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Investments in Joint Ventures (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of joint ventures [Line Items]    
Acquisition cost ₩ 1,647,317 ₩ 1,469,978
Book value [Abstract]    
Beginning balance 1,493,275 1,418,196
Acquisition 237,142 121,244
Disposal (1,632) 0
Dividends received (102,126) (74,918)
Share of income (loss) 147,092 130,941
Other comprehensive income (loss) 40,985 (101,175)
Others (book value) (1,211) (1,013)
Ending balance ₩ 1,813,525 ₩ 1,493,275
KEPCO-Uhde Inc.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation [1] Power generation [2]
Location KOREA [1] KOREA [2]
Percentage of ownership [3] 52.80% [1] 52.80% [2]
Acquisition cost ₩ 11,355 [1] ₩ 11,355 [2]
Book value [Abstract]    
Beginning balance 258 [2] 301
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (70) (43)
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 188 [1] 258 [2]
Share in net assets 188 258
Total assets 403 515
Total liabilities 34 7
Net assets 369 508
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 18 0
Profit (loss) for the period of JointVentures ₩ (139) ₩ (86)
Eco Biomass Energy Sdn. Bhd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation [1] Power generation [2]
Location MALAYSIA [1] MALAYSIA [2]
Percentage of ownership [3] 61.53% [1] 61.53% [2]
Acquisition cost ₩ 14,439 [1] ₩ 14,439 [2]
Book value [Abstract]    
Beginning balance 0 [2] 0
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 0 0
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 0 [1] ₩ 0 [2]
Share in net assets 0  
Total assets 0  
Total liabilities 0  
Investment differential 0  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of JointVentures 0  
Profit (loss) for the period of JointVentures ₩ 0  
Datang Chaoyang Renewable Power Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location CHINA CHINA
Percentage of ownership [3]   40.00%
Acquisition cost   ₩ 27,660
Book value [Abstract]    
Beginning balance ₩ 27,262 28,239
Acquisition 0 [4] 0
Disposal 0 [4] 0
Dividends received 0 [4] (839)
Share of income (loss) 743 [4] 840
Other comprehensive income (loss) 1,009 [4] (978)
Others (book value) (29,014) [4] 0
Ending balance ₩ 0 [4] 27,262
Share in net assets   27,262
Total assets   138,463
Total liabilities   70,309
Net assets   68,154
Sales of JointVentures   17,776
Profit (loss) for the period of JointVentures   ₩ 2,149
Shuweihat Asia Power Investment B.V.    
Disclosure of joint ventures [Line Items]    
Key operation activities Holding company Holding company
Location NETHERLANDS NETHERLANDS
Percentage of ownership [3] 49.00% 49.00%
Acquisition cost ₩ 44,405 ₩ 46,037
Book value [Abstract]    
Beginning balance 15,675 0
Acquisition 0 0
Disposal (1,632) 0
Dividends received (499) (1,707)
Share of income (loss) 3,075 4,275
Other comprehensive income (loss) 10,632 12,457
Others (book value) 0 650
Ending balance 27,251 15,675
Share in net assets 27,251 15,675
Total assets 55,614 32,001
Total liabilities 0 10
Net assets 1,441 31,991
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 0 0
Profit (loss) for the period of JointVentures ₩ (187) ₩ (170)
Shuweihat Asia Operation & Maintenance Company    
Disclosure of joint ventures [Line Items]    
Key operation activities Maintenance of utility plant [1] Maintenance of utility plant [2]
Location CAYMAN [1] CAYMAN [2]
Percentage of ownership [3] 55.00% [1] 55.00% [2]
Acquisition cost ₩ 30 [1] ₩ 30 [2]
Book value [Abstract]    
Beginning balance 663 [2] 450
Acquisition 0 0
Disposal 0 0
Dividends received (859) (770)
Share of income (loss) 946 1,055
Other comprehensive income (loss) 42 (172)
Others (book value) 0 100
Ending balance 792 [1] 663 [2]
Share in net assets 793 663
Total assets 1,472 1,220
Total liabilities 31 14
Net assets   1,206
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) (1) 0
Sales of JointVentures 2,391 2,580
Profit (loss) for the period of JointVentures ₩ 1,719 ₩ 1,918
Waterbury Lake Uranium L.P.    
Disclosure of joint ventures [Line Items]    
Key operation activities Resources development Resources development
Location CANADA CANADA
Percentage of ownership [3] 34.07% 35.76%
Acquisition cost ₩ 26,602 ₩ 26,602
Book value [Abstract]    
Beginning balance 19,781 21,314
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (3) (23)
Other comprehensive income (loss) (746) (949)
Others (book value) 0 (561)
Ending balance 19,032 19,781
Share in net assets 19,032 19,780
Total assets 55,933 55,563
Total liabilities 64 250
Net assets 55,869 55,313
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 1
Sales of JointVentures 0 0
Profit (loss) for the period of JointVentures ₩ 0 ₩ 0
ASM-BG Investicii AD    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location BULGARIA BULGARIA
Percentage of ownership [3] 50.00% 50.00%
Acquisition cost ₩ 16,101 ₩ 16,101
Book value [Abstract]    
Beginning balance 21,202 21,488
Acquisition 0 0
Disposal 0 0
Dividends received (1,039) (946)
Share of income (loss) 2,236 (150)
Other comprehensive income (loss) (1,020) 810
Others (book value) 0 0
Ending balance 21,379 21,202
Share in net assets 21,379 21,202
Total assets 84,924 87,110
Total liabilities 42,166 44,706
Net assets 42,758 42,404
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 12,745 12,611
Profit (loss) for the period of JointVentures ₩ 4,406 ₩ (262)
RES Technology AD    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location BULGARIA BULGARIA
Percentage of ownership [3] 50.00% 50.00%
Acquisition cost ₩ 15,595 ₩ 15,595
Book value [Abstract]    
Beginning balance 14,375 13,582
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 812 1,053
Other comprehensive income (loss) 22 (260)
Others (book value) 0 0
Ending balance 15,209 14,375
Share in net assets 15,209 14,375
Total assets 69,609 71,595
Total liabilities 39,192 42,845
Net assets 30,417 28,750
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 7,879 7,793
Profit (loss) for the period of JointVentures ₩ 1,567 ₩ 2,164
KV Holdings, Inc.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location PHILIPPINES PHILIPPINES
Percentage of ownership [3] 40.00% 40.00%
Acquisition cost ₩ 2,103 ₩ 2,103
Book value [Abstract]    
Beginning balance 1,918 2,098
Acquisition 0 0
Disposal 0 0
Dividends received (735) 0
Share of income (loss) 772 61
Other comprehensive income (loss) (37) (241)
Others (book value) 0 0
Ending balance 1,918 1,918
Share in net assets 1,918 1,918
Total assets 4,795 4,795
Total liabilities 0 0
Net assets 4,795 4,795
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 8 671
Profit (loss) for the period of JointVentures ₩ 1,257 ₩ 677
KEPCO SPC Power Corporation    
Disclosure of joint ventures [Line Items]    
Key operation activities Construction and operation of utility plant [1] Construction and operation of utility plant [2]
Location PHILIPPINES [1] PHILIPPINES [2]
Percentage of ownership [3] 75.20% [1] 75.20% [2]
Acquisition cost ₩ 94,579 [1] ₩ 94,579 [2]
Book value [Abstract]    
Beginning balance 217,094 [2] 245,367
Acquisition 0 0
Disposal 0 0
Dividends received (41,601) (37,443)
Share of income (loss) 44,909 42,359
Other comprehensive income (loss) (12,092) (33,230)
Others (book value) (4) 41
Ending balance 208,306 [1] 217,094 [2]
Share in net assets 208,306 217,094
Total assets 312,093 318,911
Total liabilities 35,091 30,222
Net assets 277,002 288,689
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 184,046 186,725
Profit (loss) for the period of JointVentures ₩ 59,543 ₩ 57,364
Gansu Datang Yumen Wind Power Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location CHINA CHINA
Percentage of ownership [3] 40.00% 40.00%
Acquisition cost ₩ 16,621 ₩ 16,621
Book value [Abstract]    
Beginning balance 10,840 12,821
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (818) (1,299)
Other comprehensive income (loss) (41) (682)
Others (book value) 0 0
Ending balance 9,981 10,840
Share in net assets 9,981 10,840
Total assets 79,354 81,960
Total liabilities 54,402 54,859
Net assets 24,952 27,101
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 8,323 6,938
Profit (loss) for the period of JointVentures ₩ (2,046) ₩ (3,253)
Datang Chifeng Renewable Power    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location CHINA CHINA
Percentage of ownership [3] 40.00% 40.00%
Acquisition cost ₩ 121,928 ₩ 121,928
Book value [Abstract]    
Beginning balance 171,055 166,535
Acquisition 0 0
Disposal 0 0
Dividends received (18,859) 0
Share of income (loss) 14,808 14,079
Other comprehensive income (loss) (842) (9,559)
Others (book value) 0 0
Ending balance 166,162 171,055
Share in net assets 166,211 171,105
Total assets 751,551 762,605
Total liabilities 336,024 334,843
Net assets 415,527 427,762
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) (49) (50)
Sales of JointVentures 117,270 113,329
Profit (loss) for the period of JointVentures ₩ 37,159 ₩ 35,294
Datang KEPCO Chaoyang Renewable Power Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location CHINA CHINA
Percentage of ownership [3] 40.00% 40.00%
Acquisition cost ₩ 10,858 ₩ 10,858
Book value [Abstract]    
Beginning balance 11,060 10,843
Acquisition 0 [4] 0
Disposal 0 [4] 0
Dividends received 0 [4] 0
Share of income (loss) 582 [4] 837
Other comprehensive income (loss) (1,214) [4] (620)
Others (book value) 29,014 [4] 0
Ending balance 39,442 [4] 11,060
Share in net assets 39,442 11,060
Total assets 190,951 60,913
Total liabilities 92,347 33,264
Net assets 98,604 27,649
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 18,824 8,442
Profit (loss) for the period of JointVentures ₩ 2,557 ₩ 2,094
Rabigh Electricity Company    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location SAUDI ARABIA SAUDI ARABIA
Percentage of ownership [3] 40.00% 40.00%
Acquisition cost ₩ 109,743 ₩ 109,743
Book value [Abstract]    
Beginning balance 99,356 97,802
Acquisition 0 0
Disposal 0 0
Dividends received (29,067) (18,112)
Share of income (loss) 13,305 35,769
Other comprehensive income (loss) 22,371 (15,227)
Others (book value) (637) (876)
Ending balance 105,328 99,356
Share in net assets 178,256 171,248
Total assets 2,448,690 2,364,522
Total liabilities 2,003,050 1,936,403
Net assets 445,640 428,119
Investment differential 0 0
Intercompany transaction (70,977) (70,978)
Others (consolidated FS) (1,951) (914)
Sales of JointVentures 274,184 287,105
Profit (loss) for the period of JointVentures ₩ 38,789 ₩ 78,948
Rabigh Operation & Maintenance Company    
Disclosure of joint ventures [Line Items]    
Key operation activities Maintenance of utility plant Maintenance of utility plant
Location SAUDI ARABIA SAUDI ARABIA
Percentage of ownership [3] 40.00% 40.00%
Acquisition cost ₩ 70 ₩ 70
Book value [Abstract]    
Beginning balance 3,987 4,427
Acquisition 0 0
Disposal 0 0
Dividends received (1,147) (2,130)
Share of income (loss) 2,820 2,236
Other comprehensive income (loss) 174 (546)
Others (book value) 0 0
Ending balance 5,834 3,987
Share in net assets 5,834 3,987
Total assets 26,172 19,992
Total liabilities 11,587 10,025
Net assets 14,585 9,967
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 26,387 22,668
Profit (loss) for the period of JointVentures ₩ 7,173 ₩ 5,668
Jamaica Public Service Company Limited    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location JAMAICA JAMAICA
Percentage of ownership [3] 40.00% 40.00%
Acquisition cost ₩ 301,910 ₩ 301,910
Book value [Abstract]    
Beginning balance 221,153 249,453
Acquisition 0 0
Disposal 0 0
Dividends received (4,472) 0
Share of income (loss) 13,099 0
Other comprehensive income (loss) 9,852 (28,300)
Others (book value) 0 0
Ending balance 239,632 221,153
Share in net assets 227,434 209,464
Total assets 1,396,421 1,276,279
Total liabilities 827,837 752,617
Net assets 568,584 523,662
Investment differential (80,161) (80,161)
Intercompany transaction 0 0
Others (consolidated FS) 92,359 91,850
Sales of JointVentures 992,677 946,365
Profit (loss) for the period of JointVentures ₩ 32,507 ₩ 24,601
KW Nuclear Components Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Manufacturing Manufacturing
Location KOREA KOREA
Percentage of ownership [3] 45.00% 45.00%
Acquisition cost ₩ 833 ₩ 833
Book value [Abstract]    
Beginning balance 6,703 7,133
Acquisition 0 0
Disposal 0 0
Dividends received (208) (208)
Share of income (loss) 1,213 (222)
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 7,708 6,703
Share in net assets 7,884 6,962
Total assets 24,598 25,693
Total liabilities 7,077 10,221
Net assets 17,521 15,472
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) (176) (259)
Sales of JointVentures 6,031 6,486
Profit (loss) for the period of JointVentures ₩ 2,543 ₩ 1,493
Busan Shinho Solar Power Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location KOREA KOREA
Percentage of ownership [3] 25.00% 25.00%
Acquisition cost ₩ 2,100 ₩ 2,100
Book value [Abstract]    
Beginning balance 4,346 3,814
Acquisition 0 0
Disposal 0 0
Dividends received (340) (63)
Share of income (loss) 755 595
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 4,761 4,346
Share in net assets 4,761 4,346
Total assets 45,538 47,959
Total liabilities 26,494 30,573
Net assets 19,044 17,386
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 7,901 7,984
Profit (loss) for the period of JointVentures ₩ 3,018 ₩ 2,383
GS Donghae Electric Power Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location KOREA KOREA
Percentage of ownership [3] 34.00% 34.00%
Acquisition cost ₩ 204,000 ₩ 204,000
Book value [Abstract]    
Beginning balance 220,727 205,948
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 20,061 14,714
Other comprehensive income (loss) 0 0
Others (book value) (197) 65
Ending balance 240,591 220,727
Share in net assets 240,591 220,727
Total assets 2,259,129 2,179,465
Total liabilities 1,551,509 1,530,266
Net assets 707,620 649,199
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 787,425 351,814
Profit (loss) for the period of JointVentures ₩ 58,976 ₩ 43,180
Global Trade Of Power System Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Exporting products and technology of small or medium business by proxy Exporting products and technology of small or medium business by proxy
Location KOREA KOREA
Percentage of ownership [3] 29.00% 29.00%
Acquisition cost ₩ 290 ₩ 290
Book value [Abstract]    
Beginning balance 577 477
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (62) 100
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 515 577
Share in net assets 515 577
Total assets 2,039 3,576
Total liabilities 263 1,586
Net assets 1,776 1,990
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 1,368 4,079
Profit (loss) for the period of JointVentures ₩ (134) ₩ 365
Expressway Solar-light Power Generation Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location KOREA KOREA
Percentage of ownership [3] 29.00% 29.00%
Acquisition cost ₩ 1,856 ₩ 1,856
Book value [Abstract]    
Beginning balance 2,463 2,343
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 213 120
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 2,676 2,463
Share in net assets 2,676 2,463
Total assets 18,443 19,143
Total liabilities 9,215 10,651
Net assets 9,228 8,492
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 2,986 3,018
Profit (loss) for the period of JointVentures 692 ₩ 643
KODE NOVUS I LLC    
Disclosure of joint ventures [Line Items]    
Key operation activities   Power generation
Location   USA
Percentage of ownership [3]   50.00%
Acquisition cost   ₩ 19,213
Book value [Abstract]    
Beginning balance 0 0
Acquisition 0 [5] 0
Disposal 0 [5] 0
Dividends received 0 [5] 0
Share of income (loss) 1,374 [5] 0
Other comprehensive income (loss) (1,374) [5] 0
Others (book value) 0 [5] 0
Ending balance 0 [5] 0
Share in net assets   (53,689)
Total assets   755
Total liabilities   108,132
Net assets 0 (107,377)
Investment differential   0
Intercompany transaction   0
Others (consolidated FS)   53,689
Sales of JointVentures   14
Profit (loss) for the period of JointVentures   (8,117)
Unrecognized equity interest 0 8,706
Accumulated unrecognized equity interest 0 ₩ 53,689
KODE NOVUS II LLC    
Disclosure of joint ventures [Line Items]    
Key operation activities   Power generation
Location   USA
Percentage of ownership [3]   50.00%
Acquisition cost   ₩ 12,756
Book value [Abstract]    
Beginning balance 0 0
Acquisition 0 [6] 0
Disposal 0 [6] 0
Dividends received 0 [6] 0
Share of income (loss) 810 [6] 0
Other comprehensive income (loss) (810) [6] 0
Others (book value) 0 [6] 0
Ending balance 0 [6] 0
Share in net assets   (23,696)
Total assets   292
Total liabilities   47,683
Net assets 0 (47,391)
Investment differential   0
Intercompany transaction   0
Others (consolidated FS)   23,696
Profit (loss) for the period of JointVentures   (6,018)
Unrecognized equity interest 0 181
Accumulated unrecognized equity interest ₩ 0 ₩ 23,696
Daejung Offshore Wind Power Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location KOREA KOREA
Percentage of ownership [3] 49.90% 49.90%
Acquisition cost ₩ 5,190 ₩ 5,190
Book value [Abstract]    
Beginning balance 2,969 3,015
Acquisition 0 200
Disposal 0 0
Dividends received 0 0
Share of income (loss) (300) (246)
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 2,669 2,969
Share in net assets 2,669 2,969
Total assets 6,440 6,193
Total liabilities 1,091 243
Net assets 5,349 5,950
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 0 0
Profit (loss) for the period of JointVentures ₩ (590) ₩ (493)
Shareholders' agreements that may cause future economic resource or cash outflows In case Samsung Heavy Industries Co., Ltd., a co-participant of the joint venture agreement, decides to dispose of its shares in Daejung Offshore Wind Power Co., Ltd., the Company is obligated to acquire those shares after evaluating the economic feasibility of the facilities installed by Samsung Heavy Industries Co., Ltd. In case Samsung Heavy Industries Co., Ltd., a co-participant of the joint venture agreement, decides to dispose of its shares in Daejung Offshore Wind Power Co., Ltd., the Company is obligated to acquire those shares after evaluating the economic feasibility of the facilities installed by Samsung Heavy Industries Co., Ltd.
Amman Asia Electric Power Company    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation [1] Power generation [2]
Location JORDAN [1] JORDAN [2]
Percentage of ownership [3] 60.00% [1] 60.00% [2]
Acquisition cost ₩ 111,476 [1] ₩ 111,476 [2]
Book value [Abstract]    
Beginning balance 145,676 [2] 153,857
Acquisition 0 0
Disposal 0 0
Dividends received 0 (12,213)
Share of income (loss) 19,604 19,957
Other comprehensive income (loss) 12,077 (15,925)
Others (book value) 0 0
Ending balance 177,357 [1] 145,676 [2]
Share in net assets 177,445 145,764
Total assets 792,532 759,114
Total liabilities 496,791 516,174
Net assets 295,741 242,940
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) (88) (88)
Sales of JointVentures 23,676 18,034
Profit (loss) for the period of JointVentures ₩ 32,674 ₩ 33,514
KAPES, Inc.    
Disclosure of joint ventures [Line Items]    
Key operation activities R&D [1] R&D [2]
Location KOREA [1] KOREA [2]
Percentage of ownership [3] 51.00% [1] 51.00% [2]
Acquisition cost ₩ 5,629 [1] ₩ 5,629 [2]
Book value [Abstract]    
Beginning balance 7,476 [2] 4,758
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 1,543 2,752
Other comprehensive income (loss) 0 0
Others (book value) 60 (34)
Ending balance 9,079 [1] 7,476 [2]
Share in net assets 9,079 7,476
Total assets 82,494 70,679
Total liabilities 64,691 56,021
Net assets 17,803 14,658
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 57,047 129,962
Profit (loss) for the period of JointVentures ₩ 4,710 ₩ 5,397
Dangjin Eco Power Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location KOREA KOREA
Percentage of ownership [3] 34.00% 34.00%
Acquisition cost ₩ 61,540 ₩ 61,540
Book value [Abstract]    
Beginning balance 57,928 53,253
Acquisition 0 5,440
Disposal 0 0
Dividends received 0 0
Share of income (loss) (38,042) (752)
Other comprehensive income (loss) (65) (3)
Others (book value) 91 (10)
Ending balance 19,912 57,928
Share in net assets 17,294 55,310
Total assets 51,125 163,197
Total liabilities 260 521
Net assets 50,865 162,676
Investment differential 2,618 2,618
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 0  
Profit (loss) for the period of JointVentures ₩ (111,789) ₩ (2,182)
Honam Wind Power Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location KOREA KOREA
Percentage of ownership [3] 29.00% 29.00%
Acquisition cost ₩ 3,480 ₩ 3,480
Book value [Abstract]    
Beginning balance 4,302 4,451
Acquisition 0 0
Disposal 0 0
Dividends received (348) (487)
Share of income (loss) 906 338
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 4,860 4,302
Share in net assets 4,828 4,270
Total assets 43,713 39,675
Total liabilities 27,066 24,951
Net assets 16,647 14,724
Investment differential 32 32
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 7,700 5,961
Profit (loss) for the period of JointVentures ₩ 3,122 ₩ 1,166
Chun-cheon Energy Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location KOREA KOREA
Percentage of ownership [3] 29.90% 29.90%
Acquisition cost ₩ 52,700 ₩ 52,700
Book value [Abstract]    
Beginning balance 48,118 50,592
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (5,613) (2,474)
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 42,505 48,118
Share in net assets 42,502 48,115
Total assets 666,050 699,652
Total liabilities 523,904 538,733
Net assets 142,146 160,919
Investment differential 3 3
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 320,950 164,294
Profit (loss) for the period of JointVentures ₩ (19,133) ₩ (8,145)
Yeonggwangbaeksu Wind Power Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities [7] Power generation Power generation
Location [7] KOREA KOREA
Percentage of ownership [3],[7] 15.00% 15.00%
Acquisition cost [7] ₩ 3,000 ₩ 3,000
Book value [Abstract]    
Beginning balance 2,734 [7] 2,689
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 109 45
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance [7] 2,843 2,734
Share in net assets 2,837 2,728
Total assets 99,368 94,810
Total liabilities 80,450 76,621
Net assets 18,918 18,189
Investment differential 6 6
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 11,366 11,124
Profit (loss) for the period of JointVentures ₩ 734 ₩ 297
Nghi Son 2 Power LLC    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location VIETNAM VIETNAM
Percentage of ownership [3] 50.00% 50.00%
Acquisition cost ₩ 2,781 ₩ 2,781
Book value [Abstract]    
Beginning balance 183 229
Acquisition 0 993
Disposal 0 0
Dividends received 0 0
Share of income (loss) 2,657 (1,039)
Other comprehensive income (loss) (2,840) 0
Others (book value) 0 0
Ending balance 0 183
Share in net assets (41,660) 183
Total assets 477,947 741
Total liabilities 561,266 376
Net assets (83,319) 365
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 41,660 0
Sales of JointVentures 144,381  
Profit (loss) for the period of JointVentures 8,979 (2,068)
Unrecognized equity interest 41,659 0
Accumulated unrecognized equity interest ₩ 41,659 ₩ 0
Kelar S.A    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation [1] Power generation [2]
Location CHILE [1] CHILE [2]
Percentage of ownership [3] 65.00% [1] 65.00% [2]
Acquisition cost ₩ 78,060 [1] ₩ 77,220 [2]
Book value [Abstract]    
Beginning balance 67,233 [2] 0
Acquisition 0 73,040
Disposal 0 0
Dividends received 0 0
Share of income (loss) 2,732 (633)
Other comprehensive income (loss) 2,859 (5,175)
Others (book value) 0 1
Ending balance 72,824 [1] 67,233 [2]
Share in net assets 70,246 65,125
Total assets 626,206 613,293
Total liabilities 518,135 513,101
Net assets 108,071 100,192
Investment differential 2,470 2,424
Intercompany transaction 0 0
Others (consolidated FS) 108 (316)
Sales of JointVentures 87,507 90,435
Profit (loss) for the period of JointVentures 8,587 17,590
Unrecognized equity interest 0 (61,309)
Accumulated unrecognized equity interest ₩ 0 ₩ 0
PT. Tanjung Power Indonesia    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location INDONESIA INDONESIA
Percentage of ownership [3] 35.00% 35.00%
Acquisition cost ₩ 746 ₩ 746
Book value [Abstract]    
Beginning balance 1,776 1,946
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 3,373 2,112
Other comprehensive income (loss) 1,928 (2,281)
Others (book value) 4 (1)
Ending balance 7,081 1,776
Share in net assets 7,081 1,776
Total assets 505,551 374,702
Total liabilities 485,321 369,627
Net assets 20,230 5,075
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 109,029 209,923
Profit (loss) for the period of JointVentures ₩ 9,717 ₩ 6,219
Incheon New Power Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location KOREA KOREA
Percentage of ownership [3] 29.00% 29.00%
Acquisition cost ₩ 461 ₩ 461
Book value [Abstract]    
Beginning balance 619 563
Acquisition 0 0
Disposal 0 0
Dividends received (41) 0
Share of income (loss) 1 56
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 579 619
Share in net assets 579 619
Total assets 6,559 7,194
Total liabilities 4,563 5,059
Net assets 1,996 2,135
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 2,687 2,972
Profit (loss) for the period of JointVentures ₩ 3 ₩ 184
Seokmun Energy Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location KOREA KOREA
Percentage of ownership [3] 29.00% 29.00%
Acquisition cost ₩ 15,370 ₩ 15,370
Book value [Abstract]    
Beginning balance 13,786 391
Acquisition 0 14,790
Disposal 0 0
Dividends received 0 0
Share of income (loss) 2,965 (1,219)
Other comprehensive income (loss) 0 (176)
Others (book value) 0 0
Ending balance 16,751 13,786
Share in net assets 16,751 13,786
Total assets 253,544 247,735
Total liabilities 195,782 200,197
Net assets 57,762 47,538
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 50,052 35,135
Profit (loss) for the period of JointVentures ₩ 10,224 ₩ (3,939)
Daehan Wind Power PSC    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location JORDAN JORDAN
Percentage of ownership [3] 50.00% 50.00%
Acquisition cost ₩ 3,191 ₩ 285
Book value [Abstract]    
Beginning balance 0 16
Acquisition 2,288 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (1,311) (40)
Other comprehensive income (loss) 37 22
Others (book value) 618 2
Ending balance 1,632 0
Share in net assets 1,632 (412)
Total assets 33,081 928
Total liabilities 29,817 1,752
Net assets 3,264 (824)
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 412
Sales of JointVentures 0  
Profit (loss) for the period of JointVentures (1,799) (904)
Unrecognized equity interest (412) 412
Accumulated unrecognized equity interest ₩ 0 ₩ 412
Barakah One Company    
Disclosure of joint ventures [Line Items]    
Key operation activities [8] Power generation Power generation
Location [8] UAE UAE
Percentage of ownership [3],[8] 18.00% 18.00%
Acquisition cost [8] ₩ 118 ₩ 118
Book value [Abstract]    
Beginning balance 626 [8] 116
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 2,162 570
Other comprehensive income (loss) 1,019 (60)
Others (book value) 0 0
Ending balance [8] 3,807 626
Share in net assets 3,807 626
Total assets 21,480,187 17,574,885
Total liabilities 21,459,035 17,571,409
Net assets 21,152 3,476
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 0  
Profit (loss) for the period of JointVentures ₩ (3,062) ₩ (1,358)
Nawah Energy Company    
Disclosure of joint ventures [Line Items]    
Key operation activities [8] Operation of utility plant Operation of utility plant
Location [8] UAE UAE
Percentage of ownership [3],[8] 18.00% 18.00%
Acquisition cost [8] ₩ 296 ₩ 296
Book value [Abstract]    
Beginning balance 258 [8] 290
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 4 (5)
Other comprehensive income (loss) 12 (27)
Others (book value) 0 0
Ending balance [8] 274 258
Share in net assets 274 258
Total assets 70,386 1,459
Total liabilities 68,864 23
Net assets 1,522 1,436
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 0 0
Profit (loss) for the period of JointVentures ₩ 0 ₩ (11)
MOMENTUM    
Disclosure of joint ventures [Line Items]    
Key operation activities International thermonuclear experimental reactor construction management International thermonuclear experimental reactor construction management
Location FRANCE FRANCE
Percentage of ownership [3] 33.33% 33.33%
Acquisition cost ₩ 1 ₩ 1
Book value [Abstract]    
Beginning balance 391 67
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 195 321
Other comprehensive income (loss) (4) 3
Others (book value) 0 0
Ending balance 582 391
Share in net assets 582 391
Total assets 7,476 5,028
Total liabilities 5,730 3,854
Net assets 1,746 1,174
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 16,933 11,555
Profit (loss) for the period of JointVentures ₩ 520 ₩ 939
Daegu Green Power    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location KOREA KOREA
Percentage of ownership [3] 29.00% 29.00%
Acquisition cost ₩ 46,225 ₩ 46,225
Book value [Abstract]    
Beginning balance 42,391 47,528
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (1,283) (5,133)
Other comprehensive income (loss) 0 0
Others (book value) 2 (4)
Ending balance 41,110 42,391
Share in net assets 19,514 20,795
Total assets 591,263 602,809
Total liabilities 523,972 531,103
Net assets 67,291 71,706
Investment differential 84 0
Intercompany transaction 0 84
Others (consolidated FS) 21,512 21,512
Sales of JointVentures 291,734 256,359
Profit (loss) for the period of JointVentures ₩ (4,424) ₩ (17,700)
Significant restrictions on its abilities Principals on subordinated loans or dividends can only be paid when all conditions of the loan agreement are satisfied or prior written consent of financial institutions is obtained. Shares cannot be wholly or partially transferred without prior written consent of financial institutions is obtained. Principals on subordinated loans or dividends can only be paid when all conditions of the loan agreement are satisfied or prior written consent of financial institutions is obtained. Shares cannot be wholly or partially transferred without prior written consent of financial institutions is obtained.
Yeonggwang Wind Power Co., Ltd    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location KOREA KOREA
Percentage of ownership [3] 41.00% 41.00%
Acquisition cost ₩ 15,375 ₩ 15,375
Book value [Abstract]    
Beginning balance 15,294 0
Acquisition 0 15,375
Disposal 0 0
Dividends received 0 0
Share of income (loss) 10 (25)
Other comprehensive income (loss) 0 (56)
Others (book value) 0 0
Ending balance 15,304 15,294
Share in net assets 15,074 15,063
Total assets 255,777 212,802
Total liabilities 219,013 176,062
Net assets 36,764 36,740
Investment differential 230 231
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 0 0
Profit (loss) for the period of JointVentures ₩ (145) ₩ (62)
Chester Solar IV SpA    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation [1] Power generation [2]
Location CHILE [1] CHILE [2]
Percentage of ownership [3] 81.82% [1] 81.82% [2]
Acquisition cost ₩ 1,700 [1] ₩ 1,700 [2]
Book value [Abstract]    
Beginning balance 1,700 [2] 0
Acquisition 0 1,700
Disposal 0 0
Dividends received 0 0
Share of income (loss) 301 0
Other comprehensive income (loss) (150) 0
Others (book value) 0 0
Ending balance 1,851 [1] 1,700 [2]
Share in net assets 1,794 1,664
Total assets 15,307 11,660
Total liabilities 13,114 9,626
Net assets 2,193 2,034
Investment differential 57 0
Intercompany transaction 0 0
Others (consolidated FS) 0 36
Sales of JointVentures 1,415 331
Profit (loss) for the period of JointVentures ₩ 609 ₩ 151
Chester Solar V SpA    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation [1] Power generation [2]
Location CHILE [1] CHILE [2]
Percentage of ownership [3] 81.82% [1] 81.82% [2]
Acquisition cost ₩ 525 [1] ₩ 525 [2]
Book value [Abstract]    
Beginning balance 525 [2] 0
Acquisition 0 525
Disposal 0 0
Dividends received 0 0
Share of income (loss) (21) 0
Other comprehensive income (loss) (30) 0
Others (book value) 0 0
Ending balance 474 [1] 525 [2]
Share in net assets 356 419
Total assets 4,759 2,081
Total liabilities 4,324 1,569
Net assets 435 512
Investment differential 118 0
Intercompany transaction 0 0
Others (consolidated FS) 0 106
Sales of JointVentures 298 0
Profit (loss) for the period of JointVentures ₩ (19) ₩ (49)
Diego de Almagro Solar SpA    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation [1] Power generation [2]
Location CHILE [1] CHILE [2]
Percentage of ownership [3] 81.82% [1] 81.82% [2]
Acquisition cost ₩ 2,091 [1] ₩ 2,091 [2]
Book value [Abstract]    
Beginning balance 2,091 [2] 0
Acquisition 0 2,091
Disposal 0 0
Dividends received 0 0
Share of income (loss) (299) 0
Other comprehensive income (loss) (129) 0
Others (book value) 0 0
Ending balance 1,663 [1] 2,091 [2]
Share in net assets 1,569 1,993
Total assets 21,317 8,266
Total liabilities 19,399 5,830
Net assets 1,918 2,436
Investment differential 94 0
Intercompany transaction 0 0
Others (consolidated FS) 0 98
Sales of JointVentures 78 0
Profit (loss) for the period of JointVentures ₩ (340) ₩ (103)
South Jamaica Power Company Limited    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation Power generation
Location JAMAICA JAMAICA
Percentage of ownership [3] 20.00% 20.00%
Acquisition cost ₩ 16,231 ₩ 7,090
Book value [Abstract]    
Beginning balance 6,704 0
Acquisition 9,141 7,090
Disposal 0 0
Dividends received 0 0
Share of income (loss) (184) 0
Other comprehensive income (loss) 463 0
Others (book value) 0 (386)
Ending balance 16,124 6,704
Share in net assets 16,124 6,704
Total assets 294,341 153,958
Total liabilities 213,723 120,436
Net assets 80,618 33,522
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of JointVentures 0 0
Profit (loss) for the period of JointVentures ₩ (932) ₩ (755)
Daesan Green Energy Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation  
Location KOREA  
Percentage of ownership [3] 35.00%  
Acquisition cost ₩ 17,850  
Book value [Abstract]    
Acquisition 17,850  
Disposal 0  
Dividends received 0  
Share of income (loss) (417)  
Other comprehensive income (loss) 0  
Others (book value) 0  
Ending balance 17,433  
Share in net assets 17,433  
Total assets 52,582  
Total liabilities 2,774  
Net assets 49,808  
Investment differential 0  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of JointVentures 0  
Profit (loss) for the period of JointVentures ₩ (1,192)  
RE Holiday Holdings LLC    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation  
Location USA  
Percentage of ownership [3] 50.00%  
Acquisition cost ₩ 42,948  
Book value [Abstract]    
Acquisition 42,948  
Disposal 0  
Dividends received (112)  
Share of income (loss) 8,055  
Other comprehensive income (loss) 203  
Others (book value) 0  
Ending balance 51,094  
Share in net assets 51,094  
Total assets 334,742  
Total liabilities 232,553  
Net assets 102,189  
Investment differential 0  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of JointVentures 9,451  
Profit (loss) for the period of JointVentures ₩ 1,319  
RE Pioneer Holdings LLC    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation  
Location USA  
Percentage of ownership [3] 50.00%  
Acquisition cost ₩ 27,891  
Book value [Abstract]    
Acquisition 27,891  
Disposal 0  
Dividends received (979)  
Share of income (loss) 11,585  
Other comprehensive income (loss) 401  
Others (book value) 0  
Ending balance 38,898  
Share in net assets 38,898  
Total assets 252,512  
Total liabilities 174,717  
Net assets 77,795  
Investment differential 0  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of JointVentures 12,364  
Profit (loss) for the period of JointVentures ₩ 6,544  
RE Barren Ridge 1 Holdings LLC    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation  
Location USA  
Percentage of ownership [3] 50.00%  
Acquisition cost ₩ 28,021  
Book value [Abstract]    
Acquisition 28,021  
Disposal 0  
Dividends received (1,114)  
Share of income (loss) 13,994  
Other comprehensive income (loss) 514  
Others (book value) 0  
Ending balance 41,415  
Share in net assets 41,415  
Total assets 221,304  
Total liabilities 138,473  
Net assets 82,831  
Investment differential 0  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of JointVentures 10,567  
Profit (loss) for the period of JointVentures ₩ 8,625  
RE Astoria 2 LandCo LLC    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation  
Location USA  
Percentage of ownership [3] 50.00%  
Acquisition cost ₩ 5,188  
Book value [Abstract]    
Acquisition 5,188  
Disposal 0  
Dividends received (504)  
Share of income (loss) 866  
Other comprehensive income (loss) (140)  
Others (book value) 0  
Ending balance 5,410  
Share in net assets 5,410  
Total assets 11,030  
Total liabilities 210  
Net assets 10,820  
Investment differential 0  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of JointVentures 619  
Profit (loss) for the period of JointVentures ₩ 583  
RE Barren Ridge LandCo LLC    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation  
Location USA  
Percentage of ownership [3] 50.00%  
Acquisition cost ₩ 2,187  
Book value [Abstract]    
Acquisition 2,187  
Disposal 0  
Dividends received (202)  
Share of income (loss) (25)  
Other comprehensive income (loss) (62)  
Others (book value) 0  
Ending balance 1,898  
Share in net assets 1,898  
Total assets 3,881  
Total liabilities 84  
Net assets 3,797  
Investment differential 0  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of JointVentures 248  
Profit (loss) for the period of JointVentures ₩ 230  
Laurel SpA    
Disclosure of joint ventures [Line Items]    
Key operation activities [1] Power generation  
Location [1] CHILE  
Percentage of ownership [1],[3] 81.82%  
Acquisition cost [1] ₩ 1,222  
Book value [Abstract]    
Acquisition 1,222  
Disposal 0  
Dividends received 0  
Share of income (loss) (309)  
Other comprehensive income (loss) 8  
Others (book value) 0  
Ending balance [1] 921  
Share in net assets 739  
Total assets 5,475  
Total liabilities 4,572  
Net assets 903  
Investment differential 182  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of JointVentures 0  
Profit (loss) for the period of JointVentures ₩ (369)  
KIAMCO KOWEPO Bannerton Hold Co Pty Ltd    
Disclosure of joint ventures [Line Items]    
Key operation activities [7] Power generation  
Location [7] AUSTRALIA  
Percentage of ownership [3],[7] 12.37%  
Acquisition cost [7] ₩ 4,095  
Book value [Abstract]    
Acquisition 4,095  
Disposal 0  
Dividends received 0  
Share of income (loss) (23)  
Other comprehensive income (loss) (132)  
Others (book value) 0  
Ending balance [7] 3,940  
Share in net assets 3,931  
Total assets 31,958  
Total liabilities 173  
Net assets 31,785  
Investment differential 9  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of JointVentures 0  
Profit (loss) for the period of JointVentures ₩ (222)  
Chile Solar JV SpA    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation  
Location CHILE  
Percentage of ownership [3] 50.00%  
Acquisition cost ₩ 36,654  
Book value [Abstract]    
Acquisition 36,654  
Disposal 0  
Dividends received 0  
Share of income (loss) 4,453  
Other comprehensive income (loss) (5,278)  
Others (book value) 1,036  
Ending balance 36,865  
Share in net assets 36,865  
Total assets 73,740  
Total liabilities 10  
Net assets 73,730  
Investment differential 0  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of JointVentures 73  
Profit (loss) for the period of JointVentures ₩ 8,906  
Taebaek Gadeoksan Wind Power Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation  
Location KOREA  
Percentage of ownership [3] 46.58%  
Acquisition cost ₩ 8,500  
Book value [Abstract]    
Acquisition 8,500  
Disposal 0  
Dividends received 0  
Share of income (loss) 8  
Other comprehensive income (loss) 0  
Others (book value) 0  
Ending balance 8,508  
Share in net assets 8,508  
Total assets 18,766  
Total liabilities 499  
Net assets 18,267  
Investment differential 0  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of JointVentures 0  
Profit (loss) for the period of JointVentures ₩ 18  
Cheong-Song Noraesan Wind Power Co., Ltd.    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation  
Location KOREA  
Percentage of ownership [3] 24.76%  
Acquisition cost ₩ 2,073  
Book value [Abstract]    
Acquisition 2,073  
Disposal 0  
Dividends received 0  
Share of income (loss) 0  
Other comprehensive income (loss) 0  
Others (book value) 0  
Ending balance 2,073  
Share in net assets 2,029  
Total assets 8,221  
Total liabilities 24  
Net assets 8,197  
Investment differential 44  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of JointVentures 0  
Profit (loss) for the period of JointVentures ₩ 0  
Chester Solar I SpA    
Disclosure of joint ventures [Line Items]    
Key operation activities [1] Power generation  
Location [1] CHILE  
Percentage of ownership [1],[3] 81.82%  
Acquisition cost [1] ₩ 1,181  
Book value [Abstract]    
Acquisition 1,181  
Disposal 0  
Dividends received 0  
Share of income (loss) 0  
Other comprehensive income (loss) 0  
Others (book value) 0  
Ending balance [1] 1,181  
Share in net assets 940  
Total assets 1,712  
Total liabilities 562  
Net assets 1,150  
Investment differential 241  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of JointVentures 0  
Profit (loss) for the period of JointVentures ₩ (81)  
Solar Philippines Calatagan Corporation    
Disclosure of joint ventures [Line Items]    
Key operation activities Power generation  
Location PHILIPPINES  
Percentage of ownership [3] 38.00%  
Acquisition cost ₩ 47,903  
Book value [Abstract]    
Acquisition 47,903  
Disposal 0  
Dividends received 0  
Share of income (loss) 0  
Other comprehensive income (loss) 0  
Others (book value) 0  
Ending balance 47,903  
Share in net assets 26,764  
Total assets 121,650  
Total liabilities 51,219  
Net assets 70,431  
Investment differential 21,139  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of JointVentures 16,689  
Profit (loss) for the period of JointVentures ₩ 8,732  
[1] The effective percentage of ownership is more than 50%. However, according to the shareholders' agreement, all critical financial and operating decisions must be agreed to by all ownership parties. For this reason, the entities are classified as joint ventures.
[2] The effective percentage of ownership is more than 100%. However, according to the shareholders' agreement, all critical financial and operating decisions must be agreed to by all ownership parties. For these reasons, the entities are classified as joint ventures.
[3] The percentage of ownership shown above is after considering the treasury stocks and others.
[4] Datang Chaoyang Renewable Power Co., Ltd. was merged with Datang KEPCO Chaoyang Renewable Power Co., Ltd. during the year ended December 31, 2018.
[5] The Company reclassified its shares of KODE NOVUS I LLC to financial assets at FVOCI during the year ended December 31, 2018 due to non-participation of capital increase that resulted in loss of significant influence.
[6] The Company sold all of its shares of KODE NOVUS II LLC during the year ended December 31, 2018.
[7] The effective percentage of ownership is less than 20%. However, the Company can exercise significant influence by virtue of its contractual right to appoint a director to the board of directors of the entity.
[8] The effective percentage of ownership is less than 20% but the Company has joint control over the entity as decisions on the major activities require the unanimous consent of the parties that collectively control the entity