) [abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
2795 Current income taxes Concept (Monetary) For Period Debit ifrs-full:CurrentTaxExpenseIncome
2796 Deferred income tax due to temporary differences Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences
2797 Items recorded directly in equity Concept (Monetary) For Period Debit ifrs-full:CurrentAndDeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity
2798 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
2799 1209 - Disclosure - Income Taxes - Income Tax Credit (Charged) Directly to Equity (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureIncomeTaxesIncomeTaxCreditChargedDirectlyToEquity
2800 Implied Table Table

*

*

implied:Table
2801 Current and deferred tax relating to items charged or credited directly to equity [abstract] Abstract ifrs-full:CurrentAndDeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquityAbstract
2802 Net changes in fair value of equity investments at fair value through other comprehensive income Concept (Monetary) For Period Debit pkx:IncomeTaxRelatingToNetChangesInFairValueOfEquityInvestmentsAtFairValueThroughOtherComprehensiveIncome
2803 Remeasurements of defined benefit plans Concept (Monetary) For Period Debit pkx:IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlans
2804 Gain on sale of treasury shares Concept (Monetary) For Period Debit pkx:IncomeTaxRelatingToLossGainOnSaleOfTreasuryShares
2805 Others Concept (Monetary) For Period Debit pkx:OtherTaxRelatingToItemsCreditedChargedDirectlyToEquity
2806 Income taxes credited (charged) directly to equity Concept (Monetary) For Period Debit ifrs-full:CurrentAndDeferredTaxRelatingToItemsChargedOrCreditedDirectlyToEquity
2807 1210 - Disclosure - Income Taxes - Additional Information (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureIncomeTaxesAdditionalInformation
2808 Implied Table Table

*

*

implied:Table
2809 Major components of tax expense (income) [abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
2810 POSCO's statutory rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
2811 Deductible temporary differences Concept (Monetary) As Of ifrs-full:DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
2812 Taxable temporary differences, not recognized Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssetWhenUtilisationIsDependentOnFutureTaxableProfitsInExcessOfProfitsFromReversalOfTaxableTemporaryDifferencesAndEntityHasSufferedLossInJurisdictionToWhichDeferredTaxAssetRelates
2813 1211 - Disclosure - Income Taxes - Reconciliation Of Calculated Income Tax Expense Based on the Statutory Rate to Actual Amount of Taxes Recorded (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureIncomeTaxesReconciliationOfCalculatedIncomeTaxExpenseBasedOnTheStatutoryRateToActualAmountOfTaxesRecorded
2814 Implied Table Table

*

*

implied:Table
2815 Reconciliation of accounting profit multiplied by applicable tax rates [abstract] Abstract ifrs-full:ReconciliationOfAccountingProfitMultipliedByApplicableTaxRatesAbstract
2816 Profit before income tax expense Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
2817 Income tax expense computed at statutory rate Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
2818 Adjustments: Abstract pkx:AdjustmentToReconcileCalculatedTaxExpenseToActualTaxExpenseAbstract
2819 Tax credits Concept (Monetary) For Period Debit pkx:TaxEffectOfTaxCredits
2820 Additional Income tax expense for prior years (Over provisions from prior years) Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForCurrentTaxOfPriorPeriod
2821 Tax effect from tax audit Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfTaxLosses
2822 Investment in subsidiaries, associates and joint ventures Concept (Monetary) For Period Debit pkx:TaxEffectOfInvestmentInSubsidiariesAssociatesAndJointVentures
2823 Tax effects due to permanent differences Concept (Monetary) For Period Debit pkx:TaxEffectDueToPermanentDifferences
2824 Effect of tax rate change Concept (Monetary) For Period Debit ifrs-full:TaxEffectFromChangeInTaxRate
2825 Others Concept (Monetary) For Period Debit ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
2826 Adjustments Concept (Monetary) For Period Debit pkx:AdjustmentsToReconcileCalculatedTaxExpenseToActualTaxExpense
2827 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
2828 Effective tax rate Concept (Percent) For Period ifrs-full:AverageEffectiveTaxRate
2829 1212 - Disclosure - Income Taxes - Reconciliation Of Calculated Income Tax Expense Based on the Statutory Rate to Actual Amount of Taxes Recorded (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureIncomeTaxesReconciliationOfCalculatedIncomeTaxExpenseBasedOnTheStatutoryRateToActualAmountOfTaxesRecordedParenthetical
2830 Disclosure of Income Taxes [Table] Table

*

*

pkx:DisclosureOfIncomeTaxesTable
2831 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
2832 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
2833 Changes in tax rates or tax laws enacted or announced [member] Member ifrs-full:ChangesInTaxRatesOrTaxLawsEnactedOrAnnouncedMember
2834 Disclosure of Income Taxes [Line Items] LineItems pkx:DisclosureOfIncomeTaxesLineItems
2835 Statutory rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
2836 Excess of taxable income enacted Concept (Monetary) For Period Debit pkx:IncreaseInTaxableIncomeDueToChangeInTaxRate
2837 1213 - Disclosure - Income Taxes - Movements in Deferred Tax Assets (Liabilities) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureIncomeTaxesMovementsInDeferredTaxAssetsLiabilities
2838 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
2839 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
2840 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
2841 Allowance for credit losses [member] Member ifrs-full:AllowanceForCreditLossesMember
2842 Reserve for technology developments [member] Member pkx:ReserveForTechnologyDevelopmentMember
2843 Property, plant and equipment depreciation [member] Member pkx:PropertyPlantAndEquipmentDepreciationMember
2844 Share of profit or loss of equity-accounted investees [member] Member pkx:ShareOfProfitOrLossOfEquityAccountedInvesteesMember
2845 Allowance for inventories valuation [member] Member pkx:AllowanceForInventoriesValuationMember
2846 Property, plant and equipment revaluation [member] Member pkx:PropertyPlantAndEquipmentRevaluationMember
2847 Prepaid expenses [member] Member pkx:PrepaidExpensesMember
2848 Property, plant and equipment impairment loss [member] Member pkx:PropertyPlantAndEquipmentImpairmentLossMember
2849 Gain or loss on foreign currency [member] Member ifrs-full:UnrealisedForeignExchangeGainsLossesMember
2850 Defined benefit obligations [member] Member ifrs-full:PresentValueOfDefinedBenefitObligationMember
2851 Plan assets [member] Member ifrs-full:PlanAssetsMember
2852 Provision for construction losses [member] Member pkx:ProvisionForConstructionLossesMember
2853 Provision for construction warranty [member] Member pkx:ProvisionForConstructionWarrantyMember
2854 Accrued income [member] Member pkx:AccruedIncomeMember
2855 Other [member] Member ifrs-full:OtherTemporaryDifferencesMember
2856 Temporary differences [member] Member ifrs-full:TemporaryDifferenceMember
2857 Changes in fair value of investments in equity instruments measured at fair value through other comprehensive income [member] Member pkx:ChangesInFairValueOfInvestmentsInEquityInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember
2858 Other deferred income taxes recognized directly to equity [member] Member pkx:DeferredIncomeTaxesRecognizedDirectlyToEquityOtherMember
2859 Deferred income taxes recognized directly to equity [member] Member pkx:DeferredIncomeTaxesRecognizedDirectlyToEquityMember
2860 Tax credit carryforward and others [member] Member ifrs-full:UnusedTaxCreditsMember
2861 Investments in subsidiaries, associates and joint ventures [member] Member pkx:InvestmentsInSubsidiariesAssociatesAndJointVenturesMember
2862 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
2863 Beginning Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
2864 Inc. (Dec.) Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInDeferredTaxLiabilityAsset
2865 Ending Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
2866 1214 - Disclosure - Income Taxes - Summary of Deferred Tax Assets And Liabilities (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureIncomeTaxesSummaryOfDeferredTaxAssetsAndLiabilities
2867 Disclosure of temporary difference, unused tax losses and unused tax credits [table] Table

*

*

ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable
2868 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
2869 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
2870 Allowance for credit losses [member] Member ifrs-full:AllowanceForCreditLossesMember
2871 Reserve for technology developments [member] Member pkx:ReserveForTechnologyDevelopmentMember
2872 Property, plant and equipment depreciation [member] Member pkx:PropertyPlantAndEquipmentDepreciationMember
2873 Share of profit or loss of equity-accounted investees [member] Member pkx:ShareOfProfitOrLossOfEquityAccountedInvesteesMember
2874 Allowance for inventories valuation [member] Member pkx:AllowanceForInventoriesValuationMember
2875 Property, plant and equipment revaluation [member] Member pkx:PropertyPlantAndEquipmentRevaluationMember
2876 Prepaid expenses [member] Member pkx:PrepaidExpensesMember
2877 Property, plant and equipment impairment loss [member] Member pkx:PropertyPlantAndEquipmentImpairmentLossMember
2878 Gain or loss on foreign currency [member] Member ifrs-full:UnrealisedForeignExchangeGainsLossesMember
2879 Defined benefit obligations [member] Member ifrs-full:PresentValueOfDefinedBenefitObligationMember
2880 Plan assets [member] Member ifrs-full:PlanAssetsMember
2881 Provision for construction losses [member] Member pkx:ProvisionForConstructionLossesMember
2882 Provision for construction warranty [member] Member pkx:ProvisionForConstructionWarrantyMember
2883 Accrued income [member] Member pkx:AccruedIncomeMember
2884 Other [member] Member ifrs-full:OtherTemporaryDifferencesMember
2885 Temporary differences [member] Member ifrs-full:TemporaryDifferenceMember
2886 Changes in fair value of investments in equity instruments measured at fair value through other comprehensive income [member] Member pkx:ChangesInFairValueOfInvestmentsInEquityInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember
2887 Other deferred income taxes recognized directly to equity [member] Member pkx:DeferredIncomeTaxesRecognizedDirectlyToEquityOtherMember
2888 Deferred income taxes recognized directly to equity [member] Member pkx:DeferredIncomeTaxesRecognizedDirectlyToEquityMember
2889 Tax credit carryforward and others [member] Member ifrs-full:UnusedTaxCreditsMember
2890 Investments in subsidiaries, associates and joint ventures [member] Member pkx:InvestmentsInSubsidiariesAssociatesAndJointVenturesMember
2891 Disclosure of temporary difference, unused tax losses and unused tax credits [line items] LineItems ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems
2892 Assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
2893 Liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
2894 Net Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
2895 1215 - Disclosure - Earnings Per Share - Basic And Diluted Earnings Per Share (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureEarningsPerShareBasicAndDilutedEarningsPerShare
2896 Implied Table Table

*

*

implied:Table
2897 Earnings per share [abstract] Abstract ifrs-full:EarningsPerShareAbstract
2898 Profit attribute to controlling interest Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
2899 Interests of hybrid bonds Concept (Monetary) For Period Debit pkx:InterestsOfHybridBonds
2900 Weighted-average number of common shares outstanding Concept (Shares) For Period ifrs-full:WeightedAverageShares
2901 Basic and diluted earnings per share Concept (Share) For Period ifrs-full:BasicAndDilutedEarningsLossPerShare
2902 Total number of common shares issued Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
2903 Weighted-average number of treasury shares Concept (Shares) For Period pkx:WeightedAverageNumberOfTreasuryShares
2904 Weighted-average number of common shares outstanding Concept (Shares) For Period ifrs-full:WeightedAverageShares
2905 1216 - Disclosure - Related Party Transactions - Significant Transactions Between the Controlling Company and Related Parties (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureRelatedPartyTransactionsSignificantTransactionsBetweenTheControllingCompanyAndRelatedParties
2906 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2907 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2908 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2909 Posco [member] Member ifrs-full:ParentMember
2910 Associates and joint ventures [Axis] Axis pkx:AssociatesJointVentureAxis
2911 Associates and joint ventures [Domain] Member pkx:AssociatesJointVentureDomain
2912 SeAH Changwon Integrated Special Steel [member] Member pkx:SeAHChangwonIntegratedSpecialSteelMember
2913 POSCO PLANTEC Co., Ltd. [member] Member pkx:POSCOPLANTECCoLtdMember
2914 SNNC [member] Member pkx:SNNCMember
2915 POSCO-SAMSUNG-Slovakia Processing Center [member] Member pkx:POSCOSAMSUNGSlovakiaProcessingCenterMember
2916 KOBRASCO [member] Member pkx:KOBRASCOMember
2917 Other associates and joint ventures [member] Member pkx:OtherAssociatesAndJointVenturesMember
2918 Associates and joint ventures [member] Member pkx:AssociatesAndJointVenturesMember
2919 Roy Hill Holdings Pty Ltd. [member] Member pkx:RoyHillHoldingsPtyLtdMember
2920 CSP - Compania Siderurgica do Pecem [member] Member pkx:CspCompaniaSiderugicaDoPecemMember
2921 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2922 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
2923 POSCO ENGINEERING & CONSTRUCTION CO., LTD. [member] Member pkx:POSCOENGINEERINGAndCONSTRUCTIONCOLTDMember
2924 POSCO Processing & Service [member] Member pkx:POSCOProcessingAndServiceMember
2925 POSCO COATED & COLOR STEEL Co., Ltd. [member] Member pkx:POSCOCOATEDAndCOLORSTEELCoLtdMember
2926 POSCO ICT [member] Member pkx:POSCOICTMember
2927 eNtoB Corporation [member] Member pkx:eNtoBCorporationMember
2928 POSCO CHEMTECH [member] Member pkx:POSCOCHEMTECHMember
2929 POSCO ENERGY CO., LTD. [member] Member pkx:POSCOENERGYCOLTDMember
2930 POSCO TMC Co., Ltd. [member] Member pkx:POSCOTMCCoLtdMember
2931 POSCO AST [member] Member pkx:POSCOASTMember
2932 POSCO DAEWOO Corporation [member] Member pkx:POSCODAEWOOCorporationMember
2933 POSCO Thainox Public Company Limited [member] Member pkx:POSCOThainoxPublicCompanyLimitedMember
2934 POSCO America Corporation [member] Member pkx:POSCOAmericaCorporationMember
2935 POSCO Canada Ltd. [member] Member pkx:POSCOCanadaLtdMember
2936 POSCO Asia Co., Ltd. [member] Member pkx:POSCOAsiaCoLtdMember
2937 Qingdao Pohang Stainless Steel Co., Ltd. [member] Member pkx:QingdaoPohangStainlessSteelCoLtdMember
2938 POSCO JAPAN Co., Ltd. [member] Member pkx:POSCOJAPANCoLtdMember
2939 POSCO-VIETNAM Co., Ltd. [member] Member pkx:POSCOVIETNAMCoLtdMember
2940 POSCO MEXICO S.A. DE C.V. [member] Member pkx:POSCOMEXICOSADECVMember
2941 POSCO Maharashtra Steel Private Limited [member] Member pkx:POSCOMaharashtraSteelPrivateLimitedMember
2942 POSCO(Suzhou) Automotive Processing Center Co., Ltd. [member] Member pkx:POSCOSuzhouAutomotiveProcessingCenterCoLtdMember
2943 Others [member] Member pkx:OtherSubsidiariesMember
2944 Subsidiaries [member] Member ifrs-full:SubsidiariesMember
2945 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2946 Sales Concept (Monetary) For Period Credit ifrs-full:RevenueFromSaleOfGoodsRelatedPartyTransactions
2947 Other sales Concept (Monetary) For Period Credit pkx:OtherRevenueRelatedPartyTransactions
2948 Purchase of material Concept (Monetary) For Period Debit ifrs-full:PurchasesOfGoodsRelatedPartyTransactions
2949 Purchase of fixed assets Concept (Monetary) For Period Debit ifrs-full:PurchasesOfPropertyAndOtherAssetsRelatedPartyTransactions
2950 Outsourced processing cost Concept (Monetary) For Period Debit pkx:OutsourcedProcessingCostRelatedPartyTransactions
2951 Others Concept (Monetary) For Period Credit pkx:OtherPurchasesRelatedPartyTransactions
2952 1217 - Disclosure - Related Party Transactions - Significant Transactions Between the Controlling Company and Related Parties (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureRelatedPartyTransactionsSignificantTransactionsBetweenTheControllingCompanyAndRelatedPartiesParenthetical
2953 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2954 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
2955 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
2956 Loans [member] Member pkx:LoansAssetsMember
2957 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2958 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2959 Posco [member] Member ifrs-full:ParentMember
2960 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2961 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
2962 Suncheon Eco Trans Co., Ltd [member] Member pkx:SuncheonEcoTransCoLtdMember
2963 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2964 Loans to related parties during the year Concept (Monetary) For Period Credit ifrs-full:CashAdvancesAndLoansMadeToRelatedParties
2965 Loans recorded as allowance for doubtful accounts Concept (Monetary) As Of Credit ifrs-full:AllowanceAccountForCreditLossesOfFinancialAssets
2966 1218 - Disclosure - Related Party Transactions - Related Account Balances of Significant Transactions Between the Controlling Company and Related Parties (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureRelatedPartyTransactionsRelatedAccountBalancesOfSignificantTransactionsBetweenTheControllingCompanyAndRelatedParties
2967 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
2968 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
2969 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
2970 Posco [member] Member ifrs-full:ParentMember
2971 Associates and joint ventures [Axis] Axis pkx:AssociatesJointVentureAxis
2972 Associates and joint ventures [Domain] Member pkx:AssociatesJointVentureDomain
2973 POSCO PLANTEC Co., Ltd. [member] Member pkx:POSCOPLANTECCoLtdMember
2974 SNNC [member] Member pkx:SNNCMember
2975 Roy Hill Holdings Pty Ltd. [member] Member pkx:RoyHillHoldingsPtyLtdMember
2976 Other associates and joint ventures [member] Member pkx:OtherAssociatesAndJointVenturesMember
2977 Associates and joint ventures [member] Member pkx:AssociatesAndJointVenturesMember
2978 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
2979 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
2980 POSCO ENGINEERING & CONSTRUCTION CO., LTD. [member] Member pkx:POSCOENGINEERINGAndCONSTRUCTIONCOLTDMember
2981 POSCO COATED & COLOR STEEL Co., Ltd. [member] Member pkx:POSCOCOATEDAndCOLORSTEELCoLtdMember
2982 POSCO ICT [member] Member pkx:POSCOICTMember
2983 eNtoB Corporation [member] Member pkx:eNtoBCorporationMember
2984 POSCO CHEMTECH [member] Member pkx:POSCOCHEMTECHMember
2985 POSCO ENERGY CO., LTD. [member] Member pkx:POSCOENERGYCOLTDMember
2986 POSCO DAEWOO Corporation [member] Member pkx:POSCODAEWOOCorporationMember
2987 POSCO Thainox Public Company Limited [member] Member pkx:POSCOThainoxPublicCompanyLimitedMember
2988 POSCO America Corporation [member] Member pkx:POSCOAmericaCorporationMember
2989 POSCO Asia Co., Ltd. [member] Member pkx:POSCOAsiaCoLtdMember
2990 Qingdao Pohang Stainless Steel Co., Ltd. [member] Member pkx:QingdaoPohangStainlessSteelCoLtdMember
2991 POSCO MEXICO S.A. DE C.V. [member] Member pkx:POSCOMEXICOSADECVMember
2992 POSCO Maharashtra Steel Private Limited [member] Member pkx:POSCOMaharashtraSteelPrivateLimitedMember
2993 Others [member] Member pkx:OtherSubsidiariesMember
2994 Subsidiaries [member] Member ifrs-full:SubsidiariesMember
2995 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
2996 Trade accounts and notes receivable Concept (Monetary) As Of Debit pkx:TradeAccountsAndNotesReceivableToRelatedParties
2997 Other receivables Concept (Monetary) As Of Debit pkx:OtherReceivableRelatedPartyTransaction
2998 Total receivables Concept (Monetary) As Of Debit ifrs-full:AmountsReceivableRelatedPartyTransactions
2999 Trade accounts and notes payable Concept (Monetary) As Of Credit pkx:TradeAccountsAndNotesPayableToRelatedParties
3000 Accounts payable Concept (Monetary) As Of Credit pkx:AccountsPayableRelatedPartyTransactions
3001 Other payables Concept (Monetary) As Of Credit pkx:OtherPayablesToRelatedPartyTransaction
3002 Total payables Concept (Monetary) As Of Credit ifrs-full:AmountsPayableRelatedPartyTransactions
3003 1219 - Disclosure - Related Party Transactions - Significant Transactions Between the Company, Excluding the Controlling Company, and Related Companies (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureRelatedPartyTransactionsSignificantTransactionsBetweenTheCompanyExcludingTheControllingCompanyAndRelatedCompanies
3004 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
3005 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
3006 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
3007 Company, excluding the controlling company [member] Member pkx:CompanyExcludingParentMember
3008 Associates and joint ventures [Axis] Axis pkx:AssociatesJointVentureAxis
3009 Associates and joint ventures [Domain] Member pkx:AssociatesJointVentureDomain
3010 POSCO PLANTEC Co., Ltd. [member] Member pkx:POSCOPLANTECCoLtdMember
3011 New Songdo International City Development, LLC [member] Member pkx:NewSongdoInternationalCityDevelopmentLLCMember
3012 SNNC [member] Member pkx:SNNCMember
3013 Chuncheon Energy Co., Ltd. [member] Member pkx:ChuncheonEnergyCoLtdMember
3014 Noeul Green Energy [member] Member pkx:NoeulGreenEnergyMember
3015 VSC POSCO Steel Corporation [member] Member pkx:VSCPOSCOSteelCorporationMember
3016 USS-POSCO Industries [member] Member pkx:USSPOSCOIndustriesMember
3017 CSP - Compania Siderurgica do Pecem [member] Member pkx:CSPCompaniaSiderurgicadoPecemMember
3018 Zhongyue POSCO (Qinhuangdao) Tinplate Industrial Co., Ltd [member] Member pkx:ZhongyuePOSCOQinhuangdaoTinplateIndustrialCoLtdMember
3019 LLP POSUK Titanium [member] Member pkx:LLPPOSUKTitaniumMember
3020 BX STEEL POSCO Cold Rolled Sheet Co., Ltd. [member] Member pkx:BXSTEELPOSCOColdRolledSheetCoLtdMember
3021 POS-SEAH STEEL WIRE (TIANJIN) CO., Ltd [member] Member pkx:POSSEAHSTEELWIRETIANJINCOLtdMember
3022 PT. batutua tembaga raya [member] Member pkx:PTBatutuaTembagaRayaMember
3023 POSCO SeAH Steel Wire(Nantong) Co., Ltd. [member] Member pkx:POSCOSeAHSteelWireNantongCoLtdMember
3024 Zhangjiagang Pohang Refractories Co., Ltd. [member] Member pkx:ZhangjiagangPohangRefractoriesCoLtdMember
3025 Sebang Steel [member] Member pkx:SebangSteelMember
3026 SHANGHAI WAIGAOQIAO FREE TRADE ZONE LANSHENG DAEWOO IN'L TRADING CO., LTD. [member] Member pkx:SHANGHAIWAIGAOQIAOFREETRADEZONELANSHENGDAEWOOINLTRADINGCOLTDMember
3027 DMSA/AMSA [member] Member pkx:DMSAAMSAMember
3028 South-East Asia Gas Pipeline Company Ltd. [member] Member pkx:SouthEastAsiaGasPipelineCompanyLtdMember
3029 Other associates and joint ventures [member] Member pkx:OtherAssociatesAndJointVenturesMember
3030 Associates and joint ventures [member] Member pkx:AssociatesAndJointVenturesMember
3031 SeAH Changwon Integrated Special Steel [member] Member pkx:SeAHChangwonIntegratedSpecialSteelMember
3032 Posco e&c Songdo International Building [member] Member pkx:PoscoeAndcSongdoInternationalBuildingMember
3033 Incheon-Gimpo Expressway Co., Ltd. [member] Member pkx:IncheonGimpoExpresswayCoLtdMember
3034 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
3035 Sales Concept (Monetary) For Period Credit ifrs-full:RevenueFromSaleOfGoodsRelatedPartyTransactions
3036 Other sales Concept (Monetary) For Period Credit pkx:OtherRevenueRelatedPartyTransactions
3037 Purchase of material Concept (Monetary) For Period Debit ifrs-full:PurchasesOfGoodsRelatedPartyTransactions
3038 Other purchases Concept (Monetary) For Period Credit pkx:OtherPurchasesRelatedPartyTransactions
3039 1220 - Disclosure - Related Party Transactions - Related Account Balances of Significant Transactions Between the Company, Excluding the Controlling Company, and Related Parties (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureRelatedPartyTransactionsRelatedAccountBalancesOfSignificantTransactionsBetweenTheCompanyExcludingTheControllingCompanyAndRelatedParties
3040 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
3041 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
3042 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
3043 Company, excluding the controlling company [member] Member pkx:CompanyExcludingParentMember
3044 Associates and joint ventures [Axis] Axis pkx:AssociatesJointVentureAxis
3045 Associates and joint ventures [Domain] Member pkx:AssociatesJointVentureDomain
3046 POSCO PLANTEC Co., Ltd. [member] Member pkx:POSCOPLANTECCoLtdMember
3047 New Songdo International City Development, LLC [member] Member pkx:NewSongdoInternationalCityDevelopmentLLCMember
3048 Chuncheon Energy Co., Ltd. [member] Member pkx:ChuncheonEnergyCoLtdMember
3049 Nickel mining company SAS [member] Member pkx:NickelMiningCompanySASMember
3050 CSP - Compania Siderurgica do Pecem [member] Member pkx:CSPCompaniaSiderurgicadoPecemMember
3051 Zhongyue POSCO (Qinhuangdao) Tinplate Industrial Co., Ltd [member] Member pkx:ZhongyuePOSCOQinhuangdaoTinplateIndustrialCoLtdMember
3052 PT. batutua tembaga raya [member] Member pkx:PTBatutuaTembagaRayaMember
3053 POSCO SeAH Steel Wire(Nantong) Co., Ltd. [member] Member pkx:POSCOSeAHSteelWireNantongCoLtdMember
3054 DMSA/AMSA [member] Member pkx:DMSAAMSAMember
3055 South-East Asia Gas Pipeline Company Ltd. [member] Member pkx:SouthEastAsiaGasPipelineCompanyLtdMember
3056 Other associates and joint ventures [member] Member pkx:OtherAssociatesAndJointVenturesMember
3057 Associates and joint ventures [member] Member pkx:AssociatesAndJointVenturesMember
3058 POSCO Power Co Ltd [member] Member pkx:POSCOPowerCoLtdMember
3059 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
3060 Trade accounts and notes receivable Concept (Monetary) As Of Debit pkx:TradeAccountsAndNotesReceivableToRelatedParties
3061 Loan Concept (Monetary) As Of Debit pkx:LoansReceivableRelatedPartyTransactions
3062 Other receivables Concept (Monetary) As Of Debit pkx:OtherReceivableRelatedPartyTransaction
3063 Total receivables Concept (Monetary) As Of Debit ifrs-full:AmountsReceivableRelatedPartyTransactions
3064 Trade accounts and notes payable Concept (Monetary) As Of Credit pkx:TradeAccountsAndNotesPayableToRelatedParties
3065 Other payables Concept (Monetary) As Of Credit pkx:OtherPayablesToRelatedPartyTransaction
3066 Total payables Concept (Monetary) As Of Credit ifrs-full:AmountsPayableRelatedPartyTransactions
3067 1221 - Disclosure - Related Party Transactions - Related Account Balances of Significant Transactions Between the Company, Excluding the Controlling Company, and Related Parties (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureRelatedPartyTransactionsRelatedAccountBalancesOfSignificantTransactionsBetweenTheCompanyExcludingTheControllingCompanyAndRelatedPartiesParenthetical
3068 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
3069 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
3070 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
3071 Company, excluding the controlling company [member] Member pkx:CompanyExcludingParentMember
3072 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
3073 Bad-debt allowance for receivables Concept (Monetary) As Of Credit ifrs-full:ProvisionsForDoubtfulDebtsRelatedToOutstandingBalancesOfRelatedPartyTransaction
3074 1222 - Disclosure - Related Party Transactions - Significant Financial Transactions Between the Company, Excluding the Controlling Company, and Related Parties (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureRelatedPartyTransactionsSignificantFinancialTransactionsBetweenTheCompanyExcludingTheControllingCompanyAndRelatedParties
3075 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
3076 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
3077 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
3078 Company, excluding the controlling company [member] Member pkx:CompanyExcludingParentMember
3079 Associates and joint ventures [Axis] Axis pkx:AssociatesJointVentureAxis
3080 Associates and joint ventures [Domain] Member pkx:AssociatesJointVentureDomain
3081 METAPOLIS Co.,Ltd [member] Member pkx:METAPOLISCoLtdMember
3082 New Songdo International City Development, LLC [member] Member pkx:NewSongdoInternationalCityDevelopmentLLCMember
3083 Gale International Korea, LLC [member] Member pkx:GaleInternationalKoreaLLCMember
3084 DMSA/AMSA [member] Member pkx:DMSAAMSAMember
3085 South-East Asia Gas Pipeline Company Ltd. [member] Member pkx:SouthEastAsiaGasPipelineCompanyLtdMember
3086 PT. batutua tembaga raya [member] Member pkx:PTBatutuaTembagaRayaMember
3087 PT. Tanggamus Electric Power [member] Member pkx:PTTanggamusElectricPowerMember
3088 PT. wampu electric power [member] Member pkx:PTWampuElectricPowerMember
3089 PT. POSMI Steel Indonesia [member] Member pkx:PTPOSMISteelIndonesiaMember
3090 Nickel mining company SAS [member] Member pkx:NickelMiningCompanySASMember
3091 AN KHANH NEW CITY DEVELOPMENT J.V. CO., LTD. [member] Member pkx:ANKHANHNEWCITYDEVELOPMENTJVCOLTDMember
3092 Zhongyue POSCO (Qinhuangdao) Tinplate Industrial Co., Ltd [member] Member pkx:ZhongyuePOSCOQinhuangdaoTinplateIndustrialCoLtdMember
3093 KRAKATAU POS-CHEM DONG-SUH CHEMICAL [member] Member pkx:KRAKATAUPOSCHEMDONGSUHCHEMICALMember
3094 Hamparan Mulya [member] Member pkx:HamparanMulyaMember
3095 POS-SEAH STEEL WIRE (TIANJIN) CO., Ltd [member] Member pkx:POSSEAHSTEELWIRETIANJINCOLtdMember
3096 POSCO SeAH Steel Wire(Nantong) Co., Ltd. [member] Member pkx:POSCOSeAHSteelWireNantongCoLtdMember
3097 POS-SeAH Steel Wire (Thailand) Co., Ltd. [member] Member pkx:POSSeAHSteelWireThailandCoLtdMember
3098 AMCI (WA) PTY LTD [member] Member pkx:AMCIWAPTYLTDMember
3099 POSCO(Yantai)Automotive Processing Center Co., Ltd. [member] Member pkx:POSCOYantaiAutomotiveProcessingCenterCoLtdMember
3100 POS-AUSTEM WUHAN AUTOMOTIVE CO.,LTD [member] Member pkx:POSAUSTEMWUHANAUTOMOTIVECOLTDMember
3101 SAMHWAN VINA CO., LTD [member] Member pkx:SamhwanVinaCoLtdMember
3102 Associates and joint ventures [member] Member pkx:AssociatesAndJointVenturesMember
3103 UITrans LRT Co., Ltd. [member] Member pkx:UITransLRTCoLtdMember
3104 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
3105 Beginning Concept (Monetary) As Of Debit pkx:LoansReceivableRelatedPartyTransactions
3106 Lend Concept (Monetary) For Period Credit ifrs-full:CashAdvancesAndLoansMadeToRelatedParties
3107 Collect Concept (Monetary) For Period Debit ifrs-full:CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToRelatedParties
3108 Others Concept (Monetary) For Period Debit pkx:OtherChangesToLoansReceivableFromRelatedPartyTransactions
3109 Ending Concept (Monetary) As Of Debit pkx:LoansReceivableRelatedPartyTransactions
3110 1223 - Disclosure - Related Party Transactions - Significant Financial Transactions Between the Company, Excluding the Controlling Company, and Related Parties (Parenthetical) (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureRelatedPartyTransactionsSignificantFinancialTransactionsBetweenTheCompanyExcludingTheControllingCompanyAndRelatedPartiesParenthetical
3111 Disclosure of transactions between related parties [table] Table

*

*

ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
3112 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
3113 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
3114 Company, excluding the controlling company [member] Member pkx:CompanyExcludingParentMember
3115 Associates and joint ventures [Axis] Axis pkx:AssociatesJointVentureAxis
3116 Associates and joint ventures [Domain] Member pkx:AssociatesJointVentureDomain
3117 DMSA/AMSA [member] Member pkx:DMSAAMSAMember
3118 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
3119 Loans converted to shares of DMSA/AMSA Concept (Monetary) For Period Debit pkx:ConvertibleLoansConvertedToSharesAmount
3120 1224 - Disclosure - Related Party Transactions - Details of Compensation to Key Management Officers (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureRelatedPartyTransactionsDetailsOfCompensationToKeyManagementOfficers
3121 Implied Table Table

*

*

implied:Table
3122 Related party transactions [abstract] Abstract ifrs-full:RelatedPartyTransactionsAbstract
3123 Short-term benefits Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
3124 Long-term benefits Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationOtherLongtermBenefits
3125 Retirement benefits Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationPostemploymentBenefits
3126 Compensation to key management Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
3127 1225 - Disclosure - Commitments and Contingencies - Contingent Liabilities on Outstanding Guarantees (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureCommitmentsAndContingenciesContingentLiabilitiesOnOutstandingGuarantees
3128 Disclosure of contingent liabilities [table] Table

*

*

ifrs-full:DisclosureOfContingentLiabilitiesTable
3129 Classes of contingent liabilities [axis] Axis ifrs-full:ClassesOfContingentLiabilitiesAxis
3130 Contingent liabilities [member] Member ifrs-full:ContingentLiabilitiesMember
3131 Contingent liabilities on outstanding guarantees [member] Member ifrs-full:ContingentLiabilityForGuaranteesMember
3132 Top of range [member] Member ifrs-full:TopOfRangeMember
3133 Contingent liabilities guarantors [axis] Axis pkx:ContingentLiabilitiesGuarantorsAxis
3134 Contingent liabilities guarantors [domain] Member pkx:ContingentLiabilitiesGuarantorsDomain
3135 Posco [member] Member ifrs-full:ParentMember
3136 POSCO DAEWOO Corporation [member] Member pkx:POSCODAEWOOCorporationMember
3137 POSCO ENGINEERING & CONSTRUCTION CO., LTD. [member] Member pkx:POSCOENGINEERINGAndCONSTRUCTIONCOLTDMember
3138 POSCO ICT [member] Member pkx:POSCOICTMember
3139 POSCO M-TECH [member] Member pkx:POSCOMTECHMember
3140 POSCO COATED & COLOR STEEL Co., Ltd. [member] Member pkx:POSCOCOATEDAndCOLORSTEELCoLtdMember
3141 POSCO ENERGY CO., LTD. [member] Member pkx:POSCOENERGYCOLTDMember
3142 POSCO AUSTRALIA PTY LTD [member] Member pkx:POSCOAUSTRALIAPTYLTDMember
3143 Range [axis] Axis ifrs-full:RangeAxis
3144 Ranges [member] Member ifrs-full:RangesMember
3145 Top of range [member] Member ifrs-full:TopOfRangeMember
3146 Contingent liabilities guarantee beneficiary [axis] Axis pkx:ContingentLiabilitiesGuaranteeBeneficiaryAxis
3147 Contingent liabilities guarantee beneficiary [domain] Member pkx:ContingentLiabilitiesGuaranteeBeneficiaryDomain
3148 POSCO Asia Co., Ltd. [member] Member pkx:POSCOAsiaCoLtdMember
3149 POSCO ASSAN TST STEEL INDUSTRY [member] Member pkx:POSCOASSANTSTSTEELINDUSTRYMember
3150 POSCO COATED STEEL (THAILAND) CO., LTD. [member] Member pkx:POSCOCOATEDSTEELTHAILANDCOLTDMember
3151 POSCO Maharashtra Steel Private Limited [member] Member pkx:POSCOMaharashtraSteelPrivateLimitedMember
3152 POSCO MEXICO S.A. DE C.V. [member] Member pkx:POSCOMEXICOSADECVMember
3153 POSCO SS-VINA Co., Ltd [member] Member pkx:POSCOSSVINACoLtdMember
3154 POSCO-VIETNAM Co., Ltd. [member] Member pkx:POSCOVIETNAMCoLtdMember
3155 PT. KRAKATAU POSCO [member] Member pkx:PTKRAKATAUPOSCOMember
3156 Daewoo Global Development. Pte., Ltd [member] Member pkx:DaewooGlobalDevelopmentPteLtdMember
3157 DAEWOO POWER PNG Ltd. [member] Member pkx:DAEWOOPOWERPNGLtdMember
3158 POSCO DAEWOO INDIA PVT., LTD. [member] Member pkx:POSCODAEWOOINDIAPVTLTDMember
3159 PT. Bio Inti Agrindo [member] Member pkx:PTBioIntiAgrindoMember
3160 Golden Lace DAEWOO Company Limited [member] Member pkx:GoldenLaceDaewooCompanyLimitedMember
3161 POSCO DAEWOO CHINA CO., LTD. [member] Member pkx:POSCODAEWOOCHINACOLTDMember
3162 Songdo Posco Family housing [member] Member pkx:SongdoPoscoFamilyHousingMember
3163 POSCO E&C Vietnam Co., Ltd. [member] Member pkx:POSCOEAndCVietnamCoLtdMember
3164 HONG KONG POSCO E&C (CHINA) INVESTMENT Co., Ltd [member] Member pkx:HONGKONGPOSCOEAndCCHINAINVESTMENTCoLtdMember
3165 POSCO ENGINEERING & CONSTRUCTION DO BRAZIL LTDA. [member] Member pkx:POSCOENGINEERINGAndCONSTRUCTIONDOBRAZILLTDAMember
3166 PT. POSCO E&C INDONESIA [member] Member pkx:PTPOSCOEAndCINDONESIAMember
3167 PT.POSCO ICT INDONESIA [member] Member pkx:PTPOSCOICTINDONESIAMember
3168 PT.Krakatau Posco Chemtech Calcination [member] Member pkx:PTKrakatauPoscoChemtechCalcinationMember
3169 Myanmar POSCO C&C Company, Limited [member] Member pkx:MyanmarPOSCOCAndCCompanyLimitedMember
3170 PT. Krakatau Posco Energy [member] Member pkx:PTKRAKATAUPOSCOENERGYMember
3171 POSCO SINGAPORE LNG TRADING PTE. LTD [member] Member pkx:POSCOSINGAPORELNGTRADINGPTELTDMember
3172 CSP - Compania Siderurgica do Pecem [member] Member pkx:CSPCompaniaSiderurgicadoPecemMember
3173 LLP POSUK Titanium [member] Member pkx:LLPPOSUKTitaniumMember
3174 Nickel mining company SAS [member] Member pkx:NickelMiningCompanySASMember
3175 GLOBAL KOMSCO Daewoo LLC [member] Member pkx:GLOBALKOMSCODaewooLLCMember
3176 New Songdo International City Development, LLC [member] Member pkx:NewSongdoInternationalCityDevelopmentLLCMember
3177 UITrans LRT Co., Ltd. [member] Member pkx:UITransLRTCoLtdMember
3178 Chuncheon Energy Co., Ltd. [member] Member pkx:ChuncheonEnergyCoLtdMember
3179 Pohang E&E Co,. Ltd. [member] Member pkx:PohangEAndECoLtdMember
3180 JB CLARK HILLS [member] Member pkx:JbClarkHillsMember
3181 Incheon-Gimpo Expressway Co., Ltd. [member] Member pkx:IncheonGimpoExpresswayCoLtdMember
3182 UITrans LRT Co., Ltd. [member] Member pkx:UITRANSCORPORATIONMember
3183 KRAKATAU POS-CHEM DONG-SUH CHEMICAL [member] Member pkx:KRAKATAUPOSCHEMDONGSUHCHEMICALMember
3184 POS INFRA AUTO [member] Member pkx:POSINFRAAUTOMember
3185 Ambatovy Project Investments Limited and others [member] Member pkx:AmbatovyProjectInvestmentsLimitedAndOthersMember
3186 Ecocity Company Limited and Others [member] Member pkx:EcocityCOLTDAndOthersMember
3187 SMS Energy and others [member] Member pkx:SMSEnergyAndOthersMember
3188 Hyochun CO., LTD [member] Member pkx:HyochunCOLTDMember
3189 BLT Enterprise and others [member] Member pkx:BLTEnterpriseAndOthersMember
3190 Department of Trade and Investment (NSW Government) [member] Member pkx:DepartmentOfTradeAndInvestmentNSWGovernmentMember
3191 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
3192 Counterparties [member] Member ifrs-full:CounterpartiesMember
3193 BOC and others [member] Member pkx:BOCAndOthersMember
3194 SMBC and others [member] Member pkx:SMBCAndOthersMember
3195 The Great&CO Co., Ltd(SPC) [member] Member pkx:TheGreatAndCOCoLtdSPCMember
3196 Export-Import Bank of Korea and others [member] Member pkx:ExportImportBankOfKoreaAndOthersMember
3197 BOA and others [member] Member pkx:BoaAndOthersMember
3198 Export-Import Bank of Korea [member] Member pkx:ExportImportBankOfKoreaMember
3199 ING and others [member] Member pkx:INGAndOthersMember
3200 Shinhan Bank and others [member] Member pkx:ShinhanBankAndOthersMember
3201 KEB Hana Bank [member] Member pkx:KEBHanaBankMember
3202 Shinhan Bank [member] Member pkx:ShinhanBankMember
3203 Mizuho [member] Member pkx:MizuhoMember
3204 SHINYOUNG SECURITIES CO., LTD [member] Member pkx:ShinyoungSecuritiesCoLtdMember
3205 Woori Bank and others [member] Member pkx:WooriBankAndOthersMember
3206 Woori Bank [member] Member pkx:WooriBankMember
3207 POSCO Asia Co., Ltd. And others [member] Member pkx:POSCOAsiaCoLtdAndOthersMember
3208 POSCO Asia Co., Ltd. [member] Member pkx:POSCOAsiaCoLtdMember
3209 SMBC [member] Member pkx:SMBCMember
3210 BNDES [member] Member pkx:BNDESMember
3211 Industrial & Commercial Bank of China [member] Member pkx:IndustrialCommercialBankOfChinaMember
3212 Others [member] Member pkx:OtherFinancialInstitutionsMember
3213 Kookmin Bank and Other [member] Member pkx:KookminBankAndOtherMember
3214 Heungkuk Life Insurance Co. LTD [member] Member pkx:HeungkukLifeInsuranceCoLtdMember
3215 Korea Investment and securities co. ltd [member] Member pkx:KoreaInvestmentAndSecuritiesCoLtdMember
3216 Korea Development Bank [member] Member pkx:KoreaDevelopmentBankMember
3217 Kookmin Bank [member] Member pkx:KookminBankMember
3218 KEB Hana Bank and Others [member] Member pkx:KebHanaBankAndOthersMember
3219 Kyobo Securities Co, Ltd. [member] Member pkx:KyoboSecuritiesCoLtdMember
3220 Kyobo Life Insurance Co., Ltd and others [member] Member pkx:KyoboLifeInsuranceCoLtdAndOthersMember
3221 Currency [axis] Axis srt:CurrencyAxis
3222 All Currencies [Domain] Member currency:AllCurrenciesDomain
3223 USD [member] Member currency:USD
3224 KRW [member] Member currency:KRW
3225 Indonesia, Rupiahs Member currency:IDR
3226 India, Rupees Member currency:INR
3227 THB [member] Member currency:THB
3228 EUR [member] Member currency:EUR
3229 AUD [member] Member currency:AUD
3230 BRL [member] Member currency:BRL
3231 Disclosure of contingent liabilities [line items] LineItems ifrs-full:DisclosureOfContingentLiabilitiesLineItems
3232 Guarantee amount Concept (Monetary) As Of Credit pkx:FinancialEffectOfContingentLiabilities
3233 1226 - Disclosure - Commitments and Contingencies - Additional Information (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformation
3234 Disclosure of contingent liabilities [table] Table

*

*

ifrs-full:DisclosureOfContingentLiabilitiesTable
3235 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
3236 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
3237 Posco [member] Member ifrs-full:ParentMember
3238 POSCO ENGINEERING & CONSTRUCTION CO., LTD. [member] Member pkx:POSCOENGINEERINGAndCONSTRUCTIONCOLTDMember
3239 Busan E&E Co. [member] Member pkx:BusanEAndECoMember
3240 Woori Bank and others [member] Member pkx:WooriBankAndOthersMember
3241 POSCO ICT [member] Member pkx:POSCOICTMember
3242 Range [axis] Axis ifrs-full:RangeAxis
3243 Ranges [member] Member ifrs-full:RangesMember
3244 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
3245 Top of range [member] Member ifrs-full:TopOfRangeMember
3246 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
3247 Counterparties [member] Member ifrs-full:CounterpartiesMember
3248 Korea National Oil Corporation [member] Member pkx:KoreaNationalOilCorporationMember
3249 Korea Software Financial Cooperative [member] Member pkx:KoreaSoftwareFinancialCooperativeMember
3250 Seoul Guarantee Insurance [member] Member pkx:SeoulGuaranteeInsuranceMember
3251 Engineering Guarantee Insurance [member] Member pkx:EngineeringGuaranteeInsuranceMember
3252 Disclosure of contingent liabilities [line items] LineItems ifrs-full:DisclosureOfContingentLiabilitiesLineItems
3253 Completions guarantees provided Concept (Monetary) For Period ifrs-full:ProvisionOfGuaranteesOrCollateralByEntityRelatedPartyTransactions
3254 Construction guarantees received Concept (Monetary) For Period ifrs-full:ProvisionOfGuaranteesOrCollateralToEntityRelatedPartyTransactions
3255 Iron ore and coal contracts terms Concept (xbrli:durationItemType) For Period pkx:DescriptionOfIronOreAndCoalContractsPeriod
3256 Nickel contracts terms Concept (xbrli:durationItemType) For Period pkx:DescriptionOfNickelContractsPeriod
3257 Remaining iron ore to be purchased Concept (num:massItemType) For Period pkx:RemainingOfIronOreToBePurchased
3258 Remaining coal to be purchased Concept (num:massItemType) For Period pkx:RemainingOfCoalToBePurchased
3259 Liquefied natural gas to be purchased Concept (num:massItemType) For Period pkx:LiquefiedNaturalGasToBePurchased
3260 Liquefied natural gas terms Concept (xbrli:durationItemType) For Period pkx:DescriptionOfEnteringLongTermContractsPeriod
3261 Borrowings Concept (Monetary) As Of Credit ifrs-full:Borrowings
3262 Number of vessels for transportation of raw materials Concept (Integer) For Period pkx:NumberOfVessels
3263 Average remaining contract period Concept (xbrli:durationItemType) For Period pkx:AverageRemainingContractPeriod
3264 Freight expense Concept (Monetary) As Of Debit pkx:FreightExpenses
3265 Supplementary fund Concept (Monetary) As Of Credit pkx:SupplementaryFund
3266 Foreign currency guarantee Concept (Monetary) For Period Debit pkx:ForeignCurrencyGuarantee
3267 Contingent liabilities guarantee amount Concept (Monetary) As Of Credit pkx:FinancialEffectOfContingentLiabilities
3268 1227 - Disclosure - Commitments and Contingencies - Litigations in Progress (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureCommitmentsAndContingenciesLitigationsInProgress
3269 Disclosure of contingent liabilities [table] Table

*

*

ifrs-full:DisclosureOfContingentLiabilitiesTable
3270 Classes of contingent liabilities [axis] Axis ifrs-full:ClassesOfContingentLiabilitiesAxis
3271 Contingent liabilities [member] Member ifrs-full:ContingentLiabilitiesMember
3272 Litigations in progress [member] Member ifrs-full:LegalProceedingsContingentLiabilityMember
3273 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
3274 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
3275 Posco [member] Member ifrs-full:ParentMember
3276 POSCO DAEWOO Corporation [member] Member pkx:POSCODAEWOOCorporationMember
3277 POSCO ENGINEERING & CONSTRUCTION CO., LTD. [member] Member pkx:POSCOENGINEERINGAndCONSTRUCTIONCOLTDMember
3278 POSCO ICT [member] Member pkx:POSCOICTMember
3279 POSCO A&C [member] Member pkx:POSCOAAndCMember
3280 POSCO ENERGY CO., LTD. [member] Member pkx:POSCOENERGYCOLTDMember
3281 POSCO E&C CHINA Co., Ltd. [member] Member pkx:POSCOEAndCCHINACoLtdMember
3282 POSCO COATED & COLOR STEEL Co., Ltd. [member] Member pkx:POSCOCOATEDAndCOLORSTEELCoLtdMember
3283 POSCO ENGINEERING (THAILAND) CO., LTD. [member] Member pkx:POSCOENGINEERINGTHAILANDCOLTDMember
3284 PT. KRAKATAU POSCO [member] Member pkx:PTKRAKATAUPOSCOMember
3285 POSCO E&C Vietnam Co., Ltd. [member] Member pkx:POSCOEAndCVietnamCoLtdMember
3286 POSCO-China Qingdao Processing Center Co., Ltd. [member] Member pkx:POSCOChinaQingdaoProcessingCenterCoLtdMember
3287 POSCO-Malaysia SDN. BHD. [member] Member pkx:POSCOMalaysiaSDNBHDMember
3288 Pos-Sea Pte Ltd [member] Member pkx:PosSeaPteLtdMember
3289 POSCO INDIA HOLDINGS PRIVATE LIMITED [member] Member pkx:POSCOINDIAHOLDINGSPRIVATELIMITEDMember
3290 POSCO TNPC Otomotiv Celik San. Ve Tic. A.S [member] Member pkx:POSCOTNPCOtomotivCelikSanVeTicASMember
3291 POSCO India Steel Distribution Center Private Ltd [member] Member pkx:POSCOIndiaSteelDistributionCenterPrivateLtdMember
3292 POSCO(Dalian) IT Center Development Co., Ltd. [member] Member pkx:POSCODalianITCenterDevelopmentCoLtdMember
3293 Brazil Sao Paulo Steel Processing Center [member] Member pkx:BrazilSaoPauloSteelProcessingCenterMember
3294 POSCO ENGINEERING & CONSTRUCTION DO BRAZIL LTDA. [member] Member pkx:POSCOENGINEERINGAndCONSTRUCTIONDOBRAZILLTDAMember
3295 POSCO ASSAN TST STEEL INDUSTRY [member] Member pkx:POSCOASSANTSTSTEELINDUSTRYMember
3296 HONG KONG POSCO E&C (CHINA) INVESTMENT Co., Ltd [member] Member pkx:HONGKONGPOSCOEAndCCHINAINVESTMENTCoLtdMember
3297 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
3298 Others [Member] Member ifrs-full:OtherProvisionsMember
3299 Lawsuits provision [member] Member pkx:LawsuitsProvisionMember
3300 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
3301 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
3302 Korea [member] Member country:KR
3303 CAD [member] Member pkx:CadMember
3304 India [member] Member country:IN
3305 US [member] Member country:US
3306 Pakistan [member] Member country:PK
3307 Brazil [Member] Member country:BR
3308 China [member] Member country:CN
3309 Thailand [Member] Member country:TH
3310 Indonesia [Member] Member country:ID
3311 MYR [member] Member pkx:MyrMember
3312 India, Rupees Member currency:INR
3313 Turkey [Member] Member country:TR
3314 Disclosure of contingent liabilities [line items] LineItems ifrs-full:DisclosureOfContingentLiabilitiesLineItems
3315 Legal actions Concept (Integer) For Period pkx:NumberOfLegalProceeding
3316 Claim amount Concept (Monetary) As Of Credit pkx:FinancialEffectOfContingentLiabilities
3317 Claim amount Concept (Monetary) As Of Credit pkx:FinancialEffectOfContingentLiabilities
3318 Description Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfObligationContingentLiabilities
3319 Estimated lawsuits Concept (Decimal) For Period pkx:NumberOfLawsuitsFiled
3320 Provision for legal contingencies and claims Concept (Monetary) For Period Debit pkx:ProvisionForLegalContingenciesAndClaims
3321 1228 - Disclosure - Additional Information of Cash Flow Statements - Changes in Operating Assets and Liabilities (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureAdditionalInformationOfCashFlowStatementsChangesInOperatingAssetsAndLiabilities
3322 Implied Table Table

*

*

implied:Table
3323 Cash flows from (used in) operating activities [abstract] Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
3324 Trade accounts and notes receivable Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable
3325 Other receivables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInOtherOperatingReceivables
3326 Inventories Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
3327 Other current assets Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInOtherCurrentAssets
3328 Other non-currentassets Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInOtherAssets
3329 Trade accounts and notes payable Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAccountPayable
3330 Other payables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInOtherOperatingPayables
3331 Other current liabilities Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInOtherCurrentLiabilities
3332 Provisions Concept (Monetary) For Period Debit pkx:AdjustmentsForIncreaseDecreaseInProvisions
3333 Payments of severance benefits Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities
3334 Plan assets Concept (Monetary) For Period Debit pkx:AdjustmentsForDecreaseIncreaseInPlanAssets
3335 Other non-currentliabilities Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInOtherLiabilities
3336 Changes in operating cash flows Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInWorkingCapital
3337 1229 - Disclosure - Additional Information of Cash Flow Statements - Changes in Liabilities Arising from Financial Activities (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureAdditionalInformationOfCashFlowStatementsChangesInLiabilitiesArisingFromFinancialActivities
3338 Disclosure of reconciliation of liabilities arising from financing activities [table] Table

*

*

ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesTable
3339 Liabilities arising from financing activities [axis] Axis ifrs-full:LiabilitiesArisingFromFinancingActivitiesAxis
3340 Liabilities arising from financing activities [member] Member ifrs-full:LiabilitiesArisingFromFinancingActivitiesMember
3341 Short-term borrowings [member] Member ifrs-full:ShorttermBorrowingsMember
3342 Long-term borrowings [member] Member ifrs-full:LongtermBorrowingsMember
3343 Dividend payable [member] Member pkx:DividendPayableMember
3344 Finance lease liabilities [member] Member ifrs-full:LeaseLiabilitiesMember
3345 Derivatives that hedge long-term borrowings [member] Member pkx:DerivativesThatHedgeLongtermBorrowingsMember
3346 Disclosure of reconciliation of liabilities arising from financing activities [line items] LineItems ifrs-full:DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems
3347 Beginning Concept (Monetary) As Of Credit ifrs-full:LiabilitiesArisingFromFinancingActivities
3348 Changes from financing cash flows Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughFinancingCashFlowsLiabilitiesArisingFromFinancingActivities
3349 Changes arising from obtaining or losing control of subsidiaries or other business Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughObtainingOrLosingControlOfSubsidiariesOrOtherBusinessesLiabilitiesArisingFromFinancingActivities
3350 The effect of changes in foreign exchange rates Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities
3351 Changes in fair values Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangesInFairValuesLiabilitiesArisingFromFinancingActivities
3352 Other changes: Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities
3353 Decrease in retained earnings Concept (Monetary) For Period Credit pkx:IncreaseDecreaseThroughRetainedEarningsLiabilitiesArisingFromFinancingActivities
3354 Decrease in non-controllinginterest Concept (Monetary) For Period Credit pkx:IncreaseDecreaseThroughNoncontrollingInterestLiabilitiesArisingFromFinancingActivities
3355 Amortization of discount on debentures issued Concept (Monetary) For Period Credit pkx:IncreaseDecreaseThroughAmortizationOfDiscountLiabilitiesArisingFromFinancingActivities
3356 Increase in finance lease assets Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInNetInvestmentInFinanceLease
3357 Ending Concept (Monetary) As Of Credit ifrs-full:LiabilitiesArisingFromFinancingActivities
3358 1230 - Disclosure - Operating Segments - Information about Reportable Segments (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureOperatingSegmentsInformationAboutReportableSegments
3359 Disclosure of operating segments [table] Table

*

*

ifrs-full:DisclosureOfOperatingSegmentsTable
3360 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
3361 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
3362 Reportable segments [member] Member ifrs-full:OperatingSegmentsMember
3363 Segments [axis] Axis ifrs-full:SegmentsAxis
3364 Segments [member] Member ifrs-full:SegmentsMember
3365 Steel [member] Member pkx:SteelMember
3366 Trading [member] Member pkx:TradingMember
3367 Construction [member] Member pkx:ConstructionMember
3368 Other reportable segment [member] Member ifrs-full:AllOtherSegmentsMember
3369 Types of customers [axis] Axis ifrs-full:TypesOfCustomersAxis
3370 Types of customers [member] Member ifrs-full:TypesOfCustomersMember
3371 External customers [member] Member pkx:ExternalCustomersMember
3372 Internal customers [member] Member pkx:InternalCustomersMember
3373 Intersegment [member] Member pkx:IntersegmentMember
3374 Disclosure of operating segments [line items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
3375 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
3376 Interest income Concept (Monetary) For Period Credit ifrs-full:RevenueFromInterest
3377 Interest expenses Concept (Monetary) For Period Debit ifrs-full:InterestExpense
3378 Depreciation and amortization Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
3379 Impairment loss on property, plant and equipment and others Concept (Monetary) For Period Debit pkx:ImpairmentLossReversalOfImpairmentLossOnPropertyPlantAndEquipmentAndOthers
3380 Impairment loss on available-for-sale financial assets Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossOnFinancialAssets
3381 Share of profit or loss of investment in associates and joint ventures Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
3382 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
3383 Profit (loss) Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
3384 Assets Concept (Monetary) As Of Debit ifrs-full:Assets
3385 Investment in subsidiaries, associates and joint ventures Concept (Monetary) As Of Debit ifrs-full:InvestmentsInSubsidiariesJointVenturesAndAssociates
3386 Acquisition of non-currentassets Concept (Monetary) For Period Debit ifrs-full:AdditionsToNoncurrentAssets
3387 Liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
3388 1231 - Disclosure - Operating Segments - Reconciliation of Segment Revenues, Profit or Loss, Assets and Liabilities and Other Significant Items (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureOperatingSegmentsReconciliationOfSegmentRevenuesProfitOrLossAssetsAndLiabilitiesAndOtherSignificantItems
3389 Disclosure of operating segments [table] Table

*

*

ifrs-full:DisclosureOfOperatingSegmentsTable
3390 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
3391 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
3392 Reportable segments [member] Member ifrs-full:OperatingSegmentsMember
3393 Investments in subsidiaries, associates and joint ventures [member] Member pkx:InvestmentsInSubsidiariesAssociatesAndJointVenturesMember
3394 Goodwill and corporate FV adjustments [member] Member pkx:GoodwillAndCorporateFairValueAdjustmentsMember
3395 Elimination of inter-segment amounts [member] Member ifrs-full:EliminationOfIntersegmentAmountsMember
3396 Income tax expense [member] Member pkx:IncomeTaxExpensesMember
3397 Basis difference [member] Member pkx:BasisDifferenceMember
3398 Disclosure of operating segments [line items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
3399 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
3400 Profit before income tax expense Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
3401 Assets Concept (Monetary) As Of Debit ifrs-full:Assets
3402 Liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
3403 Interest income Concept (Monetary) For Period Credit ifrs-full:RevenueFromInterest
3404 Interest expenses Concept (Monetary) For Period Debit ifrs-full:InterestExpense
3405 Depreciation and amortization Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
3406 Share of profit or loss of investment in associates Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod
3407 Share of profit or loss of investment in associates Concept (Monetary) For Period Credit ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
3408 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
3409 Impairment loss on property, plant and equipment and others Concept (Monetary) For Period Debit pkx:ImpairmentLossReversalOfImpairmentLossOnPropertyPlantAndEquipmentAndOthers
3410 Impairment loss on available-for-sale financial assets Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossOnFinancialAssets
3411 Other significant items Concept (Monetary) For Period Credit pkx:OtherSignificantSegmentReconcilingItems
3412 1232 - Disclosure - Operating Segments - Revenue and Non-current Assets by Geographic Area (Detail) Network

*

*

http://imetrix.edgar-online.com/taxonomy/role/DisclosureOperatingSegmentsRevenueAndNoncurrentAssetsByGeographicArea
3413 Disclosure of geographical areas [table] Table

*

*

ifrs-full:DisclosureOfGeographicalAreasTable
3414 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
3415 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
3416 Reportable segments [member] Member ifrs-full:OperatingSegmentsMember
3417 Types of customers [axis] Axis ifrs-full:TypesOfCustomersAxis
3418 Types of customers [member] Member ifrs-full:TypesOfCustomersMember
3419 External customers [member] Member pkx:ExternalCustomersMember
3420 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
3421 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
3422 Domestic [member] Member ifrs-full:CountryOfDomicileMember
3423 Japan [member] Member country:JP
3424 China [member] Member country:CN
3425 Indonesia [Member] Member country:ID
3426 Asia-other [member] Member pkx:OtherAsianCountriesMember
3427 North America [member] Member srt:NorthAmericaMember
3428 Other countries [member] Member pkx:OtherForeignCountriesMember
3429 Basis difference [member] Member pkx:BasisDifferenceMember
3430 Disclosure of geographical areas [line items] LineItems ifrs-full:DisclosureOfGeographicalAreasLineItems
3431 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
3432 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssetsOtherThanFinancialInstrumentsDeferredTaxAssetsPostemploymentBenefitAssetsAndRightsArisingUnderInsuranceContracts

*

*