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v3.26.1

Goodwill and Other Intangible Assets, Net - Changes in Carrying Amount of Goodwill and Other Intangible Assets (Detail) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Beginning | ₩ 4,774,824 | ₩ 4,714,784
Acquisitions | 602,985 | 510,934
Business combination | 554,875 | 282
Disposals | (5,942) | (106,453)
Amortization | (465,935) | (453,689)
Impairment loss | (51,618) | (47,873)
Others | 84,340 | 156,839
Ending | 5,493,529 | 4,774,824
Goodwill [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Beginning | 357,851 | 403,172
Acquisitions | 0 | 0
Business combination | 466,537 | 282
Disposals | (461) | 0
Amortization | 0 | 0
Impairment loss | 0 | (46,958)
Others | 2,845 | 1,355
Ending | 826,772 | 357,851
Intellectual property rights [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Beginning | 3,247,517 | 3,029,651
Acquisitions | 377,414 | 353,175
Business combination | 0 | 0
Disposals | (4) | (240)
Amortization | (289,446) | (272,730)
Impairment loss | (30,426) | 0
Others | 70,603 | 137,661
Ending | 3,375,658 | 3,247,517
Memberships [Member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Beginning | 136,108 | 138,184
Acquisitions | 7,243 | 1,716
Business combination | 0 | 0
Disposals | (4,892) | (4,179)
Amortization | (238) | (180)
Impairment loss | (519) | 29
Others | 1,536 | 538
Ending | 139,238 | 136,108
Development expense [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Beginning | 95,041 | 126,818
Acquisitions | 12,089 | 15,913
Business combination | 0 | 0
Disposals | 0 | (22)
Amortization | (50,481) | (63,684)
Impairment loss | (6,124) | (692)
Others | 150,228 | 16,708
Ending | 200,753 | 95,041
Port facilities usage rights [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Beginning | 167,996 | 182,411
Acquisitions | 0 | 0
Business combination | 0 | 0
Disposals | 0 | 0
Amortization | (14,844) | (14,415)
Impairment loss | 0 | 0
Others | 0 | 0
Ending | 153,152 | 167,996
Exploration and evaluation assets [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Beginning | 115,309 | 163,446
Acquisitions | 44,097 | 21,024
Business combination | 0 | 0
Disposals | (22) | 0
Amortization | 0 | 0
Impairment loss | (14,548) | 0
Others | 2,177 | (69,161)
Ending | 147,013 | 115,309
Development assets [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Beginning | 86,711 | 10,235
Acquisitions | 0 | 543
Business combination | 0 | 0
Disposals | 0 | 0
Amortization | 0 | (76)
Impairment loss | 0 | 0
Others | (3,370) | 76,009
Ending | 83,341 | 86,711
Customer relationships [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Beginning | 145,699 | 196,895
Acquisitions | 0 | 0
Business combination | 0 | 0
Disposals | 0 | 0
Amortization | (42,068) | (44,478)
Impairment loss | 0 | 0
Others | 12,615 | (6,718)
Ending | 116,246 | 145,699
Other intangible assets [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Beginning | 422,592 | 463,972
Acquisitions | 162,142 | 118,563
Business combination | 88,338 | 0
Disposals | (563) | (102,012)
Amortization | (68,858) | (58,126)
Impairment loss | (1) | (252)
Others | (152,294) | 447
Ending | ₩ 451,356 | ₩ 422,592

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