v3.26.1
Investment Property - Disclosure of Detailed Information About Investment Property Explanatory (Detail) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about investment property [line items]    
Investment Property ₩ 39,841 ₩ 26,611
Beginning balance 26,611 34,812
Transfer 16,929 (5,482) [1]
Depreciation (3,699) (2,719)
Ending balance 39,841 26,611
Acquisition cost [member]    
Disclosure of detailed information about investment property [line items]    
Investment Property 69,292 49,315
Beginning balance 49,315  
Ending balance 69,292 49,315
Accumulated depreciation [member]    
Disclosure of detailed information about investment property [line items]    
Investment Property (29,451) (22,704)
Beginning balance (22,704)  
Ending balance (29,451) (22,704)
Carrying amount [member]    
Disclosure of detailed information about investment property [line items]    
Investment Property 39,841 26,611
Beginning balance 26,611  
Ending balance 39,841 26,611
Land [member]    
Disclosure of detailed information about investment property [line items]    
Investment Property 18,743 9,787
Beginning balance 9,787 14,199
Transfer 8,956 (4,412) [1]
Ending balance 18,743 9,787
Land [member] | Acquisition cost [member]    
Disclosure of detailed information about investment property [line items]    
Investment Property 18,743 9,787
Beginning balance 9,787  
Ending balance 18,743 9,787
Land [member] | Carrying amount [member]    
Disclosure of detailed information about investment property [line items]    
Investment Property 18,743 9,787
Beginning balance 9,787  
Ending balance 18,743 9,787
Buildings [member]    
Disclosure of detailed information about investment property [line items]    
Investment Property 15,465 8,029
Beginning balance 8,029 10,242
Transfer 8,708 (1,143) [1]
Depreciation (1,272) (1,070)
Ending balance 15,465 8,029
Buildings [member] | Acquisition cost [member]    
Disclosure of detailed information about investment property [line items]    
Investment Property 36,741 23,010
Beginning balance 23,010  
Ending balance 36,741 23,010
Buildings [member] | Accumulated depreciation [member]    
Disclosure of detailed information about investment property [line items]    
Investment Property (21,276) (14,981)
Beginning balance (14,981)  
Ending balance (21,276) (14,981)
Buildings [member] | Carrying amount [member]    
Disclosure of detailed information about investment property [line items]    
Investment Property 15,465 8,029
Beginning balance 8,029  
Ending balance 15,465 8,029
Right-of-use assets [member]    
Disclosure of detailed information about investment property [line items]    
Investment Property 5,633 8,795
Beginning balance 8,795 10,371
Transfer (735) 73 [1]
Depreciation (2,427) (1,649)
Ending balance 5,633 8,795
Right-of-use assets [member] | Acquisition cost [member]    
Disclosure of detailed information about investment property [line items]    
Investment Property 13,808 16,518
Beginning balance 16,518  
Ending balance 13,808 16,518
Right-of-use assets [member] | Accumulated depreciation [member]    
Disclosure of detailed information about investment property [line items]    
Investment Property (8,175) (7,723)
Beginning balance (7,723)  
Ending balance (8,175) (7,723)
Right-of-use assets [member] | Carrying amount [member]    
Disclosure of detailed information about investment property [line items]    
Investment Property 5,633 8,795
Beginning balance 8,795  
Ending balance ₩ 5,633 ₩ 8,795
[1] 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 investment property amounting to ₩1,719 million of SK m&service Co., Ltd. as assets held for sale.