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Intangible Assets other than Goodwill - Additional Information (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Research And Development Expenses [Abstract] |  |  |
Research and development expense | ₩ 773,931 | ₩ 717,561 | ₩ 727,810

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- Definition The amount of expenditure directly attributable to research or development activities, recognised in profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2024-01-01 -Paragraph 126 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_126&doctype=Standard -URIDate 2024-03-27 + Details
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Period Type: | duration

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- Definition Research and development expenses. + References No definition available. + Details
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Namespace Prefix: | kep_
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