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Contingencies and Commitments - Summary of Blank Check And Assets Provided As Collaterals Or Pledges To Financial Institutions By The Company Explanatory (Details) - 12 months ended Dec. 31, 2021
JD in Thousands, $ in Thousands, ₩ in Millions
USD ($)
KRW (₩)
JOD (JD)
Property, plant and equipment and others      
Disclsoure of assets pledged as collateral [Line Items]      
Name of Guarantor Mira Power Limited    
Name of Guarantee International Finance Corporation and others    
Value of collateral | $ $ 275,600    
Description of assets pledged as collateral description [1] Collateral for borrowings    
Property, plant and equipment and others      
Disclsoure of assets pledged as collateral [Line Items]      
Name of Guarantor Tamra Offshore Wind Power Co., Ltd.    
Name of Guarantee Kyobo Life Insurance Co., Ltd. and others    
Value of collateral   ₩ 171,600  
Description of assets pledged as collateral description [2] Collateral for borrowings    
Property, plant and equipment and others      
Disclsoure of assets pledged as collateral [Line Items]      
Name of Guarantor Commerce and Industry Energy Co., Ltd.    
Name of Guarantee IBK and others    
Value of collateral   110,500  
Description of assets pledged as collateral description [2] Collateral for borrowings    
Cash and Cash Equivalents      
Disclsoure of assets pledged as collateral [Line Items]      
Name of Guarantor Gyeonggi Green Energy Co., Ltd.    
Name of Guarantee Korea Development Bank and others    
Value of collateral   327,080  
Description of assets pledged as collateral description [2] Collateral for borrowings    
Cash and cash equivalents      
Disclsoure of assets pledged as collateral [Line Items]      
Name of Guarantor KOSPO Youngnam Power Co., Ltd.    
Name of Guarantee Shinhan Bank and others    
Value of collateral   396,120  
Description of assets pledged as collateral description [2] Collateral for borrowings    
Cash and cash equivalents      
Disclsoure of assets pledged as collateral [Line Items]      
Name of Guarantor Incheon Fuel Cell Co., Ltd.    
Name of Guarantee Kookmin Bank and others    
Value of collateral   276,960  
Description of assets pledged as collateral description [2] Collateral for borrowings    
Property, plant and equipment and others      
Disclsoure of assets pledged as collateral [Line Items]      
Name of Guarantor Gyeongju Wind Power Co., Ltd.    
Name of Guarantee Shinhan Bank and others    
Value of collateral   68,400  
Description of assets pledged as collateral description [2] Collateral for borrowings    
Property, plant and equipment and others      
Disclsoure of assets pledged as collateral [Line Items]      
Name of Guarantor Korea Offshore Wind Power Co., Ltd.    
Name of Guarantee Woori Bank and others    
Value of collateral   293,400  
Description of assets pledged as collateral description [2] Collateral for borrowings    
Finance Lease receivable and property, plant and equipment and others      
Disclsoure of assets pledged as collateral [Line Items]      
Name of Guarantor Qatrana Electric Power Company    
Name of Guarantee The Islamic Development Bank and others    
Value of collateral | JD     JD 236,570
Description of assets pledged as collateral description [1] Collateral for borrowings    
Finance Lease receivable and property, plant and equipment and others      
Disclsoure of assets pledged as collateral [Line Items]      
Name of Guarantor KST Electric Power Company, S.A.P.I. de C.V.    
Name of Guarantee The Export—Import Bank of Korea and others    
Value of collateral | $ $ 401,277    
Description of assets pledged as collateral description [1] Collateral for debt securities    
Cash and Cash Equivalents      
Disclsoure of assets pledged as collateral [Line Items]      
Name of Guarantor Jeongam Wind Power Co., Ltd.    
Name of Guarantee KDB Capital Corporation and others    
Value of collateral   221,631  
Description of assets pledged as collateral description [2] Collateral for borrowings    
Property, plant and equipment and others      
Disclsoure of assets pledged as collateral [Line Items]      
Name of Guarantor TS Energy No. 25 Co., Ltd.    
Name of Guarantee Kyobo Life Insurance Co., Ltd. and others    
Value of collateral   ₩ 521,281  
Description of assets pledged as collateral description [2] Collateral for borrowings    
[1] Based on the credit limits of the respective loans.
[2] As of December 31, 2021, the Company has established guarantees for pledge for transfer of rights of long-term borrowings, pledge for insurance claims, pledge for shares, etc.