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Commitments and Contingencies - Summary of SOC Projects (Detail) ₩ in Millions | Dec. 31, 2025 KRW (₩)
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Disclosure of contingent liabilities [line items] |
Approved amount | ₩ 2,486,755
Remaining balance after repayment | 1,395,830
SOC Projects [member] |
Disclosure of contingent liabilities [line items] |
Approved amount | 3,472,663
Remaining balance after repayment | 2,057,062
Associates and joint ventures [member] | SOC Projects [member] |
Disclosure of contingent liabilities [line items] |
Approved amount | 537,617
Remaining balance after repayment | 397,661
Associates and joint ventures [member] | SOC Projects [member] | POSCO DX Co., Ltd. [member] | Pocheon-Hwado Highway Corp. [member] |
Disclosure of contingent liabilities [line items] |
Approved amount | 24,923
Remaining balance after repayment | 22,234
Associates and joint ventures [member] | SOC Projects [member] | POSCO Eco & Challenge Co., Ltd. (formerly, POSCO ENGINEERING & CONSTRUCTION CO.,LTD.) [member] | Pocheon-Hwado Highway Corp. [member] |
Disclosure of contingent liabilities [line items] |
Approved amount | 319,515
Remaining balance after repayment | 285,039
Associates and joint ventures [member] | SOC Projects [member] | POSCO Eco & Challenge Co., Ltd. (formerly, POSCO ENGINEERING & CONSTRUCTION CO.,LTD.) [member] | Pohang E&E Co,. Ltd. [member] |
Disclosure of contingent liabilities [line items] |
Approved amount | 71,930
Remaining balance after repayment | 39,266
Associates and joint ventures [member] | SOC Projects [member] | POSCO Eco & Challenge Co., Ltd. (formerly, POSCO ENGINEERING & CONSTRUCTION CO.,LTD.) [member] | Pureun Tongyeong Enviro Co., Ltd. [member] |
Disclosure of contingent liabilities [line items] |
Approved amount | 25,630
Remaining balance after repayment | 9,804
Associates and joint ventures [member] | SOC Projects [member] | POSCO Eco & Challenge Co., Ltd. (formerly, POSCO ENGINEERING & CONSTRUCTION CO.,LTD.) [member] | Pure Gimpo Co., Ltd. [member] |
Disclosure of contingent liabilities [line items] |
Approved amount | 51,565
Remaining balance after repayment | 21,181
Associates and joint ventures [member] | SOC Projects [member] | POSCO Eco & Challenge Co., Ltd. (formerly, POSCO ENGINEERING & CONSTRUCTION CO.,LTD.) [member] | Clean Iksan Co., Ltd. [member] |
Disclosure of contingent liabilities [line items] |
Approved amount | 44,054
Remaining balance after repayment | 20,137
Others [member] |
Disclosure of contingent liabilities [line items] |
Approved amount | 1,947,125
Remaining balance after repayment | 1,036,505
Others [member] | SOC Projects [member] |
Disclosure of contingent liabilities [line items] |
Approved amount | 2,935,046
Remaining balance after repayment | 1,659,401
Others [member] | SOC Projects [member] | POSCO DX Co., Ltd. [member] | Western Inland highway CO.,LTD. [member] |
Disclosure of contingent liabilities [line items] |
Approved amount | 47,348
Remaining balance after repayment | 32,668
Others [member] | SOC Projects [member] | POSCO DX Co., Ltd. [member] | Busan Sanseong Tunnel [member] |
Disclosure of contingent liabilities [line items] |
Approved amount | 7,621
Remaining balance after repayment | 7,621
Others [member] | SOC Projects [member] | POSCO Eco & Challenge Co., Ltd. (formerly, POSCO ENGINEERING & CONSTRUCTION CO.,LTD.) [member] | Western Seoul highway CO.,LTD. and others [member] |
Disclosure of contingent liabilities [line items] |
Approved amount | 63,683
Remaining balance after repayment | 28,201
Others [member] | SOC Projects [member] | POSCO Eco & Challenge Co., Ltd. (formerly, POSCO ENGINEERING & CONSTRUCTION CO.,LTD.) [member] | Western Inland highway CO.,LTD. and others [member] |
Disclosure of contingent liabilities [line items] |
Approved amount | 2,778,848
Remaining balance after repayment | 1,562,721
Others [member] | SOC Projects [member] | POSCO Eco & Challenge Co., Ltd. (formerly, POSCO ENGINEERING & CONSTRUCTION CO.,LTD.) [member] | Pohang Youngil Bay New Port [member] |
Disclosure of contingent liabilities [line items] |
Approved amount | 2,250
Remaining balance after repayment | 1,440
Others [member] | SOC Projects [member] | POSCO Eco & Challenge Co., Ltd. (formerly, POSCO ENGINEERING & CONSTRUCTION CO.,LTD.) [member] | Busan Sanseong Tunnel [member] |
Disclosure of contingent liabilities [line items] |
Approved amount | 35,296
Remaining balance after repayment | ₩ 26,750

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