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Revenue - Contract (Tables) | 12 Months Ended
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Dec. 31, 2025
TextBlock 1 [Abstract] |
Summary of In-Progress Contracts |
(a) | Details of outstanding contracts as of December 31, 2024 and 2025 are as follows:
(in millions of Won) |  | 2024 |  |  | 2025 |
Accumulated cost |  | ￦ | 28,057,329 |  |  |  | 15,689,709 |
Accumulated contract profit |  |  | 1,935,732 |  |  |  | 1,165,262 |
Accumulated contract loss |  |  | (709,097 | ) |  |  | (729,880 | )
Accumulated contract revenue |  |  | 29,283,964 |  |  |  | 16,125,091 |
Summary of Due From Customers for Contract Work and Due to Customers for Contract Work |
(b) | Details of due from customers for contract work and due to customers for contract work as of December 31, 2024 and 2025 are as follows:
(in millions of Won) |  | 2024 |  |  | 2025 |
Due from customers for contract work |  | ￦ | 1,487,559 |  |  |  | 1,580,558 |
Due to customers for contract work |  |  | (452,839 | ) |  |  | (727,902 | )
|  | ￦ | 1,034,720 |  |  |  | 852,656 |
Summary of provision of construction loss explanatory |
(c) | Details of provisions of construction loss as of December 31, 2024 and 2025 are as follows:
(in millions of Won) |  | 2024 |  |  | 2025 |
Infrastructure-Construction segment |  | ￦ | 52,492 |  |  |  | 113,391 |
Others |  |  | 857 |  |  |  | 915 |
|  | ￦ | 53,349 |  |  |  | 114,306 |
Summary of Changes in Estimated Total Contract Costs and Impact on Profit or Loss |
(d) | For the years ended December 31, 2023, 2024 and 2025, the total contract revenues and the estimated total contract costs have changed and the impact of such changes on profit before income tax for the current and future periods are as follows:
(in millions of Won) |  | 2023 |  |  | 2024 |  |  | 2025 |
Changes in total contract revenues |  | ￦ | 1,362,828 |  |  |  | 1,346,547 |  |  |  | 1,198,301 |
Changes in estimated total contract costs |  |  | 1,419,726 |  |  |  | 1,578,811 |  |  |  | 1,242,208 |
Changes in profit before income taxes of construction contract : |  |  |  |  |  |  |  |  |  |  |  |
- Current period |  |  | (91,397 | ) |  |  | (314,409 | ) |  |  | (410,413 | )
- Future periods |  |  | 34,499 |  |  |  | 82,145 |  |  |  | 366,506 |
Summary of Expected Revenue In Relation To Performance Obligations |
(e) | As of December 31, 2025, revenue expected to be recognized in the future in relation to performance obligations that have not been fulfilled (or partially fulfilled) is as follows:
(in millions of Won) |  | 2026 |  |  | 2027 |  |  | 2028 |  |  | After 2029 |  |  | Total |
Expected revenue |  | ￦ | 7,319,357 |  |  |  | 5,242,014 |  |  |  | 2,928,964 |  |  |  | 2,330,608 |  |  |  | 17,820,943 |

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