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Borrowings and Debt Securities - Local Debt Securities and Foreign Debt Securities (Parenthetical) (Details) - Hee mang sunlight Power Co., Ltd [Member] ₩ in Millions | 12 Months Ended
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Dec. 31, 2022 KRW (₩)
Debt Instrument [Line Items] |
Value of bonds entitled to premature redemption | ₩ 1,619
Premature redemption due date | Mar. 31, 2021

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- Definition Debt instrument. + 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 Premature redemption due date. + References No definition available. + Details
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Namespace Prefix: | kep_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Definition Value of bonds entitled to premature redemption. + References No definition available. + Details
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Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |