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v3.23.1

Related Parties - Summary of Transactions Between Related Parties (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Dongducheon Dream Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | ₩ 8,942 | ₩ 19,923 | ₩ 7,757
Electricity purchase |  | 2,244,332 | 750,148 | 552,692
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 592 | 6,282 |
Trade payables |  | 293,256 | 114,613 |
Non-trade receivables and others |  | 270 | 493 |
Saemangeum Sebit Power Plant Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 1,418 | 0 | 0
Electricity purchase |  | 23,159 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade receivables and others |  | 653 | 0 |
Korea Gas Corporation |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 155,309 | 96,362 | 97,685
Fuel purchase |  | 11,996,402 | 5,646,713 | 3,270,972
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables | [1] | 12,415 | 10,015 |
Trade payables | [1] | 1,882,607 | 800,509 |
Non-trade receivables and others | [1] | 54,232 | 187 |
Non-trade payables and others | [1] | 1,294 | 759 |
Daejung Offshore Wind Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 46 | 46 | 32
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade receivables and others |  | 123 | 77 |
Daegu Photovoltaic Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 268 | 207 | 325
Electricity purchase |  | 4,744 | 3,532 | 3,313
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade payables |  | 135 | 115 |
Non-trade payables and others |  | 2 | 0 |
Haeng Bok Do Si Photovoltaic Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 2 | 2 | 2
Electricity purchase |  | 563 | 393 | 370
Korea Electric Power Industrial Development Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Service |  | 10,369 | 11,208 | 10,833
Service |  | 251,468 | 241,925 | 212,366
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 164 | 269 |
Trade payables |  | 150 | 873 |
Non-trade receivables and others |  | 2 | 15 |
Non-trade payables and others |  | 9,588 | 5,880 |
Goseong Green Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Fuel sales |  | 1,062,108 | 514,470 | 47,701
Electricity purchase |  | 1,905,502 | 987,540 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 76,254 | 495 |
Trade payables |  | 182,095 | 218,627 |
Non-trade receivables and others |  | 14 | 76,855 |
Non-trade payables and others |  | 52,515 | 59,987 |
Gangneung Eco Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Fuel sales |  | 459,404 | 14,200 | 10,178
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 19,364 | 826 |
Non-trade receivables and others |  | 478 | 465 |
Non-trade payables and others |  | 94 | 97 |
Shin Pyeongtaek Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 27,486 | 23,501 | 20,791
Electricity purchase |  | 957,294 | 653,306 | 520,737
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 7,375 | 1,788 |
Trade payables |  | 109,274 | 79,828 |
Non-trade receivables and others |  | 1,068 | 3,116 |
Non-trade payables and others |  | 101 | 99 |
Noeul Green Energy Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 9,396 | 30 | 30
Electricity purchase |  | 14,176 | 10,014 | 10,634
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 3 | 3 |
Non-trade receivables and others |  | 9,365 | 1,169 |
Non-trade payables and others |  | 2,468 | 0 |
Samcheok Eco Materials Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 546 | 620 | 700
Electricity purchase |  | 12,019 | 13,612 | 10,713
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 46 | 52 |
YTN Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 2,180 | 1,922 | 1,805
Electricity purchase |  | 304 | 388 | 353
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 112 | 99 |
Busan Green Energy Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 5,055 | 49 | 34
Electricity purchase |  | 26,219 | 18,996 | 18,678
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 1 | 1 |
Non-trade receivables and others |  | 26,681 | 20,658 |
Non-trade payables and others |  | 4,415 | 0 |
Gunsan Bio Energy Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 0 | 20 | 102
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade receivables and others |  | 11,728 | 11,728 |
Korea Electric Vehicle Charging Service |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales | [2] | 3,686 | 3,039 | 1,956
Electricity purchase | [2] | 0 | 393 | 581
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables | [2] | 0 | 193 |
Non-trade receivables and others | [2] | 0 | 120 |
YaksuESS Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity purchase |  | 851 | 1,715 | 217
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade payables |  | 0 | 1,374 |
Gangwon Wind Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 1,549 | 1,865 | 2,109
Electricity purchase |  | 40,130 | 19,623 | 23,350
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 6 | 8 |
Trade payables |  | 5,197 | 4,293 |
Gwangyang Green Energy Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 1,848 | 486 | 23
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade receivables and others |  | 1,436 | 532 |
Bigeum Resident Photovoltaic Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 660 | 755 | 85
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 343 | 922 |
Non-trade receivables and others |  | 516 | 0 |
Hyundai Green Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales and design service |  | 7,063 | 11,934 | 17,257
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 839 | 229 |
Korea Power Exchange |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Service |  | 16,596 | 39,796 | 25,919
Service |  | 93,817 | 86,716 | 87,361
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 223 | 627 |
Non-trade receivables and others |  | 0 | 1,300 |
Non-trade payables and others |  | 2,405 | 2,189 |
Taebaek Wind Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Service |  | 861 | 44 | 226
Service and REC |  | 7,442 | 5,930 | 4,003
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade payables |  | 680 | 560 |
Non-trade payables and others |  | 178 | 262 |
Taebaek Guinemi Wind Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 0 | 26 | 37
Electricity purchase |  | 6,793 | 5,910 | 5,023
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade payables |  | 885 | 670 |
Pyeongchang Wind Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 1,323 | 1,180 | 2,064
Design service and others |  | 3,884 | 4,099 | 3,969
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 3 | 4 |
Non-trade payables and others |  | 211 | 0 |
Daeryun Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 2,016 | 1,944 | 1,947
Electricity purchase |  | 428,534 | 157,234 | 99,523
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 195 | 213 |
Trade payables |  | 55,725 | 21,362 |
Changjuk Wind Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales | [3] | 1,350 | 463 | 2,067
Electricity purchase | [3] | 9,027 | 6,213 | 6,084
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade payables | [3] | 0 | 724 |
Non-trade payables and others | [3] | 0 | 295 |
GS Donghae Electric Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 5,238 | 21,127 | 31,557
Electricity purchase |  | 1,035,263 | 760,377 | 660,351
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables | [4] | 872 | 383 |
Trade payables | [4] | 72,947 | 113,529 |
Non-trade receivables and others | [4] | 1,558 | 272 |
Non-trade payables and others | [4] | 14,565 | 17 |
KNH Solar Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 13 | 14 | 16
Electricity purchase |  | 4,348 | 3,222 | 3,564
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 1 | 1 |
S-Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Service |  | 4,588 | 5,229 | 6,682
Service |  | 1,091,741 | 608,530 | 293,515
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 77 | 82 |
Trade payables |  | 135,504 | 91,277 |
Non-trade receivables and others |  | 44 | 48 |
Non-trade payables and others |  | 11 | 0 |
Chuncheon Green Energy Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 2 | 0 | 0
PND Solar Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 427 | 416 | 409
Electricity purchase |  | 6,173 | 5,502 | 5,234
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade payables |  | 210 | 0 |
Hyundai Eco Energy Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 277 | 187 | 167
Electricity purchase |  | 29,209 | 25,762 | 17,777
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 22 | 19 |
Trade payables |  | 738 | 732 |
YeongGwang Yaksu Wind Electric Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 66 | 78 | 77
Electricity purchase |  | 7,382 | 11,729 | 9,151
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 7 | 6 |
Trade payables |  | 589 | 0 |
Non-trade payables and others |  | 2,050 | 0 |
Korea Energy Solutions Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 2 | 2 | 7
Electricity purchase |  | 102 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade payables and others |  | 94 | 0 |
Gwangbaek Solar Power Investment Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity purchase |  | 602 | 742 | 373
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade payables and others |  | 61 | 0 |
Green Energy Electricity Generation Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity purchase |  | 2,962 | 1,238 | 0
Namjeongsusang Solar Power Operation Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 21 | 22 | 14
Electricity purchase |  | 9,491 | 14,286 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 2 | 0 |
Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1 |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Service |  | 394 | 399 | 291
Muan Solar Park Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 950 | 232 | 57
REC and others |  | 17,052 | 31,017 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 25 | 0 |
Non-trade receivables and others |  | 9 | 23 |
Suwon New Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 118 | 1,820 | 2,974
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade receivables and others |  | 1,280 | 1,198 |
Muan Sunshine Solar Power Plant Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 17 | 52 | 30
Electricity purchase |  | 19,514 | 15,900 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade payables |  | 3,076 | 1,748 |
Non-trade payables and others |  | 1,265 | 0 |
Energy Infra Asset Management Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 0 | 4,629 | 0
Service |  | 2,779 | 2,657 | 0
Taebaek Gadeoksan Wind Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 1,952 | 295 | 0
Electricity purchase |  | 25,880 | 16,360 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade payables |  | 12,739 | 8,397 |
Non-trade receivables and others |  | 97 | 119 |
Non-trade payables and others |  | 5 | 1,571 |
ITR Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Service |  | 6 | 3 | 0
Structure test network Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Service |  | 7 | 5 | 0
Bitgoel Eco Energy Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 1,397 | 282 | 0
Service and others |  | 930 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade receivables and others |  | 6 | 27 |
Non-trade payables and others |  | 1,023 | 0 |
Anjwa Smart Farm & Solar City Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 1,068 | 624 | 0
Electricity purchase |  | 16,942 | 24,601 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade payables and others |  | 921 | 0 |
Daewon Green Energy Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 185 | 155 | 0
Others |  | 42,651 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 1 | 0 |
Trade payables |  | 5,485 | 0 |
Non-trade receivables and others |  | 0 | 94 |
Saemangeum Heemang Photovoltaic Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 5,740 | 13 | 0
Electricity purchase |  | 1,039 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade receivables and others |  | 3,435 | 0 |
Non-trade payables and others |  | 1 | 0 |
UD four M Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 2 | 4 | 0
Electricity purchase |  | 313 | 0 | 0
Dongbu Highway Solar Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 8 | 5 | 0
Electricity purchase |  | 3,516 | 2,605 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 1 | 1 |
Trade payables |  | 2 | 98 |
Non-trade payables and others |  | 2 | 90 |
Seobu Highway Solar Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 8 | 8 | 0
Electricity purchase |  | 3,452 | 2,936 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 1 | 0 |
Trade payables |  | 8 | 177 |
Non-trade payables and others |  | 3 | 105 |
SureDataLab Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 1 | 1 | 0
Hankook Electric Power Information Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 0 | 1 | 0
Kosture Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 5 | 1 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 6 | 1 |
Goesan Solar park Co., Ltd |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity purchase |  | 7,642 | 6,209 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade payables |  | 346 | 73 |
Jeju Gimnyeong Wind Power Co., Ltd |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity purchase |  | 12,364 | 12,833 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade payables |  | 1,758 | 885 |
Non-trade receivables and others |  | 130 | 0 |
Seoroseoro Sunny Power Plant Co Ltd |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 1 | 0 | 0
REC and others |  | 1,138 | 217 | 0
YuDang Solar Co., Ltd |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 160 | 0 | 0
REC and others |  | 1,915 | 3,495 | 0
Jeju Gimnyeong Wind Power Co., Ltd. [Member] |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 367 | 0 | 0
PlatformN. Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Others |  | 14 | 0 | 0
Others |  | 475 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade payables and others |  | 232 | 0 |
Gangneung Sacheon Fuel Cell Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 151 | 0 | 0
12 Associates (Overseas) |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 548,507 | 125,723 | 66,755
Electricity purchase |  | 101,790 | 502 | 0
G.GURU Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity purchase |  | 452 | 0 | 0
Tronix Co., Ltd. |  |  |  |
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade receivables and others |  | 1 | 0 |
8 Associates (Overseas) |  |  |  |
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 93 | 0 |
Non-trade receivables and others |  | 49,409 | 3,196 |
Non-trade payables and others |  | 502 | 502 |
Naepo Green Energy Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 761 | 467 | 217
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 169 | 42 |
Non-trade payables and others |  | 3 | 0 |
Cheongna Energy Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Others |  | 39,802 | 16,469 | 13,791
Service |  | 80 | 57 | 66
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 17,324 | 4,164 |
Non-trade receivables and others |  | 1,654 | 1,350 |
Non-trade payables and others |  | 1 | 1 |
Dayone Energy Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Service |  | 7,761 | 8,159 | 4,816
Service |  | 13,872 | 5,409 | 1,120
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 79 | 52 |
Trade payables |  | 1,027 | 1,009 |
Non-trade receivables and others |  | 10,218 | 13,297 |
Non-trade payables and others |  | 9,119 | 11,306 |
Daegu Green Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 1,190 | 1,053 | 1,285
Electricity purchase |  | 508,601 | 289,052 | 215,224
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 53 | 71 |
Trade payables |  | 66,715 | 35,766 |
Non-trade receivables and others |  | 56 | 55 |
KAPES, Inc. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Commission |  | 450 | 413 | 476
Commission |  | 9,306 | 64,140 | 219,673
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 2 | 2 |
Non-trade payables and others |  | 106 | 2,121 |
Honam Wind Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 242 | 71 | 502
Electricity purchase |  | 7,662 | 4,807 | 4,382
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade payables |  | 515 | 575 |
Jeongam Wind Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity purchase |  | 0 | 3,145 | 5,982
Electricity sales and others |  | 0 | 588 | 1,213
Korea Power Engineering Service Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Service |  | 268 | 339 | 203
Service |  | 830 | 1,315 | 1,594
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade receivables and others |  | 47 | 48 |
Non-trade payables and others |  | 77 | 0 |
Seokmun Energy Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Service |  | 1,685 | 1,701 | 1,932
Service |  | 60,799 | 44,315 | 33,164
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 67 | 34 |
Trade payables |  | 7,000 | 7,941 |
Non-trade receivables and others |  | 113 | 149 |
Incheon New Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Construction revenue |  | 14 | 14 | 14
Chun-cheon Energy Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 2,505 | 2,329 | 2,657
Electricity purchase |  | 585,689 | 327,536 | 222,069
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 124 | 126 |
Trade payables |  | 79,117 | 41,410 |
Non-trade receivables and others |  | 165 | 167 |
Yeonggwangbaeksu Wind Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 1,898 | 1,836 | 1,788
Electricity purchase |  | 13,990 | 9,471 | 11,232
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 8 | 6 |
Trade payables |  | 1,076 | 1,099 |
Non-trade receivables and others |  | 166 | 53 |
Yeonggwang Wind Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 871 | 818 | 793
Electricity purchase |  | 31,221 | 21,004 | 24,103
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 12 | 10 |
Trade payables |  | 2,251 | 730 |
Non-trade receivables and others |  | 62 | 59 |
NH-Amundi Global Infrastructure Investment Private Investment Trust 21 |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Service |  | 1,415 | 1,727 | 1,388
KW Nuclear Components Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Service |  | 1,624 | 2,598 | 1,639
Service |  | 9,504 | 96 | 0
KEPCO-Uhde Inc. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 12 | 10 | 8
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade payables and others |  | 10 | 10 |
Busan Shinho Solar Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 502 | 376 | 353
Electricity purchase |  | 10,601 | 7,895 | 7,296
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 3 | 2 |
Trade payables |  | 304 | 281 |
Global Trade Of Power System Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Service |  | 715 | 323 | 337
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade payables and others |  | 0 | 7 |
Expressway Solar-light Power Generation Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity purchase |  | 4,016 | 3,146 | 2,472
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade payables |  | 166 | 102 |
Daesan Green Energy Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 394 | 523 | 703
Electricity purchase |  | 129,736 | 146,776 | 104,854
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 18 | 11 |
Trade payables |  | 4,946 | 5,120 |
Non-trade receivables and others |  | 218 | 120 |
Cheong-Song Noraesan Wind Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 698 | 30 | 29
Electricity purchase |  | 980 | 0 | 0
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 |  | 100 | 1,141 | 2,846
Electricity purchase |  | 1 | 5 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade receivables and others |  | 4,368 | 4,268 |
Dangjin Eco Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 32 | 32 | 33
Electricity purchase |  | 5,696 | 4,139 | 3,953
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 3 | 3 |
Trade payables |  | 222 | 276 |
Non-trade payables and others |  | 105 | 0 |
Bitsolar Energy Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 498 | 296 | 42
Electricity purchase |  | 13,030 | 5,703 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade payables |  | 201 |  |
Non-trade receivables and others |  | 222 | 7 |
Non-trade payables and others |  | 0 | 54 |
Busan Industrial Solar Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity purchase |  | 4,575 | 2,815 | 19
Haemodum Solar Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 42 | 6 | 4
Electricity purchase |  | 2,168 | 1,625 | 967
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 1 | 1 |
Yeongam Solar Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 379 | 339 | 165
Electricity purchase |  | 44,745 | 47,805 | 32,208
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 44 | 29 |
Trade payables |  | 3,655 | 3,324 |
Solaseado Solar Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 1,851 | 2,890 | 66
Electricity purchase |  | 28,698 | 31,031 | 28,516
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade receivables and others |  | 23 | 0 |
Non-trade payables and others |  | 2,911 | 0 |
Chungsongmeon BongSan wind power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 1 | 1 | 0
Busan Industrial Solar Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 14 | 9 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 2 | 1 |
Trade payables |  | 0 | 54 |
Non-trade receivables and others |  | 0 | 24 |
Omisan Wind Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 1 | 1 | 0
Electricity purchase |  | 0 | 7 | 0
KW Nuclear Components Co., Ltd |  |  |  |
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 4 | 0 |
Non-trade receivables and others |  | 18 | 0 |
Samsu Wind Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity purchase |  | 10,605 | 2,800 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade payables |  | 1,303 | 1,300 |
Seobusambo highway photovoltaics Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 3 | 0 | 0
Electricity purchase |  | 103 | 0 | 0
Prime Swedish Holding AB [Member] |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 284 | 0 | 0
Western Power Changgi Solar Co., Ltd. (formerly, Sam-Yang Photovoltaic Power Co., Ltd.) |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales | [3] | 0 | 1,920 | 33
Electricity purchase | [3] | 0 | 5,852 | 3,848
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables | [3] | 0 | 5 |
Goheung New Energy Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 141 | 0 | 0
Gunsan Land Solar Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 518 | 0 | 0
Electricity purchase |  | 533 | 0 |
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade receivables and others |  | 138 | 0 |
Hapcheon Floating Photovoltaic Power Plant Inc. [Member] |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 544 | 0 | 0
Service and REC |  | 2,526 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 9 | 0 |
Cheongju Eco Park Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 204 | 0 | 0
Electricity purchase |  | 94,409 | 0 |
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade payables |  | 7,994 | 0 |
Enel X Midland Photovoltaic, LLC |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 12 | 0 | 0
Electricity purchase |  | 1,871 | 0 |
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 1 | 0 |
Trade payables |  | 3 | 0 |
Eumseong Eco Park Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 2 | 0 | 0
37 Joint ventures (Overseas) |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 606,513 | 773,291 | 831,596
Electricity purchase |  | 16,859 | 54,135 | 14,767
Energyco Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 463 | 1 | 0
Electricity purchase |  | 7,898 | 0 |
Geumsungsan Wind Power Co., Ltd. |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 7 | 0 | 0
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 3 | 0 |
Non-trade payables and others |  | 1 | 0 |
22 Joint ventures (Overseas) |  |  |  |
Outstanding balances for related party transactions [abstract] |  |  |  |
Trade receivables |  | 73,805 | 84,150 |
Non-trade receivables and others |  | 71,661 | 26,060 |
Non-trade payables and others |  | 117,754 | 22,050 |
Korea Development Bank |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |
Electricity sales |  | 4,134 | 4,177 | 4,248
Dividends paid |  | 12 | 256,862 | 17
Interest income |  | 2,222 | 756 | 3,461
Interest expense |  | 4,208 | 2,756 | ₩ 3,872
Outstanding balances for related party transactions [abstract] |  |  |  |
Non-trade receivables and others |  | 30,836 | 420,732 |
Non-trade payables and others |  | 101 | 21,172 |
Accrued interest income |  | 5 | 154 |
Derivative assets |  | 67,662 | 59,139 |
Derivative liabilities |  | ₩ 3,759 | ₩ 0 |
[1] | The balance due to the fuel swap with Korea Midland Power Co., Ltd. is included. The total transaction amount is ￦514,405 million on loans and ￦460,903 million on bororrowings.
[2] | The Company has disposed of shares of Korea Electric Vehicle Charging Service during the year ended December 31, 2022, and it is not a related party to the Group as of December 31, 2022.
[3] | Reclassified from a joint venture to a subsidiary during the year ended December 31, 2022. Transactions are made before the reclassification.
[4] | The balance due to the fuel swap with Korea Western Power Co., Ltd. and Korea East-West Power Co., Ltd. is included. The total transaction amount is ￦5,590 million on loans and ￦20,113 million on bororrowings.

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