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Borrowings and Debt Securities - Long-term Borrowings (Details)
€ in Thousands, ¥ in Thousands, JD in Thousands, $ in Thousands, ₩ in Millions
 12 Months Ended
Dec. 31, 2022
KRW (₩)
Dec. 31, 2021
KRW (₩)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
JOD (JD)
Dec. 31, 2022
JPY (¥)
Dec. 31, 2022
EUR (€)
Dec. 31, 2022
AUD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2021
JOD (JD)
Dec. 31, 2021
JPY (¥)
Dec. 31, 2021
EUR (€)
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings ₩ 6,615,470 ₩ 3,742,184                  
Less : Discount on long-term borrowings (15,719) (14,905)                  
Less : Current portion of long-term borrowings (3,638,202) (1,463,703)                  
Add : Current portion of discount on long-term borrowings 774 2,048                  
Long-term borrowings 2,962,323 2,265,624                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings ₩ 4,981,208 ₩ 2,720,355                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Korea Development Bank Korea Development Bank                  
Purpose of borrowings Others Others                  
Borrowings, interest rate 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50%
Borrowings ₩ 2,133 ₩ 2,509                  
Local long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, maturity 2023 2023                  
Local long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, maturity 2044 2044                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Korea Development Bank Korea Development Bank                  
Purpose of borrowings Facility Facility                  
Borrowings ₩ 28,420 ₩ 39,430                  
Local long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate 2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%
Borrowings, maturity 2023 2022                  
Local long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate 4.60% 4.60% 4.60% 4.60% 4.60% 4.60% 4.60% 4.60% 4.60% 4.60% 4.60%
Borrowings, maturity 2028 2028                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Korea Development Bank Korea Development Bank                  
Purpose of borrowings Facility Operating funds                  
Borrowings, interest rate   2.33%           2.33% 2.33% 2.33% 2.33%
Borrowings, interest rate basis CB rate+0.90                    
Borrowings, maturity 2029 2022                  
Borrowings ₩ 9,985 ₩ 20,000                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Korea Development Bank Korea Development Bank                  
Purpose of borrowings Operating funds Operating funds                  
Borrowings, interest rate basis 1yr KDB rate+0.81~0.91 1yr KDB bond rate + 0.81~0.95                  
Borrowings ₩ 54,300 ₩ 64,300                  
Local long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis 0.81% 0.81% 0.81% 0.81% 0.81% 0.81% 0.81% 0.81% 0.81% 0.81% 0.81%
Borrowings, maturity 2023 2022                  
Local long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis 0.91% 0.95% 0.91% 0.91% 0.91% 0.91% 0.91% 0.95% 0.95% 0.95% 0.95%
Borrowings, maturity 2024 2023                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Hana Bank and others Hana Bank                  
Purpose of borrowings Commercial Paper Commercial Paper                  
Borrowings, interest rate basis 3M CD+0.13~1.20 3M CD+0.13~0.43                  
Borrowings ₩ 3,250,000 ₩ 1,050,000                  
Local long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis 0.13% 0.13% 0.13% 0.13% 0.13% 0.13% 0.13% 0.13% 0.13% 0.13% 0.13%
Borrowings, maturity 2023 2022                  
Local long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis 1.20% 0.43% 1.20% 1.20% 1.20% 1.20% 1.20% 0.43% 0.43% 0.43% 0.43%
Borrowings, maturity 2027 2025                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Hana Bank and others Hana Bank                  
Purpose of borrowings Facility Facility                  
Borrowings, interest rate 4.60% 4.60% 4.60% 4.60% 4.60% 4.60% 4.60% 4.60% 4.60% 4.60% 4.60%
Borrowings, maturity 2028 2028                  
Borrowings ₩ 8,137 ₩ 9,647                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Hana Bank and others Hana Bank                  
Purpose of borrowings Facility Facility                  
Borrowings, interest rate basis 3yr KTB rate-1.50 3yr KTB rate-1.25                  
Borrowings, maturity 2028                    
Borrowings ₩ 3,821 ₩ 4,485                  
Local long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, maturity   2022                  
Local long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, maturity   2028                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Export-Import Bank of Korea IBK                  
Purpose of borrowings Project loans PF Refinancing                  
Borrowings, interest rate 1.50%   1.50% 1.50% 1.50% 1.50% 1.50%        
Borrowings, interest rate basis   CD+1.25                  
Borrowings, maturity 2026 2030                  
Borrowings ₩ 10,312 ₩ 8,589                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Export-Import Bank of Korea Export-Import Bank of Korea                  
Purpose of borrowings Facility Project loans                  
Borrowings, interest rate 1.32% 1.50% 1.32% 1.32% 1.32% 1.32% 1.32% 1.50% 1.50% 1.50% 1.50%
Borrowings, maturity 2028 2026                  
Borrowings ₩ 58,100 ₩ 13,258                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Export-Import Bank of Korea Export-Import Bank of Korea                  
Purpose of borrowings Operating funds Facility                  
Borrowings, interest rate 1.78% 1.32% 1.78% 1.78% 1.78% 1.78% 1.78% 1.32% 1.32% 1.32% 1.32%
Borrowings, maturity 2023 2028                  
Borrowings ₩ 15,700 ₩ 32,000                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Korea Energy Agency Export-Import Bank of Korea                  
Purpose of borrowings Development of power resources Operating funds                  
Borrowings, interest rate   1.78%           1.78% 1.78% 1.78% 1.78%
Borrowings, interest rate basis 3yr KTB rate-2.25 1.50~1.75                    
Borrowings, maturity   2023                  
Borrowings ₩ 11,175 ₩ 15,700                  
Local long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, maturity 2023                    
Local long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, maturity 2028                    
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Korea Energy Agency Korea Energy Agency                  
Purpose of borrowings Facility Development of power resources                  
Borrowings, interest rate basis 3yr KTB rate-2.50 3yr KTB rate-2.25                  
Borrowings ₩ 393 ₩ 8,971                  
Local long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, maturity 2023 2023                  
Local long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, maturity 2024 2025                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Korea Energy Agency Korea Energy Agency                  
Purpose of borrowings Project loans Facility                  
Borrowings, interest rate basis — 3yr KTB rate-2.25                  
Borrowings ₩ 1,197 ₩ 995                  
Local long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, maturity 2023 2022                  
Local long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, maturity 2027 2024                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Shinhan Bank and others Korea Energy Agency                  
Purpose of borrowings Facility Project loans                  
Borrowings, interest rate basis CB rate+0.90~1.10 —                  
Borrowings, maturity   2023                  
Borrowings ₩ 19,195 ₩ 1,197                  
Local long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis 0.90%   0.90% 0.90% 0.90% 0.90% 0.90%        
Borrowings, maturity 2028                    
Local long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis 1.10%   1.10% 1.10% 1.10% 1.10% 1.10%        
Borrowings, maturity 2029                    
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Shinhan Bank and others Korea Energy Agency                  
Purpose of borrowings Commercial Paper Others                  
Borrowings, interest rate   1.75%           1.75% 1.75% 1.75% 1.75%
Borrowings, interest rate basis 3M CD+0.38                    
Borrowings, maturity 2025 2028                  
Borrowings ₩ 150,000 ₩ 4,893                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Shinhan Bank and others Shinhan Bank and others                  
Purpose of borrowings Others Facility                  
Borrowings, interest rate 3.95%   3.95% 3.95% 3.95% 3.95% 3.95%        
Borrowings, interest rate basis   CB rate+1.10                  
Borrowings, maturity 2034 2028                  
Borrowings ₩ 78,905 ₩ 14,470                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Shinhan Bank and others Shinhan Bank and others                  
Purpose of borrowings Others Commercial Paper                  
Borrowings, interest rate basis Standard overdraft rate+1.00 3M CD+0.38                  
Borrowings, maturity 2034 2025                  
Borrowings ₩ 78,905 ₩ 150,000                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Kookmin Bank Shinhan Bank and others                  
Purpose of borrowings Facility Others                  
Borrowings, interest rate   3.95%           3.95% 3.95% 3.95% 3.95%
Borrowings, interest rate basis MOR+0.79 3M CD+1.79 5.04                    
Borrowings, maturity   2034                  
Borrowings ₩ 105,155 ₩ 84,179                  
Local long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, maturity 2023                    
Local long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, maturity 2035                    
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Woori Bank Shinhan Bank and others                  
Purpose of borrowings Others Others                  
Borrowings, interest rate 4.00%   4.00% 4.00% 4.00% 4.00% 4.00%        
Borrowings, interest rate basis   Standard overdraft rate+1.00                  
Borrowings, maturity 2025 2034                  
Borrowings ₩ 20,700 ₩ 84,179                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Woori Bank Kookmin Bank                  
Purpose of borrowings Facility Facility                  
Borrowings, interest rate 5.04%   5.04% 5.04% 5.04% 5.04% 5.04%        
Borrowings, interest rate basis 3M Libor+1.90 5.04 MOR+0.79 3M CD+1.79                  
Borrowings, adjustment to interest rate basis 1.90%   1.90% 1.90% 1.90% 1.90% 1.90%        
Borrowings ₩ 48,823 ₩ 59,333                  
Local long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis   0.79%           0.79% 0.79% 0.79% 0.79%
Borrowings, maturity 2035 2022                  
Local long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis   1.79%           1.79% 1.79% 1.79% 1.79%
Borrowings, maturity 2042 2031                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Others Others                  
Purpose of borrowings Facility Facility                  
Borrowings ₩ 690,259 ₩ 620,185                  
Local long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate 3.50% 2.80% 3.50% 3.50% 3.50% 3.50% 3.50% 2.80% 2.80% 2.80% 2.80%
Borrowings, maturity 2028 2024                  
Local long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate 6.80% 6.80% 6.80% 6.80% 6.80% 6.80% 6.80% 6.80% 6.80% 6.80% 6.80%
Borrowings, maturity 2044 2039                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Others Others                  
Purpose of borrowings Facility Facility                  
Borrowings, interest rate   3.37%           3.37% 3.37% 3.37% 3.37%
Borrowings, interest rate basis CB rate+1.10 1.75~4.56 CB rate+0.90~1.10 3M CD+1.60 3.37                  
Borrowings, adjustment to interest rate basis 1.10% 1.60% 1.10% 1.10% 1.10% 1.10% 1.10% 1.60% 1.60% 1.60% 1.60%
Borrowings ₩ 103,131 ₩ 171,733                  
Local long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate 1.75%   1.75% 1.75% 1.75% 1.75% 1.75%        
Borrowings, adjustment to interest rate basis   0.90%           0.90% 0.90% 0.90% 0.90%
Borrowings, maturity 2024 2028                  
Local long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate 4.56%   4.56% 4.56% 4.56% 4.56% 4.56%        
Borrowings, adjustment to interest rate basis   1.10%           1.10% 1.10% 1.10% 1.10%
Borrowings, maturity 2036 2037                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Others Others                  
Purpose of borrowings PF Refinancing PF Refinancing                  
Borrowings, interest rate basis CB rate+1.25                    
Borrowings, maturity 2030                    
Borrowings ₩ 7,634 ₩ 71,742                  
Local long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate   3.80%           3.80% 3.80% 3.80% 3.80%
Borrowings, maturity   2030                  
Local long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate   5.00%           5.00% 5.00% 5.00% 5.00%
Borrowings, maturity   2034                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Others Others                  
Purpose of borrowings PF Refinancing PF Refinancing                  
Borrowings, interest rate 4.10% 1.75% 4.10% 4.10% 4.10% 4.10% 4.10% 1.75% 1.75% 1.75% 1.75%
Borrowings, maturity 2030 2029                  
Borrowings ₩ 21,206 ₩ 22,265                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Others Others                  
Purpose of borrowings Securitized debts (*) Others                  
Borrowings, interest rate basis 3M CD+1.80                    
Borrowings, maturity 2025                    
Borrowings ₩ 33,476 ₩ 116,367                  
Local long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate   4.40%           4.40% 4.40% 4.40% 4.40%
Borrowings, maturity   2022                  
Local long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate   7.90%           7.90% 7.90% 7.90% 7.90%
Borrowings, maturity   2038                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Others Others                  
Purpose of borrowings Others Others                  
Borrowings ₩ 120,217 ₩ 49,928                  
Local long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate 4.40% 1.80% 4.40% 4.40% 4.40% 4.40% 4.40% 1.80% 1.80% 1.80% 1.80%
Borrowings, maturity 2023 2031                  
Local long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate 7.90% 4.50% 7.90% 7.90% 7.90% 7.90% 7.90% 4.50% 4.50% 4.50% 4.50%
Borrowings, maturity 2039 2034                  
Local long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Others                    
Purpose of borrowings Others                    
Borrowings ₩ 49,929                    
Local long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate 1.80%   1.80% 1.80% 1.80% 1.80% 1.80%        
Borrowings, maturity 2031                    
Local long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate 4.50%   4.50% 4.50% 4.50% 4.50% 4.50%        
Borrowings, maturity 2034                    
Foreign long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings ₩ 1,634,262 ₩ 1,021,829                  
Foreign long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Korea Energy Agency Korea Energy Agency                  
Purpose of borrowings Project loans Project loans                  
Borrowings, interest rate basis — —                  
Borrowings, maturity 2026 2026                  
Borrowings ₩ 11,081 ₩ 10,366 $ 8,744,000         $ 8,744,000      
Foreign long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Export-Import Bank of Korea and others Export-Import Bank of Korea and others                  
Purpose of borrowings Direct Loan and others Direct loan and others                  
Borrowings, interest rate basis 6M Libor+3.20 1M Libor+1.80~3.20                  
Borrowings, maturity 2036 2036                  
Borrowings ₩ 98,969 ₩ 106,485 $ 78,094.000         $ 89,823,000      
Foreign long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis   1.80%           1.80% 1.80% 1.80% 1.80%
Foreign long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis   3.20%           3.20% 3.20% 3.20% 3.20%
Foreign long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Export-Import Bank of Korea and others Export-Import Bank of Korea and others                  
Purpose of borrowings Direct Loan and others Direct loan and others                  
Borrowings, interest rate basis 3M Libor+2.25~3.70 3M Libor+2.75~3.70                  
Borrowings, maturity 2027 2027                  
Borrowings ₩ 162,692 ₩ 180,363   JD 91,051         JD 107,868    
Foreign long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis 2.25% 2.75% 2.25% 2.25% 2.25% 2.25% 2.25% 2.75% 2.75% 2.75% 2.75%
Foreign long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis 3.70% 3.70% 3.70% 3.70% 3.70% 3.70% 3.70% 3.70% 3.70% 3.70% 3.70%
Foreign long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Export-Import Bank of Korea and others Export-Import Bank of Korea and others                  
Purpose of borrowings Facility PF Loan                  
Borrowings, interest rate basis 6M Libor+1.70~2.50 SOFR(3M) +1.83 6M Libor+1.70~2.50                  
Borrowings, maturity   2032                  
Borrowings ₩ 167,496 ₩ 122,509 $ 132,168,000         $ 103,340,000      
Foreign long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis 1.70% 1.70% 1.70% 1.70% 1.70% 1.70% 1.70% 1.70% 1.70% 1.70% 1.70%
Borrowings, maturity 2032                    
Foreign long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis 2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50% 2.50%
Borrowings, maturity 2039                    
Foreign long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Kookmin Bank and others POSCO and others                  
Purpose of borrowings EBL Shareholder’s loan                  
Borrowings, interest rate   8.00%           8.00% 8.00% 8.00% 8.00%
Borrowings, interest rate basis SOFR(1M)+0.11~0.75                    
Borrowings, maturity 2024 2025                  
Borrowings ₩ 189,578 ₩ 14,171 $ 149,592,000         $ 11,953,000      
Foreign long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis 0.11%   0.11% 0.11% 0.11% 0.11% 0.11%        
Foreign long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis 0.75%   0.75% 0.75% 0.75% 0.75% 0.75%        
Foreign long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Riyad Bank Samsung Life Insurance and others                  
Purpose of borrowings EBL Shareholder’s loan                  
Borrowings, interest rate   8.00%           8.00% 8.00% 8.00% 8.00%
Borrowings, interest rate basis SOFR(3M)+1.20                    
Borrowings, maturity 2025 2031                  
Borrowings ₩ 63,201 ₩ 8,114 $ 49,870,000           JD 4,853    
Foreign long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor POSCO and others Samsung Life Insurance and others                  
Purpose of borrowings Shareholder’s loan Syndicated Loan                  
Borrowings, interest rate 8.00%   8.00% 8.00% 8.00% 8.00% 8.00%        
Borrowings, maturity 2025 2032                  
Borrowings ₩ 12,680 ₩ 53,000 $ 10,005,000             ¥ 5,144,387  
Foreign long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate   3.10%           3.10% 3.10% 3.10% 3.10%
Foreign long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate   8.00%           8.00% 8.00% 8.00% 8.00%
Foreign long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor POSCO and others Woori Bank and others                  
Purpose of borrowings Shareholder’s loan Syndicated Loan                  
Borrowings, interest rate 8.00%   8.00% 8.00% 8.00% 8.00% 8.00%        
Borrowings, interest rate basis   JPY 6M Libor+2.00                  
Borrowings, maturity 2031 2032                  
Borrowings ₩ 8,671 ₩ 29,060   JD 4,853           ¥ 2,820,708  
Foreign long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Samsung Life Insurance and others KiwoomSolar Power Professional Investor Private Placement Investment Trust V                  
Purpose of borrowings Syndicated Loan Senior borrowing                  
Borrowings, interest rate   3.90%           3.90% 3.90% 3.90% 3.90%
Borrowings, maturity 2032 2029                  
Borrowings ₩ 45,304 ₩ 48,741     ¥ 4,752,934           € 36,311
Foreign long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate 3.10%   3.10% 3.10% 3.10% 3.10% 3.10%        
Foreign long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate 8.00%   8.00% 8.00% 8.00% 8.00% 8.00%        
Foreign long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Woori Bank and others IFC and others                  
Purpose of borrowings Syndicated Loan Others                  
Borrowings, interest rate basis JPY 6M Libor+1.84 6M Libor+5.00                  
Borrowings, maturity 2032 2031                  
Borrowings ₩ 24,910 ₩ 272,686     ¥ 2,613,385     $ 230,018,000      
Foreign long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Solar Construction Lendings, LLC Federal Financing Bank and others                  
Purpose of borrowings Facility PF Loan                  
Borrowings, interest rate 5.00%   5.00% 5.00% 5.00% 5.00% 5.00%        
Borrowings, maturity 2025                    
Borrowings ₩ 39,464 ₩ 111,597 $ 31,140,000         $ 94,135,000      
Foreign long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate   2.39%           2.39% 2.39% 2.39% 2.39%
Borrowings, maturity   2031                  
Foreign long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate   6.00%           6.00% 6.00% 6.00% 6.00%
Borrowings, maturity   2038                  
Foreign long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor   Others                  
Purpose of borrowings Senior borrowing Others                  
Borrowings, interest rate basis 3.90 —                  
Borrowings, maturity 2029                    
Borrowings ₩ 54,765 ₩ 64,737       € 40,531   $ 54,607,000      
Foreign long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, maturity 2028                    
Foreign long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Purpose of borrowings Others                    
Borrowings, interest rate basis 6M Libor+5.00 SOFR(3M)+1.83~1.99 5.41~6.19                    
Borrowings ₩ 517,575   $ 408,408,000                
Foreign long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate 5.41%   5.41% 5.41% 5.41% 5.41% 5.41%        
Borrowings, adjustment to interest rate basis 1.83%   1.83% 1.83% 1.83% 1.83% 1.83%        
Foreign long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, interest rate 6.19%   6.19% 6.19% 6.19% 6.19% 6.19%        
Borrowings, adjustment to interest rate basis 1.99%   1.99% 1.99% 1.99% 1.99% 1.99%        
Borrowings, maturity 2031                    
Foreign long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Hanwha US Solar Private Fund and others                    
Purpose of borrowings PF Refinancing                    
Borrowings, adjustment to interest rate basis 3.00%   3.00% 3.00% 3.00% 3.00% 3.00%        
Borrowings, maturity 2038                    
Borrowings ₩ 73,894   $ 58,308,000                
Foreign long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor DBS Bank and others                    
Purpose of borrowings Facility                    
Borrowings, interest rate basis 1M BBSY+1.40~2.25                    
Borrowings, maturity 2025                    
Borrowings ₩ 163,836           $ 190,860        
Foreign long-term borrowings | Minimum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis 1.40%   1.40% 1.40% 1.40% 1.40% 1.40%        
Foreign long-term borrowings | Maximum                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Borrowings, adjustment to interest rate basis 2.25%   2.25% 2.25% 2.25% 2.25% 2.25%        
Foreign long-term borrowings                      
Disclosure of detailed information about Long-term borrowings [Line Items]                      
Name of Creditor Others                    
Purpose of borrowings Others                    
Borrowings, interest rate basis —                    
Borrowings, maturity —                    
Borrowings ₩ 146   $ 116,000