XML 149 R133.htm IDEA: XBRL DOCUMENT
v3.21.1

Derivative Interest rate swap contract List (Details) - 12 months ended Dec. 31, 2020 - Interest rate swap contracts $ in Thousands, ₩ in Millions | KRW (₩) | USD ($)
--- | --- | ---
Not Designated as Hedging Instrument [Member] |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Hana Bank |
Derivative, Term of Contract |  | 2017~2022 |
Contract Interest rate Pay |  | 2.01% |
Contract Interest rate Receive |  | 3M CD + 0.24% |
Contract amount |  | ₩ 100,000 |
Not Designated as Hedging Instrument [Member] |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Hana Bank |
Derivative, Term of Contract |  | 2017~2022 |
Contract Interest rate Pay |  | 2.06% |
Contract Interest rate Receive |  | 3M CD + 0.27% |
Contract amount |  | ₩ 100,000 |
Not Designated as Hedging Instrument [Member] |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Hana Bank |
Derivative, Term of Contract |  | 2017~2021 |
Contract Interest rate Pay |  | 2.45% |
Contract Interest rate Receive |  | 3M CD + 0.32% |
Contract amount |  | ₩ 200,000 |
Not Designated as Hedging Instrument [Member] |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Nomura |
Derivative, Term of Contract |  | 2018~2038 |
Contract Interest rate Pay | [1] | 2.56% |
Contract Interest rate Receive |  | 3.75% |
Contract amount |  | ₩ 30,000 |
Not Designated as Hedging Instrument [Member] |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Hana Bank |
Derivative, Term of Contract |  | 2018~2023 |
Contract Interest rate Pay |  | 2.15% |
Contract Interest rate Receive |  | 3M CD + 0.19% |
Contract amount |  | ₩ 200,000 |
Not Designated as Hedging Instrument [Member] |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Hana Bank |
Derivative, Term of Contract |  | 2018~2023 |
Contract Interest rate Pay |  | 2.17% |
Contract Interest rate Receive |  | 3M CD + 0.19% |
Contract amount |  | ₩ 200,000 |
Not Designated as Hedging Instrument [Member] |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Hana Bank |
Derivative, Term of Contract |  | 2018~2023 |
Contract Interest rate Pay |  | 2.03% |
Contract Interest rate Receive |  | 3M CD + 0.21% |
Contract amount |  | ₩ 150,000 |
Not Designated as Hedging Instrument [Member] |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Hana Bank |
Derivative, Term of Contract |  | 2019~2024 |
Contract Interest rate Pay |  | 1.87% |
Contract Interest rate Receive |  | 3M CD + 0.13% |
Contract amount |  | ₩ 200,000 |
Not Designated as Hedging Instrument [Member] |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Societe Generale |
Derivative, Term of Contract |  | 2017~2022 |
Contract Interest rate Pay |  | 3M Libor + 3.44% |
Contract Interest rate Receive |  | 3.77% |
Contract amount |  | ₩ 200,000 |
Not Designated as Hedging Instrument [Member] |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Nomura |
Derivative, Term of Contract |  | 2017~2032 |
Contract Interest rate Pay |  | 3M Libor + 2.22% |
Contract Interest rate Receive |  | 2.60% |
Contract amount |  | ₩ 52,457 |
Not Designated as Hedging Instrument [Member] |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Nomura |
Derivative, Term of Contract |  | 2017~2032 |
Contract Interest rate Pay |  | 3M Libor + 2.24% |
Contract Interest rate Receive |  | 2.62% |
Contract amount |  | ₩ 59,423 |
Designated as Hedging Instrument [Member] |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Export-import Bank of Korea |
Derivative, Term of Contract |  | 2015~2031 |
Contract Interest rate Pay |  | 2.67% |
Contract Interest rate Receive |  | 6M USD Libor |
Contract amount | $ |  |  | $ 15,893
Designated as Hedging Instrument [Member] |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | ING Bank |
Derivative, Term of Contract |  | 2015~2031 |
Contract Interest rate Pay |  | 2.67% |
Contract Interest rate Receive |  | 6M USD Libor |
Contract amount | $ |  |  | 7,861
Designated as Hedging Instrument [Member] |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | BNP Paribas |
Derivative, Term of Contract |  | 2015~2031 |
Contract Interest rate Pay |  | 2.67% |
Contract Interest rate Receive |  | 6M USD Libor |
Contract amount | $ |  |  | 7,861
Designated as Hedging Instrument [Member] |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | BNP Paribas |
Derivative, Term of Contract |  | 2009~2027 |
Contract Interest rate Pay |  | 4.16% |
Contract Interest rate Receive |  | 6M USD Libor |
Contract amount | $ |  |  | 69,509
Designated as Hedging Instrument [Member] |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | KFW |
Derivative, Term of Contract |  | 2009~2027 |
Contract Interest rate Pay |  | 4.16% |
Contract Interest rate Receive |  | 6M USD Libor |
Contract amount | $ |  |  | 69,509
Designated as Hedging Instrument [Member] |  |  |
Disclosure of Derivative Interest rate swap contract detail list [Line Items] |  |  |
Counterparty |  | Export-import Bank of Korea |
Derivative, Term of Contract |  | 2016~2036 |
Contract Interest rate Pay |  | 3.00% |
Contract Interest rate Receive |  | 6M USD Libor |
Contract amount | $ |  |  | $ 75,929
[1] | 2.56% of the contract paying interest rate is applied for five years from the date of issuance, and 3M CD + 0.10% is applied thereafter. Depending on the counterparty exercising the right, the contract may be early settled on the same date every year from June 15, 2023.

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

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

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

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

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

X
- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 + Details
Name: | us-gaap_DerivativeNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=kep_InterestRateSwapContracts1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=kep_InterestRateSwapContracts2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=kep_InterestRateSwapContracts3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=kep_InterestRateSwapContracts4Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=kep_InterestRateSwapContracts5Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=kep_InterestRateSwapContracts6Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=kep_InterestRateSwapContracts7Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=kep_InterestRateSwapContracts8Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=kep_InterestRateSwapContracts9Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=kep_InterestRateSwapContracts10Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=kep_InterestRateSwapContracts11Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |