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Related Parties - Summary of Guarantees Provided To Related Parties (Details)
₩ in Millions, ر.س in Millions, $ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
Dec. 31, 2024
SAR (ر.س)
Dec. 31, 2024
MXN ($)
Dec. 31, 2024
KRW (₩)
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]        
Amount of guarantees | $ $ 3,986,562      
Name of Guarantee FAB and others FAB and others FAB and others FAB and others
Performance guarantees and others 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 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
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 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 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 3        
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 | $ $ 203,981 [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 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 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 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 Rabigh Electricity Company Rabigh Electricity Company Rabigh Electricity Company Rabigh Electricity Company
Amount of guarantees | ر.س   ر.س 4,151    
Name of Guarantee Hana Bank Hana Bank Hana Bank Hana 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 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 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 | $     $ 14,843  
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   $ 4,929  
Name of Guarantee CENACE / CFE Transmission and others CENACE / CFE Transmission and others CENACE / CFE Transmission and others CENACE / CFE Transmission and others
Performance guarantees 7        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor Korea East-West Power Co., Ltd. [2] Korea East-West Power Co., Ltd. [2] Korea East-West Power Co., Ltd. [2] Korea East-West Power Co., Ltd. [2]
Name of Principal obligor South Jamaica Power Company Limited [2] South Jamaica Power Company Limited [2] South Jamaica Power Company Limited [2] South Jamaica Power Company Limited [2]
Amount of guarantees | $ $ 14,400 [2]      
Name of Guarantee Hana Bank [2] Hana Bank [2] Hana Bank [2] Hana Bank [2]
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 [3] Korea Electric Power Corporation [3] Korea Electric Power Corporation [3] Korea Electric Power Corporation [3]
Name of Principal obligor Pulau Indah Power Plant Sdn. Bhd. [3] Pulau Indah Power Plant Sdn. Bhd. [3] Pulau Indah Power Plant Sdn. Bhd. [3] Pulau Indah Power Plant Sdn. Bhd. [3]
Amount of guarantees       ₩ 13,210 [3]
Name of Guarantee Malaysian Trustee Berhad [3] Malaysian Trustee Berhad [3] Malaysian Trustee Berhad [3] Malaysian Trustee Berhad [3]
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 SMBC Seoul SMBC Seoul SMBC Seoul
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       ₩ 46,158
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 [4]
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       ₩ 73,064
Name of Guarantee Krung Thai Bank Krung Thai Bank Krung Thai Bank Krung Thai Bank
Collateralized money invested 4        
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       ₩ 54,242 [5]
Name of Guarantee Kookmin Bank and others [5] Kookmin Bank and others [5] Kookmin Bank and others [5] Kookmin Bank and others [5]
Collateralized money invested 5        
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       ₩ 5,735
Debt guarantees 3        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 20,300
Name of Guarantee HY western 1st co., Ltd HY western 1st co., Ltd HY western 1st co., Ltd HY western 1st co., Ltd
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 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       ₩ 361
Name of Guarantee Nonghyup Bank Nonghyup Bank Nonghyup Bank Nonghyup 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 Shin Pyeongtaek Power Co., Ltd. Shin Pyeongtaek Power Co., Ltd. Shin Pyeongtaek Power Co., Ltd. Shin Pyeongtaek Power Co., Ltd.
Amount of guarantees       ₩ 139,059
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others
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 Haemodum Solar Co., Ltd. Haemodum Solar Co., Ltd. Haemodum Solar Co., Ltd. Haemodum Solar Co., Ltd.
Amount of guarantees       ₩ 3,230
Name of Guarantee Nonghyup Bank Nonghyup Bank Nonghyup Bank Nonghyup Bank
Guarantees for supplemental funding 2        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 0 [4]
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 Muan Solar Park Co., Ltd. Muan Solar Park Co., Ltd. Muan Solar Park Co., Ltd. Muan Solar Park Co., Ltd.
Amount of guarantees       ₩ 6,267
Name of Guarantee IBK and others IBK and others IBK and others IBK and others
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 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       ₩ 8,298
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank 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 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       ₩ 1,030
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 YuDang Solar Co., Ltd YuDang Solar Co., Ltd YuDang Solar Co., Ltd YuDang Solar Co., Ltd
Amount of guarantees       ₩ 617
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 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       ₩ 11,334
Name of Guarantee Nonghyup Bank and others Nonghyup Bank and others Nonghyup Bank and others Nonghyup Bank and others
Guarantees for supplemental funding 3        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 0 [4]
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 Yeongwol Eco Wind Co., Ltd. Yeongwol Eco Wind Co., Ltd. Yeongwol Eco Wind Co., Ltd. Yeongwol Eco Wind Co., Ltd.
Amount of guarantees       ₩ 890
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana 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 Gurae Resident Power Co., Ltd. Gurae Resident Power Co., Ltd. Gurae Resident Power Co., Ltd. Gurae Resident Power Co., Ltd.
Amount of guarantees       ₩ 334
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 [4]
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 Gunsan Land Solar Co., Ltd. Gunsan Land Solar Co., Ltd. Gunsan Land Solar Co., Ltd. Gunsan Land Solar Co., Ltd.
Amount of guarantees       ₩ 23,163
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 [4]
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 Seobusambo highway photovoltaics Co., Ltd. Seobusambo highway photovoltaics Co., Ltd. Seobusambo highway photovoltaics Co., Ltd. Seobusambo highway photovoltaics Co., Ltd.
Amount of guarantees       ₩ 3,310
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 [4]
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 Eumseong Eco Park Co., Ltd. Eumseong Eco Park Co., Ltd. Eumseong Eco Park Co., Ltd. Eumseong Eco Park Co., Ltd.
Amount of guarantees       ₩ 11,613
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
Guarantees for supplemental funding 7        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 0 [4]
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 PungBack Wind Farm Corporation PungBack Wind Farm Corporation PungBack Wind Farm Corporation PungBack Wind Farm Corporation
Amount of guarantees       ₩ 7,760
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
Collateralized money invested 20        
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       ₩ 15,456
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin Bank 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 Chun-cheon Energy Co., Ltd. Chun-cheon Energy Co., Ltd. Chun-cheon Energy Co., Ltd. Chun-cheon Energy Co., Ltd.
Amount of guarantees       ₩ 36,599
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin 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 Honam Wind Power Co., Ltd. Honam Wind Power Co., Ltd. Honam Wind Power Co., Ltd. Honam Wind Power Co., Ltd.
Amount of guarantees       ₩ 4,833
Name of Guarantee Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others
Guarantees for supplemental funding 8        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 90,800 [4]
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 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       ₩ 279,432
Name of Guarantee Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others
Guarantees for supplemental funding 9        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 0 [4]
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 Yeonggwangbaeksu Wind Power Co., Ltd. Yeonggwangbaeksu Wind Power Co., Ltd. Yeonggwangbaeksu Wind Power Co., Ltd. Yeonggwangbaeksu Wind Power Co., Ltd.
Amount of guarantees       ₩ 3,730
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin 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 Yeonggwang Wind Power Co., Ltd. Yeonggwang Wind Power Co., Ltd. Yeonggwang Wind Power Co., Ltd. Yeonggwang Wind Power Co., Ltd.
Amount of guarantees       ₩ 26,146
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 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 Daesan Green Energy Co., Ltd. Daesan Green Energy Co., Ltd. Daesan Green Energy Co., Ltd. Daesan Green Energy Co., Ltd.
Amount of guarantees       ₩ 25,331
Name of Guarantee IBK IBK IBK IBK
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 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       ₩ 22,908
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank and others
Collateralized money invested 28        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 100,579
Name of Guarantee MUFG and others MUFG and others MUFG and others MUFG and others
Guarantees for supplemental funding 10        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 0 [4]
Name of Guarantee Sumitomo mitsui banking and others Sumitomo mitsui banking and others Sumitomo mitsui banking and others Sumitomo mitsui banking and others
Collateralized money invested 29        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 48,761
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
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 [4]
Collateralized money invested 30        
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       ₩ 0
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
Performance guarantees 8        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 0
Collateralized money invested 31        
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       ₩ 10,636
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 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 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       ₩ 1,160
Name of Guarantee Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others
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 Yangyang Wind Power Co., Ltd. Yangyang Wind Power Co., Ltd. Yangyang Wind Power Co., Ltd. Yangyang Wind Power Co., Ltd.
Amount of guarantees       ₩ 11,640
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank 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 KPE Green Energy Co., Ltd. KPE Green Energy Co., Ltd. KPE Green Energy Co., Ltd. KPE Green Energy Co., Ltd.
Amount of guarantees       ₩ 8,230
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank 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 Goheung New Energy Co., Ltd. Goheung New Energy Co., Ltd. Goheung New Energy Co., Ltd. Goheung New Energy Co., Ltd.
Amount of guarantees       ₩ 4,818
Name of Guarantee Woori Bank and others Woori Bank and others Woori Bank and others Woori 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 Seungmun Green Energy Seungmun Green Energy Seungmun Green Energy Seungmun Green Energy
Amount of guarantees       ₩ 12,745
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 [4]
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 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       ₩ 846
Name of Guarantee Korea Development Bank Korea Development Bank Korea Development Bank Korea Development Bank
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 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
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 Kumyang Eco Park Co., Ltd. Kumyang Eco Park Co., Ltd. Kumyang Eco Park Co., Ltd. Kumyang Eco Park Co., Ltd.
Amount of guarantees       ₩ 3,841
Name of Guarantee Woori Bank and others Woori Bank and others Woori Bank and others Woori Bank and others
Guarantees for supplemental funding 13        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 0 [4]
Collateralized money invested 40        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 18
Collateralized money invested 41        
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       ₩ 31,093
Name of Guarantee Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others Korea Development Bank and others
Guarantees for supplemental funding 14        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 0 [4]
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 Daegu Green Power Co., Ltd. Daegu Green Power Co., Ltd. Daegu Green Power Co., Ltd. Daegu Green Power Co., Ltd.
Amount of guarantees       ₩ 30,513
Name of Guarantee Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others
Collateralized money invested 43        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 21,328
Name of Guarantee Standard Chartered Standard Chartered Standard Chartered Standard Chartered
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 Pyeongchang Wind Power Co., Ltd. Pyeongchang Wind Power Co., Ltd. Pyeongchang Wind Power Co., Ltd. Pyeongchang Wind Power Co., Ltd.
Amount of guarantees       ₩ 12,147
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 9        
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 | $ $ 30,030      
Name of Guarantee Hana Bank, MUFG Hana Bank, MUFG Hana Bank, MUFG Hana Bank, MUFG
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 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 1        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees | $ $ 11,707 [6]      
Name of Guarantee Hana Bank [6] Hana Bank [6] Hana Bank [6] Hana Bank [6]
Performance guarantees 11        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 0
Payment guarantees 2        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees | $ $ 2,000 [7]      
Name of Guarantee Hana Bank [7] Hana Bank [7] Hana Bank [7] Hana Bank [7]
Collateralized money invested 45        
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       ₩ 13,559
Name of Guarantee IBK IBK IBK IBK
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 Solaseado Solar Power Co., Ltd. Solaseado Solar Power Co., Ltd. Solaseado Solar Power Co., Ltd. Solaseado Solar Power Co., Ltd.
Amount of guarantees       ₩ 16,979
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others
Performance guarantees 12        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 0 [8]
Name of Guarantee HC elementary materials [8] HC elementary materials [8] HC elementary materials [8] HC elementary materials [8]
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 Naepo Green Energy Co., Ltd. Naepo Green Energy Co., Ltd. Naepo Green Energy Co., Ltd. Naepo Green Energy Co., Ltd.
Amount of guarantees       ₩ 48,031
Name of Guarantee IBK and others IBK and others IBK and others IBK and others
Payment guarantees 3        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor Korea Southern Power Co., Ltd. [9] Korea Southern Power Co., Ltd. [9] Korea Southern Power Co., Ltd. [9] Korea Southern Power Co., Ltd. [9]
Name of Principal obligor Samcheok Eco Materials Co., Ltd. [9] Samcheok Eco Materials Co., Ltd. [9] Samcheok Eco Materials Co., Ltd. [9] Samcheok Eco Materials Co., Ltd. [9]
Amount of guarantees       ₩ 0 [9]
Name of Guarantee KIS SF the 22nd Co., Ltd. [9] KIS SF the 22nd Co., Ltd. [9] KIS SF the 22nd Co., Ltd. [9] KIS SF the 22nd Co., Ltd. [9]
Performance guarantees 13        
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 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 Omisan Wind Power Co., Ltd. Omisan Wind Power Co., Ltd. Omisan Wind Power Co., Ltd. Omisan Wind Power Co., Ltd.
Amount of guarantees       ₩ 10,859
Name of Guarantee Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others Shinhan 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. 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       ₩ 7,839
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others
Performance Guarantees And Guarantees For Supplemental Funding 1 [Member]        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 30,000 [4]
Guarantees for supplemental funding 15        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 0 [4]
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 HORANG ENERGY Inc. HORANG ENERGY Inc. HORANG ENERGY Inc. HORANG ENERGY Inc.
Amount of guarantees       ₩ 3,808
Name of Guarantee Woori Bank and others Woori Bank and others Woori Bank and others Woori Bank and others
Performance guarantees and guarantees for supplemental funding 2 [Member]        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 0 [4]
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 Haman Green Energy Co., Ltd. Haman Green Energy Co., Ltd. Haman Green Energy Co., Ltd. Haman Green Energy Co., Ltd.
Amount of guarantees       ₩ 2,810
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana Bank and others
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 Jeongeup Green Power Co., Ltd. Jeongeup Green Power Co., Ltd. Jeongeup Green Power Co., Ltd. Jeongeup Green Power Co., Ltd.
Amount of guarantees       ₩ 8,847
Name of Guarantee Mirae Asset Securities Co., Ltd. Mirae Asset Securities Co., Ltd. Mirae Asset Securities Co., Ltd. Mirae Asset Securities Co., Ltd.
Guarantees for supplemental funding 16        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 0 [4]
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 HyChangwon Fuel Cell. Co., Ltd. HyChangwon Fuel Cell. Co., Ltd. HyChangwon Fuel Cell. Co., Ltd. HyChangwon Fuel Cell. Co., Ltd.
Amount of guarantees       ₩ 9,277
Name of Guarantee Woori Bank and others Woori Bank and others Woori Bank and others Woori Bank and others
Guarantees for supplemental funding 17        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 0 [4]
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 Roof One Energy Co., Ltd. Roof One Energy Co., Ltd. Roof One Energy Co., Ltd. Roof One Energy Co., Ltd.
Amount of guarantees       ₩ 2,000
Name of Guarantee Woori Bank Woori Bank Woori Bank Woori Bank
Guarantees for supplemental funding 18        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 0 [4]
Payment guarantees 4        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor Korea Hydro & Nuclear Power Co., Ltd. [10] Korea Hydro & Nuclear Power Co., Ltd. [10] Korea Hydro & Nuclear Power Co., Ltd. [10] Korea Hydro & Nuclear Power Co., Ltd. [10]
Name of Principal obligor KAS INVESTMENT I LLC [10] KAS INVESTMENT I LLC [10] KAS INVESTMENT I LLC [10] KAS INVESTMENT I LLC [10]
Amount of guarantees | $ $ 9,770 [10]      
Name of Guarantee WOORI AMERICA BANK [10] WOORI AMERICA BANK [10] WOORI AMERICA BANK [10] WOORI AMERICA BANK [10]
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       ₩ 152,366
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       ₩ 1,649
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       ₩ 1,452
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       ₩ 262
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       ₩ 1,700
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       ₩ 1,432
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       ₩ 41
Name of Guarantee IBK and others IBK and others IBK and others IBK 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 | $ $ 4,716      
Name of Guarantee PT. Bank KB Bukopin PT. Bank KB Bukopin PT. Bank KB Bukopin PT. Bank KB Bukopin
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       ₩ 87,392
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 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 | $ $ 4,510      
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 [4]
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       ₩ 0
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       ₩ 163
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       ₩ 2,772
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       ₩ 3,133
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       ₩ 8,035
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 [4]
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       ₩ 2,322
Name of Guarantee Nonghyup Bank Nonghyup Bank Nonghyup Bank Nonghyup Bank
Payment Guarantees 5        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor Korea Hydro & Nuclear Power Co., Ltd. [10] Korea Hydro & Nuclear Power Co., Ltd. [10] Korea Hydro & Nuclear Power Co., Ltd. [10] Korea Hydro & Nuclear Power Co., Ltd. [10]
Name of Principal obligor KAS INVESTMENT II LLC [10] KAS INVESTMENT II LLC [10] KAS INVESTMENT II LLC [10] KAS INVESTMENT II LLC [10]
Amount of guarantees | $ $ 9,730 [10]      
Name of Guarantee WOORI AMERICA BANK [10] WOORI AMERICA BANK [10] WOORI AMERICA BANK [10] WOORI AMERICA BANK [10]
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       ₩ 250
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       ₩ 512
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       ₩ 579
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       ₩ 11,302
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       ₩ 1,950
Name of Guarantee Templeton Hana Asset Templeton Hana Asset Templeton Hana Asset Templeton Hana Asset
Guarantees for supplemental funding 21        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 0 [4]
Name of Guarantee Management Co., Ltd. [4] Management Co., Ltd. [4] Management Co., Ltd. [4] Management Co., Ltd. [4]
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       ₩ 27,702
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]        
Amount of guarantees       ₩ 0 [4]
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       ₩ 603
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 [4]
Collateralized money invested 77        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor Korea South-East Power Co., Ltd. [11] Korea South-East Power Co., Ltd. [11] Korea South-East Power Co., Ltd. [11] Korea South-East Power Co., Ltd. [11]
Name of Principal obligor Boim Combined Heat and Power Generation Co., Ltd. [11] Boim Combined Heat and Power Generation Co., Ltd. [11] Boim Combined Heat and Power Generation Co., Ltd. [11] Boim Combined Heat and Power Generation Co., Ltd. [11]
Amount of guarantees       ₩ 0 [11]
Name of Guarantee IBK [11] IBK [11] IBK [11] IBK [11]
Guarantees for supplemental funding and others 1        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 76,800 [4],[12]
Name of Guarantee NH Investment & Securities Co., Ltd. and others [4],[12] NH Investment & Securities Co., Ltd. and others [4],[12] NH Investment & Securities Co., Ltd. and others [4],[12] NH Investment & Securities Co., Ltd. and others [4],[12]
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       ₩ 15,069
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       ₩ 16,936
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 Goseong Green Power Co., Ltd. Goseong Green Power Co., Ltd. Goseong Green Power Co., Ltd. Goseong Green Power Co., Ltd.
Amount of guarantees       ₩ 284,543
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 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 Gangneung Eco Power Co., Ltd. Gangneung Eco Power Co., Ltd. Gangneung Eco Power Co., Ltd. Gangneung Eco Power Co., Ltd.
Amount of guarantees       ₩ 241,814
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 PND Solar Co., Ltd. PND Solar Co., Ltd. PND Solar Co., Ltd. PND Solar Co., Ltd.
Amount of guarantees       ₩ 1,736
Name of Guarantee IBK IBK IBK IBK
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 Hyundai Eco Energy Co., Ltd. Hyundai Eco Energy Co., Ltd. Hyundai Eco Energy Co., Ltd. Hyundai Eco Energy Co., Ltd.
Amount of guarantees       ₩ 8,493
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 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 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       ₩ 2,045
Name of Guarantee IBK IBK IBK IBK
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 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       ₩ 2,590
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 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 Yeongam Solar Power Co., Ltd. Yeongam Solar Power Co., Ltd. Yeongam Solar Power Co., Ltd. Yeongam Solar Power Co., Ltd.
Amount of guarantees       ₩ 11,828
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin Bank 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 Samsu Wind Power Co., Ltd. Samsu Wind Power Co., Ltd. Samsu Wind Power Co., Ltd. Samsu Wind Power Co., Ltd.
Amount of guarantees       ₩ 2,851
Name of Guarantee Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others Shinhan 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 Saemangeum Heemang Photovoltaic Co., Ltd. Saemangeum Heemang Photovoltaic Co., Ltd. Saemangeum Heemang Photovoltaic Co., Ltd. Saemangeum Heemang Photovoltaic Co., Ltd.
Amount of guarantees       ₩ 16,137
Name of Guarantee Woori Bank and others Woori Bank and others Woori Bank and others Woori 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 Nepal Water & Energy Development Company Private Limited Nepal Water & Energy Development Company Private Limited Nepal Water & Energy Development Company Private Limited Nepal Water & Energy Development Company Private Limited
Amount of guarantees | $ $ 97,105      
Name of Guarantee International Finance International Finance International Finance International Finance
Collateralized money invested 90        
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
Business reserve payment guarantee        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees | $ $ 33,333      
Name of Guarantee Corporation and others Corporation and others Corporation and others Corporation and others
Debt Guarantees 6 [Member]        
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 Energi Prasarana PT. Cirebon Energi Prasarana PT. Cirebon Energi Prasarana PT. Cirebon Energi Prasarana
Amount of guarantees | $ $ 9,290      
Name of Guarantee Mizuho Bank Mizuho Bank Mizuho Bank Mizuho Bank
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 Busan Green Energy Co., Ltd. Busan Green Energy Co., Ltd. Busan Green Energy Co., Ltd. Busan Green Energy Co., Ltd.
Amount of guarantees       ₩ 2,334
Name of Guarantee Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others Shinhan 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 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       ₩ 5,301
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others
Guarantees for Supplemental Funding 24        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees       ₩ 0 [4]
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 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       ₩ 4,316
Name of Guarantee Woori Bank and others Woori Bank and others Woori Bank and others Woori 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 Gwangyang Green Energy Co., Ltd. Gwangyang Green Energy Co., Ltd. Gwangyang Green Energy Co., Ltd. Gwangyang Green Energy Co., Ltd.
Amount of guarantees       ₩ 24,217
Name of Guarantee Shinhan Bank and others Shinhan Bank and others Shinhan Bank and others Shinhan 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 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       ₩ 9,306
Name of Guarantee Hana Bank and others Hana Bank and others Hana Bank and others Hana 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 Chuncheon Green Energy Co., Ltd. Chuncheon Green Energy Co., Ltd. Chuncheon Green Energy Co., Ltd. Chuncheon Green Energy Co., Ltd.
Amount of guarantees       ₩ 17,672
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 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       ₩ 8,643
Name of Guarantee Kookmin Bank and others Kookmin Bank and others Kookmin Bank and others Kookmin 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 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       ₩ 7,908
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 Songsan Green Energy Co., Ltd. Songsan Green Energy Co., Ltd. Songsan Green Energy Co., Ltd. Songsan Green Energy Co., Ltd.
Amount of guarantees       ₩ 7,908
Name of Guarantee Hana Bank Hana Bank Hana Bank Hana Bank
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 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       ₩ 7,658
Name of Guarantee Hana Bank Hana Bank Hana Bank Hana Bank
Collateralized Money Invested 101        
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 Imha Floating Photovoltaic Power Plant Inc. Imha Floating Photovoltaic Power Plant Inc. Imha Floating Photovoltaic Power Plant Inc. Imha Floating Photovoltaic Power Plant Inc.
Amount of guarantees       ₩ 6,351
Name of Guarantee Hana Bank Hana Bank Hana Bank Hana Bank
Certification of payment on L/C        
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 | $ $ 42,750      
Name of Guarantee SMBC Singapore and others SMBC Singapore and others SMBC Singapore and others SMBC Singapore and others
Certification of payment on LC 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 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 | $ $ 9,800      
Name of Guarantee Hana Bank Hana Bank Hana Bank Hana Bank
Certification of payment on LC 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 Amman Asia Electric Power Company Amman Asia Electric Power Company Amman Asia Electric Power Company Amman Asia Electric Power Company
Amount of guarantees | $ $ 15,600      
Name of Guarantee ING Bank [3] ING Bank [3] ING Bank [3] ING Bank [3]
Impounding bonus guarantees 1        
Disclosure of Guarantees provided between the related parties [Line Items]        
Amount of guarantees | $ $ 5,000 [13]      
Name of Guarantee SK Eco Plant Co., Ltd. [13] SK Eco Plant Co., Ltd. [13] SK Eco Plant Co., Ltd. [13] SK Eco Plant Co., Ltd. [13]
Loan payment guarantee 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 EDFR KOWEPO AJBAN HOLDING LIMITED EDFR KOWEPO AJBAN HOLDING LIMITED EDFR KOWEPO AJBAN HOLDING LIMITED EDFR KOWEPO AJBAN HOLDING LIMITED
Amount of guarantees | $ $ 57,090      
Name of Guarantee FAB FAB FAB FAB
Loan payment guarantee 3        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor Korea East-West Power Co., Ltd. [14] Korea East-West Power Co., Ltd. [14] Korea East-West Power Co., Ltd. [14] Korea East-West Power Co., Ltd. [14]
Name of Principal obligor Amaala Sustaninable Company for Energy LLC [14] Amaala Sustaninable Company for Energy LLC [14] Amaala Sustaninable Company for Energy LLC [14] Amaala Sustaninable Company for Energy LLC [14]
Amount of guarantees | $ $ 38,054 [14]      
Name of Guarantee FAB [14] FAB [14] FAB [14] FAB [14]
Debt guarantees 7        
Disclosure of Guarantees provided between the related parties [Line Items]        
Name of Primary guarantor Korea South-East Power Co., Ltd. [15] Korea South-East Power Co., Ltd. [15] Korea South-East Power Co., Ltd. [15] Korea South-East Power Co., Ltd. [15]
Name of Principal obligor Santiago Solar Power SpA [15] Santiago Solar Power SpA [15] Santiago Solar Power SpA [15] Santiago Solar Power SpA [15]
Amount of guarantees | $ $ 8,000 [15]      
Name of Guarantee Nonghyup Bank and others [15] Nonghyup Bank and others [15] Nonghyup Bank and others [15] Nonghyup Bank and others [15]
[1] The credit limits of guarantees to RE Holiday Holdings LLC include the credit limits of guarantees to their subsidiaries.
[2] The payment guarantee related to the gas combined cycle power project of South Jamaica Power Company Limited, a joint venture of the Company.
[3] 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. As of December 31, 2024, the book value of the securities is ￦50,721 million.
[4] The Company guarantees to provide supplemental funding for business with respect to excessive business expenses or insufficient repayment of borrowings.
[5] The common stocks of Dongducheon Dream Power Co., Ltd. held by the Company were pledged as collateral.
[6] The Company provided a payment guarantee to Chile Kelar project for opening L/C for Debt Service Reserve Account (DSRA), and others.
[7] The Company provided a payment guarantee to Jordan Tafila wind power project for opening L/C for Debt Service Reserve Account (DSRA).
[8] The Company has entered into an agreement prescribing the settlement of the estimated loss in case damages occur related to the fulfillment of the mandatory supply volume according to the mandatory supply agreement for coal ash.
[9] Samcheok Eco Materials Co., Ltd., a joint venture 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, 2024, derivative liabilities of ￦26,422 million were recognized in relation to this obligation.
[10] The credit limits of guarantees to KAS INVESTMENT I LLC, KAS INVESTMENT II LLC include the credit limits of guarantees to their subsidiaries.
[11] The Company recognized an impairment loss on all of the equity securities of Boim Combined Heat and Power Generation Co., Ltd. before the prior year, and the acquisition cost of the securities provided as collateral is ￦47,067 million.
[12] Pursuant to the guarantee agreement, the Company recognized other provisions of ￦11,804 million as the possibility of economic benefit outflow to fulfill the obligation was deemed probable and the amount could be reasonably estimated.
[13] 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-Namnoy 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 thousand
[14] The Company provided an EBL payment and EBL hedging guarantee to Amaala Sustainable Company for Energy LLC, an associate of the Company.
[15] The Company has issued a guaranteed letter of credit in the amount of USD 8,000 thousand under the interlender loan agreement with Santiago Solar Power SpA.