v3.26.1
Investments in Associates and Joint Ventures - Condensed Financial Information of Material Associates (Detail) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of associates [Line Items]      
Current assets ₩ 6,727,130 ₩ 7,476,682  
Non-current assets 23,380,653 23,038,573  
Current liabilities 6,529,775 9,224,278  
Non-current liabilities 10,622,716 9,463,343  
Revenue 17,269,647 18,012,897 ₩ 17,658,877
Profit (loss) for the year 375,084 1,387,095 1,145,937
Other comprehensive income (loss) 1,529,834 160,776 (23,967)
Total comprehensive income (loss) 1,904,918 1,547,871 1,121,970
Korea IT fund [member]      
Disclosure of associates [Line Items]      
Current assets 183,750 164,128 128,344
Non-current assets 401,222 409,248 402,819
Revenue 40,134 57,110 33,017
Profit (loss) for the year 21,343 37,187 16,330
Other comprehensive income (loss) 4,232 13,006 5,316
Total comprehensive income (loss) 25,575 50,193 21,646
SK China Company Ltd. [member]      
Disclosure of associates [Line Items]      
Current assets [1] 1,787,188 1,755,237 1,350,607
Non-current assets [1] 2,120,977 1,898,657 1,987,252
Current liabilities [1] 39,402 48,662 99,083
Non-current liabilities [1] 407,230 328,485 252,100
Revenue [1] 68,245 71,870 70,126
Profit (loss) for the year [1] 42,909 55,448 87,462
Other comprehensive income (loss) [1] 239,747 (156,828) (56,660)
Total comprehensive income (loss) [1] 282,656 (101,380) 30,802
SK South East Asia Investment Pte. Ltd. [member]      
Disclosure of associates [Line Items]      
Current assets [1] 1,012,134 1,724,220 213,522
Non-current assets [1] 965,785 1,328,952 3,034,553
Current liabilities [1] 42,226 342,671 502,728
Non-current liabilities [1] 31,791 18,430 13,586
Revenue [1] 132,567 119,019 76,686
Profit (loss) for the year [1] 1,806 (54,649) (66,169)
Other comprehensive income (loss) [1] 12,323 (3,972) 2,779
Total comprehensive income (loss) [1] 14,129 ₩ (58,621) ₩ (63,390)
Rebellions Inc. [Member]      
Disclosure of associates [Line Items]      
Current assets [1],[2] 392,333    
Non-current assets [1],[2] 295,580    
Current liabilities [1],[2] 912,220    
Non-current liabilities [1],[2] 10,420    
Revenue [1],[2] 32,022    
Profit (loss) for the year [1],[2] (204,898)    
Other comprehensive income (loss) [1],[2] 219    
Total comprehensive income (loss) [1],[2] ₩ (204,679)    
[1] The financial information of SK China Company Ltd., SK South East Asia Investment Pte. Ltd. and Rebellions Inc. (Formerly, SAPEON Korea Inc.) are consolidated financial information.
[2] The financial information includes the goodwill held by Rebellions Inc. (formerly, SAPEON Korea Inc.), which was recognized as part of the identifiable net assets of the associate at the time the investment in the associate was made.