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Investments in Associates (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of associates [Line Items]    
Acquisition cost ₩ 2,539,956 ₩ 2,338,421
Book value    
Beginning balance 4,064,820 3,837,421
Acquisition 17,659 82,283
Disposal   0
Dividends received (136,012) (73,049)
Share of income (loss) 37,418 216,009
Other comprehensive income (loss) 39,199 14,148
Others (book value) 228,718 (11,992)
Ending balance ₩ 4,251,802 ₩ 4,064,820
Korea Gas Corporation    
Disclosure of associates [Line Items]    
Key operation activities [1] Importing and wholesaling LNG Importing and wholesaling LNG
Location [1] KOREA KOREA
Percentage of ownership [1] 20.47% 20.47%
Effective percentage of ownership [2] 21.57% 21.57%
Acquisition cost [1] ₩ 94,500 ₩ 94,500
Book value    
Beginning balance 1,701,848 1,618,868
Acquisition 0 0
Disposal 0 0
Dividends received (25,704) 0
Share of income (loss) 8,511 107,952
Other comprehensive income (loss) 12,687 (24,843)
Others (book value) (3,375) (129)
Ending balance 1,693,967 1,701,848
The fair value of associates [3] 715,365 910,980
Share in net assets 1,757,205 1,834,141
Total assets 39,311,855 [4] 39,689,692 [5]
Total liabilities 31,165,334 [4] 31,186,488 [5]
Net assets 8,146,521 8,503,204
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) (63,238) (132,293)
Sales of Associates 24,982,640 [4] 26,185,038 [5]
Profit (loss) for the period of Associates ₩ 38,764 [4] ₩ 523,480 [5]
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%
Effective percentage of ownership [2] 29.00% 29.00%
Acquisition cost ₩ 4,727 ₩ 4,727
Book value    
Beginning balance 21,838 21,838
Acquisition 0 0
Disposal 0 0
Dividends received (1,598) (1,872)
Share of income (loss) 5,002 2,584
Other comprehensive income (loss) 0 (102)
Others (book value) 151 (610)
Ending balance 25,393 21,838
The fair value of associates 33,089 33,609
Share in net assets 25,393 21,838
Total assets 186,434 144,425
Total liabilities 98,872 69,123
Net assets 87,562 75,302
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 306,026 325,694
Profit (loss) for the period of Associates ₩ 17,467 ₩ 9,987
YTN Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities Broadcasting Broadcasting
Location KOREA KOREA
Percentage of ownership 21.43% 21.43%
Effective percentage of ownership [2] 21.43% 21.43%
Acquisition cost ₩ 59,000 ₩ 59,000
Book value    
Beginning balance 40,338 40,606
Acquisition 0 0
Disposal 0 0
Dividends received (180) (180)
Share of income (loss) (449) 545
Other comprehensive income (loss) 5 (186)
Others (book value) 33 (447)
Ending balance 39,747 40,338
The fair value of associates 18,450 18,900
Share in net assets 39,747 40,346
Total assets 281,699 286,964
Total liabilities 96,211 98,682
Net assets 185,488 188,282
Investment differential 0 0
Intercompany transaction 0 (6)
Others (consolidated FS) 0 (2)
Sales of Associates 127,782 132,382
Profit (loss) for the period of Associates ₩ (1,230) ₩ 1,587
Cheongna Energy Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities Generating and distributing vapor and hot/cold water Generating and distributing vapor and hot/cold water
Location KOREA KOREA
Percentage of ownership 43.90% 43.90%
Effective percentage of ownership [2] 43.90% 43.90%
Acquisition cost ₩ 48,353 ₩ 48,353
Book value    
Beginning balance 3,465 8,337
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (2,054) (4,872)
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 1,411 3,465
Share in net assets (112) 1,015
Total assets 383,034 431,234
Total liabilities 383,288 428,921
Net assets (254) 2,313
Investment differential 2,584 2,584
Intercompany transaction (1,061) (134)
Others (consolidated FS) 0 0
Sales of Associates 68,626 64,594
Profit (loss) for the period of Associates ₩ (2,567) ₩ (11,110)
Gangwon Wind Power Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities [6] Power generation Power generation
Location [6] KOREA KOREA
Percentage of ownership [6] 15.00% 15.00%
Effective percentage of ownership [2] 15.00% 15.00%
Acquisition cost [6] ₩ 5,725 ₩ 5,725
Book value    
Beginning balance 13,220 13,855
Acquisition 0 0
Disposal 0 0
Dividends received (2,272) (2,272)
Share of income (loss) 1,379 1,637
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 12,327 13,220
Share in net assets 12,278 13,171
Total assets 83,528 89,614
Total liabilities 1,674 1,805
Net assets 81,854 87,809
Investment differential 49 0
Intercompany transaction 0 0
Others (consolidated FS) 0 49
Sales of Associates 24,116 25,407
Profit (loss) for the period of Associates ₩ 9,380 ₩ 10,926
Hyundai Green Power Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities Power generation Power generation
Location KOREA KOREA
Percentage of ownership 29.00% 29.00%
Effective percentage of ownership [2] 29.00% 29.00%
Acquisition cost ₩ 88,885 ₩ 88,885
Book value    
Beginning balance 127,160 114,806
Acquisition 0 0
Disposal 0 0
Dividends received (8,889) (8,889)
Share of income (loss) 5,982 21,243
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 124,253 127,160
Share in net assets 124,253 127,160
Total assets 1,086,738 1,127,220
Total liabilities 658,279 688,738
Net assets 428,459 438,482
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 507,653 501,798
Profit (loss) for the period of Associates ₩ 26,222 ₩ 66,925
Shareholders' agreements that may cause future economic resource or cash outflows As of December 31, 2019, Hyundai Green Power Co., Ltd., an associate of the Group, which engages in the byproduct gas power generating business, entered into a project financing agreement with a limit of W919.2 billion with Korea Development Bank and others. At a certain period in the future, the Group has call option against the financial investors (Korea Development Bank and others) and also has an obligation to purchase its shares when claimed by the financial investors. At a certain period in the future, the Group has put option against Hyundai Steel Company and a third party designated by Hyundai Steel Company (collectively, "Hyundai Steel Group"), the operating investor of Hyundai Green Power Co., Ltd., according to the conditions of the agreement and also has an obligation to sell its shares upon request from Hyundai Steel Company. As of December 31, 2018, Hyundai Green Power Co., Ltd., an associate of the Company, which engages in the byproduct gas power generating business, entered into a project financing agreement with a limit of W852.1 billion with Korea Development Bank and others. At a certain period in the future, the Company has call option against the financial investors (Korea Development Bank and others) and also has an obligation to purchase its shares when claimed by the financial investors. At a certain period in the future, the Company has put option against Hyundai Steel Company and a third party designated by Hyundai Steel Company (collectively, "Hyundai Steel Company"), the operating investor of Hyundai Green Power Co., Ltd., according to the conditions of the agreement and also has an obligation to sell its shares upon request from Hyundai Steel Company.
Korea Power Exchange    
Disclosure of associates [Line Items]    
Key operation activities [7] Management of power market and others Management of power market and others
Location [7] KOREA KOREA
Percentage of ownership [7] 100.00% 100.00%
Effective percentage of ownership [2] 100.00% 100.00%
Acquisition cost [7] ₩ 127,839 ₩ 127,839
Book value    
Beginning balance 251,802 237,631
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 10,907 16,031
Other comprehensive income (loss) 0 0
Others (book value) (3,810) (1,860)
Ending balance 258,899 251,802
Share in net assets 260,757 251,802
Total assets 315,683 304,318
Total liabilities 54,926 52,516
Net assets 260,757 251,802
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) (1,858) 0
Sales of Associates 107,034 108,571
Profit (loss) for the period of Associates ₩ 8,268 ₩ 16,031
AMEC Partners Korea Ltd.    
Disclosure of associates [Line Items]    
Key operation activities Resources development Resources development [8]
Location KOREA KOREA [8]
Percentage of ownership 19.00% 19.00% [8]
Effective percentage of ownership [2] 19.00% 19.00%
Acquisition cost ₩ 0 ₩ 707 [8]
Book value    
Beginning balance 209 215
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 0 (6)
Other comprehensive income (loss) 3 0
Others (book value) (212) 0
Ending balance 0 209
Share in net assets   209
Total assets   1,113
Total liabilities   14
Net assets   1,099
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 0 0
Profit (loss) for the period of Associates ₩ 0 ₩ (26)
Hyundai Energy    
Disclosure of associates [Line Items]    
Key operation activities [9] Power generation Power generation
Location [9] KOREA KOREA
Percentage of ownership [9] 30.66% 30.66%
Effective percentage of ownership [2] 46.30% 46.30%
Acquisition cost [9] ₩ 71,070 ₩ 71,070
Book value    
Beginning balance 0 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 0
Share in net assets (39,217) (26,285)
Total assets 465,238 470,818
Total liabilities 549,940 527,590
Net assets (84,702) (56,772)
Investment differential 0 0
Intercompany transaction (954) (996)
Others (consolidated FS) 40,171 27,281
Sales of Associates 91,842 101,998
Profit (loss) for the period of Associates ₩ (27,882) ₩ (33,947)
Shareholders' agreements that may cause future economic resource or cash outflows The Company had placed guarantees for a fixed return on the investment to NH Power II Co., Ltd. and National Agricultural Cooperative Federation ("NACF") and had obtained the rights to acquire the investment securities in return preferentially. In addition, NH Power II Co., Ltd. and NACF have a right, which can be exercised for 30 days starting from 2 months to 1 month prior to 17 years after the termination date of the contract to sell their shares to the Company. The Company had placed guarantees for a fixed return on the investment to NH Power II Co., Ltd. and National Agricultural Cooperative Federation ("NACF") and had obtained the rights to acquire the investment securities in return preferentially. In addition, NH Power II Co., Ltd. and NACF have a right, which can be exercised for 30 days starting from 2 months to 1 month prior to 17 years after the termination date of the contract to sell their shares to the Company.
Ecollite Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities Artificial light-weight aggregate Artificial light-weight aggregate
Location KOREA KOREA
Percentage of ownership 36.10% 36.10%
Effective percentage of ownership [2] 36.10% 36.10%
Acquisition cost ₩ 1,516 ₩ 1,516
Book value    
Beginning balance 0 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 0
Share in net assets 554 589
Total assets 1,838 1,944
Total liabilities 304 312
Net assets 1,534 1,632
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) (554) (589)
Sales of Associates 0 0
Profit (loss) for the period of Associates ₩ (97) ₩ (68)
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%
Effective percentage of ownership [2] 25.00% 25.00%
Acquisition cost ₩ 3,810 ₩ 3,810
Book value    
Beginning balance 5,665 5,319
Acquisition 0 0
Disposal 0 0
Dividends received 0 (196)
Share of income (loss) 1,374 542
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 7,039 5,665
Share in net assets 7,039 5,665
Total assets 36,182 36,986
Total liabilities 8,027 14,325
Net assets 28,155 22,661
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 6,177 8,233
Profit (loss) for the period of Associates ₩ 5,494 ₩ 2,170
Shareholders' agreements that may cause future economic resource or cash outflows In the case where non-controlling shareholders decide to dispose of their shares in Taebaek Wind Power Co., Ltd. after the warrant period of defect repair for wind power generator has expired, the Group acquires those shares at fair value. The acquisition is to be made after the conditions of the acquisition are discussed among the parties involved, with consideration of various factors such as financial status and business situation. In case non-controlling shareholders decide to dispose of their shares in Taebaek Wind Power Co., Ltd. after the warrant period of defect repair for wind power generator has expired, the Company acquires those shares at fair value. The acquisition is to be made after the conditions of the acquisition are discussed among the parties involved, with consideration of various factors such as financial status and business situation.
Significant restrictions on its abilities Financial institutions can reject or defer an approval with regard to the request for fund executions on subordinated loans of shareholders in order to pay senior loans based on the loan agreement. 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. Financial institutions can reject or defer an approval with regard to the request for fund executions on subordinated loans of shareholders in order to pay senior loans based on the loan agreement.
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%
Effective percentage of ownership [2] 25.00% 25.00%
Acquisition cost ₩ 3,420 ₩ 3,420
Book value    
Beginning balance 2,569 3,089
Acquisition 0 0
Disposal 0 0
Dividends received   0
Share of income (loss) (16) (520)
Other comprehensive income (loss)   0
Others (book value)   0
Ending balance 2,553 2,569
Share in net assets 2,553 2,569
Total assets 35,061 10,929
Total liabilities 24,847 653
Net assets 10,214 10,276
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 349 0
Profit (loss) for the period of Associates ₩ (61) ₩ (2,082)
Shareholders' agreements that may cause future economic resource or cash outflows At the commencement of the operation of the faciliity, the Group has a right to purchase all or part of the shares from the shareholders at fair value.  
Significant restrictions on its abilities Dividends can only be paid when all conditions of the shareholder's agreement are satisfied. Also, shares cannot be wholly or partially transferred without consent of the stakeholders is obtained.  
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%
Effective percentage of ownership [2] 25.00% 25.00%
Acquisition cost ₩ 3,875 ₩ 3,875
Book value    
Beginning balance 5,419 4,136
Acquisition 0 0
Disposal   0
Dividends received   0
Share of income (loss) 458 1,283
Other comprehensive income (loss)   0
Others (book value)   0
Ending balance 5,877 5,419
Share in net assets 5,877 5,419
Total assets 79,756 82,038
Total liabilities 56,248 60,362
Net assets 23,508 21,676
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 10,713 12,615
Profit (loss) for the period of Associates ₩ 2,010 ₩ 4,249
Shareholders' agreements that may cause future economic resource or cash outflows In the case where non-controlling shareholders decide to dispose of their shares in Pyeongchang Wind Power Co., Ltd. after commercial operation of the power plant has started, the Group acquires those shares at fair value. The acquisition is to be made after the conditions of the acquisition are discussed among the parties involved, with the careful consideration of various factors such as financial status and business situation. In case non-controlling shareholders decide to dispose of their shares in Pyeongchang Wind Power Co., Ltd. after commercial operation of the power plant has started, the Company acquires those shares at fair value. The acquisition is to be made after the conditions of the acquisition are discussed among the parties involved, with the careful consideration of various factors such as financial status and business situation.
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.
Daeryun Power Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities [8] Power generation Power generation
Location [8] KOREA KOREA
Percentage of ownership [8] 9.34% 9.34%
Effective percentage of ownership [2] 9.34% 9.34%
Acquisition cost [8] ₩ 40,854 ₩ 40,854
Book value    
Beginning balance 26,099 [10] 25,113
Acquisition 0 0 [10]
Disposal 0 0 [10]
Dividends received [10]   0
Share of income (loss) 173 (189) [10]
Other comprehensive income (loss) [10]   184
Others (book value) (25) 991 [10]
Ending balance 26,247 26,099 [10]
Share in net assets 27,066 26,919
Total assets 802,546 798,569
Total liabilities 512,757 510,358
Net assets 289,789 288,211
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) (819) (820)
Sales of Associates 163,129 62,252
Profit (loss) for the period of Associates ₩ 1,836 ₩ (4,958)
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 and Shares cannot be wholly or partially transferred without consent of the majority of lenders 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.
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%
Effective percentage of ownership [2] 30.00% 30.00%
Acquisition cost ₩ 3,801 ₩ 3,801
Book value    
Beginning balance 8,086 7,515
Acquisition 0 0
Disposal 0 0
Dividends received 0 (416)
Share of income (loss) 434 987
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 8,520 8,086
Share in net assets 8,520 8,086
Total assets 29,875 33,148
Total liabilities 1,476 6,194
Net assets 28,399 26,954
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 6,076 7,929
Profit (loss) for the period of Associates ₩ 1,447 ₩ 3,291
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.
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%
Effective percentage of ownership [2] 27.00% 27.00%
Acquisition cost ₩ 1,296 ₩ 1,296
Book value    
Beginning balance 2,337 2,218
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 45 119
Other comprehensive income (loss)   0
Others (book value)   0
Ending balance 2,382 2,337
Share in net assets 2,382 2,337
Total assets 20,465 22,598
Total liabilities 11,641 13,942
Net assets 8,824 8,656
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 3,377 3,586
Profit (loss) for the period of Associates ₩ 278 ₩ 439
Significant restrictions on its abilities Principal and interest, dividends to shareholders cannot be paid without written consent of financial institutions. Also, Shares cannot be wholly or partially transferred without consent of other shareholders is obtained. Principal and interest, dividends to shareholders cannot be paid without written consent of financial institutions.
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%
Effective percentage of ownership [2] 38.00% 38.00%
Acquisition cost ₩ 20,635 ₩ 20,635
Book value    
Beginning balance 57,558 52,283
Acquisition 0 0
Disposal 0 0
Dividends received (14,229) (9,549)
Share of income (loss) 5,929 4,235
Other comprehensive income (loss) 14,286 10,578
Others (book value) 39 11
Ending balance 63,583 57,558
The fair value of associates 117,230 72,710
Share in net assets 86,672 79,336
Total assets 250,544 225,599
Total liabilities 22,459 16,819
Net assets 228,085 208,780
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) (23,089) (21,778)
Sales of Associates 63,218 50,317
Profit (loss) for the period of Associates ₩ 39,876 ₩ 37,355
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%
Effective percentage of ownership [2] 34.00% 34.00%
Acquisition cost ₩ 413,153 ₩ 413,153
Book value    
Beginning balance 647,010 649,973
Acquisition 0 0
Disposal 0 0
Dividends received (11,468) (11,246)
Share of income (loss) 26,300 15,156
Other comprehensive income (loss) 9,209 (6,873)
Others (book value) (155) 0
Ending balance 670,896 647,010
Share in net assets 670,896 930,028
Total assets 6,758,957 7,155,937
Total liabilities 4,785,740 4,420,561
Net assets 1,973,217 2,735,376
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 (283,018)
Sales of Associates 2,024,730 1,921,367
Profit (loss) for the period of Associates ₩ 95,435 ₩ 120,558
Shareholders' agreements that may cause future economic resource or cash outflows Gemeng International Energy Co., Ltd. issued put options on 8% of its shares to its financial investors, KEPCO Woori Sprott PEF (NPS Co-Pa PEF). If the investment fund is not collected until the maturity date (December 25, 2023, two years extension is possible), PEF can exercise the option at strike price which is the same as a principal investment price (including operating fees ratio of below 1% per annum), and also, the Group provided a performance guarantee on this agreement. Gemeng International Energy Co., Ltd., issued put options on 8% of its shares to its financial investors, KEPCO Woori Sprott PEF (NPS Co-Pa PEF). If the investment fund is not collected until the maturity date (December 25, 2023, two years extension is possible), PEF can exercise the option at strike price which is the same as a principal investment price (including operating fees ratio of below 1% per annum), and also, the Company provided a performance guarantee on this agreement.
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%
Effective percentage of ownership [2] 27.50% 27.50%
Acquisition cost ₩ 40,365 ₩ 40,365
Book value    
Beginning balance 108,628 97,410
Acquisition 0 0
Disposal 0 0
Dividends received   (4,432)
Share of income (loss) 11,079 9,385
Other comprehensive income (loss) (65) 6,265
Others (book value) 3,783 0
Ending balance 123,425 108,628
Share in net assets 123,425 108,628
Total assets 852,457 876,069
Total liabilities 403,639 481,061
Net assets 448,818 395,008
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 277,370 274,962
Profit (loss) for the period of Associates ₩ 39,581 ₩ 33,144
KNOC Nigerian East Oil    
Disclosure of associates [Line Items]    
Key operation activities [11] Resources development Resources development
Location [11] NIGERIA NIGERIA
Percentage of ownership [11] 14.63% 14.63%
Effective percentage of ownership [2] 14.63% 14.63%
Acquisition cost [11] ₩ 12 ₩ 12
Book value    
Beginning balance 0 0
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (27) 2,615
Other comprehensive income (loss) (380) (471)
Others (book value) 407 (2,144)
Ending balance 0 0
Share in net assets (11,113) (10,706)
Total assets 58,402 78,841
Total liabilities 134,361 152,017
Net assets (75,959) (73,176)
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 11,113 10,706
Sales of Associates 0 0
Profit (loss) for the period of Associates ₩ (182) ₩ (398)
KNOC Nigerian West Oil    
Disclosure of associates [Line Items]    
Key operation activities [11] Resources development Resources development
Location [11] NIGERIA NIGERIA
Percentage of ownership [11] 14.63% 14.63%
Effective percentage of ownership [2] 14.63% 14.63%
Acquisition cost [11] ₩ 12 ₩ 12
Book value    
Beginning balance 0 0
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (29) 2,342
Other comprehensive income (loss) (349) (414)
Others (book value) 378 (1,928)
Ending balance 0 0
Share in net assets (10,213) (9,835)
Total assets 54,275 70,437
Total liabilities 124,086 137,663
Net assets (69,811) (67,226)
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 10,213 9,835
Sales of Associates 0 0
Profit (loss) for the period of Associates ₩ (180) ₩ (400)
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%
Effective percentage of ownership [2] 46.00% 46.00%
Acquisition cost ₩ 21,292 ₩ 21,292
Book value    
Beginning balance 31,097 29,403
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (2,867) 408
Other comprehensive income (loss) 2 1,286
Others (book value) 1,123 0
Ending balance 29,355 31,097
Share in net assets 29,355 31,097
Total assets 222,266 223,009
Total liabilities 158,451 155,406
Net assets 63,815 67,603
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 18,165 13,463
Profit (loss) for the period of Associates ₩ (2,315) ₩ 4,624
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%
Effective percentage of ownership [2] 20.00% 20.00%
Acquisition cost ₩ 615,860 ₩ 615,860
Book value    
Beginning balance 511,646 451,831
Acquisition 0 0
Disposal 0 0
Dividends received (71,100) 0
Share of income (loss) 6,181 (33,651)
Other comprehensive income (loss) (1,586) 74,776
Others (book value) 0 18,690
Ending balance 445,141 511,646
The fair value of associates 880,860 1,017,601
Share in net assets 136,012 164,262
Total assets 1,302,637 1,388,199
Total liabilities 622,576 566,890
Net assets 680,061 821,309
Investment differential 385,508 423,763
Intercompany transaction 0 0
Others (consolidated FS) (76,379) (76,379)
Sales of Associates 1,707,387 1,707,387
Profit (loss) for the period of Associates ₩ 252,855 ₩ 521,666
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%
Effective percentage of ownership [2] 49.00% 49.00%
Acquisition cost ₩ 132,300 ₩ 132,300
Book value    
Beginning balance 114,566 116,945
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 1,218 (2,326)
Other comprehensive income (loss) 0 0
Others (book value) 0 (53)
Ending balance 115,784 114,566
Share in net assets 117,403 116,293
Total assets 805,622 825,354
Total liabilities 566,025 588,022
Net assets 239,597 237,332
Investment differential 0 0
