XML 170 R157.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Investments in Associates 4 (Details) - KRW (₩) ₩ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of associates [line items] |  |  |  |  |  |
Effective percentage of ownership |  |  |  | 20.00% |  |
Book value |  | ₩ 6,176,889 |  | ₩ 5,844,464 |  | ₩ 5,232,373
Korea Gas Corporation |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 9,826,038 |  | ₩ 10,410,740 |  |
Effective percentage of ownership | [1] | 20.47% |  | 20.47% |  |
Share in net assets |  | ₩ 2,011,390 |  | ₩ 2,131,078 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | (40,747) |  | (45,782) |  |
Book value |  | 1,970,643 |  | 2,085,296 |  | 1,815,513
Korea Electric Power Industrial Development Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 101,723 |  | ₩ 107,166 |  |
Effective percentage of ownership | [1] | 29.00% |  | 29.00% |  |
Share in net assets |  | ₩ 29,500 |  | ₩ 31,078 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 29,500 |  | 31,078 |  | 24,617
YTN Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 244,080 |  | ₩ 256,791 |  |
Effective percentage of ownership | [1] | 21.43% |  | 21.43% |  |
Share in net assets |  | ₩ 52,303 |  | ₩ 55,027 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 52,303 | [2] | 55,027 | [3] | 51,828
Gangwon Wind Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 79,682 |  | ₩ 80,729 |  |
Effective percentage of ownership | [1] | 15.00% |  | 15.00% |  |
Share in net assets |  | ₩ 11,952 |  | ₩ 12,109 |  |
Investment differential |  | 49 |  | 49 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 12,001 | [4] | 12,158 | [4] | 10,554
Hyundai Green Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 407,491 |  | ₩ 413,072 |  |
Effective percentage of ownership | [1] | 29.00% |  | 29.00% |  |
Share in net assets |  | ₩ 118,173 |  | ₩ 119,791 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 118,173 |  | 119,791 |  | 121,955
Korea Power Exchange |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 274,286 |  | ₩ 275,126 |  |
Effective percentage of ownership | [1] | 100.00% |  | 100.00% |  |
Share in net assets |  | ₩ 274,286 |  | ₩ 275,126 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 274,286 | [5] | 275,126 | [5] | 269,728
Taebaek Wind Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  |  |  | ₩ 24,168 |  |
Effective percentage of ownership | [1] |  |  | 60.00% |  |
Share in net assets |  |  |  | ₩ 14,501 |  |
Investment differential |  |  |  | 0 |  |
Intercompany transaction |  |  |  | 0 |  |
Others |  |  |  | 0 |  |
Book value |  | 0 |  | 14,501 | [6] | 6,800
Taebaek Guinemi Wind Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 16,043 |  | ₩ 15,327 |  |
Effective percentage of ownership | [1] | 67.25% |  | 67.25% |  |
Share in net assets |  | ₩ 10,788 |  | ₩ 10,307 |  |
Investment differential |  | 2,742 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 2,742 |  |
Book value |  | 13,530 | [7] | 13,049 | [6] | 3,357
Daeryun Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 403,701 |  | ₩ 402,140 |  |
Effective percentage of ownership | [1] | 6.85% |  | 6.85% |  |
Share in net assets |  | ₩ 27,654 |  | ₩ 27,547 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | (820) |  | (820) |  |
Book value |  | 26,834 | [4] | 26,727 | [4] | 25,426
KNH Solar Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 11,828 |  | ₩ 10,679 |  |
Effective percentage of ownership | [1] | 27.00% |  | 27.00% |  |
Share in net assets |  | ₩ 3,194 |  | ₩ 2,883 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 3,194 |  | 2,883 |  | 2,278
SPC Power Corporation |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 258,764 |  | ₩ 228,534 |  |
Effective percentage of ownership | [1] | 38.00% |  | 38.00% |  |
Share in net assets |  | ₩ 98,330 |  | ₩ 86,843 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | (19,399) |  | (15,975) |  |
Book value |  | 78,931 | [8] | 70,868 | [9] | 65,046
Gemeng International Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 2,317,545 |  | ₩ 2,335,997 |  |
Effective percentage of ownership | [1] | 42.00% |  | 34.00% |  |
Share in net assets |  | ₩ 973,369 |  | ₩ 794,239 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | (267,557) |  | (215,418) |  |
Book value |  | 705,812 |  | 578,821 |  | 595,218
PT. Cirebon Electric Power |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 488,215 |  | ₩ 491,324 |  |
Effective percentage of ownership | [1] | 27.50% |  | 27.50% |  |
Share in net assets |  | ₩ 134,259 |  | ₩ 135,114 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 134,259 |  | 135,114 |  | 121,969
KNOC Nigerian East Oil Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ (84,988) |  | ₩ (83,483) |  |
Effective percentage of ownership | [1] | 14.63% |  | 14.63% |  |
Share in net assets |  | ₩ (12,434) |  | ₩ (12,214) |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 12,434 |  | 12,214 |  |
Book value |  | 0 | [10] | 0 | [10] | 0
KNOC Nigerian West Oil Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ (78,143) |  | ₩ (76,755) |  |
Effective percentage of ownership | [1] | 14.63% |  | 14.63% |  |
Share in net assets |  | ₩ (11,432) |  | ₩ (11,229) |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 11,432 |  | 11,229 |  |
Book value |  | 0 | [10] | 0 | [10] | 0
PT Wampu Electric Power |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 75,120 |  | ₩ 82,051 |  |
Effective percentage of ownership | [1] | 46.00% |  | 46.00% |  |
Share in net assets |  | ₩ 34,555 |  | ₩ 37,743 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 34,555 |  | 37,743 |  | 35,077
PT. Bayan Resources TBK |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 2,428,465 |  | ₩ 2,476,409 |  |
Effective percentage of ownership | [1] | 20.00% |  | 20.00% |  |
Share in net assets |  | ₩ 485,693 |  | ₩ 495,282 |  |
Investment differential |  | 209,894 |  | 265,817 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | (76,380) |  | (76,380) |  |
Book value |  | 619,207 |  | 684,719 |  | 661,289
S-Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 334,591 |  | ₩ 290,656 |  |
Effective percentage of ownership | [1] | 49.00% |  | 49.00% |  |
Share in net assets |  | ₩ 163,950 |  | ₩ 142,421 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | (1,185) |  | (1,293) |  |
Others |  | 0 |  | 0 |  |
Book value |  | 162,765 |  | 141,128 |  | 122,786
Pioneer Gas Power Limited |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ (257,311) |  | ₩ (205,787) |  |
Effective percentage of ownership | [1] | 38.50% |  | 38.50% |  |
Share in net assets |  | ₩ (99,058) |  | ₩ (79,223) |  |
Investment differential |  | 22,278 |  | 22,278 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 76,780 |  | 56,945 |  |
Book value |  | 0 |  | 0 |  | 0
Eurasia Energy Holdings |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  |  |  | ₩ (508) |  |
Effective percentage of ownership | [1] |  |  | 40.00% |  |
Share in net assets |  |  |  | ₩ (203) |  |
Investment differential |  |  |  | 0 |  |
Intercompany transaction |  |  |  | 0 |  |
Others |  |  |  | 203 |  |
Book value |  | 0 |  | 0 |  | 0
Xe-Pian Xe-Namnoy Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 469,397 |  | ₩ 466,385 |  |
Effective percentage of ownership | [1] | 25.00% |  | 25.00% |  |
Share in net assets |  | ₩ 117,349 |  | ₩ 116,596 |  |
Investment differential |  | 305 |  | 305 |  |
Intercompany transaction |  | (987) |  | (1,028) |  |
Others |  | (289) |  | (289) |  |
Book value |  | 116,378 |  | 115,584 |  | 92,441
PT. Mutiara Jawa |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 17,822 |  | ₩ 12,402 |  |
Effective percentage of ownership | [1] | 29.00% |  | 29.00% |  |
Share in net assets |  | ₩ 5,168 |  | ₩ 3,597 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 5,168 |  | 3,597 |  | 2,569
Samcheok Eco Materials Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ (17,351) |  | ₩ 23,343 |  |
Effective percentage of ownership | [1] | 25.54% |  | 25.54% |  |
Share in net assets |  | ₩ (4,431) |  | ₩ 5,962 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 4,431 |  | (5,962) |  |
Book value |  | 0 |  | 0 |  | 0
Noeul Green Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ (17,973) |  | ₩ (18,861) |  |
Effective percentage of ownership | [1] | 29.00% |  | 29.00% |  |
Share in net assets |  | ₩ (5,212) |  | ₩ (5,470) |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 5,212 |  | 5,470 |  |
Book value |  | 0 |  | 0 |  | 3,808
Goseong Green Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 1,001,702 |  | ₩ 1,001,651 |  |
Effective percentage of ownership | [1] | 29.00% |  | 29.00% |  |
Share in net assets |  | ₩ 290,494 |  | ₩ 290,479 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | (2,870) |  | (1,586) |  |
Others |  | 0 |  | 0 |  |
Book value |  | 287,624 |  | 288,893 |  | 260,858
Gangneung Eco Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 716,901 |  | ₩ 7,464 |  |
Effective percentage of ownership | [1] | 29.00% |  | 1.61% |  |
Share in net assets |  | ₩ 207,901 |  | ₩ 120 |  |
Investment differential |  | 48,531 |  | 0 |  |
Intercompany transaction |  | (1,503) |  | (134) |  |
Others |  | 0 |  | 14 |  |
Book value |  | 254,929 | [11] | 0 | [4] | 2,288
Shin Pyeongtaek Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 390,335 |  | ₩ 363,838 |  |
Effective percentage of ownership | [1] | 40.00% |  | 40.00% |  |
Share in net assets |  | ₩ 156,134 |  | ₩ 145,535 |  |
Investment differential |  | 3,559 |  | 3,559 |  |
Intercompany transaction |  | (14,667) |  | (15,271) |  |
Others |  | 0 |  | 0 |  |
Book value |  | 145,026 |  | 133,823 |  | 93,074
Haeng Bok Do Si Photovoltaic Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 1,045 |  | ₩ 986 |  |
Effective percentage of ownership | [1] | 28.00% |  | 28.00% |  |
Share in net assets |  | ₩ 293 |  | ₩ 276 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 1 |  | 2 |  |
Book value |  | 294 |  | 278 |  | 223
Dongducheon Dream Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 294,848 |  | ₩ 302,071 |  |
Effective percentage of ownership | [1] | 34.01% |  | 34.01% |  |
Share in net assets |  | ₩ 100,278 |  | ₩ 102,734 |  |
Investment differential |  | 1,757 |  | 1,757 |  |
Intercompany transaction |  | (2,249) |  | (2,609) |  |
Others |  | (12,583) |  | (12,582) |  |
Book value |  | 87,203 | [12] | 89,300 | [12] | 74,198
Jinbhuvish Power Generation Pvt. Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 48,583 |  | ₩ 47,988 |  |
Effective percentage of ownership | [1] | 5.16% |  | 5.16% |  |
Share in net assets |  | ₩ 2,526 |  | ₩ 2,496 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | (2,526) |  | (2,496) |  |
Book value |  | 0 | [4] | 0 | [4] | 0
Daejung Offshore Wind Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 3,183 |  | ₩ 3,337 |  |
Effective percentage of ownership | [1] | 46.59% |  | 46.59% |  |
Share in net assets |  | ₩ 1,483 |  | ₩ 1,555 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 1,483 |  | 1,555 |  | 1,704
GS Donghae Electric Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 762,013 |  | ₩ 765,131 |  |
Effective percentage of ownership | [1] | 34.00% |  | 34.00% |  |
Share in net assets |  | ₩ 259,085 |  | ₩ 260,145 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 259,085 |  | 260,145 |  | 243,772
Daegu Photovoltaic Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 9,669 |  | ₩ 9,823 |  |
Effective percentage of ownership | [1] | 29.00% |  | 29.00% |  |
Share in net assets |  | ₩ 2,804 |  | ₩ 2,849 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 2,804 |  | 2,849 |  | 2,342
Busan Green Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 11,239 |  | ₩ 15,156 |  |
Effective percentage of ownership | [1] | 29.00% |  | 29.00% |  |
Share in net assets |  | ₩ 3,259 |  | ₩ 4,395 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 3,259 |  | 4,395 |  | 5,032
Gunsan Bio Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  |  |  | ₩ (21,127) |  |
Effective percentage of ownership | [1] |  |  | 18.87% |  |
Share in net assets |  |  |  | ₩ (3,986) |  |
Investment differential |  |  |  | 0 |  |
Intercompany transaction |  |  |  | 0 |  |
Others |  |  |  | 3,986 |  |
Book value |  | 0 |  | 0 | [4] | 0
Hansuwon KNP Co., Ltd. (formerly, Korea Nuclear Partners Co., Ltd.) |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 2,164 |  | ₩ 1,519 |  |
Effective percentage of ownership | [1] | 28.98% |  | 28.98% |  |
Share in net assets |  | ₩ 627 |  | ₩ 440 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | (160) |  | (160) |  |
Book value |  | 467 |  | 280 |  | 219
Korea Electric Power Corporation Fund |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 23,873 |  | ₩ 29,400 |  |
Effective percentage of ownership | [1] | 98.09% |  | 98.09% |  |
Share in net assets |  | ₩ 23,417 |  | ₩ 28,838 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 4 |  | 4 |  |
Book value |  | 23,421 | [13] | 28,842 | [13] | 47,983
Energy Infra Asset Management Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 12,257 |  | ₩ 11,956 |  |
Effective percentage of ownership | [1] | 9.90% |  | 9.90% |  |
Share in net assets |  | ₩ 1,213 |  | ₩ 1,184 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 1,213 | [14] | 1,184 | [4] | 1,066
Daegu clean Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 44 |  | ₩ 44 |  |
Effective percentage of ownership | [1] | 28.00% |  | 28.00% |  |
Share in net assets |  | ₩ 12 |  | ₩ 12 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | (12) |  | 0 |  |
Book value |  | 0 |  | 12 |  | 12
Yaksu ESS Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 980 |  | ₩ 1,670 |  |
Effective percentage of ownership | [1] | 29.00% |  | 29.00% |  |
Share in net assets |  | ₩ 284 |  | ₩ 484 |  |
Investment differential |  | 1 |  | 2 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 285 |  | 486 |  |
Nepal Water & Energy Development Company Private Limited |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 159,265 |  | ₩ 99,862 |  |
Effective percentage of ownership | [1] | 68.88% |  | 69.06% |  |
Share in net assets |  | ₩ 109,701 |  | ₩ 68,968 |  |
Investment differential |  | 872 |  | 972 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 110,573 |  | 69,940 |  |
Gwangyang Green Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 123,103 |  | ₩ 125,130 |  |
Effective percentage of ownership | [1] | 20.00% |  | 20.00% |  |
Share in net assets |  | ₩ 24,620 |  | ₩ 25,026 |  |
Investment differential |  | 18 |  | 18 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 24,638 |  | 25,044 |  | 25,466
PND Solar Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 4,677 |  | ₩ 4,306 |  |
Effective percentage of ownership | [1] | 29.00% |  | 29.00% |  |
Share in net assets |  | ₩ 1,356 |  | ₩ 1,249 |  |
Investment differential |  | 154 |  | 154 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 1,510 |  | 1,403 |  | 1,229
Hyundai Eco Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 40,699 |  | ₩ 39,033 |  |
Effective percentage of ownership | [1] | 19.00% |  | 19.00% |  |
Share in net assets |  | ₩ 7,733 |  | ₩ 7,416 |  |
Investment differential |  | 214 |  | 215 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 7,947 | [4] | 7,631 | [4] | 5,572
YeongGwang Yaksu Wind Electric Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 547 |  | ₩ 788 |  |
Effective percentage of ownership | [1] | 9.63% |  | 9.63% |  |
Share in net assets |  | ₩ 53 |  | ₩ 76 |  |
Investment differential |  | 300 |  | 300 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | (220) |  | (220) |  |
Book value |  | 133 | [4] | 156 | [4] | 233
Green Energy Electricity Generation Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ (2,658) |  | ₩ 2,733 |  |
Effective percentage of ownership | [1] | 29.00% |  | 29.00% |  |
Share in net assets |  | ₩ (771) |  | ₩ 793 |  |
Investment differential |  | 779 |  | 778 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 8 |  | 1,571 |  | 1,713
Korea Energy Solutions Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 848 |  | ₩ 466 |  |
Effective percentage of ownership | [1] | 20.00% |  | 20.00% |  |
Share in net assets |  | ₩ 170 |  | ₩ 93 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 170 |  | 93 |  | 123
ITR Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ (10) |  | ₩ (26) |  |
Effective percentage of ownership | [1] | 10.00% |  | 20.00% |  |
Share in net assets |  | ₩ (1) |  | ₩ (5) |  |
Investment differential |  | 0 |  | 1 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 1 |  | 4 |  |
Book value |  | 0 | [15] | 0 |  | 32
STN Co., Ltd. (formerly, Structure test network Co., Ltd.) |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 1,691 |  | ₩ 1,565 |  |
Effective percentage of ownership | [1] | 20.00% |  | 20.00% |  |
Share in net assets |  | ₩ 338 |  | ₩ 313 |  |
Investment differential |  | 53 |  | 53 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 391 |  | 366 |  | 306
Namjeongsusang Solar Power Operation Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  |  |  | ₩ 2,355 |  |
Effective percentage of ownership | [1] |  |  | 15.00% |  |
Share in net assets |  |  |  | ₩ 353 |  |
Investment differential |  |  |  | 20 |  |
Intercompany transaction |  |  |  | 0 |  |
Others |  |  |  | 0 |  |
Book value |  | 0 |  | 373 | [16] | 361
Indeck Niles Development, LLC |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 482,200 |  | ₩ 416,164 |  |
Effective percentage of ownership | [1] | 50.00% |  | 50.00% |  |
Share in net assets |  | ₩ 241,100 |  | ₩ 208,082 |  |
Investment differential |  | 90,074 |  | 93,956 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 4,227 |  | 0 |  |
Book value |  | 335,401 |  | 302,038 |  | 246,273
Indeck Niles Asset Management, LLC |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 278 |  | ₩ 283 |  |
Effective percentage of ownership | [1] | 33.33% |  | 33.33% |  |
Share in net assets |  | ₩ 93 |  | ₩ 94 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 93 |  | 94 |  | 111
Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1 |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 13,258 |  | ₩ 14,146 |  |
Effective percentage of ownership | [1] | 49.00% |  | 49.00% |  |
Share in net assets |  | ₩ 6,496 |  | ₩ 6,932 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 6,496 |  | 6,932 |  | 7,138
Suwon New Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 2,318 |  | ₩ 1,978 |  |
Effective percentage of ownership | [1] | 33.05% |  | 33.05% |  |
Share in net assets |  | ₩ 766 |  | ₩ 654 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 256 |  | 265 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 1,022 |  | 919 |  | 1,035
Gwangbaek Solar Power Investment Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 10,998 |  | ₩ 10,949 |  |
Effective percentage of ownership | [1] | 44.00% |  | 44.00% |  |
Share in net assets |  | ₩ 4,839 |  | ₩ 4,818 |  |
Investment differential |  | 316 |  | 315 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 5,155 |  | 5,133 |  | 4,806
Go deok Clean Energy Co., Ltd |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 11,807 |  | ₩ 11,049 |  |
Effective percentage of ownership | [1] | 40.00% |  | 40.00% |  |
Share in net assets |  | ₩ 4,723 |  | ₩ 4,420 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 4,723 |  | 4,420 |  | 4,302
SureDataLab Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 474 |  | ₩ 739 |  |
Effective percentage of ownership | [1] | 23.95% |  | 23.95% |  |
Share in net assets |  | ₩ 114 |  | ₩ 177 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 114 |  | 177 |  | 128
SEP Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ (72) |  | ₩ (65) |  |
Effective percentage of ownership | [1] | 21.26% |  | 21.26% |  |
Share in net assets |  | ₩ (15) |  | ₩ (14) |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 15 |  | 14 |  |
Book value |  | 0 |  | 0 |  | 7
Hankook Electric Power Information Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 1,296 |  | ₩ 1,337 |  |
Effective percentage of ownership | [1] | 16.49% |  | 16.49% |  |
Share in net assets |  | ₩ 214 |  | ₩ 220 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 214 | [17] | 220 | [17] | 161
Tronix Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 1,757 |  | ₩ 526 |  |
Effective percentage of ownership | [1] | 12.50% |  | 12.50% |  |
Share in net assets |  | ₩ 220 |  | ₩ 66 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 220 | [17] | 66 | [17] | 109
O2&B Global Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 105 |  | ₩ 181 |  |
Effective percentage of ownership | [1] | 20.00% |  | 20.00% |  |
Share in net assets |  | ₩ 21 |  | ₩ 36 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 21 |  | 36 |  | 35
Muan Sunshine Solar Power Plant Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 11,637 |  | ₩ 10,338 |  |
Effective percentage of ownership | [1] | 20.00% |  | 20.00% |  |
Share in net assets |  | ₩ 2,328 |  | ₩ 2,068 |  |
Investment differential |  | 494 |  | 494 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 2,822 |  | 2,562 |  | 1,268
Bigeum Resident Photovoltaic Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ (5,723) |  | ₩ (1,539) |  |
Effective percentage of ownership | [1] | 29.90% |  | 29.90% |  |
Share in net assets |  | ₩ (1,711) |  | ₩ (460) |  |
Investment differential |  | 24 |  | 24 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 1,687 |  | 436 |  |
Book value |  | 0 |  | 0 |  | 0
Goesan Solar Park Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 9,921 |  | ₩ 8,936 |  |
Effective percentage of ownership | [1] | 29.00% |  | 29.00% |  |
Share in net assets |  | ₩ 2,877 |  | ₩ 2,591 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 2,877 |  | 2,591 |  | 1,927
Saemangeum Heemang Photovoltaic Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 39,089 |  | ₩ 35,060 |  |
Effective percentage of ownership | [1] | 35.00% |  | 35.00% |  |
Share in net assets |  | ₩ 13,681 |  | ₩ 12,271 |  |
Investment differential |  | 739 |  | 739 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 14,420 |  | 13,010 |  | 10,238
Bitgoel Eco Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 25,269 |  | ₩ 18,249 |  |
Effective percentage of ownership | [1] | 49.05% |  | 49.05% |  |
Share in net assets |  | ₩ 12,394 |  | ₩ 8,951 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 12,394 |  | 8,951 |  | 4,356
Jeju Gimnyeong Wind Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 819 |  | ₩ 2,907 |  |
Effective percentage of ownership | [1] | 30.00% |  | 30.00% |  |
Share in net assets |  | ₩ 246 |  | ₩ 872 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 246 |  | 872 |  | 911
Seoroseoro Sunny Power Plant Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 2,163 |  | ₩ 1,970 |  |
Effective percentage of ownership | [1] | 42.58% |  | 42.58% |  |
Share in net assets |  | ₩ 921 |  | ₩ 839 |  |
Investment differential |  | 20 |  | 20 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 941 |  | 859 |  | 721
Muan Solar park Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 32,526 |  | ₩ 37,565 |  |
Effective percentage of ownership | [1] | 20.00% |  | 20.00% |  |
Share in net assets |  | ₩ 6,505 |  | ₩ 7,513 |  |
Investment differential |  | 325 |  | 325 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 6,830 |  | 7,838 |  | 6,083
YuDang Solar Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 2,849 |  | ₩ 2,929 |  |
Effective percentage of ownership | [1] | 20.00% |  | 20.00% |  |
Share in net assets |  | ₩ 570 |  | ₩ 586 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 570 |  | 586 |  | 565
Anjwa Smart Farm & Solar City Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 34,245 |  | ₩ 39,225 |  |
Effective percentage of ownership | [1] | 20.00% |  | 20.00% |  |
Share in net assets |  | ₩ 6,849 |  | ₩ 7,845 |  |
Investment differential |  | 816 |  | 817 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 7,665 |  | 8,662 |  | 6,784
KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.) |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 30,506 |  | ₩ 17,514 |  |
Effective percentage of ownership | [1] | 25.36% |  | 25.36% |  |
Share in net assets |  | ₩ 7,735 |  | ₩ 4,441 |  |
Investment differential |  | 44 |  | 44 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 7,779 |  | 4,485 |  | 3,877
G.GURU Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 676 |  | ₩ 1,216 |  |
Effective percentage of ownership | [1] | 24.65% |  | 24.65% |  |
Share in net assets |  | ₩ 167 |  | ₩ 300 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 167 |  | 300 |  | 403
UD4M Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 1,048 |  | ₩ 1,125 |  |
Effective percentage of ownership | [1] | 14.29% |  | 14.29% |  |
Share in net assets |  | ₩ 150 |  | ₩ 161 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 150 |  | 161 |  | 144
Dongbu Highway Solar Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 1,650 |  | ₩ 1,509 |  |
Effective percentage of ownership | [1] | 20.00% |  | 20.00% |  |
Share in net assets |  | ₩ 330 |  | ₩ 302 |  |
Investment differential |  | 50 |  | 50 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 380 |  | 352 |  |
Seobu Highway Solar Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 2,032 |  | ₩ 1,581 |  |
Effective percentage of ownership | [1] | 20.00% |  | 20.00% |  |
Share in net assets |  | ₩ 406 |  | ₩ 316 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 406 |  | 316 |  |
Korea Energy Data Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 122 |  | ₩ 211 |  |
Effective percentage of ownership | [1] | 29.37% |  | 29.37% |  |
Share in net assets |  | ₩ 36 |  | ₩ 62 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 36 |  | 62 |  | 62
Gangneung Sacheon Fuel Cell Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 18,982 |  | ₩ 10,218 |  |
Effective percentage of ownership | [1] | 41.00% |  | 41.00% |  |
Share in net assets |  | ₩ 7,783 |  | ₩ 4,189 |  |
Investment differential |  | 87 |  | 88 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 7,870 |  | 4,277 |  | 1,878
KOSTURE Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 174 |  | ₩ 156 |  |
Effective percentage of ownership | [1] | 4.42% |  | 0.82% |  |
Share in net assets |  | ₩ 8 |  | ₩ 1 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 8 | [4] | 1 | [4] | 0
Taebaek Gadeoksan Wind Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 57,135 |  | ₩ 58,940 |  |
Effective percentage of ownership | [1] | 34.00% |  | 34.00% |  |
Share in net assets |  | ₩ 19,426 |  | ₩ 20,040 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 19,426 |  | 20,040 |  | 16,495
Chuncheon Green Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 19,659 |  | ₩ 20,226 |  |
Effective percentage of ownership | [1] | 45.00% |  | 45.00% |  |
Share in net assets |  | ₩ 8,847 |  | ₩ 9,102 |  |
Investment differential |  | 53 |  | 53 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 8,900 |  | 9,155 |  | 3,372
Yeomsubong Wind Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 2,156 |  | ₩ 1,540 |  |
Effective percentage of ownership | [1] | 29.00% |  | 3.81% |  |
Share in net assets |  | ₩ 625 |  | ₩ 59 |  |
Investment differential |  | 246 |  | 3 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 871 | [18] | 62 | [19] | 95
Yeongyang Wind Power Corporation II |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 26,634 |  | ₩ 17,837 |  |
Effective percentage of ownership | [1] | 30.00% |  | 30.00% |  |
Share in net assets |  | ₩ 7,990 |  | ₩ 5,351 |  |
Investment differential |  | 2,110 |  | 2,110 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 10,100 |  | 7,461 |  | 7,965
Haeparang Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 8,339 |  | ₩ 8,673 |  |
Effective percentage of ownership | [1] | 25.00% |  | 25.00% |  |
Share in net assets |  | ₩ 2,084 |  | ₩ 2,168 |  |
Investment differential |  | 20 |  | 20 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 2,104 |  | 2,188 |  | 2,241
Saemangeum Sebit Power Plant Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 67,286 |  | ₩ 36,439 |  |
Effective percentage of ownership | [1] | 55.00% |  | 63.09% |  |
Share in net assets |  | ₩ 37,009 |  | ₩ 22,990 |  |
Investment differential |  | 182 |  | 209 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 37,191 | [20] | 23,199 | [21] | 6,000
Boulder Solar III, LLC |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 1,929 |  | ₩ 1,896 |  |
Effective percentage of ownership | [1] | 30.00% |  | 30.00% |  |
Share in net assets |  | ₩ 579 |  | ₩ 569 |  |
Investment differential |  | 175 |  | 175 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 754 |  | 744 |  |
PlatformN. Co., Ltd |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ (210) |  | ₩ 285 |  |
Effective percentage of ownership | [1] | 29.58% |  | 29.58% |  |
Share in net assets |  | ₩ (62) |  | ₩ 84 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 62 |  | 0 |  |
Book value |  | 0 |  | 84 |  | 0
PT. Cirebon Energi Prasarana |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 765,973 |  | ₩ 690,347 |  |
Effective percentage of ownership | [1] | 10.00% |  | 10.00% |  |
Share in net assets |  | ₩ 76,597 |  | ₩ 69,035 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 76,597 | [16] | 69,035 | [16] | 0
Green Radiation Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 226 |  | ₩ 77 |  |
Effective percentage of ownership | [1] | 10.00% |  | 10.00% |  |
Share in net assets |  | ₩ 23 |  | ₩ 8 |  |
Investment differential |  | 3 |  | 3 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value | [17] | 26 |  | 11 |  |
Future Convergence Technology Laboratory. Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 177 |  | ₩ 249 |  |
Effective percentage of ownership | [1] | 20.12% |  | 20.12% |  |
Share in net assets |  | ₩ 36 |  | ₩ 50 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 36 |  | 50 |  |
Eco motion Co., Ltd. (formerly, SC E&G. Co,. Ltd.) |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 1,335 |  | ₩ 1,068 |  |
Effective percentage of ownership | [1] | 20.00% |  | 20.00% |  |
Share in net assets |  | ₩ 267 |  | ₩ 214 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 267 |  | 214 |  | 0
REC's Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.) |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 720 |  | ₩ 828 |  |
Effective percentage of ownership | [1] | 16.67% |  | 20.00% |  |
Share in net assets |  | ₩ 120 |  | ₩ 166 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 120 | [14] | 166 |  | 0
ACE |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 37 |  | ₩ 100 |  |
Effective percentage of ownership | [1] | 20.00% |  | 20.00% |  |
Share in net assets |  | ₩ 7 |  | ₩ 20 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | (5) |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 2 |  | 20 |  | 0
Environment and Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 89 |  | ₩ 93 |  |
Effective percentage of ownership | [1] | 10.54% |  | 10.54% |  |
Share in net assets |  | ₩ 9 |  | ₩ 10 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 9 | [17] | 10 | [17] | 0
Santiago Solar Power SpA |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 23,538 |  | ₩ 26,748 |  |
Effective percentage of ownership | [1] | 50.00% |  | 50.00% |  |
Share in net assets |  | ₩ 11,769 |  | ₩ 13,373 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 11,769 |  | 13,373 |  | 0
Yanggu Floating Photovoltaic Power Plant Inc. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 2,622 |  | ₩ 3,115 |  |
Effective percentage of ownership | [1] | 29.00% |  | 29.00% |  |
Share in net assets |  | ₩ 760 |  | ₩ 903 |  |
Investment differential |  | 0 |  | 0 |  |
Intercompany transaction |  | 0 |  | 0 |  |
Others |  | 0 |  | 0 |  |
Book value |  | 760 |  | 903 |  | ₩ 0
Power Embedded |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 296 |  |  |  |
Effective percentage of ownership | [1] | 23.33% |  |  |  |
Share in net assets |  | ₩ 69 |  |  |  |
Investment differential |  | 1 |  |  |  |
Intercompany transaction |  | 0 |  |  |  |
Others |  | 0 |  |  |  |
Book value |  | 70 |  | 0 |  |
Changwon SG Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 4,089 |  |  |  |
Effective percentage of ownership | [1] | 18.78% |  |  |  |
Share in net assets |  | ₩ 768 |  |  |  |
Investment differential |  | 15 |  |  |  |
Intercompany transaction |  | 0 |  |  |  |
Others |  | 0 |  |  |  |
Book value |  | 783 | [17] | 0 |  |
Donpyung Technology. Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 1,396 |  |  |  |
Effective percentage of ownership | [1] | 20.00% |  |  |  |
Share in net assets |  | ₩ 279 |  |  |  |
Investment differential |  | 0 |  |  |  |
Intercompany transaction |  | (25) |  |  |  |
Others |  | 0 |  |  |  |
Book value |  | 254 |  | 0 |  |
HORANG ENERGY Inc. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 9,813 |  |  |  |
Effective percentage of ownership | [1] | 40.00% |  |  |  |
Share in net assets |  | ₩ 3,925 |  |  |  |
Investment differential |  | 224 |  |  |  |
Intercompany transaction |  | 0 |  |  |  |
Others |  | 0 |  |  |  |
Book value |  | 4,149 |  | 0 |  |
Hoenggye Renewable Energy Co., Ltd |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ (1,028) |  |  |  |
Effective percentage of ownership | [1] | 36.10% |  |  |  |
Share in net assets |  | ₩ (370) |  |  |  |
Investment differential |  | 2,270 |  |  |  |
Intercompany transaction |  | 0 |  |  |  |
Others |  | 475 |  |  |  |
Book value |  | 2,375 |  | 0 |  |
Haman Green Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 8,516 |  |  |  |
Effective percentage of ownership | [1] | 35.00% |  |  |  |
Share in net assets |  | ₩ 2,981 |  |  |  |
Investment differential |  | 0 |  |  |  |
Intercompany transaction |  | 0 |  |  |  |
Others |  | 0 |  |  |  |
Book value |  | 2,981 |  | 0 |  |
Songsan Green Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 13,754 |  |  |  |
Effective percentage of ownership | [1] | 60.00% |  |  |  |
Share in net assets |  | ₩ 8,252 |  |  |  |
Investment differential |  | 71 |  |  |  |
Intercompany transaction |  | 0 |  |  |  |
Others |  | 0 |  |  |  |
Book value |  | 8,323 | [22] | ₩ 0 |  |
Eumseong Eco Park Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 26,929 |  |  |  |
Effective percentage of ownership | [1] | 29.00% |  |  |  |
Share in net assets |  | ₩ 7,809 |  |  |  |
Investment differential |  | 577 |  |  |  |
Intercompany transaction |  | 0 |  |  |  |
Others |  | 0 |  |  |  |
Book value |  | 8,386 |  |  |  |
Changwon Nu-ri Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 13,154 |  |  |  |
Effective percentage of ownership | [1] | 61.00% |  |  |  |
Share in net assets |  | ₩ 8,024 |  |  |  |
Investment differential |  | 3 |  |  |  |
Intercompany transaction |  | 0 |  |  |  |
Others |  | 0 |  |  |  |
Book value |  | 8,027 |  |  |  |
PungBack Wind Farm Corporation |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 18,526 |  |  |  |
Effective percentage of ownership | [1] | 37.00% |  |  |  |
Share in net assets |  | ₩ 6,855 |  |  |  |
Investment differential |  | 1,085 |  |  |  |
Intercompany transaction |  | 0 |  |  |  |
Others |  | 0 |  |  |  |
Book value |  | 7,940 |  |  |  |
Trumbull Asset Management, LLC |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 1,200 |  |  |  |
Effective percentage of ownership | [1] | 78.00% |  |  |  |
Share in net assets |  | ₩ 936 |  |  |  |
Investment differential |  | 0 |  |  |  |
Intercompany transaction |  | 0 |  |  |  |
Others |  | 0 |  |  |  |
Book value |  | 936 |  |  |  |
S-Power Chile SpA |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ (150) |  |  |  |
Effective percentage of ownership | [1] | 50.00% |  |  |  |
Share in net assets |  | ₩ (75) |  |  |  |
Investment differential |  | 139 |  |  |  |
Intercompany transaction |  | 0 |  |  |  |
Others |  | 0 |  |  |  |
Book value |  | 64 |  |  |  |
Seungmun Green Energy |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 29,566 |  |  |  |
Effective percentage of ownership | [1] | 33.00% |  |  |  |
Share in net assets |  | ₩ 9,757 |  |  |  |
Investment differential |  | 0 |  |  |  |
Intercompany transaction |  | 0 |  |  |  |
Others |  | 0 |  |  |  |
Book value |  | 9,757 |  |  |  |
Seobusambo highway photovoltaics Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Net assets |  | ₩ 4,476 |  |  |  |
Effective percentage of ownership | [1] | 80.00% |  |  |  |
Share in net assets |  | ₩ 3,580 |  |  |  |
Investment differential |  | 0 |  |  |  |
Intercompany transaction |  | 0 |  |  |  |
Others |  | 0 |  |  |  |
Book value |  | ₩ 3,580 |  |  |  |
[1] | The percentage of ownership shown above is after considering the treasury stocks and others.
[2] | the Company is planning to sell its investments in YTN Co., Ltd. based on the resolution of the Board of Directors on November 23, 2022, but investments in YTN Co., Ltd. are not classified as assets held-for-sale as the Company hasn’t started the active selling procedures as of December 31, 2023.
[3] | The Company is planning to sell its investments in YTN Co., Ltd. based on the resolution of the Board of Directors on November 23, 2022, but investments in YTN Co., Ltd. are not classified as assets held-for-sale as the Company hasn't started the active selling procedures as of December 31, 2022.
[4] | The effective percentage of ownership is less than 20%. However, the Company can exercise significant influence by virtue of its contractual right to appoint directors to the board of directors of the entity, and by strict decision criteria of the Company’s financial and operating policy of the board of directors.
[5] | The effective percentage of ownership is 100%. However, the Government regulates the Company’s ability to make operating and financial decisions over the entity, as the Government requires maintaining arms-length transactions between KPX and the Company’s other subsidiaries. Accordingly, the entity is not classified as a consolidated subsidiary. The Company can exercise significant influence by virtue of right to nominate directors to the board of directors of the entity.
[6] | After additional acquisition of the shares, the effective percentage of ownership is more than 50%. However, the Company does not hold control over relevant business while it exercises significant influence by participating in the board of directors by the shareholders’ agreement. Accordingly, the entity is classified as an associate.
[7] | The effective percentage of ownership is more than 50%. However, by the shareholders’ agreement, the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision committee. Accordingly, the entity is classified as an associate.
[8] | The Company is planning to sell its investment in SPC Power Corporation, KEPCO SPC Power Corporation, and KV Holdings, Inc. The timing of and proceeds from such sales transaction is not specified as of December 31, 2022.
[9] | The Company is planning to sell its investment in SPC Power Corporation, KEPCO SPC Power Corporation, and KV Holdings, Inc. The timing of and proceeds from such sales transaction is not specified as of December 31, 2023.
[10] | The effective percentage of ownership is less than 20%. However, the Company can exercise significant influence by virtue of its contractual right to appoint one out of four members of the steering committee of the entity. Moreover, the Company has significant financial transactions, which can affect its significant influence on the entity.
[11] | The effective percentage of ownership changed due to the disproportionate capital reduction of financial investors during the year ended December 31, 2023.
[12] | The effective percentage of ownership is 34.01% considering the conversion of redeemable convertible preferred stock into ordinary stock.
[13] | The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.
[14] | Although the Company’s effective percentage of ownership is less than 20%, the Company can exercise significant influence on the entity through its contractual right to appoint one director to the entity’s board of directors.
