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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2025
TextBlock 1 [Abstract] |
Summary of Revenue Disaggregated by Types of Revenue and Timing of Revenue Recognition |
(a) | Disaggregation of revenue
Details of revenue disaggregated by types of revenue and timing of revenue recognition for the years ended December 31, 2023, 2024 and 2025 are as follows:
| 1) | For the year ended December 31, 2023
(in millions of Won) |  |  |  |  | Infrastructure |  |  |  |  |  |  |  |  |  |
|  | Steel |  |  | Trading |  |  | Construction |  |  | Logistics and others |  |  | Rechargeable Battery Materials |  |  | Others |  |  | Total |
Types of revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from sales of goods |  | ￦ | 39,435,236 |  |  |  | 20,973,059 |  |  |  | — |  |  |  | 17,923 |  |  |  | 3,775,215 |  |  |  | — |  |  |  | 64,201,433 |
Revenue from services |  |  | 807,142 |  |  |  | 3,056,272 |  |  |  | 142,902 |  |  |  | 397,421 |  |  |  | 4,415 |  |  |  | 13,082 |  |  |  | 4,421,234 |
Revenue from construction contract |  |  | — |  |  |  | — |  |  |  | 8,070,120 |  |  |  | — |  |  |  | 36,404 |  |  |  | — |  |  |  | 8,106,524 |
Others |  |  | 150,895 |  |  |  | 4,175 |  |  |  | 17,460 |  |  |  | 55,269 |  |  |  | 8 |  |  |  | 99,551 |  |  |  | 327,358 |
|  | ￦ | 40,393,273 |  |  |  | 24,033,506 |  |  |  | 8,230,482 |  |  |  | 470,613 |  |  |  | 3,816,042 |  |  |  | 112,633 |  |  |  | 77,056,549 |
Timing of revenue recognition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue recognized at a point in time |  | ￦ | 39,586,131 |  |  |  | 20,977,234 |  |  |  | 375,118 |  |  |  | 73,192 |  |  |  | 3,775,223 |  |  |  | 99,551 |  |  |  | 64,886,449 |
Revenue recognized over time |  |  | 807,142 |  |  |  | 3,056,272 |  |  |  | 7,855,364 |  |  |  | 397,421 |  |  |  | 40,819 |  |  |  | 13,082 |  |  |  | 12,170,100 |
|  | ￦ | 40,393,273 |  |  |  | 24,033,506 |  |  |  | 8,230,482 |  |  |  | 470,613 |  |  |  | 3,816,042 |  |  |  | 112,633 |  |  |  | 77,056,549 |
| 2) | For the year ended December 31, 2024
(in millions of Won) |  |  |  |  | Infrastructure |  |  |  |  |  |  |  |  |  |
|  | Steel |  |  | Trading |  |  | Construction |  |  | Logistics and others |  |  | Rechargeable Battery Materials |  |  | Others |  |  | Total |
Types of revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from sales of goods |  | ￦ | 38,049,273 |  |  |  | 20,059,155 |  |  |  | — |  |  |  | 11,894 |  |  |  | 2,783,237 |  |  |  | — |  |  |  | 60,903,559 |
Revenue from services |  |  | 889,556 |  |  |  | 2,736,866 |  |  |  | 127,572 |  |  |  | 363,384 |  |  |  | 3,676 |  |  |  | 3,579 |  |  |  | 4,124,633 |
Revenue from construction contract |  |  | — |  |  |  | — |  |  |  | 8,052,414 |  |  |  | — |  |  |  | 25,636 |  |  |  | — |  |  |  | 8,078,050 |
Others |  |  | 165,266 |  |  |  | 7,752 |  |  |  | 64,285 |  |  |  | 46,464 |  |  |  | — |  |  |  | 69,399 |  |  |  | 353,166 |
|  | ￦ | 39,104,095 |  |  |  | 22,803,773 |  |  |  | 8,244,271 |  |  |  | 421,742 |  |  |  | 2,812,549 |  |  |  | 72,978 |  |  |  | 73,459,408 |
Timing of revenue recognition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue recognized at a point in time |  | ￦ | 38,214,539 |  |  |  | 20,066,907 |  |  |  | 1,326,130 |  |  |  | 58,358 |  |  |  | 2,783,237 |  |  |  | 69,399 |  |  |  | 62,518,570 |
Revenue recognized over time |  |  | 889,556 |  |  |  | 2,736,866 |  |  |  | 6,918,141 |  |  |  | 363,384 |  |  |  | 29,312 |  |  |  | 3,579 |  |  |  | 10,940,838 |
|  | ￦ | 39,104,095 |  |  |  | 22,803,773 |  |  |  | 8,244,271 |  |  |  | 421,742 |  |  |  | 2,812,549 |  |  |  | 72,978 |  |  |  | 73,459,408 |
| 3) | For the year ended December 31, 2025
(in millions of Won) |  |  |  |  | Infrastructure |  |  |  |  |  |  |  |  |  |
|  | Steel |  |  | Trading |  |  | Construction |  |  | Logistics and others |  |  | Rechargeable Battery Materials |  |  | Others |  |  | Total |
Types of revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from sales of goods |  | ￦ | 36,276,548 |  |  |  | 21,387,183 |  |  |  | — |  |  |  | 1,174 |  |  |  | 2,036,620 |  |  |  | 759 |  |  |  | 59,702,284 |
Revenue from services |  |  | 852,575 |  |  |  | 2,259,069 |  |  |  | 131,558 |  |  |  | 259,477 |  |  |  | 3,780 |  |  |  | 3,803 |  |  |  | 3,510,262 |
Revenue from construction contract |  |  | — |  |  |  | — |  |  |  | 5,355,413 |  |  |  | — |  |  |  | 43,484 |  |  |  | — |  |  |  | 5,398,897 |
Others |  |  | 155,736 |  |  |  | 97,852 |  |  |  | 20,506 |  |  |  | 48,047 |  |  |  | 12,434 |  |  |  | 40,920 |  |  |  | 375,495 |
|  | ￦ | 37,284,859 |  |  |  | 23,744,104 |  |  |  | 5,507,477 |  |  |  | 308,698 |  |  |  | 2,096,318 |  |  |  | 45,482 |  |  |  | 68,986,938 |
Timing of revenue recognition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue recognized at a point in time |  | ￦ | 36,432,284 |  |  |  | 21,485,035 |  |  |  | 80,554 |  |  |  | 49,221 |  |  |  | 2,049,054 |  |  |  | 41,680 |  |  |  | 60,137,828 |
Revenue recognized over time (*1) |  |  | 852,575 |  |  |  | 2,259,069 |  |  |  | 5,426,923 |  |  |  | 259,477 |  |  |  | 47,264 |  |  |  | 3,802 |  |  |  | 8,849,110 |
|  | ￦ | 37,284,859 |  |  |  | 23,744,104 |  |  |  | 5,507,477 |  |  |  | 308,698 |  |  |  | 2,096,318 |  |  |  | 45,482 |  |  |  | 68,986,938 |
(*1) | The amount generated from the construction contract revenue recognized over time by POSCO Eco & Challenge Co., Ltd. is ￦ 5,193,949 million.
Summary of Contract Assets and Liabilities From Contracts With Customers |
(b) | Details of contract assets and liabilities from contracts with customers as of December 31, 2024 and 2025 are as follows:
(in millions of Won) |  | 2024 |  |  | 2025 |
Receivables |  |  |  |  |  |  |  |
Trade accounts and notes receivable |  | ￦ | 9,374,086 |  |  |  | 9,633,285 |
Contract assets |  |  |  |  |  |  |  |
Due from customers for contract work |  |  | 1,475,180 |  |  |  | 1,570,397 |
Contract liabilities(*) |  |  |  |  |  |  |  |
Advances received |  |  | 342,314 |  |  |  | 646,609 |
Due to customers for contract work |  |  | 452,839 |  |  |  | 727,902 |
Unearned revenue |  |  | 89,807 |  |  |  | 100,967 |
Summary Of Contract Liabilities Balance Explanatory |
(*) | Details of the contract liabilities balance of POSCO Eco & Challenge Co., Ltd., a major subsidiary, that were recognized as revenue for the years ended December 31, 2024 and 2025 are as follows:
(in millions of Won) |  | 2024 |  |  | 2025 |
Contract liability balance at the beginning of the reporting period recognized as revenue |  | ￦ | 1,040,198 |  |  |  | 334,179 |

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