XML 217 R202.htm IDEA: XBRL DOCUMENT
v3.23.1

Employment Benefits - Additional Information (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure Of Employment Benefit Obligations [Line Items] |  |  |
Gain on accumulated remeasurement components | ₩ 614,805 | ₩ 98,844 |
Return on plan assets | 61,875 | 44,325 |
Construction In Process And Others |  |  |
Disclosure Of Employment Benefit Obligations [Line Items] |  |  |
Employee benefit expense | 14,827 | 13,025 | ₩ 11,861
Cost of sales |  |  |
Disclosure Of Employment Benefit Obligations [Line Items] |  |  |
Employee benefit expense | 101,369 | 71,976 | 60,587
Selling and administrative expense |  |  |
Disclosure Of Employment Benefit Obligations [Line Items] |  |  |
Employee benefit expense | ₩ 28,301 | ₩ 17,144 | ₩ 9,121

X
- Definition The amount of post-employment benefit expense relating to defined contribution plans. Defined contribution plans are post-employment benefit plans under which an entity pays fixed contributions into a separate entity (a fund) and will have no legal or constructive obligation to pay further contributions if the fund does not hold sufficient assets to pay all employee benefits relating to employee service in the current and prior periods. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 53 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_53&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_PostemploymentBenefitExpenseDefinedContributionPlans
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of other comprehensive income, net of tax, resulting from the return on plan assets, excluding amounts included in interest expense (income) arising from defined benefit plans. The return on plan assets is interest, dividends and other revenue derived from the plan assets, together with realised and unrealised gains or losses on the plan assets, less any costs of managing plan assets and less any tax payable by the plan itself, other than tax included in the actuarial assumptions used to measure the present value of the defined benefit obligation. [Refer: Other comprehensive income; Defined benefit plans [member]; Plan assets [member]; Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans] [Contrast: Decrease (increase) in net defined benefit liability (asset) resulting from return on plan assets excluding interest income or expense] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 135 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_135_b&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_ReturnOnPlanAssetsExcludingInterestIncomeOrExpenseNetOfTaxDefinedBenefitPlans
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Disclosure Of Employment Benefit Obligations [Line Items] + References No definition available. + Details
Name: | kep_DisclosureOfEmploymentBenefitObligationsLineItems
Namespace Prefix: | kep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Gain on accumulated remeasurement components of defined benefit plans. + References No definition available. + Details
Name: | kep_GainOnAccumulatedRemeasurementComponentsOfDefinedBenefitPlans
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | kep_BalancesheetlocationAxis=kep_ConstructionInProcessAndOthersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_IncomeStatementLocationAxis=ifrs-full_CostOfSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_IncomeStatementLocationAxis=ifrs-full_SellingGeneralAndAdministrativeExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |