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Summary of financial information of consolidated subsidiaries (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Korea Hydro & Nuclear Power |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | ₩ 55,792,704 | ₩ 55,011,096 |
Total liabilities |  | 30,484,104 | 29,252,816 |
Sales |  | 8,858,717 | 9,415,751 |
Profit (loss) for the period |  | (137,613) | 854,346 |
Korea South-East Power |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 9,997,758 | 9,879,577 |
Total liabilities |  | 4,948,553 | 4,844,184 |
Sales |  | 5,521,038 | 5,387,846 |
Profit (loss) for the period |  | 25,736 | 130,371 |
Korea Midland Power |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 10,839,218 | 9,893,822 |
Total liabilities |  | 7,088,013 | 6,148,173 |
Sales |  | 4,368,467 | 4,167,009 |
Profit (loss) for the period |  | (38,142) | 104,591 |
Korea Western Power |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 9,902,752 | 9,660,426 |
Total liabilities |  | 5,965,410 | 5,739,534 |
Sales |  | 4,841,261 | 4,199,079 |
Profit (loss) for the period |  | (28,157) | 110,939 |
Korea Southern Power |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 9,810,985 | 9,648,741 |
Total liabilities |  | 5,463,721 | 5,401,216 |
Sales |  | 5,539,793 | 4,397,552 |
Profit (loss) for the period |  | 55,439 | 98,817 |
Korea East-West Power |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 8,744,380 | 8,855,518 |
Total liabilities |  | 4,092,460 | 4,204,187 |
Sales |  | 4,933,525 | 4,644,330 |
Profit (loss) for the period |  | 3,345 | 217,599 |
KEPCO Engineering & Construction Company |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 771,480 | 762,166 |
Total liabilities |  | 310,100 | 305,134 |
Sales |  | 433,701 | 490,193 |
Profit (loss) for the period |  | 12,937 | 21,222 |
KEPCO Plant Service & Engineering |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 1,275,365 | 1,195,086 |
Total liabilities |  | 296,428 | 294,689 |
Sales |  | 1,239,604 | 1,232,113 |
Profit (loss) for the period |  | 160,791 | 135,482 |
KEPCO Nuclear Fuel |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 817,416 | 792,187 |
Total liabilities |  | 434,439 | 421,088 |
Sales |  | 230,667 | 279,664 |
Profit (loss) for the period |  | 15,835 | 4,557 |
KEPCO KDN |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 566,807 | 524,520 |
Total liabilities |  | 159,423 | 155,715 |
Sales |  | 622,154 | 619,470 |
Profit (loss) for the period |  | 60,016 | 48,968 |
Garolim Tidal Power Plant |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 608 | 619 |
Total liabilities |  | 345 | 345 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (11) | (12) |
KEPCO International HongKong |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 140,101 | 153,529 |
Total liabilities |  | 1 | 1 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 3,307 | 4,380 |
KEPCO International Philippines |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 107,948 | 102,323 |
Total liabilities |  | 1,475 | 886 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 52,539 | 47,201 |
KEPCO Gansu International |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 12,047 | 11,567 |
Total liabilities |  | 515 | 493 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (24) | (29) |
KEPCO Philippines Holdings |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 188,551 | 127,922 |
Total liabilities |  | 9,775 | 2,621 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 53,219 | 43,218 |
KEPCO Philippines Corporation |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 6,394 | 6,293 |
Total liabilities |  | 213 | 114 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 54 | 2,098 |
KEPCO Ilijan Corporation |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 431,444 | 474,624 |
Total liabilities |  | 53,413 | 57,801 |
Sales |  | 99,844 | 109,183 |
Profit (loss) for the period |  | 49,631 | 66,320 |
KEPCO Lebanon SARL |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 1,509 | 1,069 |
Total liabilities |  | 9,686 | 9,281 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 413 | (219) |
KEPCO Neimenggu International |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 194,336 | 165,937 |
Total liabilities |  | 0 | 0 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 20,829 | 500 |
KEPCO Shanxi International |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 519,991 | 497,990 |
Total liabilities |  | 201,732 | 193,309 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 290 | 3,796 |
KOMIPO Global Pte |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 250,456 | 225,411 |
Total liabilities |  | 961 | 1,497 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 11,478 | 21,858 |
KEPCO Canada Energy |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  |  | 132 |
Total liabilities |  |  | 22 |
Profit (loss) for the period |  |  | (32) |
KEPCO Netherlands B.V. |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 130,460 | 114,911 |
Total liabilities |  | 77 | 49 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 26,550 | 17,309 |
KOREA Imouraren Uranium Investment Corp. |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 63,517 | 151,278 |
Total liabilities |  | 171 | 131 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (89,852) | 1,490 |
KEPCO Australia |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 439,719 | 466,654 |
Total liabilities |  | 14 | 569 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 49 | (568) |
KOSEP Australia |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 37,057 | 27,076 |
Total liabilities |  | 2,832 | 333 |
Sales |  | 20,294 | 12,096 |
Profit (loss) for the period |  | 7,315 | 1,601 |
KOMIPO Australia |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 39,066 | 31,441 |
Total liabilities |  | 4,659 | 4,691 |
Sales |  | 20,294 | 12,096 |
Profit (loss) for the period |  | 7,193 | 1,133 |
KOWEPO Australia |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 39,341 | 31,586 |
Total liabilities |  | 4,702 | 4,691 |
Sales |  | 20,294 | 12,096 |
Profit (loss) for the period |  | 7,316 | 1,232 |
KOSPO Australia |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 36,525 | 29,472 |
Total liabilities |  | 3,585 | 4,221 |
Sales |  | 20,294 | 12,096 |
Profit (loss) for the period |  | 9,520 | (2,759) |
KEPCO Middle East Holding Company |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 101,201 | 95,812 |
Total liabilities |  | 92,862 | 90,842 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 3,043 | 2,913 |
Qatrana Electric Power Company |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 484,383 | 460,206 |
Total liabilities |  | 326,486 | 327,401 |
Sales |  | 18,766 | 18,892 |
Profit (loss) for the period |  | 21,170 | 23,310 |
KHNP Canada Energy |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 49,776 | 51,994 |
Total liabilities |  | 35 | 31 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (26) | (92) |
KEPCO Bylong Australia |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 254,398 | 242,364 |
Total liabilities |  | 315,921 | 277,549 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (29,573) | 20,271 |
Korea Waterbury Uranium Limited Partnership |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 20,890 | 20,886 |
Total liabilities |  | 142 | 136 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (74) | (59) |
Korea Electric Power Nigeria |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 112 | 238 |
Total liabilities |  | 39 | 76 |
Sales |  | 727 | 2,164 |
Profit (loss) for the period |  | (93) | 29 |
KEPCO Holdings de Mexico |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 248 | 235 |
Total liabilities |  | 57 | 30 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (11) | (20) |
KST Electric Power Company |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 535,807 | 546,242 |
Total liabilities |  | 457,867 | 478,230 |
Sales |  | 109,735 | 120,126 |
Profit (loss) for the period |  | 10,274 | 16,154 |
KEPCO Energy Service Company |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 1,940 | 1,793 |
Total liabilities |  | 1,454 | 451 |
Sales |  | 5,117 | 6,773 |
Profit (loss) for the period |  | (232) | 976 |
KEPCO Netherlands S3 B.V. |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 46,642 | 46,642 |
Total liabilities |  | 53 | 53 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 2,382 | 2,382 |
PT. KOMIPO Pembangkitan Jawa Bali |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 11,405 | 11,261 |
