XML 164 R148.htm IDEA: XBRL DOCUMENT
v3.21.1

Property, Plant and Equipment (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Changes in property and equipment [Line Items] |  |  |
Beginning balance | ₩ 164,701,827 | ₩ 152,743,194 |
Effect of change in accounting policy | 0 | 4,947,947 |
Acquisitions | 13,593,937 | 14,221,355 |
Disposals | (685,326) | (964,308) |
Depreciation | (11,376,100) | (10,966,756) |
Impairment | (72,607) | (50,036) | [1],[2]
Others | 2,547,656 | 4,770,431 | [3],[4]
Ending balance | 168,709,387 | 164,701,827 |
Land |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 13,826,246 | 13,532,324 |
Ending balance | 13,919,851 | 13,826,246 |
Land | Carrying Amount Other than Government Grants [Member] |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 13,848,063 | 13,554,292 |
Effect of change in accounting policy | 0 | 0 |
Acquisitions | 5,330 | 40,752 |
Disposals | (31,304) | (29,205) |
Depreciation | (273) | 0 |
Impairment | 0 | (25,626) | [1],[2]
Others | 121,510 | 307,850 | [3],[4]
Ending balance | 13,943,326 | 13,848,063 |
Land | Acquisition cost |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 13,848,063 | 13,554,292 |
Ending balance | 13,970,098 | 13,848,063 |
Land | Accumulated depreciation |  |  |
Changes in property and equipment [Line Items] |  |  |
Ending balance | (26,772) |  |
Land | Government grants |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (21,817) | (21,968) |
Effect of change in accounting policy | 0 | 0 |
Acquisitions | 0 | 0 |
Disposals | 2 | 151 |
Depreciation | 0 | 0 |
Impairment | 0 | 0 | [1],[2]
Others | (1,660) | 0 | [3],[4]
Ending balance | (23,475) | (21,817) |
Buildings |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 12,383,786 | 11,870,502 |
Ending balance | 12,559,301 | 12,383,786 |
Buildings | Carrying Amount Other than Government Grants [Member] |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 12,445,706 | 11,933,691 |
Effect of change in accounting policy | 0 | 0 |
Acquisitions | 7,225 | 3,195 |
Disposals | (16,015) | (23,409) |
Depreciation | (875,680) | (821,680) |
Impairment | (2,107) | (1,293) | [1],[2]
Others | 1,057,403 | 1,355,202 | [3],[4]
Ending balance | 12,616,532 | 12,445,706 |
Buildings | Acquisition cost |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 20,756,351 | 19,431,536 |
Ending balance | 21,773,824 | 20,756,351 |
Buildings | Accumulated depreciation |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (8,305,683) | (7,494,176) |
Ending balance | (9,150,218) | (8,305,683) |
Buildings | Accumulated impairment losses |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (4,962) | (3,669) |
Ending balance | (7,074) | (4,962) |
Buildings | Government grants |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (61,920) | (63,189) |
Effect of change in accounting policy | 0 | 0 |
Acquisitions | 0 | (592) |
Disposals | 0 | 0 |
Depreciation | 5,206 | 6,214 |
Impairment | 0 | 0 | [1],[2]
Others | (517) | (4,353) | [3],[4]
Ending balance | (57,231) | (61,920) |
Structures |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 44,992,316 | 42,520,941 |
Ending balance | 46,078,846 | 44,992,316 |
Structures | Carrying Amount Other than Government Grants [Member] |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 45,178,870 | 42,711,795 |
Effect of change in accounting policy |  | 0 |
Acquisitions | 36,091 | 1,663 |
Disposals | (346,612) | (470,230) |
Depreciation | (2,313,920) | (2,399,283) |
Impairment | (3,571) | (1,234) | [1],[2]
Others | 3,707,997 | 5,336,159 | [3],[4]
Ending balance | 46,258,855 | 45,178,870 |
Structures | Acquisition cost |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 70,900,343 | 66,335,506 |
Ending balance | 74,136,523 | 70,900,343 |
Structures | Accumulated depreciation |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (25,711,840) | (23,615,312) |
Ending balance | (27,864,461) | (25,711,840) |
Structures | Accumulated impairment losses |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (9,633) | (8,339) |
Ending balance | (13,207) | (9,633) |
Structures | Government grants |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (186,554) | (190,854) |
Effect of change in accounting policy |  | 0 |
Acquisitions |  | 0 |
Disposals | 2,032 | 2,405 |
Depreciation | 9,526 | 9,373 |
Impairment | 0 | 0 | [1],[2]
Others | (5,013) | (7,478) | [3],[4]
Ending balance | (180,009) | (186,554) |
Machinery |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 49,748,393 | 47,283,353 |
Ending balance | 49,881,002 | 49,748,393 |
Machinery | Carrying Amount Other than Government Grants [Member] |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 49,907,300 | 47,456,595 |
Effect of change in accounting policy | 0 | 0 |
Acquisitions | 407,521 | 326,606 |
Disposals | (283,845) | (248,951) |
Depreciation | (5,526,816) | (5,452,669) |
Impairment | (74,362) | (12,247) | [1],[2]
Others | 5,608,989 | 7,837,966 | [3],[4]
Ending balance | 50,038,787 | 49,907,300 |
Machinery | Acquisition cost |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 89,224,339 | 82,047,823 |
Ending balance | 94,295,027 | 89,224,339 |
Machinery | Accumulated depreciation |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (38,865,392) | (34,151,878) |
Ending balance | (43,740,838) | (38,865,392) |
Machinery | Accumulated impairment losses |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (451,647) | (439,350) |
Ending balance | (515,402) | (451,647) |
Machinery | Government grants |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (158,907) | (173,242) |
Effect of change in accounting policy | 0 | 0 |
Acquisitions | 0 | (1,050) |
Disposals | 496 | 635 |
Depreciation | 17,468 | 17,993 |
Impairment | 0 | 0 | [1],[2]
Others | (16,842) | (3,243) | [3],[4]
Ending balance | (157,785) | (158,907) |
Ships |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 201 | 302 |
Ending balance | 255 | 201 |
Ships | Carrying Amount Other than Government Grants [Member] |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 201 | 302 |
Effect of change in accounting policy | 0 | 0 |
Acquisitions | 0 | 0 |
Disposals | 0 | 0 |
Depreciation | (106) | (100) |
Impairment | 0 | 0 | [1],[2]
Others | 160 | (1) | [3],[4]
Ending balance | 255 | 201 |
Ships | Acquisition cost |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 3,104 | 3,655 |
Ending balance | 2,482 | 3,104 |
Ships | Accumulated depreciation |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (2,903) | (3,353) |
Ending balance | (2,227) | (2,903) |
Vehicles |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 68,310 | 67,969 |
Ending balance | 78,351 | 68,310 |
Vehicles | Carrying Amount Other than Government Grants [Member] |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 70,585 | 72,189 |
Effect of change in accounting policy | 0 | 0 |
Acquisitions | 3,880 | 3,789 |
Disposals | (151) | 4,558 |
Depreciation | (35,036) | (33,650) |
Impairment | 0 | 0 | [1],[2]
Others | 39,705 | 23,699 | [3],[4]
Ending balance | 78,983 | 70,585 |
Vehicles | Acquisition cost |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 309,829 | 287,954 |
Ending balance | 338,386 | 309,829 |
Vehicles | Accumulated depreciation |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (239,128) | (215,649) |
Ending balance | (259,288) | (239,128) |
Vehicles | Accumulated impairment losses |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (116) | (116) |
Ending balance | (115) | (116) |
Vehicles | Government grants |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (2,275) | (4,220) |
Effect of change in accounting policy | 0 | 0 |
Acquisitions | 0 | (228) |
Disposals | 4 | 5 |
Depreciation | 2,064 | 2,170 |
Impairment | 0 | 0 | [1],[2]
Others | (425) | (2) | [3],[4]
Ending balance | (632) | (2,275) |
Equipment |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 373,874 | 382,441 |
Ending balance | 407,616 | 373,874 |
Equipment | Carrying Amount Other than Government Grants [Member] |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 374,115 | 382,859 |
Effect of change in accounting policy | 0 | 0 |
Acquisitions | 72,655 | 47,532 |
Disposals | (86) | (162) |
Depreciation | (186,004) | (199,376) |
Impairment | 0 | (227) | [1],[2]
Others | 147,163 | 143,489 | [3],[4]
Ending balance | 407,843 | 374,115 |
Equipment | Acquisition cost |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 1,716,210 | 1,558,309 |
Ending balance | 1,895,528 | 1,716,210 |
Equipment | Accumulated depreciation |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (1,342,053) | (1,175,408) |
Ending balance | (1,487,643) | (1,342,053) |
Equipment | Accumulated impairment losses |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (42) | (42) |
Ending balance | (42) | (42) |
Equipment | Government grants |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (241) | (418) |
Effect of change in accounting policy | 0 | 0 |
Acquisitions | 0 | (81) |
Disposals | 0 | 0 |
Depreciation | 149 | 262 |
Impairment | 0 | 0 | [1],[2]
Others | (135) | (4) | [3],[4]
Ending balance | (227) | (241) |
Tools |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 163,661 | 192,000 |
Ending balance | 192,148 | 163,661 |
Tools | Carrying Amount Other than Government Grants [Member] |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 164,064 | 192,675 |
Effect of change in accounting policy | 0 | 0 |
Acquisitions | 28,048 | 20,956 |
Disposals | (193) | (31) |
Depreciation | (82,862) | (87,708) |
Impairment | 0 | 0 | [1],[2]
Others | 83,330 | 38,172 | [3],[4]
Ending balance | 192,387 | 164,064 |
Tools | Acquisition cost |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 1,098,127 | 1,073,145 |
Ending balance | 1,195,721 | 1,098,127 |
Tools | Accumulated depreciation |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (934,023) | (880,432) |
Ending balance | (1,003,295) | (934,023) |
Tools | Accumulated impairment losses |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (40) | (38) |
Ending balance | (39) | (40) |
Tools | Government grants |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (403) | (675) |
Effect of change in accounting policy | 0 | 0 |
Acquisitions | 0 | 0 |
Disposals | 0 | 0 |
Depreciation | 243 | 281 |
Impairment | 0 | 0 | [1],[2]
Others | (79) | (9) | [3],[4]
Ending balance | (239) | (403) |
Construction in progress |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 28,358,259 | 28,766,427 |
Ending balance | 30,869,001 | 28,358,259 |
Construction in progress | Carrying Amount Other than Government Grants [Member] |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 28,419,470 | 28,821,167 |
Effect of change in accounting policy | 0 | 0 |
Acquisitions | 12,726,469 | 13,544,091 |
Disposals | (486) | (199,853) |
Depreciation | 0 | 0 |
Impairment | 7,799 | (8,828) | [1],[2]
Others | (10,189,527) | (13,737,107) | [3],[4]
Ending balance | 30,963,725 | 28,419,470 |
Construction in progress | Acquisition cost |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 28,584,806 | 29,026,880 |
Ending balance | 31,121,255 | 28,584,806 |
Construction in progress | Accumulated impairment losses |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (165,336) | (205,713) |
Ending balance | (157,530) | (165,336) |
Construction in progress | Government grants |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (61,211) | (54,740) |
Effect of change in accounting policy | 0 | 0 |
Acquisitions | 8,783 | 12,338 |
Disposals | 0 | 0 |
Depreciation | 0 | 0 |
Impairment | 0 | 0 | [1],[2]
Others | (26,698) | (18,809) | [3],[4]
Ending balance | (79,126) | (61,211) |
Finance lease assets |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 0 | 195,704 |
Ending balance | 0 | 0 |
Finance lease assets | Carrying Amount Other than Government Grants [Member] |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 0 | 195,730 |
Effect of change in accounting policy | 0 | (195,730) |
Acquisitions | 0 | 0 |
Disposals | 0 | 0 |
Depreciation | 0 | 0 |
Impairment | 0 | 0 | [1],[2]
Others | 0 | 0 | [3],[4]
Ending balance | 0 | 0 |
Finance lease assets | Acquisition cost |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 0 | 2,390,701 |
Ending balance |  | 0 |
Finance lease assets | Accumulated depreciation |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 0 | (2,194,971) |
Ending balance | 0 | 0 |
Finance lease assets | Government grants |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 0 | (26) |
Effect of change in accounting policy | 0 | 26 |
Acquisitions | 0 | 0 |
Disposals | 0 | 0 |
Depreciation | 0 | 0 |
Impairment | 0 | 0 | [1],[2]
Others | 0 | 0 | [3],[4]
Ending balance | 0 | 0 |
Right-of-use assets |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 4,783,573 | 0 |
Ending balance | 4,542,166 | 4,783,573 |
Right-of-use assets | Carrying Amount Other than Government Grants [Member] |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 4,783,573 | 0 |
Effect of change in accounting policy | 0 | 5,143,651 |
Acquisitions | 291,334 | 220,996 |
Disposals | (827) | 0 |
Depreciation | (586,254) | (581,074) |
Impairment | 0 | 0 | [1],[2]
Others | 54,340 | 0 | [3],[4]
Ending balance | 4,542,166 | 4,783,573 |
Right-of-use assets | Acquisition cost |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 7,574,010 | 0 |
Ending balance | 7,905,214 | 7,574,010 |
Right-of-use assets | Accumulated depreciation |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (2,790,437) | 0 |
Ending balance | (3,363,048) | (2,790,437) |
Retirements, property, plant and equipment |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 7,374,527 | 5,571,754 |
Ending balance | 7,413,171 | 7,374,527 |
Retirements, property, plant and equipment | Carrying Amount Other than Government Grants [Member] |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 7,374,527 | 5,571,754 |
Effect of change in accounting policy | 0 | 0 |
Acquisitions | 131 | 0 |
Disposals | (196) | 0 |
Depreciation | (819,708) | (626,856) |
Impairment | 0 | 0 | [1],[2]
Others | 858,417 | 2,429,629 | [3],[4]
Ending balance | 7,413,171 | 7,374,527 |
Retirements, property, plant and equipment | Acquisition cost |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 11,690,188 | 9,424,181 |
Ending balance | 12,260,732 | 11,690,188 |
Retirements, property, plant and equipment | Accumulated depreciation |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (4,169,238) | (3,706,004) |
Ending balance | (4,701,138) | (4,169,238) |
Retirements, property, plant and equipment | Accumulated impairment losses |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (146,423) | (146,423) |
Ending balance | (146,423) | (146,423) |
Other property, plant and equipment |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 2,628,681 | 2,359,477 |
Ending balance | 2,752,081 | 2,628,681 |
Other property, plant and equipment | Carrying Amount Other than Government Grants [Member] |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 2,628,681 | 2,359,477 |
Effect of change in accounting policy | 0 | 0 |
Acquisitions | 6,470 | 1,388 |
Disposals | (8,145) | (221) |
Depreciation | (984,097) | (800,653) |
Impairment | (366) | (581) | [1],[2]
Others | 1,109,538 | 1,069,271 | [3],[4]
Ending balance | 2,752,081 | 2,628,681 |
Other property, plant and equipment | Acquisition cost |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | 12,955,782 | 11,875,394 |
Ending balance | 13,979,980 | 12,955,782 |
Other property, plant and equipment | Accumulated depreciation |  |  |
Changes in property and equipment [Line Items] |  |  |
Beginning balance | (10,327,101) | (9,515,917) |
Ending balance | ₩ (11,227,899) | ₩ (10,327,101) |
[1] | As described in Note 2, the Company recognized impairment loss of KRW3,819 million related to Wolsong unit 1, Shin-Hanul unit 3 & 4 and reversal of impairment loss of KRW16,693 million related to Wolsong unit 1.
[2] | KEPCO Bylong Australia Pty., Ltd., 100% owned subsidiary, performed an impairment test over its land and others. The Company recognized the amount of the carrying amount in excess of its recoverable amount as an impairment loss.
[3] | 'Others' include the amounts of assets acquired by the business combination. (see Note 51)
[4] | 'Others' include the amounts reclassified from construction-in-progress to other assets during the prior year relating to the assets which became usable two years before but were considered immaterial.

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_DisclosureOfPropertyPlantAndEquipmentLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The increase (decrease) in property, plant and equipment resulting from changes that the entity does not separately disclose in the same statement or note. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2020-01-01 -Paragraph 73 -Subparagraph e -Clause ix -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_73_e_ix&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_IncreaseDecreaseThroughOtherChangesPropertyPlantAndEquipment
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount recognised resulting from the write-down of property, plant and equipment to its recoverable amount or reversals of those write-downs. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 98 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_98_a&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_WritedownsReversalsOfPropertyPlantAndEquipment
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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_DepreciationPropertyPlantAndEquipmentGovermentGrantsConsideration
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | kep_DisposalsAndRetirementsPropertyPlantAndEquipmentGovernmentGrantsConsideration
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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
- References No definition available. + Details
Name: | kep_PropertyPlantAndEquipmentGovernmentGrantsConsideration
Namespace Prefix: | kep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

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

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

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

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

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

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