XML 250 R165.htm IDEA: XBRL DOCUMENT
v3.20.1

Disclosure of quantitative information about right-of-use assets (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Effect of change in accounting policy |  | ₩ 4,947,947 |  | ₩ 0
Increase |  | 14,221,355 |  | 12,266,870
Depreciation |  | (581,074) |  |
Right-of-use assets |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Effect of change in accounting policy |  | 5,143,651 |  |
Increase |  | 220,996 |  |
Depreciation |  | (581,074) |  |
Ending balance |  | 4,783,573 |  |
Right-of-use assets | Acquisition cost |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Ending balance |  | 7,574,010 |  |
Right-of-use assets | Accumulated depreciation |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Ending balance |  | (2,790,437) |  |
Land |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Effect of change in accounting policy |  | 684,386 |  |
Increase |  | 8,717 |  |
Depreciation |  | (49,029) |  |
Ending balance |  | 644,074 |  | 0
Land | Acquisition cost |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Ending balance |  | 693,103 |  | 0
Land | Accumulated depreciation |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Ending balance |  | (49,029) |  | 0
Buildings |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Effect of change in accounting policy |  | 36,874 |  |
Increase |  | 18,106 |  |
Depreciation |  | (20,403) |  |
Ending balance |  | 34,577 |  | 0
Buildings | Acquisition cost |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Ending balance |  | 54,980 |  | 0
Buildings | Accumulated depreciation |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Ending balance |  | (20,403) |  | 0
Structures |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Effect of change in accounting policy |  | 20,840 |  |
Increase |  | 7,358 |  |
Depreciation |  | (2,554) |  |
Ending balance |  | 25,644 |  | 0
Structures | Acquisition cost |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Ending balance |  | 28,198 |  | 0
Structures | Accumulated depreciation |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Ending balance |  | (2,554) |  | 0
Machinery |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Effect of change in accounting policy |  | 0 |  |
Increase |  | 1,308 |  |
Depreciation |  | (484) |  |
Ending balance |  | 824 |  | 0
Machinery | Acquisition cost |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Ending balance |  | 1,308 |  | 0
Machinery | Accumulated depreciation |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Ending balance |  | (484) |  | 0
Ships |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Effect of change in accounting policy |  | 3,986,947 |  |
Increase |  | 126,807 |  |
Depreciation |  | (425,465) |  |
Ending balance |  | 3,688,289 |  | 0
Ships | Acquisition cost |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Ending balance |  | 4,113,754 |  | 0
Ships | Accumulated depreciation |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Ending balance |  | (425,465) |  | 0
Vehicles |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Effect of change in accounting policy |  | 11,258 |  |
Increase |  | 9,559 |  |
Depreciation |  | (7,109) |  |
Ending balance |  | 13,708 |  | 0
Vehicles | Acquisition cost |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Ending balance |  | 20,817 |  | 0
Vehicles | Accumulated depreciation |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Ending balance |  | (7,109) |  | 0
Others |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Effect of change in accounting policy | [1] | 403,346 |  |
Increase |  | 49,141 |  |
Depreciation |  | (76,030) |  |
Ending balance |  | 376,457 | [2] | 0
Others | Acquisition cost |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Ending balance |  | 2,661,850 | [2] | 0
Others | Accumulated depreciation |  |  |  |
Disclosure of quantitative information about right-of-use assets [Line Items] |  |  |  |
Beginning balance |  | 0 |  |
Ending balance |  | ₩ (2,285,393) | [2] | ₩ 0
[1] | Including transferred amount of KRW195,704 million, which was classified as finance lease assets as of December 31, 2018.
[2] | Including power purchase agreements ("PPA") with GS EPS and two other LNG combined power suppliers.

X
- Definition The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 53 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_a&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_DepreciationRightofuseAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 53 -Subparagraph j -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_j&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_RightofuseAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- References No definition available. + Details
Name: | kep_IncreaseDecreaseDueToApplicationOfIFRS16
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusAxis=ifrs-full_PropertyPlantAndEquipmentSubjectToOperatingLeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis=ifrs-full_GrossCarryingAmountMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis=ifrs-full_AccumulatedDepreciationAndAmortisationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusAxis=ifrs-full_LandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusAxis=ifrs-full_BuildingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusAxis=ifrs-full_FixturesAndFittingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusAxis=ifrs-full_MachineryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusAxis=ifrs-full_ShipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusAxis=ifrs-full_VehiclesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusAxis=ifrs-full_OtherPropertyPlantAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |