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v3.22.1

Investments in Associates 1 (Details) - KRW (₩) ₩ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of associates [line items] |  |  |  |  |  |
Acquisition cost |  | ₩ 3,059,835 |  | ₩ 2,481,761 |  |
Book value |  | ₩ 5,232,373 |  | ₩ 4,250,787 |  | ₩ 4,251,802
Korea Gas Corporation |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Importing and wholesaling LNG |  | Importing and wholesaling LNG | [1] |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 20.47% |  | 20.47% | [1] |
Acquisition cost |  | ₩ 94,500 |  | ₩ 94,500 | [1] |
The fair value of associates |  | 738,990 |  | 584,010 |  |
Book value |  | ₩ 1,815,513 |  | ₩ 1,647,325 | [1] | 1,693,967
Korea Electric Power Industrial Development Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Electricity metering and others |  | Electricity metering and others |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 29.00% |  | 29.00% |  |
Acquisition cost |  | ₩ 4,727 |  | ₩ 4,727 |  |
The fair value of associates |  | 115,339 |  | 45,048 |  |
Book value |  | ₩ 24,617 |  | ₩ 25,630 |  | 25,393
YTN Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Broadcasting |  | Broadcasting |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 21.43% |  | 21.43% |  |
Acquisition cost |  | ₩ 59,000 |  | ₩ 59,000 |  |
The fair value of associates |  | 26,550 |  | 27,000 |  |
Book value |  | ₩ 51,828 |  | ₩ 40,549 |  | 39,747
Gangwon Wind Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 15.00% |  | 15.00% |  |
Acquisition cost |  | ₩ 5,725 |  | ₩ 5,725 |  |
Book value |  | ₩ 10,554 |  | ₩ 11,443 |  | 12,327
Hyundai Green Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation equipment consignment and operation service |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 29.00% |  | 29.00% |  |
Acquisition cost |  | ₩ 88,885 |  | ₩ 88,885 |  |
Book value |  | ₩ 121,955 |  | ₩ 132,774 |  | 124,253
Korea Power Exchange |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Management of power market and others |  | Management of power market and others |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 100.00% |  | 100.00% |  |
Acquisition cost |  | ₩ 127,839 |  | ₩ 127,839 |  |
Book value |  | 269,728 |  | 269,122 |  | 258,899
Dayone Energy Co., Ltd. (formerly, Hyundai Energy Co., Ltd.) |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Unrecognized equity interest |  | (1,244) |  | (14,035) |  |
Accumulated unrecognized equity interest |  | ₩ 23,452 |  | ₩ 24,696 |  |
Taebaek Wind Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 25.00% |  | 25.00% |  |
Acquisition cost |  | ₩ 3,810 |  | ₩ 3,810 |  |
Book value |  | ₩ 6,800 |  | ₩ 6,392 |  | 7,039
Taeback Guinemi Wind Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 25.00% |  | 25.00% |  |
Acquisition cost |  | ₩ 3,420 |  | ₩ 3,420 |  |
Book value |  | ₩ 3,357 |  | ₩ 3,087 |  | 2,553
Pyeongchang Wind Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 25.00% |  | 25.00% |  |
Acquisition cost |  | ₩ 3,875 |  | ₩ 3,875 |  |
Book value |  | ₩ 5,411 |  | ₩ 5,027 |  | 5,877
Daeryun Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 9.34% |  | 9.34% |  |
Acquisition cost |  | ₩ 40,854 |  | ₩ 40,854 |  |
Book value |  | ₩ 25,426 |  | ₩ 26,353 |  | 26,247
Changjuk Wind Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 30.00% |  | 30.00% |  |
Acquisition cost |  | ₩ 3,801 |  | ₩ 3,801 |  |
Book value |  | ₩ 8,355 |  | ₩ 7,867 |  | 8,520
KNH Solar Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 27.00% |  | 27.00% |  |
Acquisition cost |  | ₩ 1,296 |  | ₩ 1,296 |  |
Book value |  | ₩ 2,278 |  | ₩ 2,436 |  | 2,382
SPC Power Corporation |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Philippines |  | Philippines |  |
Percentage of ownership |  | 38.00% |  | 38.00% |  |
Acquisition cost |  | ₩ 20,635 |  | ₩ 20,635 |  |
The fair value of associates |  | 203,589 |  | 139,698 |  |
Book value |  | ₩ 65,046 |  | ₩ 69,912 |  | 63,583
Gemeng International Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | China |  | China |  |
Percentage of ownership |  | 34.00% |  | 34.00% |  |
Acquisition cost |  | ₩ 413,153 |  | ₩ 413,153 |  |
Book value |  | ₩ 595,218 |  | ₩ 679,708 |  | 670,896
PT. Cirebon Electric Power |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Indonesia |  | Indonesia |  |
Percentage of ownership |  | 27.50% |  | 27.50% |  |
Acquisition cost |  | ₩ 40,365 |  | ₩ 40,365 |  |
Book value |  | ₩ 121,969 |  | ₩ 117,811 |  | 123,425
KNOC Nigerian East Oil Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Resources development |  | Resources development |  |
Location |  | Nigeria |  | Nigeria |  |
Percentage of ownership |  | 14.63% |  | 14.63% |  |
Acquisition cost |  | ₩ 12 |  | ₩ 12 |  |
Book value |  | ₩ 0 |  | ₩ 0 |  | 0
KNOC Nigerian West Oil Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Resources development |  | Resources development |  |
Location |  | Nigeria |  | Nigeria |  |
Percentage of ownership |  | 14.63% |  | 14.63% |  |
Acquisition cost |  | ₩ 12 |  | ₩ 12 |  |
Book value |  | ₩ 0 |  | ₩ 0 |  | 0
PT Wampu Electric Power |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Indonesia |  | Indonesia |  |
Percentage of ownership |  | 46.00% |  | 46.00% |  |
Acquisition cost |  | ₩ 21,292 |  | ₩ 21,292 |  |
Book value |  | ₩ 35,077 |  | ₩ 27,865 |  | 29,355
PT. Bayan Resources TBK |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Resources development |  | Resources development |  |
Location |  | Indonesia |  | Indonesia |  |
Percentage of ownership |  | 20.00% |  | 20.00% |  |
Acquisition cost |  | ₩ 615,860 |  | ₩ 615,860 |  |
The fair value of associates |  | 1,495,801 |  | 798,510 |  |
Book value |  | ₩ 661,289 |  | ₩ 425,234 |  | 445,141
S-Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 49.00% |  | 49.00% |  |
Acquisition cost |  | ₩ 132,300 |  | ₩ 132,300 |  |
Book value |  | ₩ 122,786 |  | ₩ 110,292 |  | 115,784
Pioneer Gas Power Limited |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | India |  | India |  |
Percentage of ownership |  | 38.50% |  | 38.50% |  |
Acquisition cost |  | ₩ 49,831 |  | ₩ 49,831 |  |
Book value |  | 0 |  | 0 |  | 0
Unrecognized equity interest |  | 21,691 |  | 15,824 |  |
Accumulated unrecognized equity interest |  | ₩ 37,629 |  | ₩ 15,938 |  |
Eurasia Energy Holdings |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation and resources development |  | Power generation and resources development |  |
Location |  | Russia |  | Russia |  |
Percentage of ownership |  | 40.00% |  | 40.00% |  |
Acquisition cost |  | ₩ 461 |  | ₩ 461 |  |
Book value |  | 0 |  | 0 |  | 0
Unrecognized equity interest |  | 15 |  | (10) |  |
Accumulated unrecognized equity interest |  | ₩ 190 |  | ₩ 175 |  |
Xe-Pian Xe-Namnoy Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Laos |  | Laos |  |
Percentage of ownership |  | 25.00% |  | 25.00% |  |
Acquisition cost |  | ₩ 87,426 |  | ₩ 87,426 |  |
Book value |  | 92,441 |  | ₩ 64,570 |  | 72,935
Hadong Mineral Fiber Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  |  |  | Recycling fly ashes |  |
Location |  |  |  | Korea |  |
Percentage of ownership |  |  |  | 8.33% |  |
Acquisition cost |  |  |  | ₩ 50 |  |
Book value |  | 0 |  | 0 |  | 0
Unrecognized equity interest |  | 0 |  | 0 |  |
Accumulated unrecognized equity interest |  | ₩ 0 |  | ₩ 2 |  |
PT. Mutiara Jawa |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Manufacturing and operating floating coal terminal |  | Manufacturing and operating floating coal terminal |  |
Location |  | Indonesia |  | Indonesia |  |
Percentage of ownership |  | 29.00% |  | 29.00% |  |
Acquisition cost |  | ₩ 2,978 |  | ₩ 2,978 |  |
Book value |  | ₩ 2,569 |  | ₩ 1,780 |  | 1,438
Samcheok Eco Materials Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Recycling fly ashes |  | Recycling fly ashes |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 2.35% |  | 2.35% |  |
Acquisition cost |  | ₩ 686 |  | ₩ 686 |  |
Book value |  | ₩ 0 |  | ₩ 0 |  | 0
Noeul Green Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 29.00% |  | 29.00% |  |
Acquisition cost |  | ₩ 1,740 |  | ₩ 1,740 |  |
Book value |  | 3,808 |  | 4,197 |  | 6,610
Naepo Green Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Book value |  |  |  | 0 |  | 0
Unrecognized equity interest |  | 5,469 |  | (7,003) |  |
Accumulated unrecognized equity interest |  | ₩ 7,747 |  | ₩ 2,278 |  |
Goseong Green Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 29.00% |  | 1.12% |  |
Acquisition cost |  | ₩ 262,740 |  | ₩ 2,900 |  |
Book value |  | ₩ 260,858 |  | ₩ 2,186 |  | 2,340
Gangneung Eco Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 1.61% |  | 1.61% |  |
Acquisition cost |  | ₩ 2,900 |  | ₩ 2,900 |  |
Book value |  | ₩ 2,288 |  | ₩ 2,368 |  | 2,430
Shin Pyeongtaek Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 40.00% |  | 40.00% |  |
Acquisition cost |  | ₩ 72,000 |  | ₩ 72,000 |  |
Book value |  | ₩ 93,074 |  | ₩ 69,591 |  | 66,956
Haeng Bok Do Si Photovoltaic Power Co Ltd |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 28.00% |  | 28.00% |  |
Acquisition cost |  | ₩ 194 |  | ₩ 194 |  |
Book value |  | ₩ 223 |  | ₩ 210 |  | 215
Dongducheon Dream Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 33.61% |  | 33.61% |  |
Acquisition cost |  | ₩ 148,105 |  | ₩ 148,105 |  |
Book value |  | ₩ 74,198 |  | ₩ 80,637 |  | 76,547
Jinbhuvish Power Generation Pvt. Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | India |  | India |  |
Percentage of ownership |  | 5.16% |  | 5.16% |  |
Acquisition cost |  | ₩ 9,000 |  | ₩ 9,000 |  |
Book value |  | ₩ 0 |  | ₩ 0 |  | 0
Daejung Offshore Wind Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 46.59% |  | 46.59% |  |
Acquisition cost |  | ₩ 5,190 |  | ₩ 5,190 |  |
Book value |  | ₩ 1,704 |  | ₩ 2,165 |  | 2,361
GS Donghae Electric Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 34.00% |  | 34.00% |  |
Acquisition cost |  | ₩ 204,000 |  | ₩ 204,000 |  |
Book value |  | ₩ 243,772 |  | ₩ 244,426 |  | 255,983
Daegu Photovoltaic Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 29.00% |  | 29.00% |  |
Acquisition cost |  | ₩ 1,230 |  | ₩ 1,230 |  |
Book value |  | ₩ 2,342 |  | ₩ 2,066 |  | 2,060
Busan Green Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 29.00% |  | 29.00% |  |
Acquisition cost |  | ₩ 5,243 |  | ₩ 5,243 |  |
Book value |  | ₩ 5,032 |  | ₩ 8,778 |  | 10,637
Gunsan Bio Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 18.87% |  | 18.87% |  |
Acquisition cost |  | ₩ 1,000 |  | ₩ 1,000 |  |
Book value |  | 0 |  | 0 |  | 0
Unrecognized equity interest |  | 282 |  | 290 |  |
Accumulated unrecognized equity interest |  | ₩ 3,864 |  | ₩ 3,582 |  |
Korea Electric Vehicle Charging Service |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Electric vehicle charge service |  | Electric vehicle charge service |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 17.50% |  | 28.00% |  |
Acquisition cost |  | ₩ 2,800 |  | ₩ 2,800 |  |
Book value |  | ₩ 1,250 |  | ₩ 576 |  | 1,063
Hansuwon KNP Co., Ltd. (formerly, Korea Nuclear Partners Co., Ltd.) [Member] |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Electric material agency |  |  |  |
Location |  | Korea |  |  |  |
Percentage of ownership |  | 28.98% |  |  |  |
Acquisition cost |  | ₩ 537 |  |  |  |
Book value |  | ₩ 219 |  |  |  |
Korea Nuclear Partners Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  |  |  | Electric material agency |  |
Location |  |  |  | Korea |  |
Percentage of ownership |  |  |  | 28.98% |  |
Acquisition cost |  |  |  | ₩ 537 |  |
Book value |  |  |  | ₩ 200 |  | 0
Korea Electric Power Corporation Fund |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Developing electric enterprises |  | Developing electric enterprises |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 98.09% |  | 98.09% |  |
Acquisition cost |  | ₩ 48,410 |  | ₩ 51,500 |  |
Book value |  | ₩ 47,983 |  | ₩ 41,926 |  | 41,126
Energy Infra Asset Management Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Asset management |  | Asset management |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 9.90% |  | 9.90% |  |
Acquisition cost |  | ₩ 297 |  | ₩ 297 |  |
Book value |  | ₩ 1,066 |  | ₩ 938 |  | 791
Daegu clean Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Renewable power generation |  | Renewable power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 28.00% |  | 28.00% |  |
Acquisition cost |  | ₩ 140 |  | ₩ 140 |  |
Book value |  | ₩ 12 |  | ₩ 12 |  | 13
Yaksu ESS Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Installing ESS related equipment |  | Installing ESS related equipment |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 29.00% |  | 29.00% |  |
Acquisition cost |  | ₩ 210 |  | ₩ 210 |  |
Book value |  | ₩ 716 |  | ₩ 454 |  | 516
Nepal Water & Energy Development Company Private Ltd |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Construction and operation of utility plant |  | Construction and operation of utility plant |  |
Location |  | Nepal |  | Nepal |  |
Percentage of ownership |  | 69.06% |  | 60.35% |  |
Acquisition cost |  | ₩ 70,228 |  | ₩ 50,268 |  |
Book value |  | ₩ 66,333 |  | ₩ 42,677 |  | 31,145
Gwangyang Green Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 20.00% |  | 20.00% |  |
Acquisition cost |  | ₩ 26,800 |  | ₩ 2,000 |  |
Book value |  | ₩ 25,466 |  | ₩ 926 |  | 948
PND Solar Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 29.00% |  | 29.00% |  |
Acquisition cost |  | ₩ 1,250 |  | ₩ 1,250 |  |
Book value |  | ₩ 1,229 |  | ₩ 1,149 |  | 1,144
Hyundai Ecoenergy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 19.00% |  | 19.00% |  |
Acquisition cost |  | ₩ 3,610 |  | ₩ 3,610 |  |
Book value |  | ₩ 5,572 |  | ₩ 4,250 |  | 3,781
YeongGwang Yaksu Wind Electric Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 9.63% |  | 9.63% |  |
Acquisition cost |  | ₩ 533 |  | ₩ 533 |  |
Book value |  | ₩ 233 |  | ₩ 312 |  | 386
Green Energy Electricity Generation Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 29.00% |  | 29.00% |  |
Acquisition cost |  | ₩ 1,189 |  | ₩ 1,189 |  |
Book value |  | ₩ 1,713 |  | ₩ 25 |  | 163
Korea Energy Solution Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | R & D |  | R & D |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 20.00% |  | 20.00% |  |
Acquisition cost |  | ₩ 300 |  | ₩ 300 |  |
Book value |  | ₩ 123 |  | ₩ 197 |  | 259
ITR Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | R & D |  | R & D |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 20.00% |  | 20.00% |  |
Acquisition cost |  | ₩ 50 |  | ₩ 50 |  |
Book value |  | ₩ 32 |  | ₩ 40 |  | 33
Structure test network Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Technical testing and consulting |  | Technical testing and consulting |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 20.00% |  | 20.00% |  |
Acquisition cost |  | ₩ 25 |  | ₩ 25 |  |
Book value |  | ₩ 306 |  | ₩ 27 |  | 21
Namjeongsusang Solar Power Operation Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 15.00% |  | 15.00% |  |
Acquisition cost |  | ₩ 969 |  | ₩ 969 |  |
Book value |  | ₩ 361 |  | ₩ 103 |  | 812
Indeck Niles Development, LLC |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | USA |  | USA |  |
Percentage of ownership |  | 56.25% | [2] | 24.08% |  |
Acquisition cost |  | ₩ 268,113 | [2] | ₩ 45,562 |  |
Book value |  | ₩ 246,273 | [2] | ₩ 20,627 |  | 0
Indeck Niles Asset Management, LLC |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | USA |  | USA |  |
Percentage of ownership |  | 33.33% |  | 33.33% |  |
Acquisition cost |  | ₩ 0 |  | ₩ 0 |  |
Book value |  | ₩ 111 |  | ₩ 101 |  | 87
Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1 |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Holding company |  | Holding company |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 49.00% |  | 49.00% |  |
Acquisition cost |  | ₩ 7,112 |  | ₩ 7,300 |  |
Book value |  | ₩ 7,138 |  | ₩ 7,326 |  | 7,126
Suwon New Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 39.90% |  | 39.90% |  |
Acquisition cost |  | ₩ 798 |  | ₩ 798 |  |
Book value |  | ₩ 1,035 |  | ₩ 1,054 |  | 798
KPGE Inc. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation materials business |  | Power generation materials business |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 29.00% |  | 29.00% |  |
Acquisition cost |  | ₩ 287 |  | ₩ 287 |  |
Book value |  | ₩ 309 |  | ₩ 287 |  | 287
Gwangbaek Solar Power Investment Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 44.00% |  | 44.00% |  |
Acquisition cost |  | ₩ 4,757 |  | ₩ 4,757 |  |
Book value |  | ₩ 4,806 |  | ₩ 4,682 |  | 2,054
Go deok Clean Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Fuel cell generation |  | Fuel cell generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 40.00% |  | 61.00% |  |
Acquisition cost |  | ₩ 5,560 |  | ₩ 1,830 |  |
Book value |  | ₩ 4,302 |  | ₩ 960 |  |
SureDataLab Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | R & D |  | R & D |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 23.95% |  | 23.95% |  |
Acquisition cost |  | ₩ 126 |  | ₩ 126 |  |
Book value |  | ₩ 128 |  | ₩ 85 |  | 0
SEP Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | R & D |  | R & D |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 21.26% |  | 21.26% |  |
Acquisition cost |  | ₩ 27 |  | ₩ 27 |  |
Book value |  | ₩ 7 |  | ₩ 14 |  | 0
Hankook Electric Power Information Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | R & D |  | R & D |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 25.25% |  | 25.25% |  |
Acquisition cost |  | ₩ 38 |  | ₩ 38 |  |
Book value |  | ₩ 161 |  | ₩ 139 |  | 0
Tronix Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | R & D |  | R & D |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 20.00% |  | 20.00% |  |
Acquisition cost |  | ₩ 75 |  | ₩ 75 |  |
Book value |  | ₩ 109 |  | ₩ 119 |  | 0
O2&B Global Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | R & D |  | R & D |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 20.00% |  | 20.00% |  |
Acquisition cost |  | ₩ 25 |  | ₩ 25 |  |
Book value |  | ₩ 35 |  | ₩ 22 |  | 0
Muan Sunshine Solar Power Plant Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 20.00% |  | 20.00% |  |
Acquisition cost |  | ₩ 1,570 |  | ₩ 1,570 |  |
Book value |  | ₩ 1,268 |  | ₩ 1,096 |  | 0
Bigeum Resident Photovoltaic Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 29.90% |  | 29.90% |  |
Acquisition cost |  | ₩ 1 |  | ₩ 1 |  |
Book value |  | 0 |  | 0 |  | 0
Unrecognized equity interest |  | 182 |  | 116 |  |
Accumulated unrecognized equity interest |  | 298 |  | ₩ 116 |  |
Jeju SolarOne Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  |  |  | Power generation |  |
Location |  |  |  | Korea |  |
Percentage of ownership |  |  |  | 10.00% |  |
Acquisition cost |  |  |  | ₩ 161 |  |
Book value |  | ₩ 0 |  | ₩ 159 |  | 0
Goesan Solar Park Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 29.00% |  | 29.00% |  |
Acquisition cost |  | ₩ 1,276 |  | ₩ 1,276 |  |
Book value |  | ₩ 1,927 |  | ₩ 1,684 |  | 0
Saemangeum Heemang Photovoltaic Co.,Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 35.00% |  | 35.00% |  |
Acquisition cost |  | ₩ 11,022 |  | ₩ 11,022 |  |
Book value |  | ₩ 10,238 |  | ₩ 11,022 |  | 0
Bitgoel Eco Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 29.00% |  | 29.00% |  |
Acquisition cost |  | ₩ 4,640 |  | ₩ 29 |  |
Book value |  | ₩ 4,356 |  | ₩ 29 |  | 0
Jeju Gimnyeong Wind Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 30.00% |  | 30.00% |  |
Acquisition cost |  | ₩ 714 |  | ₩ 714 |  |
Book value |  | ₩ 911 |  | ₩ 1,578 |  | 0
Seoroseoro Sunny Power Plant Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 42.58% |  | 19.46% |  |
Acquisition cost |  | ₩ 706 |  | ₩ 230 |  |
Book value |  | ₩ 721 |  | ₩ 230 |  | 0
Muan Solar Park Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 20.00% |  | 19.00% |  |
Acquisition cost |  | ₩ 4,400 |  | ₩ 4,180 |  |
Book value |  | ₩ 6,083 |  | ₩ 4,180 |  | 0
YuDang Solar Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 20.00% |  | 20.00% |  |
Acquisition cost |  | ₩ 360 |  | ₩ 360 |  |
Book value |  | ₩ 565 |  | ₩ 360 |  | 0
Anjwa Smart Farm & Solar City Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 20.00% |  | 19.50% |  |
Acquisition cost |  | ₩ 5,651 |  | ₩ 5,510 |  |
Book value |  | ₩ 6,784 |  | ₩ 5,510 |  | 0
Daewon Green Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  | Power generation |  |
Location |  | Korea |  | Korea |  |
Percentage of ownership |  | 25.36% |  | 25.36% |  |
Acquisition cost |  | ₩ 3,910 |  | ₩ 3,910 |  |
Book value |  | 3,877 |  | 3,910 |  | ₩ 0
Samcheok Eco Materials Co., Ltd |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Unrecognized equity interest |  | (323) |  | (3) |  |
Accumulated unrecognized equity interest |  | ₩ 462 |  | 785 |  |
G.GURU Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | R & D |  |  |  |
Location |  | Korea |  |  |  |
Percentage of ownership |  | 24.65% |  |  |  |
Acquisition cost |  | ₩ 493 |  |  |  |
Book value |  | ₩ 403 |  |  |  |
UD4M Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities | [3] | R & D |  |  |  |
Location |  | Korea |  |  |  |
Percentage of ownership | [3] | 12.50% |  |  |  |
Acquisition cost | [3] | ₩ 75 |  |  |  |
Book value | [3] | ₩ 144 |  |  |  |
Dongbu Highway Solar Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  |  |  |
Location |  | Korea |  |  |  |
Percentage of ownership |  | 20.00% |  |  |  |
Acquisition cost |  | ₩ 190 |  |  |  |
Book value |  | ₩ 265 |  |  |  |
Seobu Highway Solar Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  |  |  |
Location |  | Korea |  |  |  |
Percentage of ownership |  | 20.00% |  |  |  |
Acquisition cost |  | ₩ 195 |  |  |  |
Book value |  | ₩ 289 |  |  |  |
Korea Energy Data Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | R & D |  |  |  |
Location |  | Korea |  |  |  |
Percentage of ownership |  | 29.37% |  |  |  |
Acquisition cost |  | ₩ 60 |  |  |  |
Book value |  | ₩ 62 |  | 0 |  |
Gangneung Sacheon Fuel Cell Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  |  |  |
Location |  | Korea |  |  |  |
Percentage of ownership | [4] | 65.00% |  |  |  |
Acquisition cost | [4] | ₩ 1,950 |  |  |  |
Book value | [4] | ₩ 1,878 |  |  |  |
KOSTURE Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities | [3] | Coal recycling business |  |  |  |
Location |  | Korea |  |  |  |
Percentage of ownership | [3] | 0.26% |  |  |  |
Acquisition cost | [3] | ₩ 0 |  |  |  |
Book value | [3] | ₩ 0 |  |  |  |
Digital Innovation Growth Fund |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities | [5] | Holding company |  |  |  |
Location |  | Korea |  |  |  |
Percentage of ownership | [5] | 76.92% |  |  |  |
Acquisition cost | [5] | ₩ 10,000 |  |  |  |
Book value |  | ₩ 9,890 | [5] | 0 |  |
Taebaek Gadeoksan Wind Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  |  |  |
Location |  | Korea |  |  |  |
Percentage of ownership |  | 39.65% |  |  |  |
Acquisition cost |  | ₩ 12,570 |  |  |  |
Book value |  | ₩ 16,495 |  | 0 |  |
Chuncheon Green Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  |  |  |
Location |  | Korea |  |  |  |
Percentage of ownership | [6] | 68.00% |  |  |  |
Acquisition cost | [6] | ₩ 3,400 |  |  |  |
Book value |  | ₩ 3,372 | [6] | 0 |  |
Yeomsubong Wind Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  |  |  |
Location |  | Korea |  |  |  |
Percentage of ownership |  | 48.72% |  |  |  |
Acquisition cost |  | ₩ 95 |  |  |  |
Book value |  | ₩ 95 |  | 0 |  |
Yeongyang Wind Power Corporation II |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  |  |  |
Location |  | Korea |  |  |  |
Percentage of ownership |  | 30.00% |  |  |  |
Acquisition cost |  | ₩ 7,965 |  |  |  |
Book value |  | ₩ 7,965 |  | 0 |  |
Haeparang Energy Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  |  |  |
Location |  | Korea |  |  |  |
Percentage of ownership |  | 25.00% |  |  |  |
Acquisition cost |  | ₩ 2,241 |  |  |  |
Book value |  | ₩ 2,241 |  | 0 |  |
Saemangeum Sebit Power Plant Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Key operation activities |  | Power generation |  |  |  |
Location |  | Korea |  |  |  |
Percentage of ownership | [6] | 69.55% |  |  |  |
Acquisition cost | [6] | ₩ 6,000 |  |  |  |
Book value |  | 6,000 | [6] | 0 |  |
Daehan Wind Power PSC |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Unrecognized equity interest |  | (3,855) |  | 3,855 |  |
Accumulated unrecognized equity interest |  | 0 |  | 3,855 |  |
Nghi Son 2 Power LLC |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Unrecognized equity interest |  | (114,340) |  | 30,456 |  |
Accumulated unrecognized equity interest |  | 18,940 |  | 133,280 |  |
Barakah One Company |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Unrecognized equity interest |  | (26,502) |  | (46,758) |  |
Accumulated unrecognized equity interest |  | 42,836 |  | 69,338 |  |
Incheon New Power Co., Ltd. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Unrecognized equity interest |  | (31) |  | 194 |  |
Accumulated unrecognized equity interest |  | 163 |  | 194 |  |
KAPES, Inc. |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Unrecognized equity interest |  | 317 |  | 3,198 |  |
Accumulated unrecognized equity interest |  | 3,515 |  | 3,198 |  |
Chester Solar IV SpA |  |  |  |  |  |
Disclosure of associates [line items] |  |  |  |  |  |
Unrecognized equity interest |  | 21 |  | 0 |  |
Accumulated unrecognized equity interest |  | ₩ 21 |  | ₩ 0 |  |
[1] | The effective percentage of ownership is 22.02% considering treasury stocks.
[2] | According to the shareholders’ agreement, additional investment of 50% of total stake is agreed by March 2022.
[3] | The effective percentage of ownership is less than 20%. However, the Company can exercise significant influence by virtue of its contractual right to appoint directors to the board of directors of the entity, and by strict decision criteria of the Company’s financial and operating policy of the board of directors.
[4] | The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.
[5] | The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.
[6] | The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.

X
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- Definition The amount of investments in associates accounted for using the equity method. [Refer: Associates [member]; Investments accounted for using equity method] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard -URIDate 2021-03-24 + Details
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