[15] | Although the Company’s effective percentage of ownership is less than 20%, the entity has been classified as an associate as the Company has significant influence on the entity considering the fact that ordinary resolutions passed at the shareholders’ meeting require the majority decision and the Company has the right to elect the entity’s directors.
[16] | The effective percentage of ownership is less than 20%. However, the entity is classified as an associate because the Company exercises significant influence over the decisions related to finance and operation.
[17] | The effective percentage of ownership is less than 20%. However, the entity is classified as an associate because the Company exercises significant influence over the entity.
[18] | The effective percentage of ownership decreased due to the disproportionate paid-in capital increase.
[19] | The effective percentage of ownership decreased due to the disproportionate paid-in capital increase, and the effective percentage of ownership is less than 20%. However, the Company exercises significant influence over all decisions related to finance and operation.
[20] | The effective percentage of ownership decreased due to the disproportionate paid-in capital increase during the year ended December 31, 2023. The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.
[21] | The effective percentage of ownership decreased due to the disproportionate paid-in capital increase during the year ended December 31, 2022. The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.
[22] | The effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all ownership parties. Accordingly, the entity is classified as a joint venture.

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of investments in associates accounted for using the equity method. [Refer: Associates [member]; Investments accounted for using equity method] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_InvestmentsInAssociatesAccountedForUsingEquityMethod
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of assets less the amount of liabilities. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 1 -IssueDate 2023-01-01 -Paragraph IG63 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2023-en-r&anchor=para_IG63&doctype=Implementation%20Guidance -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_NetAssetsLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | kep_DifferentialOfInvestmentsInAssociates
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | kep_EffectivePercentageOfOwnershipAssociate
Namespace Prefix: | kep_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | kep_IncreaseDecreaseOfInvestmentsInAssociatesForOtherReasonsInConsolidatedFinancialStatements
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | kep_IntercompanyTransactionWithAssociates
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | kep_ShareOfNetAssetsOfAssociates
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_KoreaGasCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_KoreaElectricPowerIndustrialDevelopmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_YTNMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_GangwonWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_HyundaiGreenPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_KoreaPowerExchangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_TaebaekWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_TaebackGuinemiWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_DaeryunPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_KNHSolarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_SPCPowerCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_GemengInternationalEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_PTCirebonElectricPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_KNOCNigerianEastOilMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_KNOCNigerianWestOilMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_PTWampuElectricPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_PTBayanResourcesTBKMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_SPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_PioneerGasPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_EurasiaEnergyHoldingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_XePianXeNamnoyPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_PTMutiaraJawaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_SamcheokEcoMaterialsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_NoeulGreenEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_GoseongGreenPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_GangneungEcoPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_ShinPyeongtaekPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_HaengBokDoSiPhotovoltaicPowerCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_DongducheonDreamPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_JinbhuvishPowerGenerationPvtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_DaejungOffshoreWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_GSDonghaeElectricPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_DaeguPhotovoltaicMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_BusanGreenEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_GunsanBioEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_HansuwonKnpCoLtdFormerlyKoreaNuclearPartnersCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_KoreaElectricPowerCorporationFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_EnergyInfraAssetManagementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_DaegucleanEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_YaksuessCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_NepalWaterEnergyDevelopmentCompanyPrivateLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_GwangyangGreenEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_PNDSolarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_HyundaiEcoEnergyCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_YeongGwangYaksuWindElectricCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_GreenEnergyElectricityGenerationCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_KoreaEnergySolutionsCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_ITRCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_StnCo.Ltd.FormerlyStructureTestNetworkCo.Ltd.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_NamjeongsusangSolarPowerOperationCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_IndeckNilesDevelopmentLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_IndeckNilesAssetManagementLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_HanwhaCorporation-linkedSunlightPowerSpecialPrivateEquityInvestmentTrustNo1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_SuwonNewPowerCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_GwangbaekSolarPowerInvestmentCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_GoDeokCleanEnergyCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_SureDataLabCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_SEPCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_HankookElectricPowerInformationCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_TronixCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_O2BGlobalCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_MuanSunshineSolarPowerPlantCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_BigeumResidentPhotovoltaicPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_GoesanSolarParkCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_SaemangeumHeemangPhotovoltaicCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_BitgoelEcoEnergyCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_JejuGimnyeongWindPowerCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_SeoroseoroSunnyPowerPlantCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_MuanSolarParkCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_YuDangSolarCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_AnjwaSmartFarmSolarCityCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_DaewonGreenEnergyCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_GGuruCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_Ud4mCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_DongbuHighwaySolarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_SeobuHighwaySolarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_KoreaEnergyDataCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_GangneungSacheonFuelCellCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_KostureCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_TaebaekGadeoksanWindPowerCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_ChuncheonGreenEnergyCo.Ltd.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_YeomsubongWindPowerCo.Ltd.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_YeongyangWindPowerCorporationIiMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_HaeparangEnergyCo.Ltd.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_SaemangeumSebitPowerPlantCo.Ltd.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_BoulderSolarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_Platformn.Co.LtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_Pt.CirebonEnergiPrasaranaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_GreenRadiationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_FutureConvergenceTechnologyLaboratoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_ScEgMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_RecsInnovationCo.Ltd.FormerlyWangSanEngineering.Co.Ltd.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_AceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_EnvironmentAndEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_SantiagoSolarPowerSpaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_YangguFloatingPhotovoltaicPowerPlantIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_PowerEmbeddedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_ChangwonSgEnergyCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_DonpyungTechnologyCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_HorangEnergyIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_HoenggyeRenewableEnergyCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_HamanGreenEnergyCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_SongsanGreenEnergyCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_EumseongEcoParkMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_ChangwonNuriEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_PungbackWindFarmCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_TrumbullAssetManagementLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_SpowerChileSpaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_SeungmunGreenEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=kep_SeobusamboHighwayPhotovoltaicsCo.Ltd.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |