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Intangible Assets other than Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2022
Disclosure of detailed information about intangible assets [abstract] |
Summary of Intangible Asset Explanatory |
(1) | Intangible assets as of December 31, 2021 and 2022 are as follows:
|  |  |  |  | 2021 |
|  |  |  |  | Acquisition cost |  |  | Government grants |  |  | Accumulated amortization |  |  | Accumulated impairment losses |  |  | Book value |
|  |  |  |  | In millions of won |
Software |  | ￦ |  |  |  |  | 867,185 |  |  |  | (91 | ) |  |  | (704,589 | ) |  |  | — |  |  |  | 162,505 |
Copyrights, patents rights and other industrial rights |  |  |  |  |  |  | 103,428 |  |  |  | — |  |  |  | (59,063 | ) |  |  | (9,178 | ) |  |  | 35,187 |
Mining rights |  |  |  |  |  |  | 623,122 |  |  |  | — |  |  |  | (39,803 | ) |  |  | (541,417 | ) |  |  | 41,902 |
Development expenditures |  |  |  |  |  |  | 978,768 |  |  |  | (3,820 | ) |  |  | (905,805 | ) |  |  | (19 | ) |  |  | 69,124 |
Intangible assets under development |  |  |  |  |  |  | 94,275 |  |  |  | (7,326 | ) |  |  | — |  |  |  | (12,845 | ) |  |  | 74,104 |
Usage rights of donated assets and others |  |  |  |  |  |  | 592,870 |  |  |  | — |  |  |  | (423,087 | ) |  |  | — |  |  |  | 169,783 |
Leasehold rights |  |  |  |  |  |  | 28,185 |  |  |  | — |  |  |  | (22,337 | ) |  |  | — |  |  |  | 5,848 |
Greenhouse gas emissions rights |  |  |  |  |  |  | 78,137 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 78,137 |
Others |  |  |  |  |  |  | 574,957 |  |  |  | (71 | ) |  |  | (155,404 | ) |  |  | (11,995 | ) |  |  | 407,487 |
|  | ￦ |  |  |  |  | 3,940,927 |  |  |  | (11,308 | ) |  |  | (2,310,088 | ) |  |  | (575,454 | ) |  |  | 1,044,077 |
|  |  |  |  | 2022 |
|  |  |  |  | Acquisition cost |  |  | Government grants |  |  | Accumulated amortization |  |  | Accumulated impairment losses |  |  | Book value |
|  |  |  |  | In millions of won |
Software |  | ￦ |  |  |  |  | 1,002,040 |  |  |  | (174 | ) |  |  | (799,013 | ) |  |  | (20 | ) |  |  | 202,833 |
Copyrights, patents rights and other industrial rights |  |  |  |  |  |  | 104,559 |  |  |  | — |  |  |  | (67,368 | ) |  |  | (9,178 | ) |  |  | 28,013 |
Mining rights |  |  |  |  |  |  | 625,845 |  |  |  | — |  |  |  | (46,187 | ) |  |  | (541,133 | ) |  |  | 38,525 |
Development expenditures |  |  |  |  |  |  | 938,032 |  |  |  | (3,477 | ) |  |  | (883,527 | ) |  |  | — |  |  |  | 51,028 |
Intangible assets under development |  |  |  |  |  |  | 76,625 |  |  |  | (2,108 | ) |  |  | — |  |  |  | (8,903 | ) |  |  | 65,614 |
Usage rights of donated assets and others |  |  |  |  |  |  | 592,797 |  |  |  | — |  |  |  | (435,518 | ) |  |  | (136 | ) |  |  | 157,143 |
Leasehold rights |  |  |  |  |  |  | 28,185 |  |  |  | — |  |  |  | (23,297 | ) |  |  | — |  |  |  | 4,888 |
Greenhouse gas emissions rights |  |  |  |  |  |  | 43,960 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 43,960 |
Others |  |  |  |  |  |  | 551,396 |  |  |  | (67 | ) |  |  | (174,714 | ) |  |  | (11,955 | ) |  |  | 364,660 |
|  | ￦ |  |  |  |  | 3,963,439 |  |  |  | (5,826 | ) |  |  | (2,429,624 | ) |  |  | (571,325 | ) |  |  | 956,664 |
Summary of Changes in Intangible Assets |
(2) | Changes in intangible assets for the years ended December 31, 2021 and 2022 are as follows:
|  |  |  |  | 2021 |
|  |  |  |  | Beginning balance |  |  | Acquisition |  |  | Disposal |  |  | Amortization |  |  | Reversal |  |  | Others |  |  | Ending balance |
|  |  |  |  | In millions of won |
Software |  | ￦ |  |  |  |  | 152,163 |  |  |  | 18,834 |  |  |  | (1 | ) |  |  | (77,881 | ) |  |  | — |  |  |  | 69,481 |  |  |  | 162,596 |
(Government grants) |  |  |  |  |  |  | (136 | ) |  |  | — |  |  |  | — |  |  |  | 64 |  |  |  | — |  |  |  | (19 | ) |  |  | (91 | )
Copyrights, patents rights and other industrial rights |  |  |  |  |  |  | 42,916 |  |  |  | 166 |  |  |  | (131 | ) |  |  | (7,771 | ) |  |  | — |  |  |  | 7 |  |  |  | 35,187 |
Mining rights |  |  |  |  |  |  | 42,390 |  |  |  | 1,022 |  |  |  | — |  |  |  | (3,526 | ) |  |  | — |  |  |  | 2,016 |  |  |  | 41,902 |
Development expenditures |  |  |  |  |  |  | 95,166 |  |  |  | 309 |  |  |  | — |  |  |  | (37,033 | ) |  |  | — |  |  |  | 14,502 |  |  |  | 72,944 |
(Government grants) |  |  |  |  |  |  | (5,043 | ) |  |  | — |  |  |  | — |  |  |  | 1,439 |  |  |  | — |  |  |  | (216 | ) |  |  | (3,820 | )
Intangible assets under development |  |  |  |  |  |  | 67,018 |  |  |  | 51,988 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (37,576 | ) |  |  | 81,430 |
(Government grants) |  |  |  |  |  |  | (7,203 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (123 | ) |  |  | (7,326 | )
Usage rights of donated assets and others |  |  |  |  |  |  | 184,475 |  |  |  | — |  |  |  | — |  |  |  | (13,594 | ) |  |  | — |  |  |  | (1,098 | ) |  |  | 169,783 |
Leasehold rights |  |  |  |  |  |  | 6,340 |  |  |  | — |  |  |  | — |  |  |  | (834 | ) |  |  | — |  |  |  | 342 |  |  |  | 5,848 |
Greenhouse gas emissions rights |  |  |  |  |  |  | 61,373 |  |  |  | 78,091 |  |  |  | — |  |  |  | (31 | ) |  |  | — |  |  |  | (61,296 | ) |  |  | 78,137 |
Others |  |  |  |  |  |  | 416,346 |  |  |  | 2,229 |  |  |  | — |  |  |  | (26,998 | ) |  |  | 14 |  |  |  | 15,967 |  |  |  | 407,558 |
(Government grants) |  |  |  |  |  |  | (75 | ) |  |  | — |  |  |  | — |  |  |  | 4 |  |  |  | — |  |  |  | — |  |  |  | (71 | )
|  | ￦ |  |  |  |  | 1,055,730 |  |  |  | 152,639 |  |  |  | (132 | ) |  |  | (166,161 | ) |  |  | 14 |  |  |  | 1,987 |  |  |  | 1,044,077 |
|  |  |  |  | 2022 |
|  |  |  |  | Beginning balance |  |  | Acquisition |  |  | Disposal |  |  | Amortization |  |  | Impairment |  |  | Others |  |  | Ending balance |
|  |  |  |  | In millions of won |
Software |  | ￦ |  |  |  |  | 162,596 |  |  |  | 22,532 |  |  |  | (57 | ) |  |  | (84,649 | ) |  |  | — |  |  |  | 102,585 |  |  |  | 203,007 |
(Government grants) |  |  |  |  |  |  | (91 | ) |  |  | — |  |  |  | — |  |  |  | 60 |  |  |  | — |  |  |  | (143 | ) |  |  | (174 | )
Copyrights, patents rights and other industrial rights |  |  |  |  |  |  | 35,187 |  |  |  | 270 |  |  |  | (37 | ) |  |  | (7,136 | ) |  |  | — |  |  |  | (271 | ) |  |  | 28,013 |
Mining rights |  |  |  |  |  |  | 41,902 |  |  |  | 2,395 |  |  |  | — |  |  |  | (4,296 | ) |  |  | — |  |  |  | (1,476 | ) |  |  | 38,525 |
Development expenditures |  |  |  |  |  |  | 72,944 |  |  |  | — |  |  |  | — |  |  |  | (24,238 | ) |  |  | — |  |  |  | 5,799 |  |  |  | 54,505 |
(Government grants) |  |  |  |  |  |  | (3,820 | ) |  |  | — |  |  |  | — |  |  |  | 1,466 |  |  |  | — |  |  |  | (1,123 | ) |  |  | (3,477 | )
Intangible assets under development |  |  |  |  |  |  | 81,430 |  |  |  | 39,559 |  |  |  | — |  |  |  | — |  |  |  | (14 | ) |  |  | (53,253 | ) |  |  | 67,722 |
(Government grants) |  |  |  |  |  |  | (7,326 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 5,218 |  |  |  | (2,108 | )
Usage rights of donated assets and others |  |  |  |  |  |  | 169,783 |  |  |  | — |  |  |  | — |  |  |  | (11,394 | ) |  |  | (150 | ) |  |  | (1,096 | ) |  |  | 157,143 |
Leasehold rights |  |  |  |  |  |  | 5,848 |  |  |  | — |  |  |  | — |  |  |  | (960 | ) |  |  | — |  |  |  | — |  |  |  | 4,888 |
Greenhouse gas emissions rights |  |  |  |  |  |  | 78,137 |  |  |  | 57,466 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (91,643 | ) |  |  | 43,960 |
Others |  |  |  |  |  |  | 407,558 |  |  |  | 4,073 |  |  |  | (260 | ) |  |  | (25,017 | ) |  |  | — |  |  |  | (21,627 | ) |  |  | 364,727 |
(Government grants) |  |  |  |  |  |  | (71 | ) |  |  | — |  |  |  | — |  |  |  | 4 |  |  |  | — |  |  |  | — |  |  |  | (67 | )
|  | ￦ |  |  |  |  | 1,044,077 |  |  |  | 126,295 |  |  |  | (354 | ) |  |  | (156,160 | ) |  |  | (164 | ) |  |  | (57,030 | ) |  |  | 956,664 |
Summary of Significant Specific Intangible Assets |
(3) | Significant specific intangible assets as of December 31, 2021 and 2022 are as follows:
2021
Type |  | Description |  | Currency |  | Amount |  |  | Remaining useful lives
|  | In millions of won and thousands of Australian dollars
Software |  | DAS MS-SQL CORE license |  | KRW |  |  | 3,817 |  |  | 2 years and 8 months
Copyrights, patents rights and other industrial rights |  | Smart technology verification and standard design project conducting right |  | KRW |  |  | 1,851 |  |  | 9 months
|  | Contributions to AP R NRC DC |  | KRW |  |  | 25,045 |  |  | 6 years
Mining rights |  | Mining rights of Bylong mine |  | AUD |  |  | — |  |  | — (*)
Usage rights of donated assets and others |  | Sejong Haengbogdosi sharing charge |  | KRW |  |  | 22,310 |  |  | 4 years and 11 months
|  | Right of use electricity and gas supply facility (Community district of Songdo) |  | KRW |  |  | 8,962 |  |  | 8 years and 6 months
Others |  | Occupancy and use of public waters |  | KRW |  |  | 81,623 |  |  | 15 years and 1 month
|  | Greenhouse gas emissions rights |  | KRW |  |  | 78,137 |  |  | —
|  | Business rights |  | KRW |  |  | 160,459 |  |  | 27 years and 11 months
(*)   The carrying amount of mining rights is nil, because KEPCO Australia Pty., Ltd. and KEPCO Bylong Australia Pty., Ltd. had recognized impairment losses in full.
2022
Type |  | Description |  | Currency |  | Amount |  |  | Remaining useful lives
|  | In millions of won and thousands of Australian dollars
Software |  | ORACLE license for SDIS integrated DB |  | KRW |  |  | 5,509 |  |  | 3 years and 4 months
Copyrights, patents rights and other industrial rights |  | Contributions to APR NRC DC |  | KRW |  |  | 20,871 |  |  | 5 years
Mining rights |  | Mining rights of Bylong mine |  | AUD |  |  | — |  |  | — (*)
Usage rights of donated assets and others |  | Sejong Haengbogdosi sharing charge |  | KRW |  |  | 17,772 |  |  | 3 years and 11 months
|  | Right of use electricity and gas supply facility (Community district of Songdo) |  | KRW |  |  | 7,908 |  |  | 7 years and 6 months
Others |  | Occupancy and use of public waters |  | KRW |  |  | 76,212 |  |  | 14 years and 1 month
|  | Greenhouse gas emissions rights |  | KRW |  |  | 43,960 |  |  | —
|  | Business rights |  | KRW |  |  | 154,712 |  |  | 26 years and 11 months
(*) | The carrying amount of mining rights is nil, because KEPCO Australia Pty., Ltd. and KEPCO Bylong Australia Pty., Ltd. had recognized impairment losses in full.
Summary of Recognized Research and Development Expenses |
(4) | For the years ended December 31, 2020, 2021 and 2022, the Company recognized research and development expenses of ￦ 700,642 million, ￦ 689,397 million and ￦ 727,810 million, respectively.

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