XML 183 R173.htm IDEA: XBRL DOCUMENT
v3.26.1

Financial Instruments - Impairment Losses on Financial Assets (Detail) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Disclosure of financial assets [line items] |  |  |
Beginning |  | ₩ 1,114,370 | ₩ 952,719
Others |  | 51,618 | 47,873
Ending |  | 1,365,104 | 1,114,370
Bad debt expenses [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Impairment loss on financial assets |  | 168,960 | 134,230
Others [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Impairment loss on financial assets | [1] | 53,355 | 68,979
Less: Recovery of allowance for other bad debt accounts |  | (18,513) | (18,080)
Others | [2] | ₩ 46,932 | ₩ (23,478)
[1] | Other bad debt expenses are mainly related to loans and other accounts receivable.
[2] | Others for the years ended December 31, 2024 and 2025, include write-off amounting to ￦75,349 million and ￦33,648 million, respectively.

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfFinancialAssetsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2025-01-01 -Paragraph 126 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2025-en-r&anchor=para_126_b&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2025-01-01 -Paragraph 129 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2025-en-r&anchor=para_129_b&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 250 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_250_b&doctype=Standard -URIDate 2025-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 250 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_250_b&doctype=Standard -URIDate 2025-03-27 + Details
Name: | ifrs-full_ReversalOfImpairmentLossRecognisedInProfitOrLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Allowance for credit losses of financial assets. + References No definition available. + Details
Name: | pkx_AllowanceForCreditLossesOfFinancialAssets
Namespace Prefix: | pkx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Financial assets impairment loss. + References No definition available. + Details
Name: | pkx_FinancialAssetsImpairmentLoss
Namespace Prefix: | pkx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Impairment loss (reversal of impairment loss) recognised in profit or loss, intangible assets and goodwill. + References No definition available. + Details
Name: | pkx_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossIntangibleAssetsAndGoodwill
Namespace Prefix: | pkx_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_CategoriesOfFinancialAssetsAxis=pkx_BadDebtExpensesReversalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialAssetsAxis=pkx_OtherFinancialAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |