XML 232 R115.htm IDEA: XBRL DOCUMENT
v3.20.1

Significant Basis Of Preparation And Accounting Policies_Estimated economic useful lives for premises and equipment except for land (Details) | 12 Months Ended
--- | ---
Dec. 31, 2019
Buildings |
Disclosure of useful life of property plant and equipment [Line Items] |
Useful lives (years) | 8 ~ 40
Structures |
Disclosure of useful life of property plant and equipment [Line Items] |
Useful lives (years) | 8 ~ 50
Machinery |
Disclosure of useful life of property plant and equipment [Line Items] |
Useful lives (years) | 2 ~ 32
Vehicles |
Disclosure of useful life of property plant and equipment [Line Items] |
Useful lives (years) | 3 ~ 8
Loaded heavy water |
Disclosure of useful life of property plant and equipment [Line Items] |
Useful lives (years) | 30
Asset retirement costs |
Disclosure of useful life of property plant and equipment [Line Items] |
Useful lives (years) | 18, 30, 40, 60
Right-of-use assets |
Disclosure of useful life of property plant and equipment [Line Items] |
Useful lives (years) | 1 ~ 32
Ships |
Disclosure of useful life of property plant and equipment [Line Items] |
Useful lives (years) | 9
Others |
Disclosure of useful life of property plant and equipment [Line Items] |
Useful lives (years) | 4 ~ 15

X
- Definition Description of useful life used for property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2019-01-01 -Paragraph 73 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_73_c&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_DescriptionOfUsefulLifePropertyPlantAndEquipment
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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

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

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

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

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=kep_LoadedHeavyWaterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=kep_RetirementsPropertyPlantAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_RightofuseAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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