Total liabilities |  | 5,472 | 4,769 |
Sales |  | 20,320 | 20,956 |
Profit (loss) for the period |  | 3,925 | 4,666 |
PT. Cirebon Power Service |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 1,588 | 2,808 |
Total liabilities |  | 273 | 155 |
Sales |  | 7,228 | 7,439 |
Profit (loss) for the period |  | 177 | 592 |
KOWEPO International Corporation |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 0 | 0 |
Total liabilities |  | 8 | 8 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 0 | (2) |
KOSPO Jordan |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 16,315 | 24,077 |
Total liabilities |  | 3,432 | 13,594 |
Sales |  | 34,371 | 7,331 |
Profit (loss) for the period |  | 1,907 | 953 |
EWP Philippines Corporation |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 1,684 | 1,708 |
Total liabilities |  | 829 | 836 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (11) | (17) |
EWP America |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets | [1] | 72,525 | 79,854 |
Total liabilities | [1] | 4,903 | 67,308 |
Sales | [1] | 29,557 | 23,543 |
Profit (loss) for the period | [1] | (4,483) | (9,737) |
KNF Canada Energy Limited |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 1,801 | 1,884 |
Total liabilities |  | 20 | 31 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (45) | (43) |
PT KEPCO Resource Indonesia |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  |  | 491 |
Total liabilities |  |  | 0 |
Sales |  |  | 0 |
Profit (loss) for the period |  |  | (311) |
EWP Barbados 1 SRL |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 268,033 | 235,096 |
Total liabilities |  | 1,581 | 450 |
Sales |  | 688 | 0 |
Profit (loss) for the period |  | 11,221 | (2,585) |
Gyeonggi Green Energy |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 293,812 | 282,408 |
Total liabilities |  | 185,043 | 199,160 |
Sales |  | 96,442 | 95,192 |
Profit (loss) for the period |  | 25,121 | 3,203 |
PT. Tanggamus Electric Power |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 216,321 | 179,317 |
Total liabilities |  | 187,502 | 160,144 |
Sales |  | 26,832 | 34,281 |
Profit (loss) for the period |  | 9,338 | 4,640 |
Gyeongju Wind Power |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 122,303 | 112,279 |
Total liabilities |  | 83,348 | 82,124 |
Sales |  | 21,906 | 7,219 |
Profit (loss) for the period |  | 8,803 | 2,400 |
KOMIPO America |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 10,092 | 10,505 |
Total liabilities |  | 572 | 521 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (885) | 2,071 |
KOSEP USA INC. |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 1 | 184 |
Total liabilities |  | 4,857 | 9,065 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 4,341 | 26,997 |
PT. EWP Indonesia |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 7,444 | 2,035 |
Total liabilities |  | 14 | 23 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 3,138 | 1,916 |
KEPCO Netherlands J3 B.V. |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 115,978 | 122,612 |
Total liabilities |  | 77 | 76 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (104) | 12,115 |
Korea Offshore Wind Power |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 216,114 | 190,195 |
Total liabilities |  | 36,377 | 1,985 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (8,473) | (6,997) |
Global One Pioneer B.V. |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 162 | 151 |
Total liabilities |  | 87 | 38 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (113) | (80) |
Global Energy Pioneer B.V. |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 325 | 309 |
Total liabilities |  | 74 | 41 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (102) | (87) |
Mira Power Limited |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 277,525 | 208,150 |
Total liabilities |  | 213,104 | 163,198 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (980) | 737 |
KOSEP Material |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 2,862 | 2,751 |
Total liabilities |  | 1,249 | 1,448 |
Sales |  | 3,240 | 3,128 |
Profit (loss) for the period |  | 377 | 320 |
Commerce and Industry Energy |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 92,872 | 99,129 |
Total liabilities |  | 88,009 | 87,926 |
Sales |  | 27,937 | 30,577 |
Profit (loss) for the period |  | (6,091) | (749) |
KEPCO Singapore Holdings Pte. |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 582 | 3,265 |
Total liabilities |  | 9 | 4 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (31) | (24) |
KOWEPO India Private Limited |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  |  | 781 |
Total liabilities |  |  | 0 |
Sales |  |  | 0 |
Profit (loss) for the period |  |  | (46) |
KEPCO KPS Philippines Corp. |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 7,501 | 6,636 |
Total liabilities |  | 358 | 235 |
Sales |  | 4,815 | 6,840 |
Profit (loss) for the period |  | 766 | 555 |
KOSPO Chile SpA |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 139,814 | 133,570 |
Total liabilities |  | 57,502 | 50,109 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 1,016 | 1,066 |
PT. KOWEPO Sumsel Operation and Maintenance Services |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 1,313 | 1,350 |
Total liabilities |  | 394 | 279 |
Sales |  | 4,343 | 7,651 |
Profit (loss) for the period |  | (654) | 659 |
HeeMang Sunlight Power |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 10,915 | 6,876 |
Total liabilities |  | 7,626 | 3,395 |
Sales |  | 146 | 105 |
Profit (loss) for the period |  | (192) | (229) |
Fujeij Wind Power Company |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 217,796 | 165,636 |
Total liabilities |  | 212,435 | 156,099 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (1,033) | 8,836 |
KOSPO Youngnam Power |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 413,472 | 412,785 |
Total liabilities |  | 325,589 | 333,302 |
Sales |  | 369,669 | 68,973 |
Profit (loss) for the period |  | 8,155 | 939 |
HI Carbon Professional Private Special Asset Investment Trust 1 |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 3,002 | 3,002 |
Total liabilities |  | 0 | 0 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 12 | 12 |
Chitose Solar Power Plant LLC |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 115,505 | 136,098 |
Total liabilities |  | 105,079 | 121,622 |
Sales |  | 15,022 | 7,083 |
Profit (loss) for the period |  | 872 | 4,100 |
KEPCO Energy Solution |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 304,103 | 313,401 |
Total liabilities |  | 849 | 12,376 |
Sales |  | 5,584 | 5,544 |
Profit (loss) for the period |  | 2,532 | 1,325 |
Solar School Plant |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 204,282 | 201,482 |
Total liabilities |  | 1,366 | 599 |
Sales |  | 1,149 | 67 |
Profit (loss) for the period |  | 2,033 | 874 |
KOSPO Power Services Limitada |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 3,045 | 3,901 |
Total liabilities |  | 596 | 887 |
Sales |  | 9,610 | 11,067 |
Profit (loss) for the period |  | 1,132 | 666 |
Energy New Industry Specialized Investment Private Investment Trust |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets | [2] | 66,498 | 506,207 |
Total liabilities | [2] | 1,014 | 2,118 |
Sales | [2] | 0 | 0 |
Profit (loss) for the period | [2] | (1,140) | 52 |
KOEN Bylong |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 5,544 | 5,875 |
Total liabilities |  | 26 | 0 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (10) | 0 |
KOMIPO Bylong |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 5,544 | 5,875 |
Total liabilities |  | 26 | 0 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (25) | 0 |
KOWEPO Bylong |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 5,544 | 5,875 |
Total liabilities |  | 26 | 0 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 0 | 0 |
KOSPO Bylong |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 5,544 | 5,875 |
Total liabilities |  | 26 | 0 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (25) | 0 |
EWP Bylong |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 5,544 | 5,875 |
Total liabilities |  | 26 | 0 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (15) | 0 |
KOWEPO Lao International |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 3,800 | 3,259 |
Total liabilities |  | 1,015 | 1,452 |
Sales |  | 2,899 | 3,624 |
Profit (loss) for the period |  | 895 | 1,881 |
KEPCO US |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 16,640 | 16,913 |
Total liabilities |  | 0 | 0 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 6 | 0 |
KEPCO Alamosa |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 32,346 | 33,144 |
Total liabilities |  | 79 | 492 |
Sales |  | 750 | 0 |
Profit (loss) for the period |  | (688) | (218) |
Cogentrix Solar Services |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 64,223 | 84,458 | [3]
Total liabilities |  | 48,819 | 53,116 | [3]
Sales |  | 9,015 | 8,958 | [3]
Profit (loss) for the period |  | 200 | (112) | [3]
KEPCO-LG CNS Mangilao Holdings |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 25,642 | 24,131 |
Total liabilities |  | 27,197 | 24,395 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (1,144) | (278) |
Mangilao Investment |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 25,641 | 24,131 |
Total liabilities |  | 0 | 0 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | 0 | 0 |
KEPCO-LG CNS Mangilao Solar |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 25,406 | 24,002 |
Total liabilities |  | 146 | 134 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (104) | (278) |
Jeju Hanlim Offshore Wind Co |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 16,557 | 36 |
Total liabilities |  | 328 | 0 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (925) | 0 |
PT. Siborpa Eco Power |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 12,363 | 11,562 |
Total liabilities |  | 141 | 214 |
Sales |  | 0 | 0 |
Profit (loss) for the period |  | (1,771) | ₩ (518) |
PT. Korea Energy Indonesia |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 1,183 |  |
Total liabilities |  | 60 |  |
Sales |  | 1,459 |  |
Profit (loss) for the period |  | 223 |  |
KOLAT SpA |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 38,362 |  |
Total liabilities |  | 474 |  |
Sales |  | 585 |  |
Profit (loss) for the period |  | (186) |  |
KEPCO California, LLC |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 42,171 |  |
Total liabilities |  | 21 |  |
Sales |  | 0 |  |
Profit (loss) for the period |  | (332) |  |
KEPCO Mojave Holdings, LLC |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 103,189 |  |
Total liabilities |  | 65,730 |  |
Sales |  | 0 |  |
Profit (loss) for the period |  | (3,959) |  |
Incheon Fuel Cell Co., Ltd. |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 23,626 |  |
Total liabilities |  | 415 |  |
Sales |  | 0 |  |
Profit (loss) for the period |  | (201) |  |
KOEN Service Co., Ltd. |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 583 |  |
Total liabilities |  | 31 |  |
Sales |  | 0 |  |
Profit (loss) for the period |  | (48) |  |
KOMIPO Service Co., Ltd. |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 576 |  |
Total liabilities |  | 17 |  |
Sales |  | 0 |  |
Profit (loss) for the period |  | (41) |  |
KOWEPO Service Co., Ltd. |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 750 |  |
Total liabilities |  | 227 |  |
Sales |  | 0 |  |
Profit (loss) for the period |  | (77) |  |
KOSPO Service Co., Ltd |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 576 |  |
Total liabilities |  | 6 |  |
Sales |  | 0 |  |
Profit (loss) for the period |  | (30) |  |
EWP Service Co., Ltd. |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 667 |  |
Total liabilities |  | 97 |  |
Sales |  | 0 |  |
Profit (loss) for the period |  | (30) |  |
PT. KOMIPO Energy Indonesia |  |  |  |
Disclosure - Summary of financial information of consolidated subsidiaries [Line Items] |  |  |  |
Total assets |  | 2,236 |  |
Total liabilities |  | 0 |  |
Sales |  | 0 |  |
Profit (loss) for the period |  | ₩ 0 |  |
[1] | Financial information of EWP America Inc. includes that of six other subsidiaries, EWP Renewable Corporation, DG Fairhaven Power, LLC, DG Whitefield, LLC, Springfield Power, LLC, California Power Holdings, LLC, and EWPRC Biomass Holdings, LLC.
[2] | Financial information of Energy New Industry Specialized Investment Private Investment Trust includes that of three other subsidiaries, BSK E-New Industry Fund VII, e-New Industry LB Fund 1 and Songhyun e-New Industry Fund.
[3] | Financial information of Cogentrix Solar Services, LLC includes that of two other subsidiaries, Solar Investments I, LLC and KEPCO Solar of Alamosa, LLC (formerly, Cogentrix of Alamosa, LLC).

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