Intercompany transaction (1,619) (1,727)
Others (consolidated FS) 0 0
Sales of Associates 576,554 551,378
Profit (loss) for the period of Associates ₩ 2,319 ₩ (6,185)
Pioneer Gas Power Limited    
Disclosure of associates [Line Items]    
Key operation activities [12] Power generation Power generation
Location [12] INDIA INDIA
Percentage of ownership [12] 38.50% 38.50%
Effective percentage of ownership [2] 38.50% 38.50%
Acquisition cost [12] ₩ 49,831 ₩ 49,831
Book value    
Beginning balance 20,395 38,659
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (20,784) (17,684)
Other comprehensive income (loss) 389 (580)
Others (book value) 0 0
Ending balance 0 20,395
Share in net assets (22,459) (1,951)
Total assets 309,059 311,742
Total liabilities 367,399 316,810
Net assets (58,340) (5,068)
Investment differential 22,278 22,278
Intercompany transaction 0 0
Others (consolidated FS) 181 68
Sales of Associates 0 0
Profit (loss) for the period of Associates (54,501) ₩ (45,934)
Unrecognized equity interest 114  
Accumulated unrecognized equity interest ₩ 114  
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%
Effective percentage of ownership [2] 40.00% 40.00%
Acquisition cost ₩ 461 ₩ 461
Book value    
Beginning balance 0 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 0
Share in net assets (186) (179)
Total assets 592 572
Total liabilities 1,056 1,020
Net assets (464) (448)
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 186 179
Sales of Associates 0 0
Profit (loss) for the period of Associates 0 0
Unrecognized equity interest 6 7
Accumulated unrecognized equity interest ₩ 185 ₩ 179
Xe-Pian Xe-Namnoy Power    
Disclosure of associates [Line Items]    
Key operation activities Power generation Power generation
Location LAOS LAOS
Percentage of ownership 25.00% 25.00%
Effective percentage of ownership [2] 25.00% 25.00%
Acquisition cost ₩ 87,426 ₩ 84,374
Book value    
Beginning balance 77,165 61,779
Acquisition 3,052 12,893
Disposal 0 0
Dividends received 0 0
Share of income (loss) (10,210) (479)
Other comprehensive income (loss) 2,928 2,972
Others (book value) 0 0
Ending balance 72,935 77,165
Share in net assets 74,026 78,207
Total assets 1,194,125 1,015,013
Total liabilities 898,023 702,187
Net assets 296,102 312,826
Investment differential 305 253
Intercompany transaction (1,106) (1,006)
Others (consolidated FS) (290) (289)
Sales of Associates 6,731 0
Profit (loss) for the period of Associates ₩ (40,437) ₩ (1,214)
Hadong Mineral Fiber Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities [8] Recycling fly ashes Recycling fly ashes
Location [8] KOREA KOREA
Percentage of ownership [8] 8.33% 8.33%
Effective percentage of ownership [2] 8.33% 8.33%
Acquisition cost [8] ₩ 50 ₩ 50
Book value    
Beginning balance 0 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 0
Share in net assets (2) (2)
Total assets 203 203
Total liabilities 231 231
Net assets (28) (28)
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 2 2
Sales of Associates 0 0
Profit (loss) for the period of Associates 0 0
Unrecognized equity interest 0 0
Accumulated unrecognized equity interest ₩ 2 ₩ 2
Green Biomass Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities [13] Power generation Power generation
Location [13] KOREA KOREA
Percentage of ownership [13] 7.85% 8.80%
Effective percentage of ownership [2] 7.85% 8.80%
Acquisition cost [13] ₩ 714 ₩ 714
Book value    
Beginning balance 115 208
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (73) (93)
Other comprehensive income (loss) 0 0
Others (book value) 66 0
Ending balance 108 115
Share in net assets 108 115
Total assets 3,866 4,411
Total liabilities 2,487 3,107
Net assets 1,379 1,304
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 17 909
Profit (loss) for the period of Associates ₩ (925) ₩ (1,057)
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%
Effective percentage of ownership [2] 29.00% 29.00%
Acquisition cost ₩ 2,978 ₩ 2,978
Book value    
Beginning balance 365 0
Acquisition 0 0
Disposal   0
Dividends received   0
Share of income (loss) 1,031 349
Other comprehensive income (loss) 42 16
Others (book value) 0 0
Ending balance 1,438 365
Share in net assets 1,438 365
Total assets 26,109 24,022
Total liabilities 21,150 22,763
Net assets 4,959 1,259
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 11,196 14,393
Profit (loss) for the period of Associates 3,396 3,917
Unrecognized equity interest 0  
Unrecognized equity interest   (746)
Accumulated unrecognized equity interest ₩ 0 ₩ 0
Samcheok Eco Materials Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities [14] Recycling fly ashes Recycling fly ashes
Location [14] KOREA KOREA
Percentage of ownership [14] 2.35% 2.35%
Effective percentage of ownership [2] 25.54% 25.54%
Acquisition cost [14] ₩ 686 ₩ 686
Book value    
Beginning balance 0 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 0
Share in net assets 5,980 505
Total assets 26,625 24,391
Total liabilities 3,209 2,921
Net assets 23,416 21,470
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) (5,980) (505)
Sales of Associates 10,876 4,135
Profit (loss) for the period of Associates 1,946 (1,836)
Unrecognized equity interest   1,285
Unrecognized equity interest (497)  
Accumulated unrecognized equity interest ₩ 788 ₩ 1,285
Shareholders' agreements that may cause future economic resource or cash outflows   The Company has the rights to purchase the stocks should preferred stockholders elect to sell their stocks on the expected sell date (3 years from preferred stock payment date) and is required to guarantee the promised yield when preferred stockholders sell their stocks.
Significant restrictions on its abilities Dividends can only be paid when all conditions of the shareholder's agreement are satisfied. Also, shares cannot be wholly or partially transferred without consent of the stakeholders is obtained.  
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%
Effective percentage of ownership [2] 29.00% 29.00%
Acquisition cost ₩ 1,740 ₩ 1,740
Book value    
Beginning balance 8,015 2,067
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (1,395) 5,687
Other comprehensive income (loss) 0 0
Others (book value) (10) 261
Ending balance 6,610 8,015
Share in net assets 6,610 8,015
Total assets 137,370 147,886
Total liabilities 114,578 120,249
Net assets 22,792 27,637
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 36,435 58,686
Profit (loss) for the period of Associates ₩ (4,810) ₩ 19,453
Naepo Green Energy Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities Power generation Power generation
Location KOREA KOREA
Percentage of ownership 41.67% 41.67%
Effective percentage of ownership [2] 41.67% 41.67%
Acquisition cost ₩ 29,200 ₩ 29,200
Book value    
Beginning balance 0 [15] 20,598
Acquisition 0 0 [15]
Disposal 0 0 [15]
Dividends received 0 0 [15]
Share of income (loss) 0 (13,511) [15]
Other comprehensive income (loss) 0 0 [15]
Others (book value) 0 (7,087) [15]
Ending balance 0 0 [15]
Share in net assets (9,281) 7,085
Total assets 77,070 93,194
Total liabilities 99,345 76,190
Net assets (22,275) 17,004
Investment differential 2 0
Intercompany transaction 0 0
Others (consolidated FS) 9,279 (7,085)
Sales of Associates 6,572 6,459
Profit (loss) for the period of Associates (31,577) ₩ (6,623)
Unrecognized equity interest 9,281  
Accumulated unrecognized equity interest ₩ 9,281  
Significant restrictions on its abilities Shares cannot be wholly or partially transferred without consent of the stakeholders is obtained.  
Goseong Green Energy Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities [6] Power generation Power generation
Location [6] KOREA KOREA
Percentage of ownership [6] 1.12% 1.12%
Effective percentage of ownership [2] 1.12% 1.12%
Acquisition cost [6] ₩ 2,900 ₩ 2,900
Book value    
Beginning balance 2,459 2,597
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (119) (138)
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 2,340 2,459
Share in net assets 2,474 2,590
Total assets 3,399,058 1,891,662
Total liabilities 3,177,210 1,659,415
Net assets 221,848 232,247
Investment differential 0 0
Intercompany transaction (134) (131)
Others (consolidated FS) 0 0
Sales of Associates 0 0
Profit (loss) for the period of Associates ₩ (10,276) ₩ (7,323)
Gangneung Eco Power Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities [6] Power generation Power generation
Location [6] KOREA KOREA
Percentage of ownership [6] 1.61% 1.61%
Effective percentage of ownership [2] 1.61% 1.61%
Acquisition cost [6] ₩ 2,900 ₩ 2,900
Book value    
Beginning balance 2,495 2,583
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (65) (88)
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 2,430 2,495
Share in net assets 2,553 2,615
Total assets 1,362,692 813,938
Total liabilities 1,204,202 651,621
Net assets 158,490 162,317
Investment differential 0 0
Intercompany transaction (123) (120)
Others (consolidated FS) 0 0
Sales of Associates 0 0
Profit (loss) for the period of Associates ₩ (3,830) ₩ (4,194)
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%
Effective percentage of ownership [2] 40.00% 40.00%
Acquisition cost ₩ 72,000 ₩ 72,000
Book value    
Beginning balance 67,600 34,903
Acquisition   28,080
Disposal   0
Dividends received   0
Share of income (loss) (827) (2,946)
Other comprehensive income (loss) 198 6,673
Others (book value) (15) 890
Ending balance 66,956 67,600
Share in net assets 69,712 65,007
Total assets 981,387 674,100
Total liabilities 807,107 511,582
Net assets 174,280 162,518
Investment differential 12,800 12,800
Intercompany transaction (15,556) (10,207)
Others (consolidated FS) 0 0
Sales of Associates 119,162 0
Profit (loss) for the period of Associates ₩ 11,847 ₩ 682
Heang 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%
Effective percentage of ownership [2] 28.00% 28.00%
Acquisition cost ₩ 194 ₩ 194
Book value    
Beginning balance 202 187
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 13 15
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 215 202
Share in net assets 213 200
Total assets 2,483 2,630
Total liabilities 1,722 1,915
Net assets 761 715
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 2 2
Sales of Associates 454 455
Profit (loss) for the period of Associates ₩ 47 ₩ 52
Dongducheon Dream Power Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities Power generation [16] Power generation [17]
Location KOREA [16] KOREA [17]
Percentage of ownership 33.61% [16] 33.61% [17]
Effective percentage of ownership [2] 34.01% 34.01%
Acquisition cost ₩ 148,105 [16] ₩ 148,105 [17]
Book value    
Beginning balance 76,386 53,233
Acquisition 0 36,971
Disposal 0 0
Dividends received 0 0
Share of income (loss) 441 (13,824)
Other comprehensive income (loss) 0 0
Others (book value) (280) 6
Ending balance 76,547 76,386
Share in net assets 91,060 91,260
Total assets 1,474,224 1,512,510
Total liabilities 1,206,478 1,244,178
Net assets 267,746 268,332
Investment differential 1,757 1,757
Intercompany transaction (3,688) (4,049)
Others (consolidated FS) (12,582) (12,582)
Sales of Associates 689,414 828,430
Profit (loss) for the period of Associates ₩ 2,849 ₩ (22,864)
Jinbhuvish Power Generation Pvt. Ltd.    
Disclosure of associates [Line Items]    
Key operation activities [6] Power generation Power generation
Location [6] INDIA INDIA
Percentage of ownership [6] 5.16% 5.16%
Effective percentage of ownership [2] 5.16% 5.16%
Acquisition cost [6] ₩ 9,000 ₩ 9,000
Book value    
Beginning balance 0 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 0
Share in net assets 2,625 2,586
Total assets 64,111 63,163
Total liabilities 13,240 13,044
Net assets 50,871 50,119
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) (2,625) (2,586)
Sales of Associates 0 0
Profit (loss) for the period of Associates ₩ 0 ₩ 0
SE Green Energy Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities Power generation Power generation
Location KOREA KOREA
Percentage of ownership 47.76% 47.76%
Effective percentage of ownership [2] 47.76% 47.76%
Acquisition cost ₩ 0 ₩ 3,821
Book value    
Beginning balance 3,366 3,476
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 0 (110)
Other comprehensive income (loss) (75) 0
Others (book value) (3,291) 0
Ending balance 0 3,366
Share in net assets 0 3,366
Total assets   7,048
Total liabilities   0
Net assets 0 7,048
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) ₩ 0 0
Sales of Associates   0
Profit (loss) for the period of Associates   ₩ (230)
Daejung Offshore Wind Power Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities [18] Power generation  
Location [18] KOREA  
Percentage of ownership [18] 49.90%  
Effective percentage of ownership [2] 49.90%  
Acquisition cost [18] ₩ 5,190  
Book value    
Others (book value) 2,361  
Ending balance 2,361  
Share in net assets 2,361  
Total assets 6,181  
Total liabilities 1,450  
Net assets 4,731  
Investment differential 0  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of Associates 0  
Profit (loss) for the period of Associates ₩ (617)  
Significant restrictions on its abilities Before the commencement of the operation, shares cannot be wholly or partially transferred without consent of the stakeholders is obtained.  
GS Donghae Electric Power Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities [18] Power generation  
Location [18] KOREA  
Percentage of ownership [18] 34.00%  
Effective percentage of ownership [2] 34.00%  
Acquisition cost [18] ₩ 204,000  
Book value    
Others (book value) 255,983  
Ending balance 255,983  
Share in net assets 255,983  
Total assets 2,301,774  
Total liabilities 1,548,883  
Net assets 752,891  
Investment differential 0  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of Associates 688,055  
Profit (loss) for the period of Associates ₩ 75,842  
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%
Effective percentage of ownership [2] 29.00% 29.00%
Acquisition cost ₩ 1,230 ₩ 1,230
Book value    
Beginning balance 2,002 1,718
Acquisition 0 0
Disposal 0 0
Dividends received (327) (128)
Share of income (loss) 385 412
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 2,060 2,002
Share in net assets 2,060 2,002
Total assets 15,486 16,828
Total liabilities 8,385 9,923
Net assets 7,101 6,905
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 3,639 3,695
Profit (loss) for the period of Associates ₩ 1,442 ₩ 1,645
Jeongam Wind 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%
Effective percentage of ownership [2] 40.00% 40.00%
Acquisition cost ₩ 0 ₩ 5,580
Book value    
Beginning balance 4,589 3,763
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (152) 826
Other comprehensive income (loss) 0 0
Others (book value) (4,437) 0
Ending balance 0 4,589
Share in net assets   4,589
Total assets   93,444
Total liabilities   81,971
Net assets   11,473
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 0 1,559
Profit (loss) for the period of Associates ₩ 0 ₩ 2,154
Shareholders' agreements that may cause future economic resource or cash outflows In the case where non-controlling shareholders decide to dispose of their shares in Jeongam Wind Power Co., Ltd. after the construction of the power plant has been completed, the Group is obligated to acquire those shares at fair value. In case non-controlling shareholders decide to dispose of their shares in Jeongam Wind Power Co., Ltd. after the construction of the power plant has been completed, the Company is obligated to acquire those shares at fair value
Significant restrictions on its abilities Dividends can only be paid when all conditions of the loan agreement are satisfied and reimbursement to the lender can be restricted depending on the priority of the loans. Also, Shares cannot be wholly or partially transferred without consent of the stakeholders is obtained.  
Korea Power Engineering Service Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities Construction and service Construction and service
Location KOREA KOREA
Percentage of ownership 29.00% 29.00%
Effective percentage of ownership [2] 29.00% 29.00%
Acquisition cost ₩ 0 ₩ 290
Book value    
Beginning balance 4,333 3,659
Acquisition 0 0
Disposal 0 0
Dividends received 0 (218)
Share of income (loss) 508 929
Other comprehensive income (loss) 0 0
Others (book value) (4,841) (37)
Ending balance ₩ 0 4,333
Share in net assets   4,333
Total assets   18,609
Total liabilities   3,666
Net assets   14,943
Investment differential   0
Intercompany transaction   0
Others (consolidated FS)   0
Sales of Associates   20,809
Profit (loss) for the period of Associates   ₩ 3,207
Significant restrictions on its abilities Shares cannot be wholly or partially transferred without consent of the board of directors is obtained.  
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%
Effective percentage of ownership [2] 29.00% 29.00%
Acquisition cost ₩ 5,243 ₩ 5,243
Book value    
Beginning balance 12,537 7,363
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (1,884) 5,037
Other comprehensive income (loss) 0 0
Others (book value) (16) 137
Ending balance 10,637 12,537
Share in net assets 10,637 12,537
Total assets 173,537 195,227
Total liabilities 136,857 151,995
Net assets 36,680 43,232
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 52,256 77,011
Profit (loss) for the period of Associates ₩ (6,496) ₩ 17,370
Gunsan Bio Energy Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities [6] Power generation Power generation
Location [6] KOREA KOREA
Percentage of ownership [6] 18.87% 18.87%
Effective percentage of ownership [2] 18.87% 18.87%
Acquisition cost [6] ₩ 1,000 ₩ 1,000
Book value    
Beginning balance 0 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 0
Share in net assets (3,292) (2,202)
Total assets 10,614 8,990
Total liabilities 28,062 20,660
Net assets (17,448) (11,670)
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 3,292 2,202
Sales of Associates 0 0
Profit (loss) for the period of Associates (5,777) (4,420)
Unrecognized equity interest 1,090 916
Accumulated unrecognized equity interest ₩ 3,292 ₩ 2,202
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 28.00% 28.00%
Effective percentage of ownership [2] 28.00% 28.00%
Acquisition cost ₩ 2,800 ₩ 2,800
Book value    
Beginning balance 1,593 1,749
Acquisition 0 196
Disposal 0 0
Dividends received 0 0
Share of income (loss) (515) (352)
Other comprehensive income (loss) 0 0
Others (book value) (15) 0
Ending balance 1,063 1,593
Share in net assets 1,063 1,593
Total assets 12,810 15,019
Total liabilities 9,013 9,328
Net assets 3,797 5,691
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 8,428 8,615
Profit (loss) for the period of Associates ₩ (1,841) ₩ (1,056)
Ulleungdo Natural Energy Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities Renewable power generation Renewable power generation
Location KOREA KOREA
Percentage of ownership 29.85% 29.85%
Effective percentage of ownership [2] 29.85% 29.85%
Acquisition cost ₩ 0 ₩ 8,000
Book value    
Beginning balance 4,628 6,370
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (1) (1,749)
Other comprehensive income (loss) 0 0
Others (book value) (4,627) 7
Ending balance 0 4,628
Share in net assets 0 4,629
Total assets   17,134
Total liabilities   1,625
Net assets 0 15,509
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) ₩ 0 (1)
Sales of Associates   0
Profit (loss) for the period of Associates   ₩ (5,855)
Korea Nuclear Partners Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities Electric material agency Electric material agency
Location KOREA KOREA
Percentage of ownership 29.00% 29.00%
Effective percentage of ownership [2] 29.00% 29.00%
Acquisition cost ₩ 290 ₩ 290
Book value    
Beginning balance 175 383
Acquisition 0 [19] 0
Disposal 0 [19] 0
Dividends received 0 [19] 0
Share of income (loss) (79) [19] (208)
Other comprehensive income (loss) 0 [19] 0
Others (book value) (96) [19] 0
Ending balance 0 [19] 175
Share in net assets 160 175
Total assets 928 615
Total liabilities 375 12
Net assets 553 603
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) (160) 0
Sales of Associates 1,441 80
Profit (loss) for the period of Associates ₩ (50) ₩ (707)
Tamra Offshore Wind Power Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities Power generation Power generation
Location KOREA KOREA
Percentage of ownership 27.00% 27.00%
Effective percentage of ownership [2] 27.00% 27.00%
Acquisition cost ₩ 0 ₩ 8,910
Book value    
Beginning balance 10,401 8,560
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 0 1,841
Other comprehensive income (loss) 0 0
Others (book value) (10,401) 0
Ending balance 0 10,401
Share in net assets 0 10,401
Total assets   170,238
Total liabilities   131,717
Net assets 0 38,521
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) ₩ 0 0
Sales of Associates   21,701
Profit (loss) for the period of Associates   ₩ 4,077
Korea Electric Power Corporation Fund    
Disclosure of associates [Line Items]    
Key operation activities [20] Developing electric enterprises Developing electric enterprises
Location [20] KOREA KOREA
Percentage of ownership [20] 98.09% 98.09%
Effective percentage of ownership [2] 98.09% 98.09%
Acquisition cost [20] ₩ 51,500 ₩ 51,500
Book value    
Beginning balance 47,189 47,974
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (6,931) (505)
Other comprehensive income (loss) 868 (280)
Others (book value) 0 0
Ending balance 41,126 47,189
Share in net assets 41,122 47,185
Total assets 42,162 48,280
Total liabilities 239 176
Net assets 41,923 48,104
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 4 4
Sales of Associates 127 1,315
Profit (loss) for the period of Associates ₩ (5,430) ₩ (649)
Energy Infra Asset Management Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities [8] Asset management Asset management
Location [8] KOREA KOREA
Percentage of ownership [8] 9.90% 9.90%
Effective percentage of ownership [2] 9.90% 9.90%
Acquisition cost [8] ₩ 297 ₩ 297
Book value    
Beginning balance 665 476
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 126 189
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 791 665
Share in net assets 791 665
Total assets 8,712 7,225
Total liabilities 721 507
Net assets 7,991 6,718
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 5,118 5,757
Profit (loss) for the period of Associates ₩ 1,415 ₩ 2,193
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%
Effective percentage of ownership [2] 28.00% 28.00%
Acquisition cost ₩ 140 ₩ 140
Book value    
Beginning balance 17 11
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (4) 6
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 13 17
Share in net assets 13 17
Total assets 371 389
Total liabilities 323 328
Net assets 48 61
Investment differential 0 0
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 0 0
Profit (loss) for the period of Associates ₩ (14) ₩ (190)
YaksuESS 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%
Effective percentage of ownership [2] 29.00% 29.00%
Acquisition cost ₩ 210 ₩ 210
Book value    
Beginning balance 460 194
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 56 266
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 516 460
Share in net assets 514 458
Total assets 7,325 7,525
Total liabilities 5,551 5,944
Net assets 1,774 1,581
Investment differential 2 0
Intercompany transaction 0 0
Others (consolidated FS) 0 2
Sales of Associates 1,191 2,094
Profit (loss) for the period of Associates ₩ 363 ₩ 1,259
Nepal Water & Energy Development Company Private Limited    
Disclosure of associates [Line Items]    
Key operation activities [21] Construction and operation of utility plant Construction and operation of utility plant
Location [21] NEPAL NEPAL
Percentage of ownership [21] 57.76% 57.67%
Effective percentage of ownership [2] 58.59% 57.67%
Acquisition cost [21] ₩ 35,571 ₩ 33,577
Book value    
Beginning balance 30,961 30,498
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (854) (770)
Other comprehensive income (loss) 1,038 1,233
Others (book value) 0 0
Ending balance 31,145 30,961
Share in net assets 30,173 29,529
Total assets 78,309 55,453
Total liabilities 26,783 4,249
Net assets 51,526 51,204
Investment differential 972 972
Intercompany transaction 0 0
Others (consolidated FS) 0 460
Sales of Associates 0 0
Profit (loss) for the period of Associates ₩ (1,380) ₩ (984)
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%
Effective percentage of ownership [2] 20.00% 20.00%
Acquisition cost ₩ 2,000 ₩ 2,000
Book value    
Beginning balance 1,206 1,772
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) (258) (566)
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 948 1,206
Share in net assets 930 1,188
Total assets 28,816 29,234
Total liabilities 24,164 23,293
Net assets 4,652 5,941
Investment differential 18 18
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 0 0
Profit (loss) for the period of Associates ₩ (1,007) ₩ (2,831)
PND solar., Ltd    
Disclosure of associates [Line Items]    
Key operation activities Power generation Power generation
Location KOREA KOREA
Percentage of ownership 29.00% 29.00%
Effective percentage of ownership [2] 29.00% 29.00%
Acquisition cost ₩ 1,250 ₩ 1,250
Book value    
Beginning balance 1,020 1,250
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of income (loss) 124 (230)
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 1,144 1,020
Share in net assets 990 866
Total assets 40,941 42,283
Total liabilities 37,526 39,297
Net assets 3,415 2,986
Investment differential 154 154
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 6,908 1,094
Profit (loss) for the period of Associates ₩ 1,665 ₩ (795)
Hyundai Eco Energy Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities [6] Power generation Power generation
Location [6] KOREA KOREA
Percentage of ownership [6] 19.00% 19.00%
Effective percentage of ownership [2] 19.00% 19.00%
Acquisition cost [6] ₩ 3,610 ₩ 3,610
Book value    
Beginning balance 3,388 0
Acquisition 0 3,610
Disposal 0 0
Dividends received 0 0
Share of income (loss) 393 (222)
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 3,781 3,388
Share in net assets 3,567 3,174
Total assets 209,395 165,555
Total liabilities 190,622 148,852
Net assets 18,773 16,703
Investment differential 214 214
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 13,343 0
Profit (loss) for the period of Associates 1,306 (2,193)
Unrecognized equity interest 12,890 25,841
Accumulated unrecognized equity interest ₩ 38,731 ₩ 25,841
YeongGwang Yaksu Wind Electric. Co., Ltd    
Disclosure of associates [Line Items]    
Key operation activities [6] Power generation Power generation
Location [6] KOREA KOREA
Percentage of ownership [6] 9.63% 9.63%
Effective percentage of ownership [2] 9.63% 9.63%
Acquisition cost [6] ₩ 533 ₩ 533
Book value    
Beginning balance 533 0
Acquisition 0 533
Disposal 0 0
Dividends received 0 0
Share of income (loss) (147) 0
Other comprehensive income (loss) 0 0
Others (book value) 0 0
Ending balance 386 533
Share in net assets 86 233
Total assets 46,488 46,027
Total liabilities 45,594 43,606
Net assets 894 2,421
Investment differential 300 300
Intercompany transaction 0 0
Others (consolidated FS) 0 0
Sales of Associates 6,511 7,604
Profit (loss) for the period of Associates ₩ (1,510) ₩ (493)
Shareholders' agreements that may cause future economic resource or cash outflows As of December 31, 2019, YeongGwang Yaksu Wind Electric. Co., Ltd., an associate of the Group, which engages in the wind power generating business in YeongGwang, Jeonra-namdo, and entered into a project financing agreement with a limit of W46 billion with Hanhwa Life Insurance Co., Ltd. and others. The Group set the shares of YeongGwang Yaksu Wind Electric. Co., Ltd. as a collateral for the the project financing to the lenders. As of December 31, 2018, YeongGwang Yaksu Wind Electric. Co., Ltd, an associate of the Company, which engages in the wind power generating business, entered into a project financing agreement with a limit of W46.8 billion with Hanwha Life Insurance Co., Ltd. and others.
Green Energy Electricity Generation Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities Power generation  
Location KOREA  
Percentage of ownership 29.00%  
Effective percentage of ownership [2] 29.00%  
Acquisition cost ₩ 1,189  
Book value    
Acquisition 1,189  
Disposal 0  
Dividends received 0  
Share of income (loss) (1,026)  
Other comprehensive income (loss) 0  
Others (book value) 0  
Ending balance 163  
Share in net assets (616)  
Total assets 33,937  
Total liabilities 36,060  
Net assets (2,123)  
Investment differential 779  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of Associates 0  
Profit (loss) for the period of Associates ₩ (5,923)  
Korea Energy Solutions Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities R & D  
Location KOREA  
Percentage of ownership 20.00%  
Effective percentage of ownership [2] 20.00%  
Acquisition cost ₩ 300  
Book value    
Acquisition 300  
Disposal 0  
Dividends received 0  
Share of income (loss) (41)  
Other comprehensive income (loss) 0  
Others (book value) 0  
Ending balance 259  
Share in net assets 253  
Total assets 1,285  
Total liabilities 18  
Net assets 1,267  
Investment differential 6  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of Associates 134  
Profit (loss) for the period of Associates ₩ (233)  
ITR Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities R & D  
Location KOREA  
Percentage of ownership 20.00%  
Effective percentage of ownership [2] 20.00%  
Acquisition cost ₩ 50  
Book value    
Acquisition 50  
Disposal 0  
Dividends received 0  
Share of income (loss) (17)  
Other comprehensive income (loss) 0  
Others (book value) 0  
Ending balance 33  
Share in net assets 32  
Total assets 376  
Total liabilities 214  
Net assets 162  
Investment differential 1  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of Associates 167  
Profit (loss) for the period of Associates ₩ (88)  
Structure test network Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities Technical testing and consulting  
Location KOREA  
Percentage of ownership 20.00%  
Effective percentage of ownership [2] 20.00%  
Acquisition cost ₩ 25  
Book value    
Acquisition 25  
Disposal 0  
Dividends received 0  
Share of income (loss) (4)  
Other comprehensive income (loss) 0  
Others (book value) 0  
Ending balance 21  
Share in net assets (32)  
Total assets 89  
Total liabilities 249  
Net assets (160)  
Investment differential 53  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of Associates 76  
Profit (loss) for the period of Associates ₩ (72)  
Namjeongsusang Solar Power Operation Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities [22] Power generation  
Location [22] KOREA  
Percentage of ownership [22] 15.00%  
Effective percentage of ownership [2] 15.00%  
Acquisition cost [22] ₩ 969  
Book value    
Acquisition 969  
Disposal 0  
Dividends received 0  
Share of income (loss) (157)  
Other comprehensive income (loss) 0  
Others (book value) 0  
Ending balance 812  
Share in net assets 793  
Total assets 34,595  
Total liabilities 29,310  
Net assets 5,285  
Investment differential 19  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of Associates 0  
Profit (loss) for the period of Associates ₩ (1,149)  
Indeck Niles Development, LLC    
Disclosure of associates [Line Items]    
Key operation activities Power generation  
Location USA  
Percentage of ownership 50.00%  
Effective percentage of ownership [2] 50.00%  
Acquisition cost ₩ 0  
Book value    
Acquisition 0  
Disposal 0  
Dividends received 0  
Share of income (loss) 0  
Other comprehensive income (loss) 0  
Others (book value) 0  
Ending balance 0  
Share in net assets 24,646  
Total assets 49,465  
Total liabilities 174  
Net assets 49,291  
Investment differential 0  
Intercompany transaction 0  
Others (consolidated FS) (24,646)  
Sales of Associates 0  
Profit (loss) for the period of Associates ₩ (25,430)  
Significant restrictions on its abilities Shares cannot be wholly or partially transferred without consent of the stakeholders is obtained.  
Indeck Niles Asset Management, LLC    
Disclosure of associates [Line Items]    
Key operation activities [23] Power generation  
Location [23] USA  
Percentage of ownership [23] 33.33%  
Effective percentage of ownership [2] 33.33%  
Acquisition cost [23] ₩ 0  
Book value    
Acquisition 0  
Disposal 0  
Dividends received (245)  
Share of income (loss) 333  
Other comprehensive income (loss) (1)  
Others (book value) 0  
Ending balance 87  
Share in net assets 87  
Total assets 271  
Total liabilities 9  
Net assets 262  
Investment differential 0  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of Associates 1,513  
Profit (loss) for the period of Associates ₩ 753  
Significant restrictions on its abilities Shares cannot be wholly or partially transferred without consent of the stakeholders is obtained.  
Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1    
Disclosure of associates [Line Items]    
Key operation activities Holding company  
Location KOREA  
Percentage of ownership 49.00%  
Effective percentage of ownership [2] 49.00%  
Acquisition cost ₩ 7,105  
Book value    
Acquisition 7,105  
Disposal 0  
Dividends received 0  
Share of income (loss) 21  
Other comprehensive income (loss) 0  
Others (book value) 0  
Ending balance 7,126  
Share in net assets 7,126  
Total assets 14,559  
Total liabilities 15  
Net assets 14,544  
Investment differential 0  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of Associates 59  
Profit (loss) for the period of Associates ₩ 44  
Suwon New Power Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities Power generation  
Location KOREA  
Percentage of ownership 39.90%  
Effective percentage of ownership [2] 33.10%  
Acquisition cost ₩ 798  
Book value    
Acquisition 798  
Disposal 0  
Dividends received 0  
Share of income (loss) 0  
Other comprehensive income (loss) 0  
Others (book value) 0  
Ending balance 798  
Share in net assets 662  
Total assets 2,000  
Total liabilities 0  
Net assets 2,000  
Investment differential 0  
Intercompany transaction 0  
Others (consolidated FS) 136  
Sales of Associates 0  
Profit (loss) for the period of Associates ₩ 0  
KPGE Inc.    
Disclosure of associates [Line Items]    
Key operation activities Power generation materials business  
Location KOREA  
Percentage of ownership 29.00%  
Effective percentage of ownership [2] 29.00%  
Acquisition cost ₩ 287  
Book value    
Acquisition 287  
Disposal 0  
Dividends received 0  
Share of income (loss) 0  
Other comprehensive income (loss) 0  
Others (book value) 0  
Ending balance 287  
Share in net assets 285  
Total assets 984  
Total liabilities 0  
Net assets 984  
Investment differential 0  
Intercompany transaction 0  
Others (consolidated FS) 2  
Sales of Associates 0  
Profit (loss) for the period of Associates ₩ (6)  
Significant restrictions on its abilities Shares cannot be wholly or partially transferred without consent of the stakeholders is obtained.  
Gwangbaek Solar Power Investment Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities [24] Power generation  
Location [24] KOREA  
Percentage of ownership [24] 19.00%  
Effective percentage of ownership [2] 19.00%  
Acquisition cost [24] ₩ 2,054  
Book value    
Acquisition 2,054  
Disposal 0  
Dividends received 0  
Share of income (loss) 0  
Other comprehensive income (loss) 0  
Others (book value) 0  
Ending balance 2,054  
Share in net assets 1,976  
Total assets 193,464  
Total liabilities 183,063  
Net assets 10,401  
Investment differential 78  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of Associates 7,635  
Profit (loss) for the period of Associates ₩ (355)  
Goduk Clean Energy Co., Ltd.    
Disclosure of associates [Line Items]    
Key operation activities [25] Fuel cell generation  
Location [25] KOREA  
Percentage of ownership [25] 61.00%  
Effective percentage of ownership [2] 61.00%  
Acquisition cost [25] ₩ 1,830  
Book value    
Acquisition 1,830  
Disposal 0  
Dividends received 0  
Share of income (loss) 0  
Other comprehensive income (loss) 0  
Others (book value) 0  
Ending balance 1,830  
Share in net assets 1,830  
Total assets 3,000  
Total liabilities 0  
Net assets 3,000  
Investment differential 0  
Intercompany transaction 0  
Others (consolidated FS) 0  
Sales of Associates 0  
Profit (loss) for the period of Associates ₩ 0  
[1] The effective percentage of ownership is 21.57% considering treasury stocks.
[2] The percentage of ownership shown above is after considering the treasury stocks and others.
[3] An indicator of impairment has been identified for the Company's investment in Korea Gas Corporation ("KOGAS") for the years ended December 31, 2018 and 2019 as management determined that the carrying amount of the investment in KOGAS at KRW1,701,848 million and KRW1,693,967 million respectively were significantly higher than its fair value. Accordingly, management has assessed the recoverable amount of the investment by estimating the Company's share of the present value of the estimated future cash flows expected to be generated by KOGAS. The carrying amount of KOGAS as at December 31, 2018 and 2019 are supported by the recoverable amount determination and as such, no impairment has been recognized for the years ended December 31, 2018 and 2019. The recoverable amount estimate is most sensitive to assumptions regarding long-term revenue forecasts as well as the discount rate: - Revenue forecasts: price and volume of gas sold are based on the long-term natural gas supply and demand programs approved by the Ministry of Trade, Industry & Energy. - Discount rate: the discount rate is derived using the weighted average cost of capital methodology adjusted for any risks that are not reflected in the underlying cash flows. A real post-tax discount rate of 4.80% and 4.70% was applied to post-tax cash flows respectively as at December 31, 2018 and 2019. Changes in circumstances may affect the assumptions used to determine recoverable amount and could result in an impairment of KOGAS at future reporting dates.
[4] The profit recognized for the years ended December 31, 2018 and 2019 are reduced by the associate entity's net income attributable to non-controlling interests.
[5] The profit recognized for the years ended December 31, 2018 and 2019 are reduced by of the associate entity's net income attributable to non-controlling interests.
[6] 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.
[7] The effective percentage of ownership is 100%. However, the Government regulates the Company's ability to make operating and financial decisions over the entity, as the Government requires maintaining arms-length transactions between KPX and the Company's other subsidiaries. The Company can exercise significant influence by its right to nominate directors to the board of directors of the entity.
[8] 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.
[9] As of December 31, 2018, 15.64% of ownership of Hyundai Energy Co., Ltd. is held by NH Power ll Co., Ltd. and NH Bank. According to the shareholders' agreement reached on March 2011, not only does the Company have a call option to acquire the investment in Hyundai Energy Co., Ltd. from NH Power ll Co., Ltd. and NH Bank with a certain rate of return, NH Power ll Co., Ltd. and NH Bank also have put options to dispose of their investment to the Company. In connection with this agreement, the Company applied the equity method on the investment in Hyundai Energy Co., Ltd. with 46.30% of ownership.
[10] It was determined that there is objective evidence of impairment due to prolonged operating losses. As a result, the Company recognized an impairment loss of KRW820 million in impairment loss on investments in associates and joint ventures for the year ended December 31, 2018.
[11] The effective percentage of ownership is less than 20%. However, the Company can exercise significant influence by virtue of its contractual right to appoint one out of four members of the steering committee of the entity. Moreover, the Company has significant financial transactions, which can affect its influence on the entity.
[12] As of reporting date, the annual reporting period of all associates and joint ventures ends on December 31, except for Pioneer Gas Power Limited whose reporting period ends on March 31.
[13] The effective percentage of ownership is less than 20% but the Company can exercise significant influence by virtue of its contractual right to appoint a director to the board of directors of the entity and the fact that the dominant portion of the investee's sales transactions is generated from the Company.
[14] The Company's effective percentage of ownership excluding the redeemable convertible preferred stock is 25.54%.
[15] It was determined that there is objective evidence of impairment due to prolonged operating losses. As a result, the Company recognized an impairment loss of KRW7,087 million in impairment loss on investments in associates and joint ventures for the year ended December 31, 2018.
[16] The effective percentage of ownership is 34.01% considering the conversion of redeemable convertible preferred stock into ordinary stock.
[17] The effective percentage of ownership is 34.01% considering redeemable convertible preferred stock.
[18] Daejung Offshore Wind Power Co., Ltd. and GS Donghae Electric Power Co., Ltd. are reclassified from joint ventures to associates, and Jeongam Wind Power Co., Ltd. and Korea Power Engineering Service Co., Ltd. are reclassified from associates to joint ventures during the year ended December 31, 2019.
[19] It was determined that there is objective evidence of impairment due to prolonged operating losses. As a result, the Company recognized an impairment loss of KRW96 million in impairment loss on investments in associates and joint ventures for the year ended December 31, 2019.
[20] 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. For this reason, the entity is classified as an associate.
[21] The effective percentage of ownership is more than 50% but the Company does not hold control over the entity according to the shareholders' agreement. For this reason, the entity is classified as an associate.
[22] The effective percentage of ownership is less than 20%. However, the Company considers the major decision-making body to be the general decision of the board of directors, and the general decision of the board of directors can be passed only by two directors. For this reason, the entities are classified as an associate.
[23] Although the investment amount is not paid as of December 31, 2019, the Company has an investment agreement on 50% of the interests. the Company can exercise significant influence by virtue of its contractual right to appoint a director to the board of directors of the entity.
[24] 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.
[25] The effective percentage of ownership is 61%. However, it seems the Company doesn't have power on the Goduk Clean Energy Co., Ltd. due to its proportion to make decisions, which is less than 50%. The Company can exercise significant influence on the entity by participating in the board of directors and others. Therefore, the entity is classified as an associate.