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Details of non-controlling interest prior to intra-group eliminations (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Subsidiaries [Member] |  |  |
Disclosure - Details of non-controlling interest prior to intra-group eliminations [Line Items] |  |  |
Current assets of subsidiaries | ₩ 2,029,674 | ₩ 2,075,884 | ₩ 2,030,665
Non-current assets of subsidiaries | 4,638,564 | 4,421,596 | 4,165,052
Current liabilities of subsidiaries | (867,786) | (933,560) | (1,094,870)
Non-current liabilities of subsidiaries | (2,602,653) | (2,304,159) | (2,058,206)
Net assets of subsidiaries | 3,197,799 | 3,259,761 | 3,042,641
Book value of non-controlling interest | 1,370,166 | 1,393,331 | 1,502,377
Sales of subsidiaries | 2,769,001 | 2,643,343 | 2,739,186
Profit for the period of subsidiaries | 253,180 | 175,990 | 315,816
Profit for the period attributable to non-controlling interest of subsidiaries | 101,122 | 81,982 | 135,970
Cash flows from operating activities of subsidiaries | 452,206 | 512,611 | 414,012
Cash flows from investing activities of subsidiaries | (661,844) | (393,916) | (143,447)
Cash flows from financing activities before dividends to non-controlling interests of subsidiaries | 282,681 | 75,591 | (476,730)
Dividends to non-controlling interests of subsidiaries | (81,298) | (99,256) | (110,331)
Effect of exchange rate fluctuation of subsidiaries | (18,239) | 4,005 | 4,051
Net increase (decrease) of cash and cash equivalents of subsidiaries | ₩ (26,494) | ₩ 99,035 | ₩ (312,445)
KEPCO Ilijan Corporation |  |  |
Disclosure - Details of non-controlling interest prior to intra-group eliminations [Line Items] |  |  |
Percentage of ownership | 49.00% | 49.00% | 49.00%
Current assets of subsidiaries | ₩ 236,602 | ₩ 173,931 | ₩ 163,622
Non-current assets of subsidiaries | 85,464 | 197,446 | 267,822
Current liabilities of subsidiaries | (12,322) | (11,990) | (16,819)
Non-current liabilities of subsidiaries | (34,912) | (44,166) | (36,594)
Net assets of subsidiaries | 274,832 | 315,221 | 378,031
Book value of non-controlling interest | 134,668 | 154,458 | 185,235
Sales of subsidiaries | 81,400 | 95,072 | 99,844
Profit for the period of subsidiaries | 39,443 | 40,818 | 49,631
Profit for the period attributable to non-controlling interest of subsidiaries | 19,327 | 20,001 | 24,319
Cash flows from operating activities of subsidiaries | 121,835 | 101,707 | 92,822
Cash flows from investing activities of subsidiaries | 7,561 | 4,458 | (4,452)
Cash flows from financing activities before dividends to non-controlling interests of subsidiaries | (31,793) | (68,678) | (53,733)
Dividends to non-controlling interests of subsidiaries | (30,319) | (48,750) | (51,626)
Effect of exchange rate fluctuation of subsidiaries | (8,153) | 2,111 | 2,840
Net increase (decrease) of cash and cash equivalents of subsidiaries | ₩ 59,131 | ₩ (9,152) | ₩ (14,149)
KEPCO Plant Service & Engineering Co., Ltd. |  |  |
Disclosure - Details of non-controlling interest prior to intra-group eliminations [Line Items] |  |  |
Percentage of ownership | 49.00% | 49.00% | 49.00%
Current assets of subsidiaries | ₩ 755,454 | ₩ 779,764 | ₩ 628,725
Non-current assets of subsidiaries | 590,403 | 577,219 | 646,640
Current liabilities of subsidiaries | (254,495) | (247,737) | (270,097)
Non-current liabilities of subsidiaries | (42,020) | (47,020) | (26,331)
Net assets of subsidiaries | 1,049,342 | 1,062,226 | 978,937
Book value of non-controlling interest | 514,177 | 520,491 | 479,679
Sales of subsidiaries | 1,299,186 | 1,244,613 | 1,239,604
Profit for the period of subsidiaries | 85,916 | 157,737 | 160,791
Profit for the period attributable to non-controlling interest of subsidiaries | 42,099 | 77,291 | 78,788
Cash flows from operating activities of subsidiaries | 74,159 | 164,373 | 129,700
Cash flows from investing activities of subsidiaries | 26,748 | (89,159) | (123,593)
Cash flows from financing activities before dividends to non-controlling interests of subsidiaries | (47,809) | (44,332) | (33,737)
Dividends to non-controlling interests of subsidiaries | (42,336) | (39,466) | (32,414)
Effect of exchange rate fluctuation of subsidiaries | (2,171) | (593) | (124)
Net increase (decrease) of cash and cash equivalents of subsidiaries | ₩ 8,591 | ₩ (9,177) | ₩ (60,168)
KEPCO Engineering & Construction Company, Inc. |  |  |
Disclosure - Details of non-controlling interest prior to intra-group eliminations [Line Items] |  |  |
Percentage of ownership | 33.92% | 33.92% | 33.92%
Current assets of subsidiaries | ₩ 235,805 | ₩ 257,593 | ₩ 281,390
Non-current assets of subsidiaries | 463,439 | 477,614 | 490,090
Current liabilities of subsidiaries | (186,296) | (223,522) | (248,402)
Non-current liabilities of subsidiaries | (13,873) | (19,472) | (61,698)
Net assets of subsidiaries | 499,075 | 492,213 | 461,380
Book value of non-controlling interest | 169,286 | 166,959 | 156,500
Sales of subsidiaries | 431,723 | 448,635 | 433,701
Profit for the period of subsidiaries | 20,160 | 26,398 | 12,937
Profit for the period attributable to non-controlling interest of subsidiaries | 6,838 | 8,954 | 4,388
Cash flows from operating activities of subsidiaries | 15,225 | 27,081 | 81,042
Cash flows from investing activities of subsidiaries | (34,333) | 47,219 | (50,569)
Cash flows from financing activities before dividends to non-controlling interests of subsidiaries | (9,165) | (34,632) | (14,591)
Dividends to non-controlling interests of subsidiaries | (4,000) | (1,807) | (2,839)
Effect of exchange rate fluctuation of subsidiaries | (22) | (14) | 31
Net increase (decrease) of cash and cash equivalents of subsidiaries | (32,295) | 37,847 | 13,074
Others |  |  |
Disclosure - Details of non-controlling interest prior to intra-group eliminations [Line Items] |  |  |
Current assets of subsidiaries | 801,813 | 864,596 | 956,928
Non-current assets of subsidiaries | 3,499,258 | 3,169,317 | 2,760,500
Current liabilities of subsidiaries | (414,673) | (450,311) | (559,552)
Non-current liabilities of subsidiaries | (2,511,848) | (2,193,501) | (1,933,583)
Net assets of subsidiaries | 1,374,550 | 1,390,101 | 1,224,293
Book value of non-controlling interest | 552,035 | 551,423 | 680,963
Sales of subsidiaries | 956,692 | 855,023 | 966,037
Profit for the period of subsidiaries | 107,661 | (48,963) | 92,457
Profit for the period attributable to non-controlling interest of subsidiaries | 32,858 | (24,264) | 28,475
Cash flows from operating activities of subsidiaries | 240,987 | 219,450 | 110,448
Cash flows from investing activities of subsidiaries | (661,820) | (356,434) | 35,167
Cash flows from financing activities before dividends to non-controlling interests of subsidiaries | 371,448 | 223,233 | (374,669)
Dividends to non-controlling interests of subsidiaries | (4,643) | (9,233) | (23,452)
Effect of exchange rate fluctuation of subsidiaries | (7,893) | 2,501 | 1,304
Net increase (decrease) of cash and cash equivalents of subsidiaries | ₩ (61,921) | ₩ 79,517 | ₩ (251,202)

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