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v3.19.1

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

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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: | instant

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

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

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

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