XML 269 R257.htm IDEA: XBRL DOCUMENT
v3.22.1

Related Parties - Summary of Transactions Between Related Parties (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Dongducheon Dream Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | ₩ 19,923 | ₩ 7,757 | ₩ 7,071
Electricity purchase | 750,148 | 552,692 | 689,510
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 6,282 | 388 |
Trade payables | 114,613 | 65,794 |
Non-trade receivables and others | 493 | 213 |
Korea Gas Corporation |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 96,362 | 97,685 | 116,484
Purchase of power generation fuel | 5,646,713 | 3,270,972 | 4,049,486
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 10,015 | 9,969 |
Trade payables | 800,509 | 428,763 |
Non-trade receivables and others | 187 | 95 |
Non-trade payables and others | 759 | 617 |
Daejung Offshore Wind Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 46 | 32 | 1
Outstanding balances for related party transactions [abstract] |  |  |
Non-trade receivables and others | 77 | 31 |
Daegu Photovoltaic Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 207 | 325 | 327
REC purchase | 3,532 | 3,313 | 3,626
Outstanding balances for related party transactions [abstract] |  |  |
Trade payables | 115 | 57 |
Haeng Bok Do Si Photovoltaic Power Co Ltd |  |  |
Disclosure of transactions between related parties [line items] |  |  |
REC purchase | 393 | 370 | 450
Korea Electric Power Industrial Development Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service sales | 11,208 | 10,833 | 11,085
Electricity metering service fee | 241,925 | 212,366 | 245,057
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 269 | 508 |
Trade payables | 873 | 133 |
Non-trade receivables and others | 15 | 16 |
Non-trade payables and others | 5,880 | 3,779 |
Goseong Green Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 514,470 | 47,701 | 19,245
Electricity purchase | 987,540 | 0 | 32
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 495 | 2,181 |
Trade payables | 218,627 |  |
Non-trade receivables and others | 76,855 | 9,214 |
Non-trade payables and others | 59,987 | 64,986 |
Gangneung Eco Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service sales | 14,200 | 10,178 | 7,446
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 826 | 661 |
Non-trade receivables and others | 465 | 146 |
Non-trade payables and others | 97 |  |
Shin Pyeongtaek Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 23,501 | 20,791 | 21,218
Electricity purchase | 653,306 | 520,737 | 119,162
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 1,788 | 1,348 |
Trade payables | 79,828 | 47,948 |
Non-trade receivables and others | 3,116 | 2,823 |
Non-trade payables and others | 99 | 85 |
Noeul Green Energy Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 30 | 30 | 30
REC purchase | 10,014 | 10,634 | 22,767
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 3 | 3 |
Non-trade receivables and others | 1,169 | 969 |
Samcheok Eco Materials Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 620 | 700 | 627
Electricity purchase | 13,612 | 10,713 | 9,425
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 52 | 47 |
YTN Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 1,922 | 1,805 | 2,257
Service purchase | 388 | 353 | 333
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 99 | 97 |
Busan Green Energy Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 49 | 34 | 18
Electricity purchase | 18,996 | 18,678 | 13,811
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 1 | 5 |
Non-trade receivables and others | 20,658 | 13,946 |
Gunsan Bio Energy Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 20 | 102 | 4,755
Electricity purchase | 0 | 24 | 3,022
Outstanding balances for related party transactions [abstract] |  |  |
Non-trade receivables and others | 11,728 |  |
Korea Electric Vehicle Charging Service |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 3,059 | 1,956 | 1,029
Service purchase | 393 | 581 | 536
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 193 | 141 |
Non-trade receivables and others | 120 | 281 |
Yaksu ESS Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service purchase | 1,715 | 217 | 1,191
Outstanding balances for related party transactions [abstract] |  |  |
Trade payables | 1,374 | 739 |
Gangwon Wind Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 1,865 | 2,109 | 2,433
Electricity purchase | 19,623 | 23,350 | 24,116
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 8 | 6 |
Trade payables | 4,293 | 2,678 |
Gwangyang Green Energy Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 486 | 23 | 122
Outstanding balances for related party transactions [abstract] |  |  |
Non-trade receivables and others | 532 | 1,356 |
Bigeum Resident Photovoltaic Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 755 | 85 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 922 |  |
Hyundai Green Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Design service | 11,934 | 17,257 | 13,106
Electricity purchase | 0 | 349,778 | 507,662
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 229 | 554 |
Trade payables |  | 9,825 |
Korea Power Exchange |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service sales | 39,796 | 25,919 | 7,670
Trading fees | 86,716 | 87,361 | 120,509
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 627 | 1,608 |
Trade payables |  | 1,362 |
Non-trade receivables and others | 1,300 | 24 |
Non-trade payables and others | 2,189 | 70,456 |
Taebaek Wind Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service sales | 44 | 226 | 991
Electricity purchase | 5,930 | 4,003 | 7,070
Outstanding balances for related party transactions [abstract] |  |  |
Trade payables | 560 | 443 |
Non-trade receivables and others |  | 1,405 |
Non-trade payables and others | 262 |  |
Taeback Guinemi Wind Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 26 | 37 | 77
Electricity purchase | 5,910 | 5,023 | 349
Taebaek Guinemi Wind Power Co., Ltd |  |  |
Outstanding balances for related party transactions [abstract] |  |  |
Trade payables | 670 | 413 |
Non-trade payables and others |  | 509 |
Pyeongchang Wind Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 1,180 | 2,064 | 1,189
Electricity purchase | 4,099 | 3,969 | 5,188
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 4 | 3 |
Daeryun Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 1,944 | 1,947 | 1,879
Electricity purchase | 157,234 | 99,523 | 144,862
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 213 | 189 |
Trade payables | 21,362 | 16,079 |
Changjuk Wind Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 463 | 2,067 | 927
Electricity purchase | 6,213 | 6,084 | 6,994
Outstanding balances for related party transactions [abstract] |  |  |
Trade payables | 724 | 461 |
Non-trade payables and others | 295 | 309 |
GS Donghae Electric Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 21,127 | 31,557 | 15,792
Electricity purchase | 760,377 | 660,351 | 681,379
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 383 | 386 |
Trade payables | 113,529 | 91,213 |
Non-trade receivables and others | 272 | 321 |
Non-trade payables and others | 17 | 36 |
KNH Solar Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 14 | 16 | 17
Electricity purchase | 3,222 | 3,564 | 3,377
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 1 | 1 |
Trade receivables | 82 | 137 |
Trade payables |  | 14 |
Non-trade payables and others |  | 187 |
S-Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service sales | 5,229 | 6,682 | 6,535
Electricity purchase | 608,530 | 293,515 | 522,469
Outstanding balances for related party transactions [abstract] |  |  |
Trade payables | 91,277 | 23,415 |
Non-trade receivables and others | 48 | 46 |
PND Solar Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 416 | 409 | 407
Electricity purchase | 5,502 | 5,234 | 557
Outstanding balances for related party transactions [abstract] |  |  |
Trade payables |  | 58 |
Hyundai Ecoenergy Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 187 | 167 | 117
Electricity purchase | 25,762 | 17,777 | 6,810
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 19 | 16 |
Trade payables | 732 |  |
YeongGwang Yaksu Wind Electric Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 78 | 77 | 81
Electricity purchase | 11,729 | 9,151 | 6,511
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 6 | 8 |
Korea Energy Solution Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 2 | 7 | 52
Electricity purchase | 0 | 0 | 15
Gwangbaek Solar Power Investment Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity purchase | 742 | 373 | 0
Green Energy Electricity Generation Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 0 | 14 | 0
Electricity purchase | 1,238 | 0 | 0
Namjeongsusang Solar Power Operation Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 22 | 14 | 0
Electricity purchase | 14,286 | 0 | 0
Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1 |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service sales | 399 | 291 | 0
Muan Solar Park Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 232 | 57 | 0
Electricity purchase | 31,017 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables |  | 24 |
Non-trade receivables and others | 23 |  |
Go deok Clean Energy Co., Ltd |  |  |
Outstanding balances for related party transactions [abstract] |  |  |
Non-trade receivables and others |  | 1 |
Suwon New Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 1,820 | 2,974 | 5,606
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables |  | 2 |
Non-trade receivables and others | 1,198 | 712 |
Muan Sunshine Solar Power Plant Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 52 | 30 | 0
Electricity purchase | 15,900 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Trade payables | 1,748 |  |
Nine Associates (Overseas) |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales and others | 125,723 | 66,755 | 98,450
Haeng Bok Do Si Photovoltaic Power |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 2 | 2 | 2
Energy Infra Asset Management Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 4,629 | 0 | 0
Service sales | 2,657 | 0 | 0
Taebaek Gadeoksan Wind Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 295 | 0 | 0
Electricity purchase | 16,360 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Trade payables | 8,397 |  |
Non-trade receivables and others | 119 |  |
Non-trade payables and others | 1,571 |  |
ITR Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service sales | 3 | 0 | 0
Structure test network Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service sales | 5 | 0 | 0
Bitgoel Eco Energy Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 282 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Non-trade receivables and others | 27 |  |
Anjwa Smart Farm & Solar City Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 624 | 0 | 0
Electricity purchase | 24,601 | 0 | 0
Daewon Green Energy Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 155 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Non-trade receivables and others | 94 |  |
Saemangeum Heemang Photovoltaic Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 13 | 0 | 0
UD four M Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 4 | 0 | 0
Dongbu Highway Solar Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 5 | 0 | 0
Electricity purchase | 2,605 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 1 |  |
Trade payables | 98 |  |
Non-trade payables and others | 90 |  |
Seobu Highway Solar Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 8 | 0 | 0
Electricity purchase | 2,936 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Trade payables | 177 |  |
Non-trade payables and others | 105 |  |
SureDataLab Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 1 | 0 | 0
Hankook Electric Power Information Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 1 | 0 | 0
KOSTURE Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 1 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 1 |  |
Goesan Solar park Co., Ltd |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity purchase | 6,209 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Trade payables | 73 |  |
Jeju Gimnyeong Wind Power Co., Ltd |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity purchase | 12,833 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Trade payables | 885 |  |
Seoroseoro Sunny Power Plant Co Ltd |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity purchase | 217 | 0 | 0
YuDang Solar Co., Ltd |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity purchase | 3,495 | 0 | 0
One Associates (Overseas) |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity purchase | 502 | 0 | 0
Four Associates (Overseas) |  |  |
Outstanding balances for related party transactions [abstract] |  |  |
Non-trade receivables and others | 3,196 | 3,248 |
Non-trade payables and others | 502 |  |
Naepo Green Energy Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 467 | 217 | 154
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 42 | 56 |
Cheongna Energy Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service sales | 16,469 | 13,791 | 9,922
Electricity purchase | 57 | 66 | 58,747
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 4,164 | 1,592 |
Non-trade receivables and others | 1,350 | 1,186 |
Non-trade payables and others | 1 |  |
Dayone Energy Co., Ltd. (formerly, Hyundai Energy Co., Ltd.) |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service sales | 8,159 | 4,816 | 3,437
Electricity purchase | 5,409 | 1,120 | 2,847
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 52 | 57 |
Trade payables | 1,009 | 10 |
Non-trade receivables and others | 13,297 | 11,749 |
Non-trade payables and others | 11,306 | 9,119 |
Daegu Green Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 1,053 | 1,285 | 1,151
Electricity purchase | 289,052 | 215,224 | 296,464
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 71 | 44 |
Trade payables | 35,766 | 26,213 |
Non-trade receivables and others | 55 | 55 |
KAPES, Inc. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Commission | 413 | 476 | 504
Service purchase | 64,140 | 219,673 | 142,511
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 2 | 2 |
Non-trade receivables and others |  | 5,172 |
Non-trade payables and others | 2,121 | 20,577 |
Honam Wind Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 71 | 502 | 657
Electricity purchase | 4,807 | 4,382 | 5,306
Outstanding balances for related party transactions [abstract] |  |  |
Trade payables | 575 | 216 |
Non-trade payables and others |  | 345 |
Jeongam Wind Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 588 | 1,213 | 1,198
Electricity purchase | 3,145 | 5,982 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Non-trade receivables and others |  | 162 |
Non-trade payables and others |  | 692 |
Korea Power Engineering Service Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service sales | 339 | 203 | 348
Service purchase | 1,315 | 1,594 | 1,774
Outstanding balances for related party transactions [abstract] |  |  |
Non-trade receivables and others | 48 | 43 |
Seokmun Energy Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service sales | 1,701 | 1,932 | 1,495
Electricity purchase | 44,315 | 33,164 | 26,370
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 34 | 62 |
Trade payables | 7,941 | 4,898 |
Non-trade receivables and others | 149 | 9,460 |
Non-trade payables and others |  | 9,559 |
Incheon New Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Construction revenue | 14 | 14 | 354
Chun-cheon Energy Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 2,329 | 2,657 | 2,397
Electricity purchase | 327,536 | 222,069 | 313,471
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 126 | 98 |
Trade payables | 41,410 | 27,428 |
Non-trade receivables and others | 167 | 165 |
Yeonggwangbaeksu Wind Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 1,836 | 1,788 | 1,744
Electricity purchase | 9,471 | 11,232 | 11,739
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 6 | 8 |
Trade payables | 1,099 | 405 |
Non-trade receivables and others | 53 | 159 |
Non-trade payables and others |  | 1,747 |
Yeonggwang Wind Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 818 | 793 | 705
Electricity purchase | 21,004 | 24,103 | 11,940
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 10 | 12 |
Trade payables | 730 | 886 |
Non-trade receivables and others | 59 | 54 |
Non-trade payables and others |  | 3,038 |
Sam-Yang Photovoltaic Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 1,920 | 33 | 0
Electricity purchase | 5,852 | 3,848 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 5 | 5 |
Non-trade payables and others |  | 625 |
NH-Amundi Global Infrastructure Investment Private Investment Trust 21 |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service sales | 1,727 | 1,388 | 0
KW Nuclear Components Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service sales | 2,598 | 1,639 | 721
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables |  | 4 |
KEPCO-Uhde Inc. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 10 | 8 | 15
Outstanding balances for related party transactions [abstract] |  |  |
Non-trade payables and others | 10 |  |
Busan Shinho Solar Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 376 | 353 | 452
REC purchase | 7,895 | 7,296 | 7,843
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 2 | 2 |
Trade payables | 281 | 135 |
Non-trade payables and others |  | 780 |
Global Trade Of Power System Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service purchase | 323 | 337 | 502
Outstanding balances for related party transactions [abstract] |  |  |
Non-trade payables and others | 7 |  |
Expressway Solar-light Power Generation Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
REC purchase | 3,146 | 2,472 | 3,067
Outstanding balances for related party transactions [abstract] |  |  |
Trade payables | 102 |  |
Daesan Green Energy Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 523 | 703 | 39
Electricity purchase | 146,776 | 104,854 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 11 | 11 |
Trade payables | 5,120 | 7,694 |
Non-trade receivables and others | 120 | 216 |
Taebaek Gadeoksan Wind Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 2 | 3 | 0
Electricity purchase | 5,080 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Trade payables |  | 2,473 |
Non-trade receivables and others |  | 5 |
Non-trade payables and others |  | 5 |
Cheong-Song Noraesan Wind Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 30 | 29 | 6
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 2 | 2 |
Saemangeum Solar Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service sales | 1,141 | 2,846 | 2,230
Electricity purchase | 5 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Non-trade receivables and others | 4,268 | 3,141 |
Jaeun Resident Wind Power Plant Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 0 | 0 | 105
Dangjin Eco Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 32 | 33 | 4
Electricity purchase | 4,139 | 3,953 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 3 | 3 |
Trade payables | 276 | 326 |
Bitsolar Energy Co., Ltd., |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 296 | 42 | 0
Electricity purchase | 5,703 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Non-trade receivables and others | 7 |  |
Non-trade payables and others | 54 |  |
Busan Industrial Solar Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity purchase | 2,815 | 19 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 1 |  |
Trade payables | 54 | 1 |
Non-trade payables and others | 24 |  |
Haemodum Solar Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 6 | 4 | 0
Electricity purchase | 1,625 | 967 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 1 |  |
Yeongam Solar Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 339 | 165 | 0
Electricity purchase | 47,805 | 32,208 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 29 | 26 |
Trade payables | 3,324 | 14,652 |
Solaseado Solar Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 2,890 | 66 | 0
Electricity purchase | 31,031 | 28,516 | 0
Chungsongmeon BongSan wind power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 1 | 0 | 0
Energyco Co., Ltd. (formerly, Energyco LLC) |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 1 | 0 | 0
Busan Industrial Solar Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 9 | 0 | 0
Omisan Wind Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 1 | 0 | 0
Electricity purchase | 7 | 0 | 0
Thirty five Joint ventures (Overseas) |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales and others | 773,289 | 831,596 | 1,275,279
KW Nuclear Components Co., Ltd |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Service sales | 96 | 0 | 0
Samsu Wind Power Co., Ltd. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity purchase | 2,800 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |
Trade payables | 1,300 |  |
Five Joint ventures (Overseas) |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity purchase and Others | 49,055 | 14,767 | 7,232
Eighteen Joint ventures (Overseas) |  |  |
Outstanding balances for related party transactions [abstract] |  |  |
Trade receivables | 84,150 | 58,839 |
Non-trade receivables and others | 26,060 | 17,217 |
Non-trade payables and others | 22,050 | 105,682 |
Korea Development Bank |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Electricity sales | 4,177 | 4,248 | 3,948
Dividend paid | 256,862 | 17 | 20
Interest income | 756 | 3,461 | 2,091
Interest expense | 2,756 | 3,872 | ₩ 4,063
Outstanding balances for related party transactions [abstract] |  |  |
Non-trade receivables and others | 420,732 | 206,916 |
Non-trade payables and others | 21,172 | 123 |
Accrued interest income | 154 | 51 |
Derivative assets | ₩ 59,139 | 20,167 |
Derivative liabilities |  | ₩ 20,001 |

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_DisclosureOfTransactionsBetweenRelatedPartiesLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_OutstandingBalancesForRelatedPartyTransactionsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of goods purchased by the entity in related party transactions. [Refer: Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 24 -IssueDate 2021-01-01 -Paragraph 21 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2021-en-r&anchor=para_21_a&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_PurchasesOfGoodsRelatedPartyTransactions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of revenue arising from the rendering of services in related party transactions. [Refer: Revenue; Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 24 -IssueDate 2021-01-01 -Paragraph 21 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2021-en-r&anchor=para_21_c&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_RevenueFromRenderingOfServicesRelatedPartyTransactions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of revenue arising from the sale of goods in related party transactions. [Refer: Revenue; Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 24 -IssueDate 2021-01-01 -Paragraph 21 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2021-en-r&anchor=para_21_a&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_RevenueFromSaleOfGoodsRelatedPartyTransactions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of services received in related party transactions. [Refer: Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 24 -IssueDate 2021-01-01 -Paragraph 21 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2021-en-r&anchor=para_21_c&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_ServicesReceivedRelatedPartyTransactions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amounts accrued interest income related party transactions. + References No definition available. + Details
Name: | kep_AmountsAccruedInterestIncomeRelatedPartyTransactions
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amounts derivative assets related party transactions. + References No definition available. + Details
Name: | kep_AmountsDerivativeAssetsRelatedPartyTransactions
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amounts derivative liabilities related party transactions. + References No definition available. + Details
Name: | kep_AmountsDerivativeLiabilitiesRelatedPartyTransactions
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amounts non-trade payable related party transactions. + References No definition available. + Details
Name: | kep_AmountsNonTradePayableRelatedPartyTransactions
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amounts non-trade receivable related party transactions. + References No definition available. + Details
Name: | kep_AmountsNonTradeReceivableRelatedPartyTransactions
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amounts trade payable related party transactions. + References No definition available. + Details
Name: | kep_AmountsTradePayableRelatedPartyTransactions
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amounts Trade Receivable Related Party Transaction. + References No definition available. + Details
Name: | kep_AmountsTradeReceivableRelatedPartyTransaction
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amounts trade receivable related party transactions. + References No definition available. + Details
Name: | kep_AmountsTradeReceivableRelatedPartyTransactions
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Electricity metering service received related party transactions. + References No definition available. + Details
Name: | kep_ElectricityMeteringServiceReceivedRelatedPartyTransactions
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Electricity purchase and others. + References No definition available. + Details
Name: | kep_ElectricityPurchaseAndOthers
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Electricity sales and others. + References No definition available. + Details
Name: | kep_ElectricitySalesAndOthers
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Interest expense from related party transactions. + References No definition available. + Details
Name: | kep_InterestExpenseFromRelatedPartyTransactions
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Interest income from related party transactions. + References No definition available. + Details
Name: | kep_InterestIncomeFromRelatedPartyTransactions
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Purchases of power generation fuel related party transactions. + References No definition available. + Details
Name: | kep_PurchasesOfPowerGenerationFuelRelatedPartyTransactions
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Purchases Of REC related party transactions. + References No definition available. + Details
Name: | kep_PurchasesOfRECRelatedPartyTransactions
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Revenue from commission related party transactions. + References No definition available. + Details
Name: | kep_RevenueFromCommissionRelatedPartyTransactions
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Revenue from construction commitments related party transactions. + References No definition available. + Details
Name: | kep_RevenueFromConstructionCommitmentsRelatedPartyTransactions
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Revenue from sale of goods and design service fee related party transactions. + References No definition available. + Details
Name: | kep_RevenueFromSaleOfGoodsAndDesignServiceFeeRelatedPartyTransactions
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Trading received related party transactions. + References No definition available. + Details
Name: | kep_TradingReceivedRelatedPartyTransactions
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

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

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

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

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

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

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

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

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

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

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

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

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

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_KoreaElectricVehicleChargeServiceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_YaksuESSLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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

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

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_TaebaekGuinemiWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_PyeongchangWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_ChangjukWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_NineAssociatesOverseasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_HaengBokDoSiPhotovoltaicPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_TaebaekGadeoksanWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_ItrMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_StructureTestNetworkMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_BitgoelEcoEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_AnjwaSmartFarmSolarCityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_DaewonGreenEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_SaemangeumHeemangPhotovoltaicMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_Ud4mMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_SuredatalabMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_HankookElectricPowerInformationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_KostureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_GoesanSolarParkMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_JejuGimnyeongWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_YudangSolarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_OneAssociatesOverseasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_FourAssociatesOverseasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_NaepoGreenEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_CheongnaEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_HyundaiEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_DaeguGreenPowerJointVenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_KAPESMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_HonamWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_JeongamWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_KoreaPowerEngineeringServiceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_SeokmunEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_IncheonNewPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_ChuncheonEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_YeonggwangbaeksuWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_YeonggwangWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_SamYangPhotovoltaicPowerCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_NHAmundiGlobalInfrastructureInvestmentPrivateInvestmentTrust21Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_KWNuclearComponentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_KEPCOUhdeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_BusanShinhoSolarPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_GlobalTradeOfPowerSystemMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_ExpresswaySolarlightPowerGenerationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_DaesanGreenEnergyCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_Cheong-SongNoraesanWindPowerCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_SaemangeumSolarPowerCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_JaeunResidentWindPowerPlantCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_DangjinEcoPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_BitsolarEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_BusanIndustrialSolarPowerCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_HaemodumSolarCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_YeongamSolarPowerCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_SolaseadoSolarPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_ChungsongmeonBongsanWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_EnergycoCo.Ltd.FormerlyEnergycoLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_BusanIndustrialSolarPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_OmisanWindPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_ThirtyFiveJointVenturesOverseasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_KwNuclearComponentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_SamsuWindPowerCoLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_FiveJointVenturesOverseasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_EighteenJointVenturesOverseasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=kep_KoreaDevelopmentBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |