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v3.23.1

Contingencies and Commitments - Additional Information (Details) € in Thousands, Rp in Thousands, $ in Thousands, ₩ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 KRW (₩) | Dec. 31, 2022 USD ($) | Dec. 31, 2022 EUR (€) | Dec. 31, 2022 USD ($) | Dec. 31, 2022 IDR (Rp) | Dec. 31, 2022 EUR (€) | Dec. 31, 2021 KRW (₩)
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Borrowings | ₩ | ₩ 120,605,365 |  |  |  |  |  | ₩ 80,529,513
January 1 2024 (Member) |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Threshold revenue beyond which global minimum tax is applicable | € |  |  | € 750,000 |  |  |  |
Axia Power Holdings B.V [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Maximum Performance Guarantee Amount |  |  |  | $ 54,000 |  |  |
PT Perusahaan Listrik Negara [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Maximum Performance Guarantee Amount | Rp |  |  |  |  | Rp 35,588,165 |  |
Morgan Stanley Capital Group Inc [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Maximum Performance Guarantee Amount |  |  |  | 50,000 |  |  |
Morgan Stanley Renewables Inc [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Maximum Performance Guarantee Amount |  |  |  | 70,000 |  |  |
Frankfurt Branch Through Kookmin Bank [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Maximum Performance Guarantee Amount | € |  |  |  |  |  | € 10,000 |
Microsoft Through Kookmin Bank [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Maximum Performance Guarantee Amount | € |  |  |  |  |  | 5,022 |
Ellevio Through Shinhan Bank [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Maximum Performance Guarantee Amount | € |  |  |  |  |  | € 9,980 |
Shinhan Bank [Member] | Concho Valley Energy, LLC [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Provision for loss contingencies |  | $ 60,000 |  |  |  |  |
Other Borrowings Guarantee Amount |  |  |  | 60,000 |  |  |
PT. Cirebon Electro Power [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Maximum Performance Guarantee Amount |  |  |  | 54,000 |  |  |
Export Import Bank Of Korea ,BNP Paribas And ING Bank [Member] | PT BS Energy And PT Nusantara Hydro Alam [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Guarantee for investments |  |  |  | 5,947 |  |  |
KOMIPO Vanphong Power Service LLC [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Maximum Performance Guarantee Amount |  |  |  | 5,000 |  |  |
Gaesong Industrial Complex [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Book value of facility | ₩ | 12,967 |  |  |  |  |  |
Gangneung [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Suspended operations of plant carrying amount | ₩ | 66,879 |  |  |  |  |  |
Expenses related to suspension of operations | ₩ | 1,683 |  |  |  |  |  |
Depreaciation on idle assets | ₩ | 3,635 |  |  |  |  |  |
AEP Texas Inc [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Business performance guarantees |  |  |  | 18,500 |  |  |
Korea Energy Agency [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Borrowings | ₩ | 1,197 |  |  |  |  |  |
Mizuho Bank [Member] | PT. Cirebon Electro Power [Member] | Nongyup Bank [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Payment guarantee |  |  |  | 47,850 |  |  |
SMBC [Member] | Pt Mega Power Mandiri [Member] | PT Wampu Electric Power [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Guarantee for investments |  |  |  | 4,401 |  |  |
RBC Community Investments Impact Renewables Hold Co One LLC [Member] | Concho Valley Energy, LLC [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Maximum Performance Guarantee Amount |  |  |  | 3,000 |  |  |
International Finance Corporation [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  | 275,600 |  |  |
Capital commitments |  |  |  | 69,808 |  |  |
Additional capital contribution for contingencies |  |  |  | $ 19,000 |  |  |
Guarantee payment provided |  | $ 2,777 |  |  |  |  |
Ordinary Wages And Unpaid Wages [Member] |  |  |  |  |  |  |
Detailed Information About Commitments [Line Items] |  |  |  |  |  |  |
Provision for loss contingencies | ₩ | ₩ 114,937 |  |  |  |  |  |

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