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Guarantees provided between the related parties (Details)
ر.س in Thousands, $ in Thousands, ₩ in Millions
 12 Months Ended
Dec. 31, 2018
KRW (₩)
Dec. 31, 2018
USD ($)
Dec. 31, 2018
SAR (ر.س)
Performance guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Electric Power Corporation Korea Electric Power Corporation Korea Electric Power Corporation
Name of Guarantee Shuweihat Asia Operation & Maintenance Company Shuweihat Asia Operation & Maintenance Company Shuweihat Asia Operation & Maintenance Company
Name of Principal obligor SAPCO SAPCO SAPCO
Amount of guarantees | $   $ 11,000  
Performance guarantees and others      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Electric Power Corporation Korea Electric Power Corporation Korea Electric Power Corporation
Name of Guarantee Rabigh Operation & Maintenance Company Limited Rabigh Operation & Maintenance Company Limited Rabigh Operation & Maintenance Company Limited
Name of Principal obligor RABEC RABEC RABEC
Amount of guarantees | $   $ 1,387  
Debt guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Electric Power Corporation Korea Electric Power Corporation Korea Electric Power Corporation
Name of Guarantee Barakah One Company Barakah One Company Barakah One Company
Name of Principal obligor Export-Import Bank of Korea and others Export-Import Bank of Korea and others Export-Import Bank of Korea and others
Amount of guarantees | $   $ 900,000  
Performance guarantees and others      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Electric Power Corporation Korea Electric Power Corporation Korea Electric Power Corporation
Name of Guarantee Barakah One Company Barakah One Company Barakah One Company
Name of Principal obligor Export-Import Bank of Korea and others Export-Import Bank of Korea and others Export-Import Bank of Korea and others
Amount of guarantees | $   $ 3,404,275  
Performance guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Electric Power Corporation Korea Electric Power Corporation Korea Electric Power Corporation
Name of Guarantee RE Holiday Holdings LLC RE Holiday Holdings LLC RE Holiday Holdings LLC
Name of Principal obligor EPS Renewables Holdings, LLC, Santander Bank and others EPS Renewables Holdings, LLC, Santander Bank and others EPS Renewables Holdings, LLC, Santander Bank and others
Amount of guarantees | $   $ 223,000  
Performance guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Electric Power Corporation Korea Electric Power Corporation Korea Electric Power Corporation
Name of Guarantee RE Pioneer Holdings LLC RE Pioneer Holdings LLC RE Pioneer Holdings LLC
Name of Principal obligor EPS Renewables Holdings, LLC, Santander Bank and others EPS Renewables Holdings, LLC, Santander Bank and others EPS Renewables Holdings, LLC, Santander Bank and others
Amount of guarantees | $   $ 170,000  
Performance guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Electric Power Corporation Korea Electric Power Corporation Korea Electric Power Corporation
Name of Guarantee RE Barren Ridge 1 Holdings LLC RE Barren Ridge 1 Holdings LLC RE Barren Ridge 1 Holdings LLC
Name of Principal obligor Firstar Development, LLC, Santander Bank and others Firstar Development, LLC, Santander Bank and others Firstar Development, LLC, Santander Bank and others
Amount of guarantees | $   $ 149,000  
Performance guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Electric Power Corporation Korea Electric Power Corporation Korea Electric Power Corporation
Name of Guarantee Nghi Son 2 Power LLC Nghi Son 2 Power LLC Nghi Son 2 Power LLC
Name of Principal obligor SMBC Ho Chi Minh SMBC Ho Chi Minh SMBC Ho Chi Minh
Amount of guarantees | $   $ 28,000  
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Western Power Co., Ltd. Korea Western Power Co., Ltd. Korea Western Power Co., Ltd.
Name of Guarantee Cheongna Energy Co., Ltd. Cheongna Energy Co., Ltd. Cheongna Energy Co., Ltd.
Name of Principal obligor KEB Hana Bank and others KEB Hana Bank and others KEB Hana Bank and others
Amount of guarantees ₩ 3,465    
Guarantees for supplemental funding and others      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Western Power Co., Ltd. [1] Korea Western Power Co., Ltd. [1] Korea Western Power Co., Ltd. [1]
Name of Guarantee Cheongna Energy Co., Ltd. [1] Cheongna Energy Co., Ltd. [1] Cheongna Energy Co., Ltd. [1]
Name of Principal obligor KEB Hana Bank and others [1] KEB Hana Bank and others [1] KEB Hana Bank and others [1]
Amount of guarantees ₩ 0 [1]    
Payment guarantees for business reserve      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Western Power Co., Ltd. Korea Western Power Co., Ltd. Korea Western Power Co., Ltd.
Name of Guarantee Xe-Pian Xe-Namnoy Power Co., Ltd. Xe-Pian Xe-Namnoy Power Co., Ltd. Xe-Pian Xe-Namnoy Power Co., Ltd.
Name of Principal obligor Krung Thai Bank Krung Thai Bank Krung Thai Bank
Amount of guarantees | $   $ 2,500  
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Western Power Co., Ltd. Korea Western Power Co., Ltd. Korea Western Power Co., Ltd.
Name of Guarantee Xe-Pian Xe-Namnoy Power Co., Ltd. Xe-Pian Xe-Namnoy Power Co., Ltd. Xe-Pian Xe-Namnoy Power Co., Ltd.
Name of Principal obligor Krung Thai Bank Krung Thai Bank Krung Thai Bank
Amount of guarantees ₩ 77,165    
Impounding bonus guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Western Power Co., Ltd. Korea Western Power Co., Ltd. Korea Western Power Co., Ltd.
Name of Guarantee Xe-Pian Xe-Namnoy Power Co., Ltd. Xe-Pian Xe-Namnoy Power Co., Ltd. Xe-Pian Xe-Namnoy Power Co., Ltd.
Name of Principal obligor SK E&C SK E&C SK E&C
Amount of guarantees | $   $ 5,000  
Performance guarantees and others      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Western Power Co., Ltd. Korea Western Power Co., Ltd. Korea Western Power Co., Ltd.
Name of Guarantee Rabigh Operation & Maintenance Company Limited Rabigh Operation & Maintenance Company Limited Rabigh Operation & Maintenance Company Limited
Name of Principal obligor Saudi Arabia British Bank Saudi Arabia British Bank Saudi Arabia British Bank
Amount of guarantees | ر.س     ر.س 5,600
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Western Power Co., Ltd. Korea Western Power Co., Ltd. Korea Western Power Co., Ltd.
Name of Guarantee Daegu Photovoltaic Co., Ltd. Daegu Photovoltaic Co., Ltd. Daegu Photovoltaic Co., Ltd.
Name of Principal obligor Korea Development Bank Korea Development Bank Korea Development Bank
Amount of guarantees ₩ 2,002    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Western Power Co., Ltd. [2] Korea Western Power Co., Ltd. [2] Korea Western Power Co., Ltd. [2]
Name of Guarantee Dongducheon Dream Power Co., Ltd. [2] Dongducheon Dream Power Co., Ltd. [2] Dongducheon Dream Power Co., Ltd. [2]
Name of Principal obligor Kookmin Bank and others [2] Kookmin Bank and others [2] Kookmin Bank and others [2]
Amount of guarantees ₩ 41,389 [2]    
Debt guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Western Power Co., Ltd. Korea Western Power Co., Ltd. Korea Western Power Co., Ltd.
Name of Guarantee Dongducheon Dream Power Co., Ltd. Dongducheon Dream Power Co., Ltd. Dongducheon Dream Power Co., Ltd.
Name of Principal obligor BNK Securities and others BNK Securities and others BNK Securities and others
Amount of guarantees ₩ 20,300    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Western Power Co., Ltd. Korea Western Power Co., Ltd. Korea Western Power Co., Ltd.
Name of Guarantee PT. Mutiara Jawa PT. Mutiara Jawa PT. Mutiara Jawa
Name of Principal obligor Woori Bank Woori Bank Woori Bank
Amount of guarantees ₩ 365    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Western Power Co., Ltd. Korea Western Power Co., Ltd. Korea Western Power Co., Ltd.
Name of Guarantee Heang Bok Do Si Photovoltaic Power Co., Ltd. Heang Bok Do Si Photovoltaic Power Co., Ltd. Heang Bok Do Si Photovoltaic Power Co., Ltd.
Name of Principal obligor Nonghyup Bank Nonghyup Bank Nonghyup Bank
Amount of guarantees ₩ 202    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Western Power Co., Ltd. Korea Western Power Co., Ltd. Korea Western Power Co., Ltd.
Name of Guarantee Shin Pyeongtaek Power Co., Ltd. Shin Pyeongtaek Power Co., Ltd. Shin Pyeongtaek Power Co., Ltd.
Name of Principal obligor Kookmin Bank Kookmin Bank Kookmin Bank
Amount of guarantees ₩ 67,600    
Guarantees for supplemental funding      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Western Power Co., Ltd. [1] Korea Western Power Co., Ltd. [1] Korea Western Power Co., Ltd. [1]
Name of Guarantee Shin Pyeongtaek Power Co.,Ltd. [1] Shin Pyeongtaek Power Co.,Ltd. [1] Shin Pyeongtaek Power Co.,Ltd. [1]
Name of Principal obligor Kookmin Bank [1] Kookmin Bank [1] Kookmin Bank [1]
Amount of guarantees ₩ 0 [1]    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd.
Name of Guarantee Busan Shinho Solar Power Co., Ltd. Busan Shinho Solar Power Co., Ltd. Busan Shinho Solar Power Co., Ltd.
Name of Principal obligor Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others
Amount of guarantees ₩ 4,761    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd.
Name of Guarantee Seokmun Energy Co., Ltd. Seokmun Energy Co., Ltd. Seokmun Energy Co., Ltd.
Name of Principal obligor Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others
Amount of guarantees ₩ 16,751    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd.
Name of Guarantee Chun-cheon Energy Co., Ltd. Chun-cheon Energy Co., Ltd. Chun-cheon Energy Co., Ltd.
Name of Principal obligor Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others
Amount of guarantees ₩ 42,505    
Guarantees for supplemental funding      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea East-West Power Co., Ltd. [1] Korea East-West Power Co., Ltd. [1] Korea East-West Power Co., Ltd. [1]
Name of Guarantee Chun-cheon Energy Co., Ltd. [1] Chun-cheon Energy Co., Ltd. [1] Chun-cheon Energy Co., Ltd. [1]
Name of Principal obligor Kookmin Bank and others [1] Kookmin Bank and others [1] Kookmin Bank and others [1]
Amount of guarantees ₩ 20,000 [1]    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd.
Name of Guarantee Honam Wind Power Co., Ltd. Honam Wind Power Co., Ltd. Honam Wind Power Co., Ltd.
Name of Principal obligor Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others
Amount of guarantees ₩ 4,860    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd.
Name of Guarantee GS Donghae Electric Power Co., Ltd. GS Donghae Electric Power Co., Ltd. GS Donghae Electric Power Co., Ltd.
Name of Principal obligor Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others
Amount of guarantees ₩ 240,591    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd.
Name of Guarantee Yeonggwangbaeksu Wind Power Co., Ltd. Yeonggwangbaeksu Wind Power Co., Ltd. Yeonggwangbaeksu Wind Power Co., Ltd.
Name of Principal obligor Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others
Amount of guarantees ₩ 2,843    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd.
Name of Guarantee Yeonggwang Wind Power Co., Ltd. Yeonggwang Wind Power Co., Ltd. Yeonggwang Wind Power Co., Ltd.
Name of Principal obligor KDB Capital Corporation and others KDB Capital Corporation and others KDB Capital Corporation and others
Amount of guarantees ₩ 15,304    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd.
Name of Guarantee Daesan Green Energy Co., Ltd. Daesan Green Energy Co., Ltd. Daesan Green Energy Co., Ltd.
Name of Principal obligor IBK IBK IBK
Amount of guarantees ₩ 17,433    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd.
Name of Guarantee Taebaek Gadeoksan Wind Power Co., Ltd. Taebaek Gadeoksan Wind Power Co., Ltd. Taebaek Gadeoksan Wind Power Co., Ltd.
Name of Principal obligor Samsung Fire & Marine Insurance Co., Ltd. and others Samsung Fire & Marine Insurance Co., Ltd. and others Samsung Fire & Marine Insurance Co., Ltd. and others
Amount of guarantees ₩ 8,508    
Debt guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd.
Name of Guarantee PT. Tanjung Power Indonesia PT. Tanjung Power Indonesia PT. Tanjung Power Indonesia
Name of Principal obligor MUFG Bank, Ltd.(MUFG) (formerly, the Bank of Tokyo Mitsubishi UFJ, Ltd.(BTMU)) and others MUFG Bank, Ltd.(MUFG) (formerly, the Bank of Tokyo Mitsubishi UFJ, Ltd.(BTMU)) and others MUFG Bank, Ltd.(MUFG) (formerly, the Bank of Tokyo Mitsubishi UFJ, Ltd.(BTMU)) and others
Amount of guarantees | $   $ 46,983  
Other guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd.
Name of Guarantee PT. Tanjung Power Indonesia PT. Tanjung Power Indonesia PT. Tanjung Power Indonesia
Name of Principal obligor PT Adaro Indonesia PT Adaro Indonesia PT Adaro Indonesia
Amount of guarantees | $   $ 3,150  
Performance guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd. Korea East-West Power Co., Ltd.
Name of Guarantee South Jamaica Power Company Limited South Jamaica Power Company Limited South Jamaica Power Company Limited
Name of Principal obligor Societe Generale Societe Generale Societe Generale
Amount of guarantees | $   $ 14,400  
Guarantees for supplemental funding      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor EWP Barbados 1 SRL [1],[3] EWP Barbados 1 SRL [1],[3] EWP Barbados 1 SRL [1],[3]
Name of Guarantee South Jamaica Power Company Limited [1],[3] South Jamaica Power Company Limited [1],[3] South Jamaica Power Company Limited [1],[3]
Name of Principal obligor JCSD Trustee Services Limited and others [1],[3] JCSD Trustee Services Limited and others [1],[3] JCSD Trustee Services Limited and others [1],[3]
Amount of guarantees | $   $ 18,350 [1],[3]  
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd.
Name of Guarantee KNH Solar Co., Ltd. KNH Solar Co., Ltd. KNH Solar Co., Ltd.
Name of Principal obligor Shinhan Bank and Kyobo Life Insurance Co., Ltd. Shinhan Bank and Kyobo Life Insurance Co., Ltd. Shinhan Bank and Kyobo Life Insurance Co., Ltd.
Amount of guarantees ₩ 2,337    
Performance guarantees and guarantees for supplemental funding      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Southern Power Co., Ltd. [1] Korea Southern Power Co., Ltd. [1] Korea Southern Power Co., Ltd. [1]
Name of Guarantee KNH Solar Co., Ltd. [1] KNH Solar Co., Ltd. [1] KNH Solar Co., Ltd. [1]
Name of Principal obligor Shinhan Bank and Kyobo Life Insurance Co., Ltd. [1] Shinhan Bank and Kyobo Life Insurance Co., Ltd. [1] Shinhan Bank and Kyobo Life Insurance Co., Ltd. [1]
Amount of guarantees ₩ 0 [1]    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd.
Name of Guarantee Daeryun Power Co., Ltd. Daeryun Power Co., Ltd. Daeryun Power Co., Ltd.
Name of Principal obligor Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others
Amount of guarantees ₩ 26,099    
Guarantees for supplemental funding and others      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Southern Power Co., Ltd. [1] Korea Southern Power Co., Ltd. [1] Korea Southern Power Co., Ltd. [1]
Name of Guarantee Daeryun Power Co., Ltd. [1] Daeryun Power Co., Ltd. [1] Daeryun Power Co., Ltd. [1]
Name of Principal obligor Korea Development Bank and others [1] Korea Development Bank and others [1] Korea Development Bank and others [1]
Amount of guarantees ₩ 0 [1]    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd.
Name of Guarantee Changjuk Wind Power Co., Ltd. Changjuk Wind Power Co., Ltd. Changjuk Wind Power Co., Ltd.
Name of Principal obligor Shinhan Bank Shinhan Bank Shinhan Bank
Amount of guarantees ₩ 8,086    
Guarantees for supplemental funding      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Southern Power Co., Ltd. [1] Korea Southern Power Co., Ltd. [1] Korea Southern Power Co., Ltd. [1]
Name of Guarantee Changjuk Wind Power Co., Ltd. [1] Changjuk Wind Power Co., Ltd. [1] Changjuk Wind Power Co., Ltd. [1]
Name of Principal obligor Shinhan Bank [1] Shinhan Bank [1] Shinhan Bank [1]
Amount of guarantees ₩ 0 [1]    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd.
Name of Guarantee Daegu Green Power Co., Ltd. Daegu Green Power Co., Ltd. Daegu Green Power Co., Ltd.
Name of Principal obligor Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others
Amount of guarantees ₩ 41,110    
Performance guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd.
Name of Guarantee Kelar S.A Kelar S.A Kelar S.A
Name of Principal obligor KEB Hana Bank, SMBC, Mizuho Bank, MUFG, Natixis KEB Hana Bank, SMBC, Mizuho Bank, MUFG, Natixis KEB Hana Bank, SMBC, Mizuho Bank, MUFG, Natixis
Amount of guarantees | $   $ 63,707  
Debt guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd.
Name of Guarantee Daehan Wind Power PSC Daehan Wind Power PSC Daehan Wind Power PSC
Name of Principal obligor Shinhan Bank Shinhan Bank Shinhan Bank
Amount of guarantees | $   $ 18,200  
Performance guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd.
Name of Guarantee Daehan Wind Power PSC Daehan Wind Power PSC Daehan Wind Power PSC
Name of Principal obligor Shinhan Bank Shinhan Bank Shinhan Bank
Amount of guarantees | $   $ 3,000  
Guarantees for supplemental funding      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Southern Power Co., Ltd. [1] Korea Southern Power Co., Ltd. [1] Korea Southern Power Co., Ltd. [1]
Name of Guarantee Daehan Wind Power PSC [1] Daehan Wind Power PSC [1] Daehan Wind Power PSC [1]
Name of Principal obligor Shinhan Bank [1] Shinhan Bank [1] Shinhan Bank [1]
Amount of guarantees | $   $ 0 [1]  
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd.
Name of Guarantee Pyeongchang Wind Power Co., Ltd. Pyeongchang Wind Power Co., Ltd. Pyeongchang Wind Power Co., Ltd.
Name of Principal obligor Woori Bank and Shinhan Bank and others Woori Bank and Shinhan Bank and others Woori Bank and Shinhan Bank and others
Amount of guarantees ₩ 5,419    
Performance guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd.
Name of Guarantee Pyeongchang Wind Power Co., Ltd. Pyeongchang Wind Power Co., Ltd. Pyeongchang Wind Power Co., Ltd.
Name of Principal obligor Woori Bank and Shinhan Bank and others Woori Bank and Shinhan Bank and others Woori Bank and Shinhan Bank and others
Amount of guarantees ₩ 0    
Guarantees for supplemental funding      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Southern Power Co., Ltd. [1] Korea Southern Power Co., Ltd. [1] Korea Southern Power Co., Ltd. [1]
Name of Guarantee Taebaek Wind Power Co., Ltd. [1] Taebaek Wind Power Co., Ltd. [1] Taebaek Wind Power Co., Ltd. [1]
Name of Principal obligor Shinhan Bank and others [1] Shinhan Bank and others [1] Shinhan Bank and others [1]
Amount of guarantees ₩ 0 [1]    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd.
Name of Guarantee Jeongam Wind Power Co., Ltd. Jeongam Wind Power Co., Ltd. Jeongam Wind Power Co., Ltd.
Name of Principal obligor IBK, SK Securities Co., Ltd. and others IBK, SK Securities Co., Ltd. and others IBK, SK Securities Co., Ltd. and others
Amount of guarantees ₩ 4,589    
Performance guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd. Korea Southern Power Co., Ltd.
Name of Guarantee Jeongam Wind Power Co., Ltd. Jeongam Wind Power Co., Ltd. Jeongam Wind Power Co., Ltd.
Name of Principal obligor IBK, SK Securities Co., Ltd. and others IBK, SK Securities Co., Ltd. and others IBK, SK Securities Co., Ltd. and others
Amount of guarantees ₩ 0    
Payment guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Southern Power Co., Ltd. [4] Korea Southern Power Co., Ltd. [4] Korea Southern Power Co., Ltd. [4]
Name of Guarantee Samcheok Eco Materials Co., Ltd. [4] Samcheok Eco Materials Co., Ltd. [4] Samcheok Eco Materials Co., Ltd. [4]
Name of Principal obligor SEM Investment Co., Ltd. [4] SEM Investment Co., Ltd. [4] SEM Investment Co., Ltd. [4]
Amount of guarantees ₩ 0 [4]    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Midland Power Co., Ltd. Korea Midland Power Co., Ltd. Korea Midland Power Co., Ltd.
Name of Guarantee Hyundai Green Power Co., Ltd. Hyundai Green Power Co., Ltd. Hyundai Green Power Co., Ltd.
Name of Principal obligor Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others
Amount of guarantees ₩ 127,160    
Debt guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Midland Power Co., Ltd. Korea Midland Power Co., Ltd. Korea Midland Power Co., Ltd.
Name of Guarantee PT. Cirebon Electric Power PT. Cirebon Electric Power PT. Cirebon Electric Power
Name of Principal obligor Mizuho Bank Mizuho Bank Mizuho Bank
Amount of guarantees | $   $ 11,825  
Debt guarantees      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Midland Power Co., Ltd. Korea Midland Power Co., Ltd. Korea Midland Power Co., Ltd.
Name of Guarantee PT Wampu Electric Power PT Wampu Electric Power PT Wampu Electric Power
Name of Principal obligor SMBC SMBC SMBC
Amount of guarantees | $   $ 4,854  
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Midland Power Co., Ltd. Korea Midland Power Co., Ltd. Korea Midland Power Co., Ltd.
Name of Guarantee YaksuESS Co., Ltd YaksuESS Co., Ltd YaksuESS Co., Ltd
Name of Principal obligor Hanwha Life Insurance Co., Ltd. Hanwha Life Insurance Co., Ltd. Hanwha Life Insurance Co., Ltd.
Amount of guarantees ₩ 460    
Guarantees for supplemental funding      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Midland Power Co., Ltd. [1] Korea Midland Power Co., Ltd. [1] Korea Midland Power Co., Ltd. [1]
Name of Guarantee YaksuESS Co., Ltd [1] YaksuESS Co., Ltd [1] YaksuESS Co., Ltd [1]
Name of Principal obligor Hanwha Life Insurance Co., Ltd. [1] Hanwha Life Insurance Co., Ltd. [1] Hanwha Life Insurance Co., Ltd. [1]
Amount of guarantees ₩ 0 [1]    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Midland Power Co., Ltd. Korea Midland Power Co., Ltd. Korea Midland Power Co., Ltd.
Name of Guarantee YeongGwang Yaksu Wind Electric. Co., Ltd YeongGwang Yaksu Wind Electric. Co., Ltd YeongGwang Yaksu Wind Electric. Co., Ltd
Name of Principal obligor Hanwha Life Insurance Co., Ltd. and others Hanwha Life Insurance Co., Ltd. and others Hanwha Life Insurance Co., Ltd. and others
Amount of guarantees ₩ 533    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea South-East Power Co., Ltd. [5] Korea South-East Power Co., Ltd. [5] Korea South-East Power Co., Ltd. [5]
Name of Guarantee Hyundai Energy Co., Ltd. [5] Hyundai Energy Co., Ltd. [5] Hyundai Energy Co., Ltd. [5]
Name of Principal obligor Korea Development Bank and others [5] Korea Development Bank and others [5] Korea Development Bank and others [5]
Amount of guarantees ₩ 0 [5]    
Performance guarantees and guarantees for supplemental funding and others      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea South-East Power Co., Ltd. [1],[6] Korea South-East Power Co., Ltd. [1],[6] Korea South-East Power Co., Ltd. [1],[6]
Name of Guarantee Hyundai Energy Co., Ltd. [1],[6] Hyundai Energy Co., Ltd. [1],[6] Hyundai Energy Co., Ltd. [1],[6]
Name of Principal obligor Korea Development Bank and others [1],[6] Korea Development Bank and others [1],[6] Korea Development Bank and others [1],[6]
Amount of guarantees ₩ 78,600 [1],[6]    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea South-East Power Co., Ltd. Korea South-East Power Co., Ltd. Korea South-East Power Co., Ltd.
Name of Guarantee RES Technology AD RES Technology AD RES Technology AD
Name of Principal obligor UniCredit Bulbank and others UniCredit Bulbank and others UniCredit Bulbank and others
Amount of guarantees ₩ 15,209    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea South-East Power Co., Ltd. Korea South-East Power Co., Ltd. Korea South-East Power Co., Ltd.
Name of Guarantee ASM-BG Investicii AD ASM-BG Investicii AD ASM-BG Investicii AD
Name of Principal obligor UniCredit Bulbank and others UniCredit Bulbank and others UniCredit Bulbank and others
Amount of guarantees ₩ 21,379    
Guarantees for supplemental funding      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea South-East Power Co., Ltd. [1],[7] Korea South-East Power Co., Ltd. [1],[7] Korea South-East Power Co., Ltd. [1],[7]
Name of Guarantee Expressway Solar-light Power Generation Co., Ltd. [1],[7] Expressway Solar-light Power Generation Co., Ltd. [1],[7] Expressway Solar-light Power Generation Co., Ltd. [1],[7]
Name of Principal obligor Woori Bank [1],[7] Woori Bank [1],[7] Woori Bank [1],[7]
Amount of guarantees ₩ 2,500 [1],[7]    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea South-East Power Co., Ltd. Korea South-East Power Co., Ltd. Korea South-East Power Co., Ltd.
Name of Guarantee S-Power Co., Ltd. S-Power Co., Ltd. S-Power Co., Ltd.
Name of Principal obligor Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others
Amount of guarantees ₩ 114,566    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea South-East Power Co., Ltd. Korea South-East Power Co., Ltd. Korea South-East Power Co., Ltd.
Name of Guarantee Goseong Green Energy Co., Ltd. Goseong Green Energy Co., Ltd. Goseong Green Energy Co., Ltd.
Name of Principal obligor Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others
Amount of guarantees ₩ 2,459    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea South-East Power Co., Ltd. Korea South-East Power Co., Ltd. Korea South-East Power Co., Ltd.
Name of Guarantee Gangneung Eco Power Co., Ltd. Gangneung Eco Power Co., Ltd. Gangneung Eco Power Co., Ltd.
Name of Principal obligor Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others
Amount of guarantees ₩ 2,495    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea South-East Power Co., Ltd. Korea South-East Power Co., Ltd. Korea South-East Power Co., Ltd.
Name of Guarantee PND solar., Ltd. PND solar., Ltd. PND solar., Ltd.
Name of Principal obligor IBK and others IBK and others IBK and others
Amount of guarantees ₩ 1,020    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea South-East Power Co., Ltd. Korea South-East Power Co., Ltd. Korea South-East Power Co., Ltd.
Name of Guarantee Tamra Offshore Wind Power Co., Ltd. Tamra Offshore Wind Power Co., Ltd. Tamra Offshore Wind Power Co., Ltd.
Name of Principal obligor Nonghyup Life Insurance Co., Ltd. and others Nonghyup Life Insurance Co., Ltd. and others Nonghyup Life Insurance Co., Ltd. and others
Amount of guarantees ₩ 10,401    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea South-East Power Co., Ltd. Korea South-East Power Co., Ltd. Korea South-East Power Co., Ltd.
Name of Guarantee Hyundai Eco Energy Co., Ltd. Hyundai Eco Energy Co., Ltd. Hyundai Eco Energy Co., Ltd.
Name of Principal obligor Samsung Life Insurance and others Samsung Life Insurance and others Samsung Life Insurance and others
Amount of guarantees ₩ 3,388    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Hydro & Nuclear Power Co., Ltd. Korea Hydro & Nuclear Power Co., Ltd. Korea Hydro & Nuclear Power Co., Ltd.
Name of Guarantee Noeul Green Energy Co., Ltd. Noeul Green Energy Co., Ltd. Noeul Green Energy Co., Ltd.
Name of Principal obligor KEB Hana Bank and others KEB Hana Bank and others KEB Hana Bank and others
Amount of guarantees ₩ 8,016    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor Korea Hydro & Nuclear Power Co., Ltd. Korea Hydro & Nuclear Power Co., Ltd. Korea Hydro & Nuclear Power Co., Ltd.
Name of Guarantee Busan Green Energy Co., Ltd. Busan Green Energy Co., Ltd. Busan Green Energy Co., Ltd.
Name of Principal obligor Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others
Amount of guarantees ₩ 12,537    
Collateralized money invested      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor KEPCO Plant Service & Engineering Co., Ltd. KEPCO Plant Service & Engineering Co., Ltd. KEPCO Plant Service & Engineering Co., Ltd.
Name of Guarantee Incheon New Power Co., Ltd. Incheon New Power Co., Ltd. Incheon New Power Co., Ltd.
Name of Principal obligor Shinhan Bank Shinhan Bank Shinhan Bank
Amount of guarantees ₩ 579    
Guarantees for supplemental funding and others      
Disclosure of Guarantees provided between the related parties [Line Items]      
Name of Primary guarantor KEPCO Plant Service & Engineering Co., Ltd. [1] KEPCO Plant Service & Engineering Co., Ltd. [1] KEPCO Plant Service & Engineering Co., Ltd. [1]
Name of Guarantee Incheon New Power Co., Ltd. [1] Incheon New Power Co., Ltd. [1] Incheon New Power Co., Ltd. [1]
Name of Principal obligor Shinhan Bank [1] Shinhan Bank [1] Shinhan Bank [1]
Amount of guarantees ₩ 0 [1]    
[1] The Company guarantees to provide supplemental funding for business with respect to excessive business expenses or insufficient repayment of borrowings.
[2] The common stocks of Dongducheon Dream Power Co., Ltd. held by the Company were pledged as collateral.
[3] This includes a guarantee for the shareholder's capital payment in connection with the business of 190MW gas complex thermal power plant in Jamaica. EWP Barbados 1 SRL's capital contribution amount is USD 14,730 thousand and the total amount of guarantees is USD 8,257.5 thousand which consists of USD 3,670 thousand of EWP (Barbados) 1 SRL's contribution obligation and USD 4,587.5 thousand of South Jamaica Energy Holding Limited's portion (50%) of contribution obligation.
[4] The Company has the obligation 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. In relation to this guarantee, the Company has recognized KRW2,155 million of derivative liabilities as of December 31, 2018.
[5] The Company recognized impairment loss on all of the equity securities of Hyundai Energy Co., Ltd. in prior years, and the acquisition cost of the securities provided as collateral is KRW47,067 million
[6] Pursuant to the guarantee agreement, the Company recognized other provisions of KRW40,898 million as the possibility of economic outflow to fulfill the obligation was probable and the amount could be reasonably estimated.
[7] The Company has granted the right to Hana Financial Investment Co., Ltd., as an agent for the creditors to Expressway Solar-light Power Generation Co., Ltd. ("ESPG"), to the effect that in the event of acceleration of ESPG's payment obligations under certain borrowings to such creditors, Hana Financial may demand the Company to dispose of shares in ESPG held by the Company and apply the resulting proceeds to repayment of ESPG's obligations.