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Commitments and Contingencies - Summary of Payment Guarantee Provided to Clients (Detail) ₩ in Millions | Dec. 31, 2025 KRW (₩)
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Disclosure In Tabular Form Of Payment Guarantee Provided To Clients [Line Items] |
Agreed amount | ₩ 2,486,755
Executed amount | 1,395,830
Others [member] |
Disclosure In Tabular Form Of Payment Guarantee Provided To Clients [Line Items] |
Agreed amount | 1,947,125
Executed amount | 1,036,505
Payment guarantees Company provides to clients [member] |
Disclosure In Tabular Form Of Payment Guarantee Provided To Clients [Line Items] |
Agreed amount | 8,823,995
Executed amount | 8,814,785
Payment guarantees Company provides to clients [member] | Subsidiaries [member] |
Disclosure In Tabular Form Of Payment Guarantee Provided To Clients [Line Items] |
Agreed amount | 11,303
Executed amount | 11,303
Payment guarantees Company provides to clients [member] | Subsidiaries [member] | Korea Trade Insurance Corporation and others [Member] | Ventanas Philippines Construction Inc [member] | POSCO Eco & Challenge Co., Ltd. (formerly, POSCO ENGINEERING & CONSTRUCTION CO.,LTD.) [member] |
Disclosure In Tabular Form Of Payment Guarantee Provided To Clients [Line Items] |
Agreed amount | 11,202
Executed amount | 11,202
Payment guarantees Company provides to clients [member] | Subsidiaries [member] | CI Guarantee [Member] | POSCO and others [Member] | POSCO GYR Tech [Member] |
Disclosure In Tabular Form Of Payment Guarantee Provided To Clients [Line Items] |
Agreed amount | 101
Executed amount | 101
Payment guarantees Company provides to clients [member] | Associates and joint ventures [member] |
Disclosure In Tabular Form Of Payment Guarantee Provided To Clients [Line Items] |
Agreed amount | 5,460
Executed amount | 5,460
Payment guarantees Company provides to clients [member] | Associates and joint ventures [member] | Hana Bank Bahrain [member] | PT.Tanggamus Electric Power [member] | POSCO Eco & Challenge Co., Ltd. (formerly, POSCO ENGINEERING & CONSTRUCTION CO.,LTD.) [member] |
Disclosure In Tabular Form Of Payment Guarantee Provided To Clients [Line Items] |
Agreed amount | 2,877
Executed amount | 2,877
Payment guarantees Company provides to clients [member] | Associates and joint ventures [member] | Hana Bank Bahrain [member] | PT. Wampu Electric Power [member] | POSCO Eco & Challenge Co., Ltd. (formerly, POSCO ENGINEERING & CONSTRUCTION CO.,LTD.) [member] |
Disclosure In Tabular Form Of Payment Guarantee Provided To Clients [Line Items] |
Agreed amount | 2,583
Executed amount | 2,583
Payment guarantees Company provides to clients [member] | Others [member] |
Disclosure In Tabular Form Of Payment Guarantee Provided To Clients [Line Items] |
Agreed amount | 8,807,232
Executed amount | 8,798,022
Payment guarantees Company provides to clients [member] | Others [member] | CI Guarantee [Member] | KEPCO KPS and others [Member] | POSCO GYR Tech [Member] |
Disclosure In Tabular Form Of Payment Guarantee Provided To Clients [Line Items] |
Agreed amount | 1,095
Executed amount | 1,095
Payment guarantees Company provides to clients [member] | Others [member] | Construction Guarantee Cooperative and others [member] | DAEWOO ENGINEERING & CONSTRUCTION Co., Ltd [member] | POSCO Eco & Challenge Co., Ltd. (formerly, POSCO ENGINEERING & CONSTRUCTION CO.,LTD.) [member] |
Disclosure In Tabular Form Of Payment Guarantee Provided To Clients [Line Items] |
Agreed amount | 8,803,087
Executed amount | 8,793,877
Payment guarantees Company provides to clients [member] | Others [member] | Seoul Guarantee Insurance | Human Eco-Land Co., Ltd | POSCO WIDE Co Ltd [Member] |
Disclosure In Tabular Form Of Payment Guarantee Provided To Clients [Line Items] |
Agreed amount | 3,050
Executed amount | ₩ 3,050

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