XML 208 R196.htm IDEA: XBRL DOCUMENT
v3.22.1

Employment Benefits - Summary of Expense Relating to Defined Benefit Plans by Nature (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of defined benefit plans [line items] |  |  |
Defined benefit | ₩ 569,520 | ₩ 547,999 | ₩ 781,747
Cost of sales [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Defined benefit | 415,959 | 397,442 | 580,623
Selling, general and administrative expense [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Defined benefit | 95,983 | 94,846 | 120,455
Others (Construction-in-progress and others) [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Defined benefit | ₩ 57,578 | ₩ 55,711 | ₩ 80,669

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfDefinedBenefitPlansLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined benefit. + References No definition available. + Details
Name: | kep_DefinedBenefitPlansExpense
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

X
- Details
Name: | ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis=ifrs-full_ConstructionInProgressMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |