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v3.20.1

Changes in the allowance for doubtful accounts of finance lease receivables (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Changes in the allowance for doubtful accounts of finance lease receivables [Abstract] |  |
Beginning balance | ₩ 1,133 |
Bad debt expense | 0 | ₩ 1,133
Reversal of allowance for doubtful accounts | (271) | 0
Ending balance | ₩ 862 | ₩ 1,133

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- References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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- References No definition available. + Details
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