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v3.25.1

Sales - Summary of Sales (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods (Note 2) |  | ₩ 91,018,712 | ₩ 85,940,137 | ₩ 69,184,469
Sales related to rendering of services |  | 710,445 | 750,878 | 714,602
Sales related to construction services |  | 849,108 | 785,395 | 646,953
Total revenue from external customers (Notes 4, 35, 45, 47) |  | 92,578,265 | 87,476,410 | 70,546,024
Domestic |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods (Note 2) |  | 90,659,090 | 85,588,151 | 68,578,390
Sales related to rendering of services |  | 482,251 | 467,661 | 370,799
Sales related to construction services |  | 145,496 | 186,996 | 193,541
Total revenue from external customers (Notes 4, 35, 45, 47) |  | 91,286,837 | 86,242,808 | 69,142,730
Domestic | Electricity |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods (Note 2) |  | 88,889,764 | 82,954,778 | 66,198,964
Domestic | Heat Supply |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods (Note 2) |  | 363,154 | 440,435 | 489,629
Domestic | Others |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods (Note 2) |  | 1,406,172 | 2,192,938 | 1,889,797
Domestic | Performance obligations satisfied at point in time |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Total revenue from external customers (Notes 4, 35, 45, 47) |  | 90,659,090 | 85,588,151 | 68,578,390
Domestic | Performance obligations satisfied over time |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Total revenue from external customers (Notes 4, 35, 45, 47) |  | 627,747 | 654,657 | 564,340
Overseas |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods (Note 2) |  | 359,622 | 351,986 | 606,079
Sales related to rendering of services |  | 228,194 | 283,217 | 343,803
Sales related to construction services |  | 703,612 | 598,399 | 453,412
Total revenue from external customers (Notes 4, 35, 45, 47) | [1] | 1,291,428 | 1,233,602 | 1,403,294
Overseas | Electricity |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods (Note 2) |  | 0 | 0 | 0
Overseas | Heat Supply |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods (Note 2) |  | 0 | 0 | 0
Overseas | Others |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods (Note 2) |  | 359,622 | 351,986 | 606,079
Overseas | Performance obligations satisfied at point in time |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Total revenue from external customers (Notes 4, 35, 45, 47) |  | 359,622 | 351,986 | 606,079
Overseas | Performance obligations satisfied over time |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Total revenue from external customers (Notes 4, 35, 45, 47) |  | ₩ 931,806 | ₩ 881,616 | ₩ 797,215
[1] | Middle East and other Asian countries make up the majority of overseas revenue and non-current assets. Since the overseas revenue or non-current assets attributable to particular countries are not material, they are not disclosed individually.

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