XML 152 R136.htm IDEA: XBRL DOCUMENT
v3.21.1

Other-Financial Assets : Changes in the allowance for doubtful accounts of Loans and receivables (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Allowance for doubtful accounts [Abstract] |  |  |
Beginning balance | ₩ 15,094 | ₩ 4,952 | ₩ 8,948
Bad debt expense | 5,173 | 10,142 | 22
Other | 0 | 0 | (4,018)
Ending balance | ₩ 20,267 | ₩ 15,094 | ₩ 4,952

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

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

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

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