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Borrowings and Debt Securities - Long-term Borrowings (Details) € in Millions, ₩ in Millions, ¥ in Millions, JD in Millions, $ in Millions, $ in Millions | 12 Months Ended |  |
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Dec. 31, 2023 KRW (₩) | Dec. 31, 2022 KRW (₩) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 JOD (JD) | Dec. 31, 2023 JPY (¥) | Dec. 31, 2023 EUR (€) | Dec. 31, 2023 AUD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2022 JOD (JD) | Dec. 31, 2022 JPY (¥) | Dec. 31, 2022 EUR (€) | Dec. 31, 2022 AUD ($)
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 9,188,152 | ₩ 6,615,470 |  |  |  |  |  |  |  |  |  |
Less: Discount on long-term borrowings | (15,835) | (15,719) |  |  |  |  |  |  |  |  |  |
Less: Current portion of long-term borrowings | (5,780,638) | (3,638,202) |  |  |  |  |  |  |  |  |  |
Add: Current portion of discount on long-term borrowings | 1,152 | 774 |  |  |  |  |  |  |  |  |  |
Long-term borrowings | 3,392,831 | 2,962,323 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 7,304,875 | ₩ 4,981,208 |  |  |  |  |  |  |  |  |  |
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% | 0.50%
Borrowings | ₩ 1,758 | ₩ 2,133 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2024 | 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 | ₩ 53,052 | ₩ 28,420 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 2.60% | 2.50% | 2.60% | 2.60% | 2.60% | 2.60% | 2.60% | 2.50% | 2.50% | 2.50% | 2.50% | 2.50%
Borrowings, maturity | 2025 | 2023 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 4.94% | 4.60% | 4.94% | 4.94% | 4.94% | 4.94% | 4.94% | 4.60% | 4.60% | 4.60% | 4.60% | 4.60%
Borrowings, maturity | 2042 | 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 | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | CB rate+0.90 | CB rate+0.90 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2029 | 2029 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 9,985 | ₩ 9,985 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Korea Development Bank |  |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Operating funds | Operating funds |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | 1yr KDB rate+0.91 | 1yr KDB rate +0.81~0.91 |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 0.91% |  | 0.91% | 0.91% | 0.91% | 0.91% | 0.91% |  |  |  |  |
Borrowings, maturity | 2024 |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 40,000 | ₩ 54,300 |  |  |  |  |  |  |  |  |  |
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%
Borrowings, maturity |  | 2023 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 0.91% |  |  |  |  |  | 0.91% | 0.91% | 0.91% | 0.91% | 0.91%
Borrowings, maturity |  | 2024 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Hana Bank and others | Hana Bank and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Commercial Paper | Commercial Paper |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | 3M CD+0.13~1.20 | 3M CD+0.13~1.20 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 5,350,000 | ₩ 3,250,000 |  |  |  |  |  |  |  |  |  |
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% | 0.13%
Borrowings, maturity | 2024 | 2023 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 1.20% | 1.20% | 1.20% | 1.20% | 1.20% | 1.20% | 1.20% | 1.20% | 1.20% | 1.20% | 1.20% | 1.20%
Borrowings, maturity | 2028 | 2027 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Hana Bank and others | Hana Bank and others |  |  |  |  |  |  |  |  |  |
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% | 4.60%
Borrowings, maturity | 2028 | 2028 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 6,558 | ₩ 8,137 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Hana Bank and others | Hana Bank and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | 3yr KTB rate-2.50 | 3yr KTB rate-1.50 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2028 | 2028 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 3,156 | ₩ 3,821 |  |  |  |  |  |  |  |  |  |
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 | Project loans | Project loans |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 1.00% | 1.50% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 1.50% | 1.50% | 1.50% | 1.50% | 1.50%
Borrowings, maturity | 2026 | 2026 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 7,365 | ₩ 10,312 |  |  |  |  |  |  |  |  |  |
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 | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 1.32% | 1.32% | 1.32% | 1.32% | 1.32% | 1.32% | 1.32% | 1.32% | 1.32% | 1.32% | 1.32% | 1.32%
Borrowings, maturity | 2028 | 2028 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 80,000 | ₩ 58,100 |  |  |  |  |  |  |  |  |  |
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 | Operating funds |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 1.78% |  |  |  |  |  | 1.78% | 1.78% | 1.78% | 1.78% | 1.78%
Borrowings, interest rate basis | 3M Bank debenture rate +0.66 |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2026 | 2023 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 40,000 | ₩ 15,700 |  |  |  |  |  |  |  |  |  |
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 | Development of power resources | Development of power resources |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | 3yr KTB rate-2.25 2.25 | 3yr KTB rate-2.25 1.50~1.75 |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 2.25% |  | 2.25% | 2.25% | 2.25% | 2.25% | 2.25% |  |  |  |  |
Borrowings | ₩ 9,176 | ₩ 11,175 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 1.50% |  |  |  |  |  | 1.50% | 1.50% | 1.50% | 1.50% | 1.50%
Borrowings, maturity | 2024 | 2023 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 1.75% |  |  |  |  |  | 1.75% | 1.75% | 1.75% | 1.75% | 1.75%
Borrowings, maturity | 2028 | 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 | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | 3yr KTB rate-1.50 | 3yr KTB rate-2.50 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2024 |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 163 | ₩ 393 |  |  |  |  |  |  |  |  |  |
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 |  | 2024 |  |  |  |  |  |  |  |  |  |
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 | Project loans |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | 0 | 0 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2033 |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 1,197 | ₩ 1,197 |  |  |  |  |  |  |  |  |  |
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 |  | 2027 |  |  |  |  |  |  |  |  |  |
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 | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | CB rate+0.90~1.10 | CB rate+0.90~1.10 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 16,825 | ₩ 19,195 |  |  |  |  |  |  |  |  |  |
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% | 0.90% | 0.90% | 0.90% | 0.90% | 0.90% | 0.90%
Borrowings, maturity | 2028 | 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% | 1.10% | 1.10% | 1.10% | 1.10% | 1.10% | 1.10%
Borrowings, maturity | 2029 | 2029 |  |  |  |  |  |  |  |  |  |
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 | Operating funds | Commercial Paper |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | 6M Bank debenture rate+0.93 | 3M CD+0.38 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2025 | 2025 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 20,000 | ₩ 150,000 |  |  |  |  |  |  |  |  |  |
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 | Commercial Paper | Others |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 3.95% |  |  |  |  |  | 3.95% | 3.95% | 3.95% | 3.95% | 3.95%
Borrowings, interest rate basis | 3M CD+0.38 |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2025 | 2034 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 150,000 | ₩ 78,905 |  |  |  |  |  |  |  |  |  |
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 | Others |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 3.95% |  | 3.95% | 3.95% | 3.95% | 3.95% | 3.95% |  |  |  |  |
Borrowings, interest rate basis |  | Standard overdraft rate+1.00 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2034 | 2034 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 73,425 | ₩ 78,905 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Shinhan Bank and others | Kookmin Bank |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Others | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | Standard overdraft rate+1.00 | MOR+0.79 3M CD+1.79 5.04 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2034 |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 73,425 | ₩ 105,155 |  |  |  |  |  |  |  |  |  |
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 | Kookmin Bank | Kookmin Bank |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Others |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 5.04% | 4.00% | 5.04% | 5.04% | 5.04% | 5.04% | 5.04% | 4.00% | 4.00% | 4.00% | 4.00% | 4.00%
Borrowings, interest rate basis | 1yr Bank debenture rate +0.78 3M CD+1.79~2.10 5.04 |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity |  | 2025 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 186,032 | ₩ 20,700 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
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% | 1.79% |  |  |  |  |
Borrowings, maturity | 2025 |  |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 2.10% |  | 2.10% | 2.10% | 2.10% | 2.10% | 2.10% |  |  |  |  |
Borrowings, maturity | 2037 |  |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Woori Bank | Woori Bank |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | Standard overdraft rate+1.00 3M CD+1.90 5.04 | 3M Libor+1.90 5.04 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 101,172 | ₩ 48,823 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 1.90% |  |  |  |  |  | 1.90% | 1.90% | 1.90% | 1.90% | 1.90%
Borrowings, maturity | 2034 | 2035 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 5.04% |  |  |  |  |  | 5.04% | 5.04% | 5.04% | 5.04% | 5.04%
Borrowings, maturity | 2042 | 2042 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | IBK | Others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 30,690 | ₩ 690,259 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 4.00% | 3.50% | 4.00% | 4.00% | 4.00% | 4.00% | 4.00% | 3.50% | 3.50% | 3.50% | 3.50% | 3.50%
Borrowings, maturity | 2042 | 2028 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 5.80% | 6.80% | 5.80% | 5.80% | 5.80% | 5.80% | 5.80% | 6.80% | 6.80% | 6.80% | 6.80% | 6.80%
Borrowings, maturity | 2044 | 2044 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Nonghyup Bank | Others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | 3M CD+2.00~2.10 | CB rate+1.10 1.75~4.56 |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 1.10% |  |  |  |  |  | 1.10% | 1.10% | 1.10% | 1.10% | 1.10%
Borrowings | ₩ 22,517 | ₩ 103,131 |  |  |  |  |  |  |  |  |  |
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 | 2.00% |  | 2.00% | 2.00% | 2.00% | 2.00% | 2.00% |  |  |  |  |
Borrowings, maturity | 2030 | 2024 |  |  |  |  |  |  |  |  |  |
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 | 2.10% |  | 2.10% | 2.10% | 2.10% | 2.10% | 2.10% |  |  |  |  |
Borrowings, maturity | 2041 | 2036 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Others | Others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | PF Refinancing |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis |  | CB rate+1.25 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity |  | 2030 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 735,722 | ₩ 7,634 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 3.50% |  | 3.50% | 3.50% | 3.50% | 3.50% | 3.50% |  |  |  |  |
Borrowings, maturity | 2028 |  |  |  |  |  |  |  |  |  |  |
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% |  |  |  |  |
Borrowings, maturity | 2042 |  |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Others | Others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | PF Refinancing |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 4.10% |  |  |  |  |  | 4.10% | 4.10% | 4.10% | 4.10% | 4.10%
Borrowings, interest rate basis | CB rate+1.10 3M CD+2.10 1.75~3.30 |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity |  | 2030 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 51,509 | ₩ 21,206 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2024 |  |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2041 |  |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Others | Others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | PF Refinancing | Securitized debts (*) |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | CB rate+1.25 | 3M CD+1.80 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2030 | 2025 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 6,680 | ₩ 33,476 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Others | Others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | PF Refinancing | Others |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 4.10% |  | 4.10% | 4.10% | 4.10% | 4.10% | 4.10% |  |  |  |  |
Borrowings, maturity | 2030 |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 18,556 | ₩ 120,217 |  |  |  |  |  |  |  |  |  |
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% | 4.40%
Borrowings, maturity |  | 2023 |  |  |  |  |  |  |  |  |  |
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% | 7.90%
Borrowings, maturity |  | 2039 |  |  |  |  |  |  |  |  |  |
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 | ₩ 52,060 | ₩ 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 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Others |  |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Others |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 113,973 |  |  |  |  |  |  |  |  |  |  |
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% | 4.40% |  |  |  |  |
Borrowings, maturity | 2025 |  |  |  |  |  |  |  |  |  |  |
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% | 7.90% |  |  |  |  |
Borrowings, maturity | 2039 |  |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Others |  |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Others |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 49,879 |  |  |  |  |  |  |  |  |  |  |
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 | ₩ 1,883,277 | ₩ 1,634,262 |  |  |  |  |  |  |  |  |  |
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 | 0 | 0 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2026 | 2026 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 11,274 | ₩ 11,081 | $ 8,744 |  |  |  |  | $ 8,744 |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Export-Import Bankof 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 Synthetic Libor+1.80~3.20 | 6M Libor+3.20 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2036 | 2036 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 101,020 | ₩ 98,969 | $ 78,347 |  |  |  |  | 78,094 |  |  |  |
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% | 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% | 3.20% |  |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Export-Import Bankof 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 Synthetic Libor+2.25~3.70 | 3M Libor+2.25~3.70 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2027 | 2027 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 113,390 | ₩ 162,692 |  | JD 62,385 |  |  |  |  | JD 91,051 |  |  |
Foreign long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
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 | 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% |  |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Export-Import Bankof Korea and others | Export-Import Bank of Korea and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | 6M Synthetic Libor+1.70~2.50 SOFR(1M)+1.83 | 6M Libor+1.70~2.50SOFR(1M) +1.83 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 155,909 | ₩ 167,496 | $ 120,916 |  |  |  |  | $ 132,168 |  |  |  |
Foreign long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 1.70% |  |  |  |  |  | 1.70% | 1.70% | 1.70% | 1.70% | 1.70%
Borrowings, adjustment to interest rate basis | 1.70% |  | 1.70% | 1.70% | 1.70% | 1.70% | 1.70% |  |  |  |  |
Borrowings, maturity | 2029 | 2029 |  |  |  |  |  |  |  |  |  |
Foreign long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
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%
Borrowings, adjustment to interest rate basis | 2.50% |  | 2.50% | 2.50% | 2.50% | 2.50% | 2.50% |  |  |  |  |
Borrowings, maturity | 2031 | 2032 |  |  |  |  |  |  |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Korea Development Bank and others | Kookmin Bank and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | EBL | EBL |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | SOFR(1M)+0.86 | SOFR(1M)+0.11~0.75 |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 0.86% |  | 0.86% | 0.86% | 0.86% | 0.86% | 0.86% |  |  |  |  |
Borrowings, maturity | 2025 | 2024 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 183,157 | ₩ 189,578 | $ 142,049 |  |  |  |  | $ 149,592 |  |  |  |
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 | POSCO and others | Riyad Bank |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Shareholder’s loan | EBL |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis |  | SOFR(3M)+1.20 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2025 | 2025 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 13,887 | ₩ 63,201 | $ 10,770 |  |  |  |  | $ 49,870 |  |  |  |
Foreign long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 5.60% |  | 5.60% | 5.60% | 5.60% | 5.60% | 5.60% |  |  |  |  |
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 | POSCO and others | POSCO and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Shareholder’s loan | Shareholder’s loan |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 8.00% | 8.00% | 8.00% | 8.00% | 8.00% | 8.00% | 8.00% | 8.00% | 8.00% | 8.00% | 8.00% | 8.00%
Borrowings, maturity | 2031 | 2025 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 9,850 | ₩ 12,680 |  | JD 5,419 |  |  |  | $ 10,005 |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Samsung Life Insurance and others | POSCO and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Syndicated Loan | Shareholder’s loan |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 8.00% |  |  |  |  |  | 8.00% | 8.00% | 8.00% | 8.00% | 8.00%
Borrowings, maturity | 2032 | 2031 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 39,707 | ₩ 8,671 |  |  | ¥ 4,350,671 |  |  |  | JD 4,853 |  |  |
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 | Samsung Life Insurance and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Syndicated Loan | Syndicated Loan |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | JPY 6M Tibor+1.84 |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2032 | 2032 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 21,896 | ₩ 45,304 |  |  | ¥ 2,399,088 |  |  |  |  | ¥ 4,752,934 |  |
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 | Solar Construction Lending, LLC | Woori Bank and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Syndicated Loan |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 5.00% |  | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% |  |  |  |  |
Borrowings, interest rate basis |  | JPY 6M Libor+1.84 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2025 | 2032 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 38,545 | ₩ 24,910 | $ 29,894 |  |  |  |  |  |  | ¥ 2,613,385 |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | KiwoomSolar Power Professional Investor Private Placement Investment Trust V | Solar Construction Lendings, LLC |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Senior borrowing | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 3.90% | 5.00% | 3.90% | 3.90% | 3.90% | 3.90% | 3.90% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00%
Borrowings, maturity | 2029 | 2025 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 57,745 | ₩ 39,464 |  |  |  | € 40,478 |  | $ 31,140 |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | IFC and others | KiwoomSolar Power Professional Investor Private Placement Investment Trust V |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Senior borrowing |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 3.90% |  |  |  |  |  | 3.90% | 3.90% | 3.90% | 3.90% | 3.90%
Borrowings, interest rate basis | SOFR(3M)+1.99 SOFR(6M)+5.00 3M BSBY+1.70 6.05~6.62 |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity |  | 2029 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 845,746 | ₩ 54,765 | $ 655,922 |  |  |  |  |  |  |  | € 40,531 |
Foreign long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2024 |  |  |  |  |  |  |  |  |  |  |
Foreign long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
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 | IFC and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 6.00% |  | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% |  |  |  |  |
Borrowings, interest rate basis |  | 6M Libor+5.00 SOFR(3M)+1.83~1.99 5.41~6.19 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2039 |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 78,233 | ₩ 517,575 | $ 60,674 |  |  |  |  | $ 408,408 |  |  |  |
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%
Borrowings, maturity |  | 2028 |  |  |  |  |  |  |  |  |  |
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 | DBS Bank and others | Hanwha US Solar Private Fund and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 3.00% |  |  |  |  |  | 3.00% | 3.00% | 3.00% | 3.00% | 3.00%
Borrowings, interest rate basis | 1M BBSY+1.40~2.25 |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2025 | 2038 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 162,891 | ₩ 73,894 |  |  |  |  | $ 185,086 | $ 58,308 |  |  |  |
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 | Nonghyup Bank and others | DBS Bank and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 10.40% |  | 10.40% | 10.40% | 10.40% | 10.40% | 10.40% |  |  |  |  |
Borrowings, interest rate basis |  | 1M BBSY+1.40~2.25 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2039 | 2025 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 50,027 | ₩ 163,836 | $ 38,799 |  |  |  |  |  |  |  |  | $ 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 |  | 0 |  |  |  |  |  |  |  |  |  |
Borrowings, maturity |  | 0 |  |  |  |  |  |  |  |  |  |
Borrowings |  | ₩ 146 |  |  |  |  |  | $ 116 |  |  |  |

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