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Borrowings and Debt Securities - Long-term Borrowings (Details) € in Thousands, ¥ in Thousands, JD in Thousands, $ in Thousands, $ in Thousands, ₩ in Millions | 12 Months Ended |  |
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Dec. 31, 2024 KRW (₩) | Dec. 31, 2023 KRW (₩) | Dec. 31, 2024 USD ($) | Dec. 31, 2024 JOD (JD) | Dec. 31, 2024 JPY (¥) | Dec. 31, 2024 EUR (€) | Dec. 31, 2024 AUD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 JOD (JD) | Dec. 31, 2023 JPY (¥) | Dec. 31, 2023 EUR (€) | Dec. 31, 2023 AUD ($)
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 11,588,197 | ₩ 9,188,152 |  |  |  |  |  |  |  |  |  |
Less: Discount on long-term borrowings | (51,608) | (15,835) |  |  |  |  |  |  |  |  |  |
Less: Current portion of long-term borrowings | (8,434,330) | (5,780,638) |  |  |  |  |  |  |  |  |  |
Add: Current portion of discount on long-term borrowings | 16,537 | 1,152 |  |  |  |  |  |  |  |  |  |
Long-term borrowings | 3,118,796 | 3,392,831 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 9,367,153 | ₩ 7,304,875 |  |  |  |  |  |  |  |  |  |
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 | ₩ 1,424 | ₩ 1,758 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2025 | 2024 |  |  |  |  |  |  |  |  |  |
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 | ₩ 51,960 | ₩ 53,052 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 2.60% | 2.60% | 2.60% | 2.60% | 2.60% | 2.60% | 2.60% | 2.60% | 2.60% | 2.60% | 2.60% | 2.60%
Borrowings, maturity | 2025 | 2025 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 4.94% | 4.94% | 4.94% | 4.94% | 4.94% | 4.94% | 4.94% | 4.94% | 4.94% | 4.94% | 4.94% | 4.94%
Borrowings, maturity | 2042 | 2042 |  |  |  |  |  |  |  |  |  |
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 | CB rate |  |  |  |  |  |  |  |  |  |
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 | 2029 | 2029 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 9,486 | ₩ 9,985 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Hana Bank and others | Korea Development Bank |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Commercial Paper | Operating funds |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | 3M CD | 1yr KDB |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 0.91% |  |  |  |  |  | 0.91% | 0.91% | 0.91% | 0.91% | 0.91%
Borrowings, maturity |  | 2024 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 7,550,000 | ₩ 40,000 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 0.31% |  | 0.31% | 0.31% | 0.31% | 0.31% | 0.31% |  |  |  |  |
Borrowings, maturity | 2025 |  |  |  |  |  |  |  |  |  |  |
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% |  |  |  |  |
Borrowings, maturity | 2029 |  |  |  |  |  |  |  |  |  |  |
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 | Commercial Paper |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 4.60% |  | 4.60% | 4.60% | 4.60% | 4.60% | 4.60% |  |  |  |  |
Borrowings, interest rate basis |  | 3M CD |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2028 |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 4,904 | ₩ 5,350,000 |  |  |  |  |  |  |  |  |  |
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%
Borrowings, maturity |  | 2024 |  |  |  |  |  |  |  |  |  |
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%
Borrowings, maturity |  | 2028 |  |  |  |  |  |  |  |  |  |
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%
Borrowings, interest rate basis | 3yr KTB rate |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 1.25% |  | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% |  |  |  |  |
Borrowings, maturity | 2028 | 2028 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 2,492 | ₩ 6,558 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Export-Import Bank of Korea | Hana Bank and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Project loans | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 1.00% |  | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% |  |  |  |  |
Borrowings, interest rate basis |  | 3yr KTB rate |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 2.50% |  |  |  |  |  | 2.50% | 2.50% | 2.50% | 2.50% | 2.50%
Borrowings, maturity | 2026 | 2028 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 4,419 | ₩ 3,156 |  |  |  |  |  |  |  |  |  |
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% | 1.00% | 1.32% | 1.32% | 1.32% | 1.32% | 1.32% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00%
Borrowings, maturity |  | 2026 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 64,000 | ₩ 7,365 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2025 |  |  |  |  |  |  |  |  |  |  |
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 | Export-Import Bank of Korea |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Operating funds | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 1.32% |  |  |  |  |  | 1.32% | 1.32% | 1.32% | 1.32% | 1.32%
Borrowings, interest rate basis | 3M bank debenture rate |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 0.66% |  | 0.66% | 0.66% | 0.66% | 0.66% | 0.66% |  |  |  |  |
Borrowings, maturity | 2026 | 2028 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 50,000 | ₩ 80,000 |  |  |  |  |  |  |  |  |  |
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 | 1.75% |  | 1.75% | 1.75% | 1.75% | 1.75% | 1.75% |  |  |  |  |
Borrowings, interest rate basis | 3yr KTB rate | 3M Bank debenture rate |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 2.25% | 0.66% | 2.25% | 2.25% | 2.25% | 2.25% | 2.25% | 0.66% | 0.66% | 0.66% | 0.66% | 0.66%
Borrowings, maturity |  | 2026 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 7,494 | ₩ 40,000 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2025 |  |  |  |  |  |  |  |  |  |  |
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 | Project loans | Development of powerresources |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 2.25% |  |  |  |  |  | 2.25% | 2.25% | 2.25% | 2.25% | 2.25%
Borrowings, interest rate basis |  | 3yr KTB rate |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 2.25% |  |  |  |  |  | 2.25% | 2.25% | 2.25% | 2.25% | 2.25%
Borrowings, maturity | 2033 |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 1,197 | ₩ 9,176 |  |  |  |  |  |  |  |  |  |
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 |  | 2028 |  |  |  |  |  |  |  |  |  |
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 | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | CB rate | 3yr KTB rate |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 1.50% |  |  |  |  |  | 1.50% | 1.50% | 1.50% | 1.50% | 1.50%
Borrowings, maturity |  | 2024 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 13,995 | ₩ 163 |  |  |  |  |  |  |  |  |  |
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 | Operating funds | Project loans |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | 6M bank debenture rate | — |  |  |  |  |  |  |  |  |  |
Borrowings, maturity |  | 2033 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 50,000 | ₩ 1,197 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 0.93% |  | 0.93% | 0.93% | 0.93% | 0.93% | 0.93% |  |  |  |  |
Borrowings, maturity | 2025 |  |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 1.03% |  | 1.03% | 1.03% | 1.03% | 1.03% | 1.03% |  |  |  |  |
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 | Others | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 3.95% |  | 3.95% | 3.95% | 3.95% | 3.95% | 3.95% |  |  |  |  |
Borrowings, interest rate basis |  | CB rate |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2034 |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 67,733 | ₩ 16,825 |  |  |  |  |  |  |  |  |  |
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 | Shinhan Bank and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Others | Operating funds |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | Standard overdraft rate | 6M Bank debenture rate |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 1.00% | 0.93% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00% | 0.93% | 0.93% | 0.93% | 0.93% | 0.93%
Borrowings, maturity | 2034 | 2025 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 67,733 | ₩ 20,000 |  |  |  |  |  |  |  |  |  |
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 | Commercial Paper |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | 3M CD | 3M CD |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 1.79% | 0.38% | 1.79% | 1.79% | 1.79% | 1.79% | 1.79% | 0.38% | 0.38% | 0.38% | 0.38% | 0.38%
Borrowings, maturity |  | 2025 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 167,945 | ₩ 150,000 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 5.53% |  | 5.53% | 5.53% | 5.53% | 5.53% | 5.53% |  |  |  |  |
Borrowings, maturity | 2030 |  |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 5.63% |  | 5.63% | 5.63% | 5.63% | 5.63% | 5.63% |  |  |  |  |
Borrowings, maturity | 2037 |  |  |  |  |  |  |  |  |  |  |
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 | Operating funds | Others |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 3.95% |  |  |  |  |  | 3.95% | 3.95% | 3.95% | 3.95% | 3.95%
Borrowings, interest rate basis | 1yr bank debenture rate |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 0.78% |  | 0.78% | 0.78% | 0.78% | 0.78% | 0.78% |  |  |  |  |
Borrowings, maturity | 2025 | 2034 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 20,000 | ₩ 73,425 |  |  |  |  |  |  |  |  |  |
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 | Facility | Others |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | 3M CD | Standard overdraft rate |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 1.90% | 1.00% | 1.90% | 1.90% | 1.90% | 1.90% | 1.90% | 1.00% | 1.00% | 1.00% | 1.00% | 1.00%
Borrowings, maturity |  | 2034 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 100,071 | ₩ 73,425 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 5.12% |  | 5.12% | 5.12% | 5.12% | 5.12% | 5.12% |  |  |  |  |
Borrowings, maturity | 2034 |  |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 5.61% |  | 5.61% | 5.61% | 5.61% | 5.61% | 5.61% |  |  |  |  |
Borrowings, maturity | 2042 |  |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | IBK | 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 |  | 1yr Bank debenture rate |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis |  | 3M CD |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 0.78% |  |  |  |  |  | 0.78% | 0.78% | 0.78% | 0.78% | 0.78%
Borrowings | ₩ 30,690 | ₩ 186,032 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 4.00% |  | 4.00% | 4.00% | 4.00% | 4.00% | 4.00% |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 1.79% |  |  |  |  |  | 1.79% | 1.79% | 1.79% | 1.79% | 1.79%
Borrowings, maturity | 2042 | 2025 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 5.80% |  | 5.80% | 5.80% | 5.80% | 5.80% | 5.80% |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 2.10% |  |  |  |  |  | 2.10% | 2.10% | 2.10% | 2.10% | 2.10%
Borrowings, maturity | 2044 | 2037 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Nonghyup Bank | Woori 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 |  | Standard overdraft rate |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis |  | 3M CD |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 1.60% |  |  |  |  |  | 1.60% | 1.60% | 1.60% | 1.60% | 1.60%
Borrowings, adjustment to interest rate basis |  | 1.90% |  |  |  |  |  | 1.90% | 1.90% | 1.90% | 1.90% | 1.90%
Borrowings | ₩ 36,351 | ₩ 101,172 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 5.53% |  | 5.53% | 5.53% | 5.53% | 5.53% | 5.53% |  |  |  |  |
Borrowings, maturity | 2030 | 2034 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 5.63% |  | 5.63% | 5.63% | 5.63% | 5.63% | 5.63% |  |  |  |  |
Borrowings, maturity | 2041 | 2042 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Others | IBK |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 801,687 | ₩ 30,690 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 3.30% | 4.00% | 3.30% | 3.30% | 3.30% | 3.30% | 3.30% | 4.00% | 4.00% | 4.00% | 4.00% | 4.00%
Borrowings, maturity | 2028 | 2042 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 6.80% | 5.80% | 6.80% | 6.80% | 6.80% | 6.80% | 6.80% | 5.80% | 5.80% | 5.80% | 5.80% | 5.80%
Borrowings, maturity | 2042 | 2044 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Others | Nonghyup Bank |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | CB rate | 3M CD |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 1.10% |  | 1.10% | 1.10% | 1.10% | 1.10% | 1.10% |  |  |  |  |
Borrowings | ₩ 24,517 | ₩ 22,517 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 2.25% | 2.00% | 2.25% | 2.25% | 2.25% | 2.25% | 2.25% | 2.00% | 2.00% | 2.00% | 2.00% | 2.00%
Borrowings, maturity | 2028 | 2030 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 5.63% | 2.10% | 5.63% | 5.63% | 5.63% | 5.63% | 5.63% | 2.10% | 2.10% | 2.10% | 2.10% | 2.10%
Borrowings, maturity | 2041 | 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 | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | CB rate |  |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 1.25% |  | 1.25% | 1.25% | 1.25% | 1.25% | 1.25% |  |  |  |  |
Borrowings, maturity | 2030 |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 5,726 | ₩ 735,722 |  |  |  |  |  |  |  |  |  |
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 | PF Refinancing | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 4.10% |  | 4.10% | 4.10% | 4.10% | 4.10% | 4.10% |  |  |  |  |
Borrowings, interest rate basis |  | CB rate |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis |  | 3M CD |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 1.10% |  |  |  |  |  | 1.10% | 1.10% | 1.10% | 1.10% | 1.10%
Borrowings, adjustment to interest rate basis |  | 2.10% |  |  |  |  |  | 2.10% | 2.10% | 2.10% | 2.10% | 2.10%
Borrowings, maturity | 2030 |  |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 15,905 | ₩ 51,509 |  |  |  |  |  |  |  |  |  |
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, maturity |  | 2024 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 3.30% |  |  |  |  |  | 3.30% | 3.30% | 3.30% | 3.30% | 3.30%
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 | Securitized debts (*) | PF Refinancing |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | 3M CD | CB rate |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 1.80% | 1.25% | 1.80% | 1.80% | 1.80% | 1.80% | 1.80% | 1.25% | 1.25% | 1.25% | 1.25% | 1.25%
Borrowings, maturity | 2025 | 2030 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 54,236 | ₩ 6,680 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Others | Others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Others | PF Refinancing |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 4.10% |  |  |  |  |  | 4.10% | 4.10% | 4.10% | 4.10% | 4.10%
Borrowings, maturity |  | 2030 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 113,362 | ₩ 18,556 |  |  |  |  |  |  |  |  |  |
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 | Others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Others | Securitized debts |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis |  | 3M CD |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 1.80% |  |  |  |  |  | 1.80% | 1.80% | 1.80% | 1.80% | 1.80%
Borrowings, maturity |  | 2025 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 49,826 | ₩ 52,060 |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 2.00% |  | 2.00% | 2.00% | 2.00% | 2.00% | 2.00% |  |  |  |  |
Borrowings, maturity | 2031 |  |  |  |  |  |  |  |  |  |  |
Local long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 6.15% |  | 6.15% | 6.15% | 6.15% | 6.15% | 6.15% |  |  |  |  |
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 | ₩ 2,221,044 | ₩ 1,883,277 |  |  |  |  |  |  |  |  |  |
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 | ₩ 12,853 | ₩ 11,274 | $ 8,744 |  |  |  |  | $ 8,744 |  |  |  |
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 Synthetic Libor | 6M Synthetic Libor |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2036 | 2036 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 106,080 | ₩ 101,020 | $ 72,163 |  |  |  |  | $ 78,347 |  |  |  |
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% | 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% | 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 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 Synthetic Libor | 6M Synthetic Libor |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2027 | 2027 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 91,437 | ₩ 113,390 |  | JD 44,126 |  |  |  |  | JD 62,385 |  |  |
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% | 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% | 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 | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | SOFR | 6M Synthetic Libor |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | SOFR(1M) | SOFR(1M) |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 0.43% | 1.83% | 0.43% | 0.43% | 0.43% | 0.43% | 0.43% | 1.83% | 1.83% | 1.83% | 1.83% | 1.83%
Borrowings, adjustment to interest rate basis | 1.83% |  | 1.83% | 1.83% | 1.83% | 1.83% | 1.83% |  |  |  |  |
Borrowings | ₩ 165,628 | ₩ 155,909 | $ 112,672 |  |  |  |  | $ 120,916 |  |  |  |
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%
Borrowings, maturity | 2029 | 2029 |  |  |  |  |  |  |  |  |  |
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%
Borrowings, maturity | 2031 | 2031 |  |  |  |  |  |  |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Korea Development Bank and others | Korea Development Bank and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | EBL | EBL |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | SOFR(1M) | SOFR(1M) |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 0.86% | 0.86% | 0.86% | 0.86% | 0.86% | 0.86% | 0.86% | 0.86% | 0.86% | 0.86% | 0.86% | 0.86%
Borrowings, maturity | 2025 | 2025 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 219,900 | ₩ 183,157 | $ 149,592 |  |  |  |  | $ 142,049 |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | POSCO E&C and others | POSCO E&C and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Shareholder’s loan | Shareholder’s loan |  |  |  |  |  |  |  |  |  |
Borrowings, maturity |  | 2025 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 14,914 | ₩ 13,887 | $ 10,145 |  |  |  |  | $ 10,770 |  |  |  |
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% | 5.60% | 5.60% | 5.60% | 5.60% | 5.60% | 5.60%
Borrowings, maturity | 2025 |  |  |  |  |  |  |  |  |  |  |
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% | 8.00% | 8.00% | 8.00% | 8.00% | 8.00% | 8.00%
Borrowings, maturity | 2026 |  |  |  |  |  |  |  |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | POSCO E&C and others | POSCO E&C 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 | 2031 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 10,056 | ₩ 9,850 |  | JD 4,853 |  |  |  |  | JD 5,419 |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Samsung Life Insurance and others | Samsung Life Insurance and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Syndicated Loan | Syndicated Loan |  |  |  |  |  |  |  |  |  |
Borrowings, maturity |  | 2032 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 36,878 | ₩ 39,707 |  |  | ¥ 3,937,987 |  |  |  |  | ¥ 4,350,671 |  |
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% | 3.10% | 3.10% | 3.10% | 3.10% | 3.10% | 3.10%
Borrowings, maturity | 2025 |  |  |  |  |  |  |  |  |  |  |
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% | 8.00% | 8.00% | 8.00% | 8.00% | 8.00% | 8.00%
Borrowings, maturity | 2032 |  |  |  |  |  |  |  |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Woori Bank and others | Woori Bank and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Syndicated Loan | Syndicated Loan |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | JPY 6M Tibor | JPY 6M Tibor |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis | 1.84% | 1.84% | 1.84% | 1.84% | 1.84% | 1.84% | 1.84% | 1.84% | 1.84% | 1.84% | 1.84% | 1.84%
Borrowings, maturity | 2025 | 2032 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 20,397 | ₩ 21,896 |  |  | ¥ 2,178,069 |  |  |  |  | ¥ 2,399,088 |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Solar Construction Lending, LLC | Solar Construction Lending, LLC |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00%
Borrowings, maturity | 2025 | 2025 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 41,605 | ₩ 38,545 | $ 28,303 |  |  |  |  | $ 29,894 |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Kiwoom Solar Power Professional Investor Private Placement Investment Trust V | Kiwoom Solar Power Professional Investor Private Placement Investment Trust V |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Senior borrowing | Senior borrowing |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 3.90% | 3.90% | 3.90% | 3.90% | 3.90% | 3.90% | 3.90% | 3.90% | 3.90% | 3.90% | 3.90% | 3.90%
Borrowings, maturity | 2029 | 2029 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 58,304 | ₩ 57,745 |  |  |  | € 38,139 |  |  |  |  | € 40,478 |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | IFC and others | IFC and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | SOFR(3M) | SOFR(3M) |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | SOFR(6M) | SOFR(6M) |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis |  | 3M BSBY |  |  |  |  |  |  |  |  |  |
Borrowings, adjustment to interest rate basis |  | 1.99% |  |  |  |  |  | 1.99% | 1.99% | 1.99% | 1.99% | 1.99%
Borrowings, adjustment to interest rate basis | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00% | 5.00%
Borrowings, adjustment to interest rate basis |  | 1.70% |  |  |  |  |  | 1.70% | 1.70% | 1.70% | 1.70% | 1.70%
Borrowings | ₩ 1,136,092 | ₩ 845,746 | $ 772,852 |  |  |  |  | $ 655,922 |  |  |  |
Foreign long-term borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 6.19% | 6.05% | 6.19% | 6.19% | 6.19% | 6.19% | 6.19% | 6.05% | 6.05% | 6.05% | 6.05% | 6.05%
Borrowings, adjustment to interest rate basis | 1.60% |  | 1.60% | 1.60% | 1.60% | 1.60% | 1.60% |  |  |  |  |
Borrowings, maturity | 2026 | 2024 |  |  |  |  |  |  |  |  |  |
Foreign long-term borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 7.22% | 6.62% | 7.22% | 7.22% | 7.22% | 7.22% | 7.22% | 6.62% | 6.62% | 6.62% | 6.62% | 6.62%
Borrowings, adjustment to interest rate basis | 1.99% |  | 1.99% | 1.99% | 1.99% | 1.99% | 1.99% |  |  |  |  |
Borrowings, maturity | 2032 | 2031 |  |  |  |  |  |  |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | Hanwha US Solar Private Fund 1 and others | Hanwha US Solar Private Fund 1 and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00%
Borrowings, maturity | 2038 | 2039 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 89,292 | ₩ 78,233 | $ 60,743 |  |  |  |  | $ 60,674 |  |  |  |
Foreign long-term borrowings |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about Long-term borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Name of Creditor | DBS Bank and others | DBS Bank and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis | 1M BBSY | 1M BBSY |  |  |  |  |  |  |  |  |  |
Borrowings, maturity | 2025 | 2025 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 163,301 | ₩ 162,891 |  |  |  |  | $ 178,729 |  |  |  |  | $ 185,086
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% | 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% | 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 | Nonghyup Bank and others |  |  |  |  |  |  |  |  |  |
Purpose of borrowings | Facility | Facility |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate | 10.40% | 10.40% | 10.40% | 10.40% | 10.40% | 10.40% | 10.40% | 10.40% | 10.40% | 10.40% | 10.40% | 10.40%
Borrowings, maturity | 2039 | 2039 |  |  |  |  |  |  |  |  |  |
Borrowings | ₩ 54,307 | ₩ 50,027 | $ 36,943 |  |  |  |  | $ 38,799 |  |  |  |

X
- Definition The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_7&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_7&doctype=Standard -URIDate 2024-03-27 + Details
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