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Hybrid bond (Parentheticals) (Details) | 12 Months Ended
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Dec. 31, 2023
Hybrid Bonds [Abstract] |
Hybrid Bonds, Repayment Term | 12 years

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- References No definition available. + Details
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Namespace Prefix: | kep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Hybrid bonds repayment term. + References No definition available. + Details
Name: | kep_HybridBondsRepaymentTerm
Namespace Prefix: | kep_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration