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Details of non-controlling interest prior to intra-group eliminations (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Subsidiaries [Member] |  |  |
Disclosure - Details of non-controlling interest prior to intra-group eliminations [Line Items] |  |  |
Current assets of subsidiaries | ₩ 2,030,665 | ₩ 2,311,226 | ₩ 2,190,745
Non-current assets of subsidiaries | 4,165,052 | 3,978,658 | 3,831,694
Current liabilities of subsidiaries | (1,094,870) | (916,288) | (867,716)
Non-current liabilities of subsidiaries | (2,058,206) | (2,150,581) | (2,074,333)
Net assets of subsidiaries | 3,042,641 | 3,223,015 | 3,080,390
Book value of non-controlling interest | 1,502,377 | 1,412,707 | 1,456,618
Sales of subsidiaries | 2,739,186 | 2,550,576 | 2,511,444
Profit for the period of subsidiaries | 315,816 | 289,443 | 258,175
Profit for the period attributable to non-controlling interest of subsidiaries | 135,970 | 126,529 | 100,467
Cash flows from operating activities of subsidiaries | 414,012 | 375,934 | 326,620
Cash flows from investing activities of subsidiaries | (143,447) | (616,659) | (295,540)
Cash flows from financing activities before dividends to non-controlling interest of subsidiaries | (476,730) | 223,880 | 779,455
Dividends to non-controlling interest of subsidiaries | (110,331) | (86,108) | (116,437)
Effect of exchange rate fluctuation of subsidiaries | 4,051 | (33,006) | 8,018
Net increase (decrease) of cash and cash equivalents of subsidiaries | ₩ (312,445) | ₩ (135,959) | ₩ 702,116
KEPCO Ilijan Corporation |  |  |
Disclosure - Details of non-controlling interest prior to intra-group eliminations [Line Items] |  |  |
Percentage of noncontrolling interest | 49.00% | 49.00% | 49.00%
Current assets of subsidiaries | ₩ 163,622 | ₩ 160,588 | ₩ 154,758
Non-current assets of subsidiaries | 267,822 | 314,036 | 403,272
Current liabilities of subsidiaries | (16,819) | (21,546) | (19,256)
Non-current liabilities of subsidiaries | (36,594) | (36,255) | (39,193)
Net assets of subsidiaries | 378,031 | 416,823 | 499,581
Book value of non-controlling interest | 185,235 | 204,243 | 244,794
Sales of subsidiaries | 99,844 | 109,183 | 116,667
Profit for the period of subsidiaries | 49,631 | 66,320 | 51,552
Profit for the period attributable to non-controlling interest of subsidiaries | 24,319 | 32,497 | 25,260
Cash flows from operating activities of subsidiaries | 92,822 | 123,534 | 102,546
Cash flows from investing activities of subsidiaries | (4,452) | (5,276) | (117)
Cash flows from financing activities before dividends to non-controlling interest of subsidiaries | (53,733) | (44,442) | (56,863)
Dividends to non-controlling interest of subsidiaries | (51,626) | (48,855) | (55,705)
Effect of exchange rate fluctuation of subsidiaries | 2,840 | (7,432) | 1,529
Net increase (decrease) of cash and cash equivalents of subsidiaries | ₩ (14,149) | ₩ 17,529 | ₩ (8,610)
KEPCO Plant Service & Engineering |  |  |
Disclosure - Details of non-controlling interest prior to intra-group eliminations [Line Items] |  |  |
Percentage of noncontrolling interest | 49.00% | 49.00% | 49.00%
Current assets of subsidiaries | ₩ 628,725 | ₩ 623,934 | ₩ 553,924
Non-current assets of subsidiaries | 646,640 | 571,152 | 532,497
Current liabilities of subsidiaries | (270,097) | (278,562) | (264,506)
Non-current liabilities of subsidiaries | (26,331) | (16,127) | (36,984)
Net assets of subsidiaries | 978,937 | 900,397 | 784,931
Book value of non-controlling interest | 479,679 | 441,194 | 384,616
Sales of subsidiaries | 1,239,604 | 1,232,113 | 1,214,304
Profit for the period of subsidiaries | 160,791 | 135,482 | 86,657
Profit for the period attributable to non-controlling interest of subsidiaries | 78,788 | 66,386 | 42,462
Cash flows from operating activities of subsidiaries | 129,700 | 129,801 | 121,240
Cash flows from investing activities of subsidiaries | (123,593) | (193,408) | 79,807
Cash flows from financing activities before dividends to non-controlling interest of subsidiaries | (33,737) | (15,606) | (39,911)
Dividends to non-controlling interest of subsidiaries | (32,414) | (14,994) | (36,139)
Effect of exchange rate fluctuation of subsidiaries | (124) | (1,267) | 127
Net increase (decrease) of cash and cash equivalents of subsidiaries | ₩ (60,168) | ₩ (95,474) | ₩ 125,124
KEPCO Engineering & Construction Company |  |  |
Disclosure - Details of non-controlling interest prior to intra-group eliminations [Line Items] |  |  |
Percentage of noncontrolling interest | 33.92% | 33.92% | 33.92%
Current assets of subsidiaries | ₩ 281,390 | ₩ 257,529 | ₩ 270,553
Non-current assets of subsidiaries | 490,090 | 504,637 | 516,043
Current liabilities of subsidiaries | (248,402) | (221,860) | (286,444)
Non-current liabilities of subsidiaries | (61,698) | (83,274) | (78,232)
Net assets of subsidiaries | 461,380 | 457,032 | 421,920
Book value of non-controlling interest | 156,500 | 155,025 | 143,115
Sales of subsidiaries | 433,701 | 490,193 | 506,012
Profit for the period of subsidiaries | 12,937 | 21,222 | 17,796
Profit for the period attributable to non-controlling interest of subsidiaries | 4,388 | 7,199 | 6,036
Cash flows from operating activities of subsidiaries | 81,042 | 62,578 | 18,748
Cash flows from investing activities of subsidiaries | (50,569) | (8,622) | (7,556)
Cash flows from financing activities before dividends to non-controlling interest of subsidiaries | (14,591) | (55,504) | (1,634)
Dividends to non-controlling interest of subsidiaries | (2,839) | (1,419) | (2,539)
Effect of exchange rate fluctuation of subsidiaries | 31 | (101) | (854)
Net increase (decrease) of cash and cash equivalents of subsidiaries | 13,074 | (3,068) | 6,165
Others |  |  |
Disclosure - Details of non-controlling interest prior to intra-group eliminations [Line Items] |  |  |
Current assets of subsidiaries | 956,928 | 1,269,175 | 1,211,510
Non-current assets of subsidiaries | 2,760,500 | 2,588,833 | 2,379,882
Current liabilities of subsidiaries | (559,552) | (394,320) | (297,510)
Non-current liabilities of subsidiaries | (1,933,583) | (2,014,925) | (1,919,924)
Net assets of subsidiaries | 1,224,293 | 1,448,763 | 1,373,958
Book value of non-controlling interest | 680,963 | 612,245 | 684,093
Sales of subsidiaries | 966,037 | 719,087 | 674,461
Profit for the period of subsidiaries | 92,457 | 66,419 | 102,170
Profit for the period attributable to non-controlling interest of subsidiaries | 28,475 | 20,447 | 26,709
Cash flows from operating activities of subsidiaries | 110,448 | 60,021 | 84,086
Cash flows from investing activities of subsidiaries | 35,167 | (409,353) | (367,674)
Cash flows from financing activities before dividends to non-controlling interest of subsidiaries | (374,669) | 339,432 | 877,863
Dividends to non-controlling interest of subsidiaries | (23,452) | (20,840) | (22,054)
Effect of exchange rate fluctuation of subsidiaries | 1,304 | (24,206) | 7,216
Net increase (decrease) of cash and cash equivalents of subsidiaries | ₩ (251,202) | ₩ (54,946) | ₩ 579,437

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