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v3.23.1

Sales - Summary of Sales (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods |  | ₩ 69,184,469 | ₩ 58,800,977 | ₩ 56,685,109
Sales related to rendering of services |  | 714,602 | 456,400 | 429,350
Sales related to construction services |  | 646,953 | 754,998 | 812,175
Total revenue from external customers (Notes 2,4, 35, 45, 47) |  | 70,546,024 | 60,012,375 | 57,926,634
Domestic |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods |  | 68,578,390 | 58,359,774 | 56,381,405
Sales related to rendering of services |  | 370,799 | 252,216 | 223,075
Sales related to construction services |  | 193,541 | 159,262 | 170,895
Total revenue from external customers (Notes 2,4, 35, 45, 47) |  | 69,142,730 | 58,771,252 | 56,775,375
Domestic | Electricity |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods |  | 66,198,964 | 57,308,555 | 55,731,782
Domestic | Heat Supply |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods |  | 489,629 | 232,738 | 198,715
Domestic | Others |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods |  | 1,889,797 | 818,481 | 450,908
Domestic | Performance obligations satisfied at point in time |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Total revenue from external customers (Notes 2,4, 35, 45, 47) |  | 68,578,390 | 58,359,774 | 56,381,405
Domestic | Performance obligations satisfied over time |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Total revenue from external customers (Notes 2,4, 35, 45, 47) |  | 564,340 | 411,478 | 393,970
Overseas |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods |  | 606,079 | 441,203 | 303,704
Sales related to rendering of services |  | 343,803 | 204,184 | 206,275
Sales related to construction services |  | 453,412 | 595,736 | 641,280
Total revenue from external customers (Notes 2,4, 35, 45, 47) | [1] | 1,403,294 | 1,241,123 | 1,151,259
Overseas | Electricity |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods |  | 0 | 0 | 0
Overseas | Heat Supply |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods |  | 0 | 0 | 0
Overseas | Others |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Sales of goods |  | 606,079 | 441,203 | 303,704
Overseas | Performance obligations satisfied at point in time |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Total revenue from external customers (Notes 2,4, 35, 45, 47) |  | 606,079 | 441,203 | 303,704
Overseas | Performance obligations satisfied over time |  |  |  |
Disclosure of performance obligations [line items] |  |  |  |
Total revenue from external customers (Notes 2,4, 35, 45, 47) |  | ₩ 797,215 | ₩ 799,920 | ₩ 847,555
[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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