XML 244 R229.htm IDEA: XBRL DOCUMENT
v3.19.1

Fair value measurement of instruments (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Financial assets, category | Assets recognized at fair value |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | ₩ 1,422,765 | ₩ 3,088,485
Fair value |  | 1,422,765 | 3,088,485
Financial assets, category | Assets carried at amortized cost |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 14,022,525 | 12,962,293
Fair value |  | 14,022,525 | 12,962,293
Financial assets at fair value through other comprehensive income | Assets recognized at fair value |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 399,495 | 0
Fair value |  | 399,495 | 0
Available-for-sale financial assets | Assets recognized at fair value |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value | [1] | 0 | 699,833
Fair value | [1] | 0 | 699,833
Derivative Financial Instruments, Assets | Not Designated as Hedging Instrument | Assets recognized at fair value |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 37,631 | 22,020
Fair value |  | 37,631 | 22,020
Derivative Financial Instruments, Assets | Designated as Hedging Instrument | Assets recognized at fair value |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 64,704 | 10,606
Fair value |  | 64,704 | 10,606
Long-term financial instruments | Assets recognized at fair value |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 0 | 542,430
Fair value |  | 0 | 542,430
Long-term financial instruments | Assets carried at amortized cost |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 448,741 | 0
Fair value |  | 448,741 | 0
Short-term financial instruments | Assets recognized at fair value |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 0 | 1,702,084
Fair value |  | 0 | 1,702,084
Short-term financial instruments | Assets carried at amortized cost |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 1,869,286 | 0
Fair value |  | 1,869,286 | 0
Financial assets at fair value through profit or loss | Assets recognized at fair value |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 920,935 | 111,512
Fair value |  | 920,935 | 111,512
Financial assets at amortized cost | Assets carried at amortized cost |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 14,042 | 0
Fair value |  | 14,042 | 0
Held-to-maturity investments | Assets carried at amortized cost |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 0 | 3,144
Fair value |  | 0 | 3,144
Loans and receivables | Assets carried at amortized cost |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 718,674 | 905,641
Fair value |  | 718,674 | 905,641
Trade receivables | Assets carried at amortized cost |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 9,613,437 | 9,683,769
Fair value |  | 9,613,437 | 9,683,769
Cash and Cash Equivalents | Assets carried at amortized cost |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 1,358,345 | 2,369,739
Fair value |  | 1,358,345 | 2,369,739
Liabilities | Assets recognized at fair value |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 312,163 | 428,059
Fair value |  | 312,163 | 428,059
Liabilities | Assets carried at amortized cost |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 70,381,718 | 63,970,393
Fair value |  | 73,009,715 | 66,261,128
Derivative Financial Instruments, Liabilities | Not Designated as Hedging Instrument | Assets recognized at fair value |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 99,010 | 150,929
Fair value |  | 99,010 | 150,929
Derivative Financial Instruments, Liabilities | Designated as Hedging Instrument | Assets recognized at fair value |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 213,153 | 277,130
Fair value |  | 213,153 | 277,130
Secured borrowings | Assets carried at amortized cost |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 741,029 | 1,055,554
Fair value |  | 741,029 | 1,055,554
Unsecured bond | Assets carried at amortized cost |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 56,603,988 | 51,146,783
Fair value |  | 58,804,070 | 53,436,659
Finance lease liabilities | Assets carried at amortized cost |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 283,806 | 418,260
Fair value |  | 283,806 | 418,260
Unsecured borrowings | Assets carried at amortized cost |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 3,522,602 | 2,476,196
Fair value |  | 3,950,517 | 2,477,055
Trade and other payables | Assets carried at amortized cost |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value | [2] | 9,063,285 | 8,804,741
Fair value | [2] | 9,063,285 | 8,804,741
Bank overdraft | Assets carried at amortized cost |  |  |
Disclosure of fair value measurement of instruments [Line Items] |  |  |
Book value |  | 167,008 | 68,859
Fair value |  | ₩ 167,008 | ₩ 68,859
[1] | Book value of equity securities held by the Company that were measured at cost as of December 31, 2017 is KRW37,926 million as a quoted market price does not exist in an active market and its fair value cannot be measured reliably.
[2] | Excludes finance lease liabilities.

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

X
- Definition Financial Instruments Carrying Value + References No definition available. + Details
Name: | kep_FinancialInstrumentsCarryingValue
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Financial Instruments Fair Value + References No definition available. + Details
Name: | kep_FinancialInstrumentsFairValue
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=ifrs-full_FinancialAssetsCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MeasurementAxis=ifrs-full_AtFairValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MeasurementAxis=ifrs-full_NotMeasuredAtFairValueInStatementOfFinancialPositionButForWhichFairValueIsDisclosedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=ifrs-full_FinancialAssetsAvailableforsaleCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=us-gaap_DerivativeFinancialInstrumentsAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
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: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=kep_LongTermFinancialInstrumentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=kep_ShortTermFinancialInstrumentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=ifrs-full_HeldtomaturityInvestmentsCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=ifrs-full_LoansAndReceivablesCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=ifrs-full_TradeReceivablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=us-gaap_CashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=ifrs-full_FinancialLiabilitiesCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=kep_SecuredBorrowingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=kep_UnsecuredBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=kep_FinanceLeaseLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=kep_UnsecuredBorrowingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=kep_TradeAndOtherPayablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kep_CategoriesOfFinancialInstrumentsAxis=kep_BankOverdraftMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |