v3.26.1
Transactions with Related Parties - Transactions with Related Parties (Parenthetical) (Detail) - KRW (₩)
₩ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of transactions between related parties [Line Items]      
Dividends paid ₩ 177,961 ₩ 232,466 ₩ 218,019
Dividends received 57,060 35,818 43,014
Handset purchanse amounting 2,277,567 2,406,342 2,340,143
Other associates [Member]      
Disclosure of transactions between related parties [Line Items]      
Dividends received 18,339 7,718 8,806
Handset purchanse amounting 25,439 13,051 15,962
Handset purchases [member]      
Disclosure of transactions between related parties [Line Items]      
Handset purchanse amounting 914,042 ₩ 964,692 ₩ 915,339
SK REIT Co., Ltd. [Member]      
Disclosure of transactions between related parties [Line Items]      
Increase decrease in lease liabilities 61,778    
Increase (decrease) in right-of-use assets 20,583    
Gains (losses) on disposals of property, plant and equipment 215,699    
Penguin Solutions Inc [Member]      
Disclosure of transactions between related parties [Line Items]      
Dividends received ₩ 15,191