v3.26.1
Property and Equipment - Changes in Property and Equipment (Detail) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance ₩ 12,617,394 ₩ 13,006,196
Acquisition 2,291,065 2,878,875
Disposal (187,612) (134,718)
Transfer (274,482) [1] (262,000) [2]
Depreciation (2,783,289) (2,853,793)
Impairment (1,206) (11,993)
Changes in consolidation scope   (5,173)
Other [3] 240,303  
Ending balance 11,902,173 12,617,394
Land [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 1,260,712 1,248,200
Acquisition 149 101
Disposal (32,812) (2,213)
Transfer 49,637 [1] 14,624 [2]
Changes in consolidation scope   0
Other [3] 41,574  
Ending balance 1,319,260 1,260,712
Buildings [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 765,818 773,392
Acquisition 1,953 3,785
Disposal (45,157) (1,279)
Transfer 79,349 [1] 46,479 [2]
Depreciation (59,453) (56,559)
Changes in consolidation scope   0
Other [3] 150,222  
Ending balance 892,732 765,818
Structures [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 210,987 234,879
Acquisition 1,350 1,574
Disposal (5) (78)
Transfer 8,387 [1] 13,408 [2]
Depreciation (34,893) (37,997)
Changes in consolidation scope   (799)
Other [3] 0  
Ending balance 185,826 210,987
Machinery [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 7,722,566 7,890,654
Acquisition 530,431 517,884
Disposal (9,753) (23,253)
Transfer 1,241,385 [1] 1,616,265 [2]
Depreciation (2,198,208) (2,267,720)
Impairment (381) (11,025)
Changes in consolidation scope   (239)
Other [3] 48,503  
Ending balance 7,334,543 7,722,566
Other [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 369,007 485,157
Acquisition 180,380 390,130
Disposal (5,379) (12,131)
Transfer (189,482) [1] (408,675) [2]
Depreciation (69,685) (84,179)
Impairment (561) (10)
Changes in consolidation scope   (1,285)
Other [3] 4  
Ending balance 284,284 369,007
Right-of-use assets [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 1,608,219 1,611,951
Acquisition 278,554 523,494
Disposal (90,198) (90,734)
Transfer (3,000) [1] (26,271) [2]
Depreciation (421,050) (407,338)
Impairment 0 (33)
Changes in consolidation scope   (2,850)
Other [3] 0  
Ending balance 1,372,525 1,608,219
Construction in progress [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 680,085 761,963
Acquisition 1,298,248 1,441,907
Disposal (4,308) (5,030)
Transfer (1,460,758) [1] (1,517,830) [2]
Impairment (264) (925)
Changes in consolidation scope   0
Other [3] 0  
Ending balance ₩ 513,003 ₩ 680,085
[1] The Group decided to dispose of its shareholdings in SK stoa Co., Ltd. and Media S Co., Ltd., both consolidated subsidiaries. Accordingly, property and equipment of these entities amounting to ₩13,512 million were reclassified as assets held for sale. (See note 39)
[2] The Group decided to dispose of the shares of NATE Communications Corporation (formerly, SK Communications Co., Ltd.) and SK m&service Co., Ltd., the consolidated subsidiaries, and reclassified the property and equipment amounting to ₩17,412 million of NATE Communications Corporation (formerly, SK Communications Co., Ltd.) and SK m&service Co., Ltd. as assets held for sale. (See note 39)
[3] Other changes consist of increases in assets arising from business combinations under common control. (See note 40)