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Related Parties - Summary of Guarantees Provided To Related Parties (Details)
ر.س in Thousands, $ in Thousands, $ in Thousands, ₩ in Millions
 12 Months Ended
Dec. 31, 2023
USD ($)
Dec. 31, 2023
MXN ($)
Dec. 31, 2023
KRW (₩)
Dec. 31, 2023
SAR (ر.س)
Performance guarantees 1        
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 Korea Electric Power Corporation
Name of Principal obligor Shuweihat Asia Operation & Maintenance Company Shuweihat Asia Operation & Maintenance Company Shuweihat Asia Operation & Maintenance Company Shuweihat Asia Operation & Maintenance Company
Amount of guarantees | $ $ 11,000      
Name of Guarantee Shuweihat Asia Power Investment B.V. Shuweihat Asia Power Investment B.V. Shuweihat Asia Power Investment B.V. Shuweihat Asia Power Investment B.V.
Performance guarantees and others 1        
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 Korea Electric Power Corporation
Name of Principal obligor Rabigh Operation & Maintenance Company Limited Rabigh Operation & Maintenance Company Limited Rabigh Operation & Maintenance Company Limited Rabigh Operation & Maintenance Company Limited
Amount of guarantees | $ $ 1,387      
Name of Guarantee Rabigh Electricity Company Rabigh Electricity Company Rabigh Electricity Company Rabigh Electricity Company
Performance guarantees and others 2        
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 Korea Electric Power Corporation
Name of Principal obligor Nghi Son 2 Power LLC Nghi Son 2 Power LLC Nghi Son 2 Power LLC Nghi Son 2 Power LLC
Amount of guarantees | $ $ 40,738      
Name of Guarantee SMBC Singapore and others SMBC Singapore and others SMBC Singapore and others SMBC Singapore and others
Debt guarantees 1        
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 Korea Electric Power Corporation
Name of Principal obligor Barakah One Company Barakah One Company Barakah One Company Barakah One Company
Amount of guarantees | $ $ 1,223,355      
Name of Guarantee Export-Import Bank of Korea and others Export-Import Bank of Korea and others Export-Import Bank of Korea and others Export-Import Bank of Korea and others
Performance guarantees and others 3        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees | $ $ 4,103,269      
Performance guarantees 2        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor Korea Electric Power Corporation [1] Korea Electric Power Corporation [1] Korea Electric Power Corporation [1] Korea Electric Power Corporation [1]
Name of Principal obligor RE Holiday Holdings LLC [1] RE Holiday Holdings LLC [1] RE Holiday Holdings LLC [1] RE Holiday Holdings LLC [1]
Amount of guarantees | $ $ 222,077 [1]      
Name of Guarantee EFS Renewables Holdings, LLC, CA-CIB and others [1] EFS Renewables Holdings, LLC, CA-CIB and others [1] EFS Renewables Holdings, LLC, CA-CIB and others [1] EFS Renewables Holdings, LLC, CA-CIB and others [1]
Performance guarantees 3        
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 Korea Electric Power Corporation
Name of Principal obligor RE Pioneer Holdings LLC RE Pioneer Holdings LLC RE Pioneer Holdings LLC RE Pioneer Holdings LLC
Amount of guarantees | $ $ 106,873      
Name of Guarantee EFS Renewables Holdings, LLC EFS Renewables Holdings, LLC EFS Renewables Holdings, LLC EFS Renewables Holdings, LLC
Performance guarantees 4        
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 Korea Electric Power Corporation
Name of Principal obligor Rabigh Electricity Company Rabigh Electricity Company Rabigh Electricity Company Rabigh Electricity Company
Amount of guarantees | $ $ 4,151      
Name of Guarantee Hana Bank Hana Bank Hana Bank Hana Bank
Performance guarantees 5        
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 Korea Electric Power Corporation
Name of Principal obligor Shuweihat Asia Power Investment B.V. Shuweihat Asia Power Investment B.V. Shuweihat Asia Power Investment B.V. Shuweihat Asia Power Investment B.V.
Amount of guarantees | $ $ 50,000      
Name of Guarantee ING Bank ING Bank ING Bank ING Bank
Performance guarantees 6        
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 Korea Electric Power Corporation
Name of Principal obligor Amman Asia Electric Power Company Amman Asia Electric Power Company Amman Asia Electric Power Company Amman Asia Electric Power Company
Amount of guarantees | $ $ 17,400      
Name of Guarantee Shinhan Bank Shinhan Bank Shinhan Bank Shinhan Bank
Other performance guarantees 1        
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 Korea Electric Power Corporation
Name of Principal obligor Horus Solar, S.A. de C.V. Horus Solar, S.A. de C.V. Horus Solar, S.A. de C.V. Horus Solar, S.A. de C.V.
Amount of guarantees | $   $ 16,413    
Name of Guarantee CENACE and others CENACE and others CENACE and others CENACE and others
Other performance guarantees 2        
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 Korea Electric Power Corporation
Name of Principal obligor Recursos Solares PV de Mexico II, S.A. de C.V. Recursos Solares PV de Mexico II, S.A. de C.V. Recursos Solares PV de Mexico II, S.A. de C.V. Recursos Solares PV de Mexico II, S.A. de C.V.
Amount of guarantees $ 393 $ 1,518    
Name of Guarantee SEMARNAT / CFE Transmission SEMARNAT / CFE Transmission SEMARNAT / CFE Transmission SEMARNAT / CFE Transmission
Other performance guarantees 3        
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 Korea Electric Power Corporation
Name of Principal obligor Sunmex Renovables, S.A. de C.V. Sunmex Renovables, S.A. de C.V. Sunmex Renovables, S.A. de C.V. Sunmex Renovables, S.A. de C.V.
Amount of guarantees $ 9,078 $ 3,666    
Name of Guarantee CENACE / SEMARNAT CENACE / SEMARNAT CENACE / SEMARNAT CENACE / SEMARNAT
Performance guarantees 7        
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 Korea Electric Power Corporation
Name of Principal obligor International Offshore Power Transmission Holding Company Limited International Offshore Power Transmission Holding Company Limited International Offshore Power Transmission Holding Company Limited International Offshore Power Transmission Holding Company Limited
Amount of guarantees | $ $ 52,500      
Name of Guarantee Mizuho Bank Mizuho Bank Mizuho Bank Mizuho Bank
Other performance guarantees 4        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees | $ $ 7,000      
Name of Guarantee Credit Agricole Credit Agricole Credit Agricole Credit Agricole
Collateralized money invested 1        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor Korea Electric Power Corporation [2] Korea Electric Power Corporation [2] Korea Electric Power Corporation [2] Korea Electric Power Corporation [2]
Name of Principal obligor Pulau Indah Power Plant Sdn. Bhd. [2] Pulau Indah Power Plant Sdn. Bhd. [2] Pulau Indah Power Plant Sdn. Bhd. [2] Pulau Indah Power Plant Sdn. Bhd. [2]
Amount of guarantees     ₩ 13,210 [2]  
Name of Guarantee Malaysian Trustee Berhad [2] Malaysian Trustee Berhad [2] Malaysian Trustee Berhad [2] Malaysian Trustee Berhad [2]
Debt guarantees 2        
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 Korea Electric Power Corporation
Name of Principal obligor KEPCO for Power Company KEPCO for Power Company KEPCO for Power Company KEPCO for Power Company
Amount of guarantees | $ $ 60,000      
Name of Guarantee Riyad bank Riyad bank Riyad bank Riyad bank
Other performance guarantees 5        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees | $ $ 70,000      
Name of Guarantee SMBC Seoul and others SMBC Seoul and others SMBC Seoul and others SMBC Seoul and others
Collateralized money invested 2        
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. Korea Western Power Co., Ltd.
Name of Principal obligor Cheongna Energy Co., Ltd. Cheongna Energy Co., Ltd. Cheongna Energy Co., Ltd. Cheongna Energy Co., Ltd.
Amount of guarantees     ₩ 25,549  
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others
Guarantees for supplemental funding 1        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 3        
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. Korea Western Power Co., Ltd.
Name of Principal obligor Xe-Pian Xe-Namnoy Power Co., Ltd. Xe-Pian Xe-Namnoy Power Co., Ltd. Xe-Pian Xe-Namnoy Power Co., Ltd. Xe-Pian Xe-Namnoy Power Co., Ltd.
Amount of guarantees     ₩ 116,378  
Name of Guarantee Krung Thai Bank Krung Thai Bank Krung Thai Bank Krung Thai Bank
Impounding bonus guarantees        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees | $ $ 5,000 [4]      
Name of Guarantee SK Eco Plant Co., Ltd. [4] SK Eco Plant Co., Ltd. [4] SK Eco Plant Co., Ltd. [4] SK Eco Plant Co., Ltd. [4]
Performance guarantees and others 4        
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. Korea Western Power Co., Ltd.
Name of Principal obligor Rabigh Operation & Maintenance Company Limited Rabigh Operation & Maintenance Company Limited Rabigh Operation & Maintenance Company Limited Rabigh Operation & Maintenance Company Limited
Amount of guarantees | ر.س       ر.س 11,200
Name of Guarantee National Bank of Kuwait National Bank of Kuwait National Bank of Kuwait National Bank of Kuwait
Collateralized money invested 4        
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 Korea Western Power Co., Ltd
Name of Principal obligor Daegu Photovoltaic Co., Ltd. Daegu Photovoltaic Co., Ltd. Daegu Photovoltaic Co., Ltd. Daegu Photovoltaic Co., Ltd.
Amount of guarantees     ₩ 2,804  
Name of Guarantee Korea Development Bank Korea Development Bank Korea Development Bank Korea Development Bank
Collateralized money invested 5        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor Korea Western Power Co., Ltd. [5] Korea Western Power Co., Ltd. [5] Korea Western Power Co., Ltd. [5] Korea Western Power Co., Ltd. [5]
Name of Principal obligor Dongducheon Dream Power Co., Ltd. [5] Dongducheon Dream Power Co., Ltd. [5] Dongducheon Dream Power Co., Ltd. [5] Dongducheon Dream Power Co., Ltd. [5]
Amount of guarantees     ₩ 50,682 [5]  
Name of Guarantee Kookmin Bank and others [5] Kookmin Bank and others [5] Kookmin Bank and others [5] Kookmin Bank and others [5]
Debt guarantees 3        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 20,300  
Name of Guarantee Hanyang Securities Hanyang Securities Hanyang Securities Hanyang Securities
Collateralized money invested 6        
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 Korea Western Power Co., Ltd
Name of Principal obligor PT. Mutiara Jawa PT. Mutiara Jawa PT. Mutiara Jawa PT. Mutiara Jawa
Amount of guarantees     ₩ 5,168  
Name of Guarantee Woori Bank Woori Bank Woori Bank Woori Bank
Collateralized money invested 7        
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. Korea Western Power Co., Ltd.
Name of Principal obligor Haeng Bok Do Si Photovoltaic Power Co., Ltd. Haeng Bok Do Si Photovoltaic Power Co., Ltd. Haeng Bok Do Si Photovoltaic Power Co., Ltd. Haeng Bok Do Si Photovoltaic Power Co., Ltd.
Amount of guarantees     ₩ 294  
Name of Guarantee Nonghyup Bank Nonghyup Bank Nonghyup Bank Nonghyup Bank
Collateralized money invested 8        
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. Korea Western Power Co., Ltd.
Name of Principal obligor Shin Pyeongtaek Power Co., Ltd. Shin Pyeongtaek Power Co., Ltd. Shin Pyeongtaek Power Co., Ltd. Shin Pyeongtaek Power Co., Ltd.
Amount of guarantees     ₩ 145,025  
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others
Guarantees for supplemental funding 2        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 9        
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. Korea Western Power Co., Ltd.
Name of Principal obligor Haemodum Solar Co., Ltd. Haemodum Solar Co., Ltd. Haemodum Solar Co., Ltd. Haemodum Solar Co., Ltd.
Amount of guarantees     ₩ 3,122  
Name of Guarantee Nonghyup Bank Nonghyup Bank Nonghyup Bank Nonghyup Bank
Collateralized money invested 10        
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. Korea Western Power Co., Ltd.
Name of Principal obligor Muan Solar Park Co., Ltd. Muan Solar Park Co., Ltd. Muan Solar Park Co., Ltd. Muan Solar Park Co., Ltd.
Amount of guarantees     ₩ 6,830  
Name of Guarantee IBK and others IBK and others IBK and others IBK and others
Collateralized money invested 11        
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. Korea Western Power Co., Ltd.
Name of Principal obligor Anjwa Smart Farm & Solar City Co., Ltd. Anjwa Smart Farm & Solar City Co., Ltd. Anjwa Smart Farm & Solar City Co., Ltd. Anjwa Smart Farm & Solar City Co., Ltd.
Amount of guarantees     ₩ 7,665  
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank and others
Collateralized money invested 12        
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. Korea Western Power Co., Ltd.
Name of Principal obligor Seoroseoro Sunny Power Plant Co., Ltd. Seoroseoro Sunny Power Plant Co., Ltd. Seoroseoro Sunny Power Plant Co., Ltd. Seoroseoro Sunny Power Plant Co., Ltd.
Amount of guarantees     ₩ 941  
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank and others
Collateralized money invested 13        
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. Korea Western Power Co., Ltd.
Name of Principal obligor YuDang Solar Co., Ltd. YuDang Solar Co., Ltd. YuDang Solar Co., Ltd. YuDang Solar Co., Ltd.
Amount of guarantees     ₩ 570  
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank and others
Guarantees for supplemental funding 3        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 14        
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. Korea Western Power Co., Ltd.
Name of Principal obligor Hapcheon Floating Photovoltaic Power Plant Inc. Hapcheon Floating Photovoltaic Power Plant Inc. Hapcheon Floating Photovoltaic Power Plant Inc. Hapcheon Floating Photovoltaic Power Plant Inc.
Amount of guarantees     ₩ 10,348  
Name of Guarantee Nonghyup Bank and others Nonghyup Bank and others Nonghyup Bank and others Nonghyup Bank and others
Collateralized money invested 15        
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. Korea Western Power Co., Ltd.
Name of Principal obligor Yeongwol Eco Wind Co., Ltd. Yeongwol Eco Wind Co., Ltd. Yeongwol Eco Wind Co., Ltd. Yeongwol Eco Wind Co., Ltd.
Amount of guarantees     ₩ 4,024  
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank and others
Guarantees for supplemental funding 4        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 16        
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. Korea Western Power Co., Ltd.
Name of Principal obligor Gurae Resident Power Co., Ltd. Gurae Resident Power Co., Ltd. Gurae Resident Power Co., Ltd. Gurae Resident Power Co., Ltd.
Amount of guarantees     ₩ 569  
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank and others
Guarantees for supplemental funding 5        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 17        
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 Korea Western Power Co., Ltd
Name of Principal obligor Gunsan Land Solar Co., Ltd. Gunsan Land Solar Co., Ltd. Gunsan Land Solar Co., Ltd. Gunsan Land Solar Co., Ltd.
Amount of guarantees     ₩ 22,429  
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank and others
Guarantees for supplemental funding 6        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0  
Collateralized money invested 18        
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 Korea Western Power Co., Ltd
Name of Principal obligor Seobusambo highway photovoltaics Co., Ltd. Seobusambo highway photovoltaics Co., Ltd. Seobusambo highway photovoltaics Co., Ltd. Seobusambo highway photovoltaics Co., Ltd.
Amount of guarantees     ₩ 3,580  
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank and others
Guarantees for supplemental funding 7        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 19        
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 Korea Western Power Co., Ltd
Name of Principal obligor Eumseong Eco Park Co., Ltd. Eumseong Eco Park Co., Ltd. Eumseong Eco Park Co., Ltd. Eumseong Eco Park Co., Ltd.
Amount of guarantees     ₩ 8,386  
Name of Guarantee Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others
Collateralized money invested 20        
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 Korea Western Power Co., Ltd
Name of Principal obligor PungBack Wind Farm Corporation PungBack Wind Farm Corporation PungBack Wind Farm Corporation PungBack Wind Farm Corporation
Amount of guarantees     ₩ 7,940  
Name of Guarantee Hanwha Life Insurance Co., Ltd. and others Hanwha Life Insurance Co., Ltd. and others Hanwha Life Insurance Co., Ltd. and others Hanwha Life Insurance Co., Ltd. and others
Loan payment guarantee        
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 Korea Western Power Co., Ltd
Name of Principal obligor Wadi Noor Solar Power Company SAOC Wadi Noor Solar Power Company SAOC Wadi Noor Solar Power Company SAOC Wadi Noor Solar Power Company SAOC
Amount of guarantees | $ $ 54,855      
Name of Guarantee DBS Bank DBS Bank DBS Bank DBS Bank
Collateralized money invested 21        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor Busan Shinho Solar Power Co., Ltd. Busan Shinho Solar Power Co., Ltd. Busan Shinho Solar Power Co., Ltd. Busan Shinho Solar Power Co., Ltd.
Amount of guarantees     ₩ 6,669  
Name of Guarantee Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others
Collateralized money invested 22        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor Seokmun Energy Co., Ltd. Seokmun Energy Co., Ltd. Seokmun Energy Co., Ltd. Seokmun Energy Co., Ltd.
Amount of guarantees     ₩ 16,591  
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others
Guarantees for supplemental funding 8        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 23        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor Chun-cheon Energy Co., Ltd. Chun-cheon Energy Co., Ltd. Chun-cheon Energy Co., Ltd. Chun-cheon Energy Co., Ltd.
Amount of guarantees     ₩ 35,083  
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others
Guarantees for supplemental funding 9        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 90,800 [3]  
Collateralized money invested 24        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor Honam Wind Power Co., Ltd. Honam Wind Power Co., Ltd. Honam Wind Power Co., Ltd. Honam Wind Power Co., Ltd.
Amount of guarantees     ₩ 4,743  
Name of Guarantee Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others
Collateralized money invested 25        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor GS Donghae Electric Power Co., Ltd. GS Donghae Electric Power Co., Ltd. GS Donghae Electric Power Co., Ltd. GS Donghae Electric Power Co., Ltd.
Amount of guarantees     ₩ 259,084  
Name of Guarantee Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others
Collateralized money invested 26        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor Yeonggwangbaeksu Wind Power Co., Ltd. Yeonggwangbaeksu Wind Power Co., Ltd. Yeonggwangbaeksu Wind Power Co., Ltd. Yeonggwangbaeksu Wind Power Co., Ltd.
Amount of guarantees     ₩ 3,443  
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others
Collateralized money invested 27        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor Yeonggwang Wind Power Co., Ltd. Yeonggwang Wind Power Co., Ltd. Yeonggwang Wind Power Co., Ltd. Yeonggwang Wind Power Co., Ltd.
Amount of guarantees     ₩ 23,380  
Name of Guarantee KDB Capital Corporation and others KDB Capital Corporation and others KDB Capital Corporation and others KDB Capital Corporation and others
Collateralized money invested 28        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor Daesan Green Energy Co., Ltd. Daesan Green Energy Co., Ltd. Daesan Green Energy Co., Ltd. Daesan Green Energy Co., Ltd.
Amount of guarantees     ₩ 22,191  
Name of Guarantee IBK IBK IBK IBK
Guarantees for supplemental funding 10        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 29        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor Taebaek Gadeoksan Wind Power Co., Ltd. Taebaek Gadeoksan Wind Power Co., Ltd. Taebaek Gadeoksan Wind Power Co., Ltd. Taebaek Gadeoksan Wind Power Co., Ltd.
Amount of guarantees     ₩ 19,426  
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank and others
Other guarantees 1        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor PT. Tanjung Power Indonesia PT. Tanjung Power Indonesia PT. Tanjung Power Indonesia PT. Tanjung Power Indonesia
Amount of guarantees | $ $ 3,150      
Name of Guarantee PT. Adaro Indonesia PT. Adaro Indonesia PT. Adaro Indonesia PT. Adaro Indonesia
Guarantees for supplemental funding 11        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Name of Guarantee Sumitomo mitsui banking and others [3] Sumitomo mitsui banking and others [3] Sumitomo mitsui banking and others [3] Sumitomo mitsui banking and others [3]
Collateralized money invested 30        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 90,151  
Name of Guarantee MUFG and others MUFG and others MUFG and others MUFG and others
Performance guarantees 8        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor Korea East-West Power Co., Ltd. [6] Korea East-West Power Co., Ltd. [6] Korea East-West Power Co., Ltd. [6] Korea East-West Power Co., Ltd. [6]
Name of Principal obligor South Jamaica Power Company Limited [6] South Jamaica Power Company Limited [6] South Jamaica Power Company Limited [6] South Jamaica Power Company Limited [6]
Amount of guarantees | $ $ 14,400 [6]      
Name of Guarantee Hana Bank [6] Hana Bank [6] Hana Bank [6] Hana Bank [6]
Collateralized money invested 31        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 43,109  
Name of Guarantee JCSD Trustee Services Limited and others JCSD Trustee Services Limited and others JCSD Trustee Services Limited and others JCSD Trustee Services Limited and others
Collateralized money invested 32        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor DE Energia SpA DE Energia SpA DE Energia SpA DE Energia SpA
Amount of guarantees     ₩ 9,703  
Name of Guarantee Mirae Asset Securities Co., Ltd. and others Mirae Asset Securities Co., Ltd. and others Mirae Asset Securities Co., Ltd. and others Mirae Asset Securities Co., Ltd. and others
Collateralized loans        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees | $ $ 5,728      
Payment guarantees        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees | $ $ 959 [7]      
Name of Guarantee Hana Bank [7] Hana Bank [7] Hana Bank [7] Hana Bank [7]
Collateralized money invested 33        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor Bitsolar Energy Co., Ltd. Bitsolar Energy Co., Ltd. Bitsolar Energy Co., Ltd. Bitsolar Energy Co., Ltd.
Amount of guarantees     ₩ 352  
Name of Guarantee Mirae Asset Life Insurance Co., Ltd. and others Mirae Asset Life Insurance Co., Ltd. and others Mirae Asset Life Insurance Co., Ltd. and others Mirae Asset Life Insurance Co., Ltd. and others
Collateralized money invested 34        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor Cheongju Eco Park Co., Ltd. Cheongju Eco Park Co., Ltd. Cheongju Eco Park Co., Ltd. Cheongju Eco Park Co., Ltd.
Amount of guarantees     ₩ 9,072  
Name of Guarantee Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others
Collateralized money invested 35        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor Busan Industrial Solar Power Co., Ltd. Busan Industrial Solar Power Co., Ltd. Busan Industrial Solar Power Co., Ltd. Busan Industrial Solar Power Co., Ltd.
Amount of guarantees     ₩ 1,058  
Name of Guarantee Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others
Collateralized money invested 36        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor Yangyang Wind Power Co., Ltd. Yangyang Wind Power Co., Ltd. Yangyang Wind Power Co., Ltd. Yangyang Wind Power Co., Ltd.
Amount of guarantees     ₩ 10,435  
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank and others
Guarantees for supplemental funding 12        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 37        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.) KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.) KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.) KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.)
Amount of guarantees     ₩ 7,779  
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank and others
Collateralized money invested 38        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor Goheung New Energy Co., Ltd. Goheung New Energy Co., Ltd. Goheung New Energy Co., Ltd. Goheung New Energy Co., Ltd.
Amount of guarantees     ₩ 4,808  
Name of Guarantee Woori Bank and others Woori Bank and others Woori Bank and others Woori Bank and others
Collateralized money invested 39        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor Seungmun Green Energy Seungmun Green Energy Seungmun Green Energy Seungmun Green Energy
Amount of guarantees     ₩ 9,757  
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank and others
Guarantees for supplemental funding 13        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 40        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor Yanggu Floating Photovoltaic Power Plant Inc. Yanggu Floating Photovoltaic Power Plant Inc. Yanggu Floating Photovoltaic Power Plant Inc. Yanggu Floating Photovoltaic Power Plant Inc.
Amount of guarantees     ₩ 760  
Name of Guarantee Korea Development Bank Korea Development Bank Korea Development Bank Korea Development Bank
Collateralized money invested 41        
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. Korea East-West Power Co., Ltd.
Name of Principal obligor Hoenggye Renewable Energy Co., Ltd. Hoenggye Renewable Energy Co., Ltd. Hoenggye Renewable Energy Co., Ltd. Hoenggye Renewable Energy Co., Ltd.
Amount of guarantees     ₩ 2,375  
Name of Guarantee IBK IBK IBK IBK
Guarantees for supplemental funding 14        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 42        
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. Korea Southern Power Co., Ltd.
Name of Principal obligor KNH Solar Co., Ltd. KNH Solar Co., Ltd. KNH Solar Co., Ltd. KNH Solar Co., Ltd.
Amount of guarantees     ₩ 3,194  
Name of Guarantee Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others
Performance guarantees and guarantees for supplemental funding        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 43        
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. Korea Southern Power Co., Ltd.
Name of Principal obligor Daeryun Power Co., Ltd. Daeryun Power Co., Ltd. Daeryun Power Co., Ltd. Daeryun Power Co., Ltd.
Amount of guarantees     ₩ 26,834  
Name of Guarantee Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others
Collateralized money invested 44        
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. Korea Southern Power Co., Ltd.
Name of Principal obligor Daegu Green Power Co., Ltd. Daegu Green Power Co., Ltd. Daegu Green Power Co., Ltd. Daegu Green Power Co., Ltd.
Amount of guarantees     ₩ 26,430  
Name of Guarantee Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others
Performance guarantees 9        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Performance guarantees 10        
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. Korea Southern Power Co., Ltd.
Name of Principal obligor Kelar S.A. Kelar S.A. Kelar S.A. Kelar S.A.
Amount of guarantees | $ $ 33,930      
Name of Guarantee Hana Bank, MUFG Hana Bank, MUFG Hana Bank, MUFG Hana Bank, MUFG
Payment guarantees 1        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees | $ $ 11,707 [8]      
Name of Guarantee Hana Bank [8] Hana Bank [8] Hana Bank [8] Hana Bank [8]
Performance guarantees 11        
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. Korea Southern Power Co., Ltd.
Name of Principal obligor Daehan Wind Power PSC Daehan Wind Power PSC Daehan Wind Power PSC Daehan Wind Power PSC
Amount of guarantees | $ $ 1,800      
Name of Guarantee Shinhan Bank Shinhan Bank Shinhan Bank Shinhan Bank
Payment guarantees 2        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees | $ $ 2,000 [9]      
Name of Guarantee Hana Bank [9] Hana Bank [9] Hana Bank [9] Hana Bank [9]
Collateralized money invested 45        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 16,426  
Name of Guarantee Standard Chartered Standard Chartered Standard Chartered Standard Chartered
Collateralized money invested 46        
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. Korea Southern Power Co., Ltd.
Name of Principal obligor Pyeongchang Wind Power Co., Ltd. Pyeongchang Wind Power Co., Ltd. Pyeongchang Wind Power Co., Ltd. Pyeongchang Wind Power Co., Ltd.
Amount of guarantees     ₩ 12,228  
Name of Guarantee Woori Bank, Shinhan Bank and others Woori Bank, Shinhan Bank and others Woori Bank, Shinhan Bank and others Woori Bank, Shinhan Bank and others
Performance guarantees 12        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0  
Collateralized money invested 47        
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. Korea Southern Power Co., Ltd.
Name of Principal obligor Taebaek Guinemi Wind Power Co., Ltd Taebaek Guinemi Wind Power Co., Ltd Taebaek Guinemi Wind Power Co., Ltd Taebaek Guinemi Wind Power Co., Ltd
Amount of guarantees     ₩ 13,530  
Name of Guarantee IBK IBK IBK IBK
Payment guarantees 3        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor Korea Southern Power Co., Ltd. [10] Korea Southern Power Co., Ltd. [10] Korea Southern Power Co., Ltd. [10] Korea Southern Power Co., Ltd. [10]
Name of Principal obligor Samcheok Eco Materials Co., Ltd. [10] Samcheok Eco Materials Co., Ltd. [10] Samcheok Eco Materials Co., Ltd. [10] Samcheok Eco Materials Co., Ltd. [10]
Amount of guarantees     ₩ 0 [10]  
Name of Guarantee SEM Investment Co., Ltd. [10] SEM Investment Co., Ltd. [10] SEM Investment Co., Ltd. [10] SEM Investment Co., Ltd. [10]
Performance guarantees 13        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [11]  
Collateralized money invested 48        
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. Korea Southern Power Co., Ltd.
Name of Principal obligor Solaseado Solar Power Co., Ltd Solaseado Solar Power Co., Ltd Solaseado Solar Power Co., Ltd Solaseado Solar Power Co., Ltd
Amount of guarantees     ₩ 13,370  
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others
Collateralized money invested 49        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor Korea Southern Power Co., Ltd. [12] Korea Southern Power Co., Ltd. [12] Korea Southern Power Co., Ltd. [12] Korea Southern Power Co., Ltd. [12]
Name of Principal obligor Naepo Green Energy Co., Ltd. [12] Naepo Green Energy Co., Ltd. [12] Naepo Green Energy Co., Ltd. [12] Naepo Green Energy Co., Ltd. [12]
Amount of guarantees     ₩ 5,285 [12]  
Name of Guarantee IBK and others [12] IBK and others [12] IBK and others [12] IBK and others [12]
Performance Guarantees And Guarantees For Supplemental Funding 1 [Member]        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 30,000 [3]  
Collateralized money invested 50        
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 Korea Southern Power Co., Ltd
Name of Principal obligor Omisan Wind Power Co., Ltd. Omisan Wind Power Co., Ltd. Omisan Wind Power Co., Ltd. Omisan Wind Power Co., Ltd.
Amount of guarantees     ₩ 10,229  
Name of Guarantee Shinhan Bank Shinhan Bank Shinhan Bank Shinhan Bank
Performance guarantees and guarantees for supplemental funding 2 [Member]        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 51        
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. Korea Southern Power Co., Ltd.
Name of Principal obligor Geumsungsan Wind Power Co., Ltd. Geumsungsan Wind Power Co., Ltd. Geumsungsan Wind Power Co., Ltd. Geumsungsan Wind Power Co., Ltd.
Amount of guarantees     ₩ 5,515  
Name of Guarantee Kookmin Bank Kookmin Bank Kookmin Bank Kookmin Bank
Collateralized money invested 52        
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. Korea Southern Power Co., Ltd.
Name of Principal obligor HORANG ENERGY Inc. HORANG ENERGY Inc. HORANG ENERGY Inc. HORANG ENERGY Inc.
Amount of guarantees     ₩ 4,149  
Name of Guarantee Woori Bank and others Woori Bank and others Woori Bank and others Woori Bank and others
Guarantees for supplemental funding 16        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 53        
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. Korea Southern Power Co., Ltd.
Name of Principal obligor Haman Green Energy Co., Ltd. Haman Green Energy Co., Ltd. Haman Green Energy Co., Ltd. Haman Green Energy Co., Ltd.
Amount of guarantees     ₩ 2,981  
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank and others
Guarantees for supplemental funding 17        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 54        
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. Korea Southern Power Co., Ltd.
Name of Principal obligor Jeongeup Green Power Co., Ltd. Jeongeup Green Power Co., Ltd. Jeongeup Green Power Co., Ltd. Jeongeup Green Power Co., Ltd.
Amount of guarantees     ₩ 1,560  
Name of Guarantee Woori Bank and others Woori Bank and others Woori Bank and others Woori Bank and others
Guarantees for supplemental funding 18        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Payment guarantees 4        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor KOSPO Power Services Ltda. KOSPO Power Services Ltda. KOSPO Power Services Ltda. KOSPO Power Services Ltda.
Name of Principal obligor Kelar S.A. Kelar S.A. Kelar S.A. Kelar S.A.
Amount of guarantees | $ $ 1,316      
Name of Guarantee Scotia bank Scotia bank Scotia bank Scotia bank
Collateralized money invested 55        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor KOSPO Chile SpA KOSPO Chile SpA KOSPO Chile SpA KOSPO Chile SpA
Name of Principal obligor Kelar S.A. Kelar S.A. Kelar S.A. Kelar S.A.
Amount of guarantees     ₩ 131,529  
Name of Guarantee Export-Import Bank of Korea and others Export-Import Bank of Korea and others Export-Import Bank of Korea and others Export-Import Bank of Korea and others
Collateralized money invested 56        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor KOSPO Chile SpA KOSPO Chile SpA KOSPO Chile SpA KOSPO Chile SpA
Name of Principal obligor Chester Solar I SpA Chester Solar I SpA Chester Solar I SpA Chester Solar I SpA
Amount of guarantees     ₩ 1,238  
Name of Guarantee IBK IBK IBK IBK
Collateralized money invested 57        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor KOSPO Chile SpA KOSPO Chile SpA KOSPO Chile SpA KOSPO Chile SpA
Name of Principal obligor Chester Solar IV SpA Chester Solar IV SpA Chester Solar IV SpA Chester Solar IV SpA
Amount of guarantees     ₩ 484  
Name of Guarantee IBK IBK IBK IBK
Collateralized money invested 58        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor KOSPO Chile SpA KOSPO Chile SpA KOSPO Chile SpA KOSPO Chile SpA
Name of Principal obligor Chester Solar V SpA Chester Solar V SpA Chester Solar V SpA Chester Solar V SpA
Amount of guarantees     ₩ 191  
Name of Guarantee IBK IBK IBK IBK
Collateralized money invested 59        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor KOSPO Chile SpA KOSPO Chile SpA KOSPO Chile SpA KOSPO Chile SpA
Name of Principal obligor Diego de Almagro Solar SpA Diego de Almagro Solar SpA Diego de Almagro Solar SpA Diego de Almagro Solar SpA
Amount of guarantees     ₩ 954  
Name of Guarantee IBK IBK IBK IBK
Collateralized money invested 60        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor KOSPO Chile SpA KOSPO Chile SpA KOSPO Chile SpA KOSPO Chile SpA
Name of Principal obligor Laurel SpA Laurel SpA Laurel SpA Laurel SpA
Amount of guarantees     ₩ 613  
Name of Guarantee IBK IBK IBK IBK
Collateralized money invested 61        
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 Korea Midland Power Co., Ltd
Name of Principal obligor YeongGwang Yaksu Wind Electric Co., Ltd. YeongGwang Yaksu Wind Electric Co., Ltd. YeongGwang Yaksu Wind Electric Co., Ltd. YeongGwang Yaksu Wind Electric Co., Ltd.
Amount of guarantees     ₩ 133  
Name of Guarantee IBK and others IBK and others IBK and others IBK and others
Collateralized money invested 62        
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. Korea Midland Power Co., Ltd.
Name of Principal obligor Hyundai Green Power Co., Ltd. Hyundai Green Power Co., Ltd. Hyundai Green Power Co., Ltd. Hyundai Green Power Co., Ltd.
Amount of guarantees     ₩ 118,172  
Name of Guarantee Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others
Debt guarantees 5        
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. Korea Midland Power Co., Ltd.
Name of Principal obligor PT Wampu Electric Power PT Wampu Electric Power PT Wampu Electric Power PT Wampu Electric Power
Amount of guarantees | $ $ 5,473      
Name of Guarantee PT. Bank KB Bukopin PT. Bank KB Bukopin PT. Bank KB Bukopin PT. Bank KB Bukopin
Debt guarantees 4        
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. Korea Midland Power Co., Ltd.
Name of Principal obligor PT. Cirebon Electric Power PT. Cirebon Electric Power PT. Cirebon Electric Power PT. Cirebon Electric Power
Amount of guarantees | $ $ 3,355      
Name of Guarantee Mizuho Bank Mizuho Bank Mizuho Bank Mizuho Bank
Guarantees for supplemental funding 19        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Name of Guarantee IBK and others [3] IBK and others [3] IBK and others [3] IBK and others [3]
Collateralized money invested 63        
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. Korea Midland Power Co., Ltd.
Name of Principal obligor Green Energy Electricity Generation Co., Ltd. Green Energy Electricity Generation Co., Ltd. Green Energy Electricity Generation Co., Ltd. Green Energy Electricity Generation Co., Ltd.
Amount of guarantees     ₩ 8  
Name of Guarantee IBK IBK IBK IBK
Collateralized money invested 64        
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. Korea Midland Power Co., Ltd.
Name of Principal obligor Yaksu ESS Co., Ltd. Yaksu ESS Co., Ltd. Yaksu ESS Co., Ltd. Yaksu ESS Co., Ltd.
Amount of guarantees     ₩ 285  
Name of Guarantee IBK IBK IBK IBK
Collateralized money invested 65        
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 Korea Midland Power Co., Ltd
Name of Principal obligor Gwangbaek Solar Power Investment Co., Ltd. Gwangbaek Solar Power Investment Co., Ltd. Gwangbaek Solar Power Investment Co., Ltd. Gwangbaek Solar Power Investment Co., Ltd.
Amount of guarantees     ₩ 5,155  
Name of Guarantee Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others
Collateralized money invested 66        
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. Korea Midland Power Co., Ltd.
Name of Principal obligor Muan Sunshine Solar Power Plant Co., Ltd. Muan Sunshine Solar Power Plant Co., Ltd. Muan Sunshine Solar Power Plant Co., Ltd. Muan Sunshine Solar Power Plant Co., Ltd.
Amount of guarantees     ₩ 2,822  
Name of Guarantee IBK IBK IBK IBK
Collateralized money invested 67        
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. Korea Midland Power Co., Ltd.
Name of Principal obligor Goesan Solar park Co., Ltd. Goesan Solar park Co., Ltd. Goesan Solar park Co., Ltd. Goesan Solar park Co., Ltd.
Amount of guarantees     ₩ 2,877  
Name of Guarantee IBK IBK IBK IBK
Collateralized money invested 68        
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. Korea Midland Power Co., Ltd.
Name of Principal obligor Bitgoel Eco Energy Co., Ltd. Bitgoel Eco Energy Co., Ltd. Bitgoel Eco Energy Co., Ltd. Bitgoel Eco Energy Co., Ltd.
Amount of guarantees     ₩ 7,328  
Name of Guarantee IBK and others IBK and others IBK and others IBK and others
Guarantees for supplemental funding 20        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 69        
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. Korea Midland Power Co., Ltd.
Name of Principal obligor Energyco Co., Ltd. Energyco Co., Ltd. Energyco Co., Ltd. Energyco Co., Ltd.
Amount of guarantees     ₩ 2,140  
Name of Guarantee Nonghyup Bank Nonghyup Bank Nonghyup Bank Nonghyup Bank
Payment Guarantees 5        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 2,700  
Name of Guarantee Shinhan bank Shinhan bank Shinhan bank Shinhan bank
Collateralized money invested 70        
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. Korea Midland Power Co., Ltd.
Name of Principal obligor Jeju Gimnyeong Wind Power Co., Ltd. Jeju Gimnyeong Wind Power Co., Ltd. Jeju Gimnyeong Wind Power Co., Ltd. Jeju Gimnyeong Wind Power Co., Ltd.
Amount of guarantees     ₩ 246  
Name of Guarantee Nonghyup Bank Nonghyup Bank Nonghyup Bank Nonghyup Bank
Collateralized money invested 71        
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. Korea Midland Power Co., Ltd.
Name of Principal obligor Dongbu Highway Solar Co., Ltd. Dongbu Highway Solar Co., Ltd. Dongbu Highway Solar Co., Ltd. Dongbu Highway Solar Co., Ltd.
Amount of guarantees     ₩ 380  
Name of Guarantee Shinhan Bank Shinhan Bank Shinhan Bank Shinhan Bank
Collateralized money invested 72        
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. Korea Midland Power Co., Ltd.
Name of Principal obligor Seobu Highway Solar Co., Ltd. Seobu Highway Solar Co., Ltd. Seobu Highway Solar Co., Ltd. Seobu Highway Solar Co., Ltd.
Amount of guarantees     ₩ 406  
Name of Guarantee Shinhan Bank Shinhan Bank Shinhan Bank Shinhan Bank
Collateralized money invested 73        
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. Korea Midland Power Co., Ltd.
Name of Principal obligor Yeongyang Wind Power Corporation II Yeongyang Wind Power Corporation II Yeongyang Wind Power Corporation II Yeongyang Wind Power Corporation II
Amount of guarantees     ₩ 10,100  
Name of Guarantee Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others
Collateralized money invested 74        
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. Korea Midland Power Co., Ltd.
Name of Principal obligor Haeparang Energy Co., Ltd. Haeparang Energy Co., Ltd. Haeparang Energy Co., Ltd. Haeparang Energy Co., Ltd.
Amount of guarantees     ₩ 2,104  
Name of Guarantee Templeton hana asset management Co. Ltd. Templeton hana asset management Co. Ltd. Templeton hana asset management Co. Ltd. Templeton hana asset management Co. Ltd.
Guarantees for supplemental funding 21        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 75        
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. Korea Midland Power Co., Ltd.
Name of Principal obligor Saemangeum Sebit Power Plant Co., Ltd. Saemangeum Sebit Power Plant Co., Ltd. Saemangeum Sebit Power Plant Co., Ltd. Saemangeum Sebit Power Plant Co., Ltd.
Amount of guarantees     ₩ 27,762  
Name of Guarantee IBK and others IBK and others IBK and others IBK and others
Guarantees for supplemental funding 22        
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. Korea Midland Power Co., Ltd.
Name of Principal obligor Saemangeum Sebit Power Plant Co., Ltd. Saemangeum Sebit Power Plant Co., Ltd. Saemangeum Sebit Power Plant Co., Ltd. Saemangeum Sebit Power Plant Co., Ltd.
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 76        
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. Korea Midland Power Co., Ltd.
Name of Principal obligor Yeomsubong Wind Power Co., Ltd. Yeomsubong Wind Power Co., Ltd. Yeomsubong Wind Power Co., Ltd. Yeomsubong Wind Power Co., Ltd.
Amount of guarantees     ₩ 871  
Name of Guarantee Korea Development Bank Korea Development Bank Korea Development Bank Korea Development Bank
Guarantees for supplemental funding 23        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 77        
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. Korea South-East Power Co., Ltd.
Name of Principal obligor Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) Boim Combined Heat and Power Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.)
Amount of guarantees     ₩ 0 [13]  
Name of Guarantee IBK [13] IBK [13] IBK [13] IBK [13]
Guarantees for supplemental funding and others 1        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 76,800 [3],[14]  
Name of Guarantee NH investment & securities Co., Ltd. and others [3],[14] NH investment & securities Co., Ltd. and others [3],[14] NH investment & securities Co., Ltd. and others [3],[14] NH investment & securities Co., Ltd. and others [3],[14]
Collateralized money invested 78        
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. Korea South-East Power Co., Ltd.
Name of Principal obligor RES Technology AD RES Technology AD RES Technology AD RES Technology AD
Amount of guarantees     ₩ 14,383  
Name of Guarantee UniCredit Bulbank and others UniCredit Bulbank and others UniCredit Bulbank and others UniCredit Bulbank and others
Collateralized money invested 79        
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. Korea South-East Power Co., Ltd.
Name of Principal obligor ASM-BG Investicii AD ASM-BG Investicii AD ASM-BG Investicii AD ASM-BG Investicii AD
Amount of guarantees     ₩ 14,739  
Name of Guarantee UniCredit Bulbank and others UniCredit Bulbank and others UniCredit Bulbank and others UniCredit Bulbank and others
Collateralized money invested 80        
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. Korea South-East Power Co., Ltd.
Name of Principal obligor Expressway Solar-light Power Generation Co., Ltd. Expressway Solar-light Power Generation Co., Ltd. Expressway Solar-light Power Generation Co., Ltd. Expressway Solar-light Power Generation Co., Ltd.
Amount of guarantees     ₩ 5,187 [3]  
Name of Guarantee Woori Bank [3] Woori Bank [3] Woori Bank [3] Woori Bank [3]
Collateralized money invested 81        
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. Korea South-East Power Co., Ltd.
Name of Principal obligor Goseong Green Power Co., Ltd. Goseong Green Power Co., Ltd. Goseong Green Power Co., Ltd. Goseong Green Power Co., Ltd.
Amount of guarantees     ₩ 287,624  
Name of Guarantee Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others
Collateralized money invested 82        
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. Korea South-East Power Co., Ltd.
Name of Principal obligor Gangneung Eco Power Co., Ltd. Gangneung Eco Power Co., Ltd. Gangneung Eco Power Co., Ltd. Gangneung Eco Power Co., Ltd.
Amount of guarantees     ₩ 254,929  
Name of Guarantee Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others Kyobo Life Insurance Co., Ltd. and others
Collateralized money invested 83        
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. Korea South-East Power Co., Ltd.
Name of Principal obligor PND Solar Co., Ltd. PND Solar Co., Ltd. PND Solar Co., Ltd. PND Solar Co., Ltd.
Amount of guarantees     ₩ 1,510  
Name of Guarantee IBK IBK IBK IBK
Collateralized money invested 84        
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. Korea South-East Power Co., Ltd.
Name of Principal obligor Hyundai Eco Energy Co., Ltd. Hyundai Eco Energy Co., Ltd. Hyundai Eco Energy Co., Ltd. Hyundai Eco Energy Co., Ltd.
Amount of guarantees     ₩ 7,947  
Name of Guarantee Samsung Life Insurance and others Samsung Life Insurance and others Samsung Life Insurance and others Samsung Life Insurance and others
Collateralized money invested 85        
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. Korea South-East Power Co., Ltd.
Name of Principal obligor Jaeun Resident Wind Power Plant Co., Ltd. Jaeun Resident Wind Power Plant Co., Ltd. Jaeun Resident Wind Power Plant Co., Ltd. Jaeun Resident Wind Power Plant Co., Ltd.
Amount of guarantees     ₩ 2,214  
Name of Guarantee IBK IBK IBK IBK
Collateralized money invested 86        
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. Korea South-East Power Co., Ltd.
Name of Principal obligor Chungsongmeon BongSan wind power Co., Ltd. Chungsongmeon BongSan wind power Co., Ltd. Chungsongmeon BongSan wind power Co., Ltd. Chungsongmeon BongSan wind power Co., Ltd.
Amount of guarantees     ₩ 2,665  
Name of Guarantee Kyobo Life Insurance Co.,Ltd. and others Kyobo Life Insurance Co.,Ltd. and others Kyobo Life Insurance Co.,Ltd. and others Kyobo Life Insurance Co.,Ltd. and others
Collateralized money invested 87        
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. Korea South-East Power Co., Ltd.
Name of Principal obligor Yeongam Solar Power Co., Ltd. Yeongam Solar Power Co., Ltd. Yeongam Solar Power Co., Ltd. Yeongam Solar Power Co., Ltd.
Amount of guarantees     ₩ 9,637  
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others
Collateralized money invested 88        
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. Korea South-East Power Co., Ltd.
Name of Principal obligor Samsu Wind Power Co., Ltd. Samsu Wind Power Co., Ltd. Samsu Wind Power Co., Ltd. Samsu Wind Power Co., Ltd.
Amount of guarantees     ₩ 3,022  
Name of Guarantee Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others
Collateralized money invested 89        
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. Korea South-East Power Co., Ltd.
Name of Principal obligor Saemangeum Heemang Photovoltaic Co., Ltd. Saemangeum Heemang Photovoltaic Co., Ltd. Saemangeum Heemang Photovoltaic Co., Ltd. Saemangeum Heemang Photovoltaic Co., Ltd.
Amount of guarantees     ₩ 14,420  
Name of Guarantee Woori Bank and others Woori Bank and others Woori Bank and others Woori Bank and others
Collateralized money invested 90        
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. Korea South-East Power Co., Ltd.
Name of Principal obligor Nepal Water & Energy Nepal Water & Energy Nepal Water & Energy Nepal Water & Energy
Amount of guarantees | $ $ 97,105      
Name of Guarantee International Finance International Finance International Finance International Finance
Business reserve payment guarantee        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Principal obligor Development Company Private Limited Development Company Private Limited Development Company Private Limited Development Company Private Limited
Amount of guarantees | $ $ 33,333      
Name of Guarantee Corporation and others Corporation and others Corporation and others Corporation and others
Collateralized money invested 91        
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. Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor Noeul Green Energy Co., Ltd. Noeul Green Energy Co., Ltd. Noeul Green Energy Co., Ltd. Noeul Green Energy Co., Ltd.
Amount of guarantees     ₩ 0  
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank and others
Collateralized money invested 92        
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 Korea Hydro & Nuclear Power Co., Ltd
Name of Principal obligor Busan Green Energy Co., Ltd. Busan Green Energy Co., Ltd. Busan Green Energy Co., Ltd. Busan Green Energy Co., Ltd.
Amount of guarantees     ₩ 3,260  
Name of Guarantee Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others
Guarantees for Supplemental Funding 24        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees     ₩ 0 [3]  
Collateralized money invested 93        
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. Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor Go deok Clean Energy Co., Ltd. Go deok Clean Energy Co., Ltd. Go deok Clean Energy Co., Ltd. Go deok Clean Energy Co., Ltd.
Amount of guarantees     ₩ 4,722  
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others
Collateralized money invested 94        
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. Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor Cheong-Song Noraesan Wind Power Co., Ltd. Cheong-Song Noraesan Wind Power Co., Ltd. Cheong-Song Noraesan Wind Power Co., Ltd. Cheong-Song Noraesan Wind Power Co., Ltd.
Amount of guarantees     ₩ 3,755  
Name of Guarantee Woori Bank and others Woori Bank and others Woori Bank and others Woori Bank and others
Collateralized money invested 95        
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. Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor Gwangyang Green Energy Co., Ltd. Gwangyang Green Energy Co., Ltd. Gwangyang Green Energy Co., Ltd. Gwangyang Green Energy Co., Ltd.
Amount of guarantees     ₩ 24,638  
Name of Guarantee Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others
Collateralized money invested 96        
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. Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor Gangneung Sacheon Fuel Cell Co., Ltd. Gangneung Sacheon Fuel Cell Co., Ltd. Gangneung Sacheon Fuel Cell Co., Ltd. Gangneung Sacheon Fuel Cell Co., Ltd.
Amount of guarantees     ₩ 7,869  
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank and others
Collateralized money invested 97        
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 Korea Hydro & Nuclear Power Co., Ltd
Name of Principal obligor Chuncheon Green Energy Co., Ltd. Chuncheon Green Energy Co., Ltd. Chuncheon Green Energy Co., Ltd. Chuncheon Green Energy Co., Ltd.
Amount of guarantees     ₩ 8,901  
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank and others
Collateralized money invested 98        
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. Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor Yangyang Suri Wind Power Co., Ltd. Yangyang Suri Wind Power Co., Ltd. Yangyang Suri Wind Power Co., Ltd. Yangyang Suri Wind Power Co., Ltd.
Amount of guarantees     ₩ 9,608  
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others
Collateralized money invested 99        
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. Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor Bigeum Resident Photovoltaic Power Co., Ltd. Bigeum Resident Photovoltaic Power Co., Ltd. Bigeum Resident Photovoltaic Power Co., Ltd. Bigeum Resident Photovoltaic Power Co., Ltd.
Amount of guarantees     ₩ 0  
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others
Collateralized money invested 100        
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. Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor Songsan Green Energy Co., Ltd. Songsan Green Energy Co., Ltd. Songsan Green Energy Co., Ltd. Songsan Green Energy Co., Ltd.
Amount of guarantees     ₩ 8,323  
Name of Guarantee Hana Bank Hana Bank Hana Bank Hana Bank
Collateralized Money Invested 101 [Member]        
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. Korea Hydro & Nuclear Power Co., Ltd.
Name of Principal obligor Changwon Nu-ri Energy Co., Ltd. Changwon Nu-ri Energy Co., Ltd. Changwon Nu-ri Energy Co., Ltd. Changwon Nu-ri Energy Co., Ltd.
Amount of guarantees     ₩ 8,026  
Name of Guarantee Hana Bank Hana Bank Hana Bank Hana Bank
Payment Guarantees 6        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor Korea Hydro & Nuclear Power Co., Ltd. [3],[15] Korea Hydro & Nuclear Power Co., Ltd. [3],[15] Korea Hydro & Nuclear Power Co., Ltd. [3],[15] Korea Hydro & Nuclear Power Co., Ltd. [3],[15]
Name of Principal obligor KAS INVESTMENT I LLC [3],[15] KAS INVESTMENT I LLC [3],[15] KAS INVESTMENT I LLC [3],[15] KAS INVESTMENT I LLC [3],[15]
Amount of guarantees | $ $ 9,770 [3],[15]      
Name of Guarantee WOORI AMERICA BANK [3],[15] WOORI AMERICA BANK [3],[15] WOORI AMERICA BANK [3],[15] WOORI AMERICA BANK [3],[15]
Payment guarantees 7        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor Korea Hydro & Nuclear Power Co., Ltd. [15] Korea Hydro & Nuclear Power Co., Ltd. [15] Korea Hydro & Nuclear Power Co., Ltd. [15] Korea Hydro & Nuclear Power Co., Ltd. [15]
Name of Principal obligor KAS INVESTMENT II LLC [15] KAS INVESTMENT II LLC [15] KAS INVESTMENT II LLC [15] KAS INVESTMENT II LLC [15]
Amount of guarantees | $ $ 9,730 [15]      
Name of Guarantee WOORI AMERICA BANK [15] WOORI AMERICA BANK [15] WOORI AMERICA BANK [15] WOORI AMERICA BANK [15]
[1] The credit limits of guarantees to RE Holiday Holdings LLC include the credit limits of guarantees to their subsidiaries
[2] The Company, together with other shareholders, has provided a guarantee for the project financing of Pulau Indah Power Plant Sdn. Bhd., by establishing the right of pledge on the shares of Pulau Indah Power Plant Sdn. Bhd.
[3] The Company guarantees to provide supplemental funding for business with respect to excessive business expenses or insufficient repayment of borrowings.
[4] Xe-Pian Xe-Namnoy Power Co., Ltd., an associate of the Company, has entered a contract to pay an incentive type of impounding bonus to SK Eco Plant Co., Ltd. when the Xe-Pian Xe-Na-mnoy Dam is completed. If Xe-Pian Xe-Namnoy Power Co., Ltd. fails to pay SK Eco Plant Co., Ltd., the Company guarantees the payment, and the amount is USD 5,000,000.
[5] The common stocks of Dongducheon Dream Power Co., Ltd. held by the Company were pledged as collateral.
[6] This is an L/C opening guarantee for the performance of each contract in relation to the power sales contract and gas supply contract of South Jamaica Power Company Limited, a joint venture of the Company.
[7] This includes a guarantee related to L/C for debt repayment allowance provided to DE Energia SpA, a joint venture of the Company.
[8] The Company provided a payment guarantee to Chile Kelar project for opening L/C for Debt Service Reserve Account (DSRA), and others.
[9] The Company provided a payment guarantee to Jordan Tafila wind power project for opening L/C for Debt Service Reserve Account (DSRA).
[10] Samcheok Eco Materials Co., Ltd., an associate of the Company has issued the hybrid bonds. If the bonds are not repaid by December 8, 2026, the parent company and shareholders except the parent company must purchase the bonds from the acquirer. As of December 31, 2023, derivative liabilities of W18,752,903,155 were recognized in relation to this obligation.
[11] The Company has entered into an agreement to settle and pay the estimated loss amount in case damages occur in relation to the fulfillment of the mandatory supply volume according to the mandatory supply agreement for coal ash.
[12] The Company recognized an impairment loss on all of the equity securities of Naepo Green Energy Co., Ltd. before the prior year, and the acquisition cost of the securities provided as collateral is ￦29,200 million.
[13] The Company recognized an impairment loss on all of the equity securities of Generation Co., Ltd. (formerly, Dayone Energy Co., Ltd.) before the prior year, and the acquisition cost of the securities provided as collateral is ￦47,067 million.
[14] Pursuant to the guarantee agreement, the Company recognized other provisions of ￦8,418 million as the possibility of economic benefit outflow to fulfill the obligation was deemed probable and the amount could be reasonably estimated.
[15] The credit limits of guarantees to KAS INVESTMENT I LLC, KAS INVESTMENT II LLC include the credit limits of guarantees to their subsidiaries.