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Related Parties - Summary of Loans and Others Arising From Related Party Transaction (Details) ₩ in Millions | 12 Months Ended
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Dec. 31, 2023 KRW (₩)
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | ₩ 627,214 |
Changes in Loans receivable transactions between related parties |  |
Loans | (37,641) |
Collection | (33,159) |
Others | 11,272 |
Ending balance | 567,686 |
KNOC Nigerian East & West Oil Co., Ltd. | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 31,473 |
Changes in Loans receivable transactions between related parties |  |
Loans | 170 |
Collection | 0 |
Others | 510 |
Ending balance | 32,153 |
KNOC Nigerian East & West Oil Co., Ltd. | Accumulated impairment [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | (10,751) |
Changes in Loans receivable transactions between related parties |  |
Loans | (12,995) |
Collection | 0 |
Others | (1,797) |
Ending balance | (25,543) |
Nepal Water & Energy Development Company Private Limited | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 19,914 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | (1,862) |
Ending balance | 18,052 |
Xe-Pian Xe-Namnoy Power Co., Ltd. | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 22,936 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | 401 |
Ending balance | 23,337 |
PT Wampu Electric Power | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 9,171 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | (9,613) |
Others | 442 |
Ending balance | 0 |
Bigeum Resident Photovoltaic Power Co., Ltd. [Member] | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 11,212 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | (1,687) |
Ending balance | 9,525 |
PT. Cirebon Energi Prasarana | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 29,569 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | 5,973 |
Ending balance | 35,542 |
Daejung Offshore Wind Power Co., Ltd. | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 1,000 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | 0 |
Ending balance | 1,000 |
Bitgoel Eco Energy Co., Ltd. [Member] | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 34,790 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | (3,905) |
Others | 0 |
Ending balance | 30,885 |
Saemangeum Sebit Power Plant Co., Ltd. | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 37,249 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | (8,279) |
Others | 0 |
Ending balance | 28,970 |
Solaseado Solar Power Co., Ltd. | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 35,000 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | 0 |
Ending balance | 35,000 |
Recursos Solares PV De Mexico II, S.A. De C.V. | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 8,457 |
Changes in Loans receivable transactions between related parties |  |
Loans | 1,944 |
Collection | 0 |
Others | 188 |
Ending balance | 10,589 |
HORUS SOLAR, S.A. DE C.V. | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 19,287 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | (8,552) |
Others | 464 |
Ending balance | 11,199 |
SUNMEX RENOVABLES, S.A. DE C.V. | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 16,383 |
Changes in Loans receivable transactions between related parties |  |
Loans | 536 |
Collection | 0 |
Others | 291 |
Ending balance | 17,210 |
Kelar S.A | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 43,965 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | (2,980) |
Ending balance | 40,985 |
DE Energia SpA | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 7,260 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | 126 |
Ending balance | 7,386 |
Daehan Wind Power PSC | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 14,618 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | 254 |
Ending balance | 14,872 |
Bitsolar Energy Co., Ltd. | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 3,165 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | 0 |
Ending balance | 3,165 |
Daesan Green Energy Co., Ltd. | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 3,514 |
Changes in Loans receivable transactions between related parties |  |
Loans | 190 |
Collection | (1,293) |
Others | 0 |
Ending balance | 2,411 |
Yangyang Wind Power Co., Ltd. | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 0 |
Changes in Loans receivable transactions between related parties |  |
Loans | 3,257 |
Collection | 0 |
Others | 0 |
Ending balance | 3,257 |
Nghi Son 2 Power LLC | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 186,735 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | 3,256 |
Ending balance | 189,991 |
Pulau Indah Power Plant Sdn. Bhd. | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 10,207 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | (244) |
Ending balance | 9,963 |
Guadalupe Solar SpA | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 3,344 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | (225) |
Others | 42 |
Ending balance | 3,161 |
Foresight Iberian Solar Group Holding, S.L. | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 61,302 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | (1,292) |
Others | 4,308 |
Ending balance | 64,318 |
Capman Lynx SCA, SICAR | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 31,628 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | 3,582 |
Ending balance | 35,210 |
Capman Lynx SCA, SICAR | Accumulated impairment [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | (4,467) |
Changes in Loans receivable transactions between related parties |  |
Loans | (30,743) |
Collection | 0 |
Others | 0 |
Ending balance | (35,210) |
SPower Chile SpA [Member] | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 253 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | 5 |
Ending balance | 258 |
KEPCO Lebanon SARL | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 3,834 |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | 0 |
Ending balance | 3,834 |
KEPCO Lebanon SARL | Accumulated impairment [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | (3,834) |
Changes in Loans receivable transactions between related parties |  |
Loans | 0 |
Collection | 0 |
Others | 0 |
Ending balance | (3,834) |
Gunsan Bio Energy Co., Ltd. | Gross carrying amount [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | 12,396 | [1]
Changes in Loans receivable transactions between related parties |  |
Loans | 0 | [1]
Collection | 0 | [1]
Others | 0 | [1]
Ending balance | 12,396 | [1]
Gunsan Bio Energy Co., Ltd. | Accumulated impairment [member] |  |
Disclosure of Loans transactions between related parties [Line Items] |  |
Beginning balance | (12,396) | [1]
Changes in Loans receivable transactions between related parties |  |
Loans | 0 | [1]
Collection | 0 | [1]
Others | 0 | [1]
Ending balance | ₩ (12,396) | [1]
[1] | Bankruptcy was declared during the year ended December 31, 2023. The Company cannot hold significant influence due to the appointment of a bankruptcy trustee, so the Company was reclassified from an associate to financial assets at fair value through other comprehensive income.

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