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v3.21.1

Detailed information about intangible assets (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | ₩ 1,167,953 | ₩ 1,228,524 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 120,560 | 324,821 |  |
Disposal | 9,707 | 8,321 |  |
Amortization | (170,466) | (156,915) |  |
Impairment loss | (3,599) | (513,609) |  | ₩ (8,112)
Others | 49,155 | 293,453 | [1] |
Ending balance | 1,153,896 | 1,167,953 |  | 1,228,524
Intangible assets other than goodwill |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 1,069,976 | 1,225,942 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 120,371 | 229,426 |  |
Disposal | (9,707) | (8,321) |  |
Amortization | (170,466) | (156,915) |  |
Impairment loss | (3,599) | (513,609) |  |
Others | 49,155 | 293,453 | [1] |
Ending balance | 1,055,730 | 1,069,976 |  | 1,225,942
Intangible assets other than goodwill | Carrying Amount Other than Government Grants |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 1,082,811 | 1,239,036 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 120,371 | 229,426 |  |
Disposal | (9,707) | (8,321) |  |
Amortization | (172,022) | (157,952) |  |
Impairment loss | (3,599) | (513,609) |  |
Others | 50,333 | 294,231 | [1] |
Ending balance | 1,068,187 | 1,082,811 |  | 1,239,036
Intangible assets other than goodwill | Acquisition cost |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 3,597,314 | 3,069,716 |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | 3,769,026 | 3,597,314 |  | 3,069,716
Intangible assets other than goodwill | Accumulated amortization |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (1,967,732) | (1,805,784) |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | (2,138,536) | (1,967,732) |  | (1,805,784)
Intangible assets other than goodwill | Accumulated impairment [Member] |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (546,771) | (24,896) |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | (562,303) | (546,771) |  | (24,896)
Intangible assets other than goodwill | Government grants |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (12,835) | (13,094) |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 0 | 0 |  |
Disposal | 0 | 0 |  |
Amortization | 1,556 | 1,037 |  |
Impairment loss | 0 | 0 |  |
Others | (1,178) | (778) | [1] |
Ending balance | (12,457) | (12,835) |  | (13,094)
Software |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 164,760 | 157,261 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 14,101 | 42,694 |  |
Disposal | 0 | (774) |  |
Amortization | (77,402) | (81,681) |  |
Impairment loss | 0 | 0 |  |
Others | 50,568 | 47,260 | [1] |
Ending balance | 152,027 | 164,760 |  | 157,261
Software | Carrying Amount Other than Government Grants |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 164,995 | 157,681 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 14,101 | 42,694 |  |
Disposal | 0 | (774) |  |
Amortization | (77,501) | (81,883) |  |
Impairment loss | 0 | 0 |  |
Others | 50,568 | 47,277 | [1] |
Ending balance | 152,163 | 164,995 |  | 157,681
Software | Acquisition cost |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 707,731 | 619,662 |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | 775,667 | 707,731 |  | 619,662
Software | Accumulated amortization |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (542,736) | (461,981) |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | (623,504) | (542,736) |  | (461,981)
Software | Government grants |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (235) | (420) |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 0 | 0 |  |
Disposal | 0 | 0 |  |
Amortization | 99 | 202 |  |
Impairment loss | 0 | 0 |  |
Others | 0 | (17) | [1] |
Ending balance | (136) | (235) |  | (420)
Licences and franchises |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 0 | 0 |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | 0 | 0 |  | 0
Licences and franchises | Acquisition cost |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 3,398 | 3,398 |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | 547 | 3,398 |  | 3,398
Licences and franchises | Accumulated amortization |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (3,398) | (3,398) |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | (547) | (3,398) |  | (3,398)
Copyrights, patents rights and other industrial rights |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 53,261 | 67,112 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 369 | 171 |  |
Disposal | (390) | (325) |  |
Amortization | (8,352) | (9,196) |  |
Impairment loss | 0 | 0 |  |
Others | (1,972) | (4,501) | [1] |
Ending balance | 42,916 | 53,261 |  | 67,112
Copyrights, patents rights and other industrial rights | Carrying Amount Other than Government Grants |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 53,261 | 67,112 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 369 | 171 |  |
Disposal | (390) | (325) |  |
Amortization | (8,352) | (9,196) |  |
Impairment loss | 0 | 0 |  |
Others | (1,972) | (4,501) | [1] |
Ending balance | 42,916 | 53,261 |  | 67,112
Copyrights, patents rights and other industrial rights | Acquisition cost |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 102,828 | 97,033 |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | 101,866 | 102,828 |  | 97,033
Copyrights, patents rights and other industrial rights | Accumulated amortization |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (40,389) | (29,921) |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | (49,772) | (40,389) |  | (29,921)
Copyrights, patents rights and other industrial rights | Accumulated impairment [Member] |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (9,178) | 0 |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | (9,178) | (9,178) |  | 0
Mining rights |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 43,723 | 534,524 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 1,664 | 8,742 |  |
Disposal | 0 | 0 |  |
Amortization | (4,380) | (7,186) |  |
Impairment loss | 0 | (513,519) | [2] |
Others | 1,383 | 21,162 | [1] |
Ending balance | 42,390 | 43,723 |  | 534,524
Mining rights | Carrying Amount Other than Government Grants |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 43,723 | 534,524 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 1,664 | 8,742 |  |
Disposal | 0 | 0 |  |
Amortization | (4,380) | (7,186) |  |
Impairment loss | 0 | (513,519) | [2] |
Others | 1,383 | 21,162 | [1] |
Ending balance | 42,390 | 43,723 |  | 534,524
Mining rights | Acquisition cost |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 584,969 | 561,945 |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | 604,703 | 584,969 |  | 561,945
Mining rights | Accumulated amortization |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (28,456) | (27,421) |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | (34,062) | (28,456) |  | (27,421)
Mining rights | Accumulated impairment [Member] |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (512,790) | 0 |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | (528,251) | (512,790) |  | 0
Development expenditures |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 92,351 | 90,376 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 10,273 | 687 |  |
Disposal | 0 | 0 |  |
Amortization | (30,581) | (28,068) |  |
Impairment loss | 0 | (68) |  |
Others | 18,080 | 29,424 | [1] |
Ending balance | 90,123 | 92,351 |  | 90,376
Development expenditures | Carrying Amount Other than Government Grants |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 93,843 | 92,486 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 10,273 | 687 |  |
Disposal | 0 | 0 |  |
Amortization | (32,034) | (28,901) |  |
Impairment loss | 0 | (68) |  |
Others | 23,084 | 29,639 | [1] |
Ending balance | 95,166 | 93,843 |  | 92,486
Development expenditures | Acquisition cost |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 916,834 | 878,462 |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | 958,035 | 916,834 |  | 878,462
Development expenditures | Accumulated amortization |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (822,972) | (785,976) |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | (862,850) | (822,972) |  | (785,976)
Development expenditures | Accumulated impairment [Member] |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (19) | 0 |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | (19) | (19) |  | 0
Development expenditures | Government grants |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (1,492) | (2,110) |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 0 | 0 |  |
Disposal | 0 | 0 |  |
Amortization | 1,453 | 833 |  |
Impairment loss | 0 | 0 |  |
Others | (5,004) | (215) | [1] |
Ending balance | (5,043) | (1,492) |  | (2,110)
Intangible assets under development |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 49,461 | 59,972 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 53,638 | 56,082 |  |
Disposal | 0 | 0 |  |
Amortization | 0 | 0 |  |
Impairment loss | (23) | 0 |  |
Others | (43,261) | (66,593) | [1] |
Ending balance | 59,815 | 49,461 |  | 59,972
Intangible assets under development | Carrying Amount Other than Government Grants |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 60,490 | 70,536 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 53,638 | 56,082 |  |
Disposal | 0 | 0 |  |
Amortization | 0 | 0 |  |
Impairment loss | (23) | 0 |  |
Others | (47,087) | (66,128) | [1] |
Ending balance | 67,018 | 60,490 |  | 70,536
Intangible assets under development | Acquisition cost |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 73,335 | 83,381 |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | 79,862 | 73,335 |  | 83,381
Intangible assets under development | Accumulated impairment [Member] |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (12,845) | (12,845) |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | (12,844) | (12,845) |  | (12,845)
Intangible assets under development | Government grants |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (11,029) | (10,564) |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 0 | 0 |  |
Disposal | 0 | 0 |  |
Amortization | 0 | 0 |  |
Impairment loss | 0 | 0 |  |
Others | 3,826 | (465) | [1] |
Ending balance | (7,203) | (11,029) |  | (10,564)
Usage rights of donated assets and other |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 193,161 | 87,011 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 0 | 0 |  |
Disposal | 0 | 0 |  |
Amortization | (18,448) | (15,632) |  |
Impairment loss | 0 | 0 |  |
Others | 9,762 | 121,782 | [1] |
Ending balance | 184,475 | 193,161 |  | 87,011
Usage rights of donated assets and other | Carrying Amount Other than Government Grants |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 193,161 | 87,011 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 0 | 0 |  |
Disposal | 0 | 0 |  |
Amortization | (18,448) | (15,632) |  |
Impairment loss | 0 | 0 |  |
Others | 9,762 | 121,782 | [1] |
Ending balance | 184,475 | 193,161 |  | 87,011
Usage rights of donated assets and other | Acquisition cost |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 582,825 | 459,682 |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | 592,930 | 582,825 |  | 459,682
Usage rights of donated assets and other | Accumulated amortization |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (389,664) | (372,671) |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | (408,455) | (389,664) |  | (372,671)
Usage rights of donated assets and other | Government grants |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 0 | 0 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 0 | 0 |  |
Disposal | 0 | 0 |  |
Amortization | 0 | 0 |  |
Impairment loss | 0 | 0 |  |
Others | 0 | 0 | [1] |
Ending balance | 0 | 0 |  | 0
Leasehold rights |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 5,318 | 5,552 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 0 | 0 |  |
Disposal | 0 | 0 |  |
Amortization | (831) | (741) |  |
Impairment loss | 0 | 0 |  |
Others | 1,853 | 507 | [1] |
Ending balance | 6,340 | 5,318 |  | 5,552
Leasehold rights | Carrying Amount Other than Government Grants |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 5,318 | 5,552 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 0 | 0 |  |
Disposal | 0 | 0 |  |
Amortization | (831) | (741) |  |
Impairment loss | 0 | 0 |  |
Others | 1,853 | 507 | [1] |
Ending balance | 6,340 | 5,318 |  | 5,552
Leasehold rights | Acquisition cost |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 25,989 | 25,482 |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | 27,843 | 25,989 |  | 25,482
Leasehold rights | Accumulated amortization |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (20,671) | (19,930) |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | (21,503) | (20,671) |  | (19,930)
Greenhouse gas emissions rights |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 41,656 | 7,050 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 37,109 | 118,743 |  |
Disposal | (9,271) | (7,058) |  |
Amortization | 0 | 0 |  |
Impairment loss | 0 | 0 |  |
Others | (8,121) | (77,079) | [1] |
Ending balance | 61,373 | 41,656 |  | 7,050
Greenhouse gas emissions rights | Carrying Amount Other than Government Grants |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 41,656 | 7,050 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 37,109 | 118,743 |  |
Disposal | (9,271) | (7,058) |  |
Amortization | 0 | 0 |  |
Impairment loss | 0 | 0 |  |
Others | (8,121) | (77,079) | [1] |
Ending balance | 61,373 | 41,656 |  | 7,050
Greenhouse gas emissions rights | Acquisition cost |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 41,656 | 7,050 |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | 61,373 | 41,656 |  | 7,050
Others |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 426,285 | 217,084 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 3,217 | 2,307 |  |
Disposal | (46) | (164) |  |
Amortization | (30,472) | (14,411) |  |
Impairment loss | (3,576) | (22) |  |
Others | 20,863 | 221,491 | [1] |
Ending balance | 416,271 | 426,285 |  | 217,084
Others | Carrying Amount Other than Government Grants |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 426,364 | 217,084 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 3,217 | 2,307 |  |
Disposal | (46) | (164) |  |
Amortization | (30,476) | (14,413) |  |
Impairment loss | (3,576) | (22) |  |
Others | 20,863 | 221,572 | [1] |
Ending balance | 416,346 | 426,364 |  | 217,084
Others | Acquisition cost |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 557,749 | 333,621 |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | 566,200 | 557,749 |  | 333,621
Others | Accumulated amortization |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (119,446) | (104,486) |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | (137,843) | (119,446) |  | (104,486)
Others | Accumulated impairment [Member] |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (11,939) | (12,051) |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | (12,011) | (11,939) |  | (12,051)
Others | Government grants |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | (79) | 0 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 0 | 0 |  |
Disposal | 0 | 0 |  |
Amortization | 4 | 2 |  |
Impairment loss | 0 | 0 |  |
Others | 0 | (81) | [1] |
Ending balance | (75) | (79) |  | 0
Goodwill |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 97,977 | 2,582 |  |
Changes in intangible assets other than goodwill |  |  |  |
Acquisition | 189 | 95,395 |  |
Disposal | 0 | 0 |  |
Amortization | 0 | 0 |  |
Impairment loss | 0 | 0 |  |
Others | 0 | 0 | [1] |
Ending balance | 98,166 | 97,977 |  | 2,582
Goodwill | Acquisition cost |  |  |  |
Reconciliation of changes in intangible assets other than goodwill |  |  |  |
Beginning balance | 97,977 | 2,582 |  |
Changes in intangible assets other than goodwill |  |  |  |
Ending balance | ₩ 98,166 | ₩ 97,977 |  | ₩ 2,582
[1] | 'Others' include the business rights amounting to KRW172,434 million increased from the business combination between Korea East-West Power Co., Ltd. and Eumseong Natural Gas Power Co., Ltd.
[2] | KEPCO Australia Pty., Ltd. and KEPCO Bylong Australia Pty., Ltd., 100% owned subsidiaries, performed an impairment test over the mining rights and the Company recognized the amount of the carrying amount in excess of its recoverable amount as an impairment loss.

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- References No definition available. + Details
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Period Type: | duration

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- Definition The decrease in intangible assets other than goodwill resulting from disposals. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2020-01-01 -Paragraph 118 -Subparagraph e -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2020-en-r&anchor=para_118_e_ii&doctype=Standard -URIDate 2020-01-01 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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