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Non-financial Liabilities (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure - Other liabilities [Line Items]      
Deferred revenue ₩ 10,356,555 ₩ 9,868,189 ₩ 9,201,538
Current      
Disclosure - Other liabilities [Line Items]      
Advances received, representing contract liabilities for performance obligations satisfied at point in time 4,157,916 3,693,043  
Unearned revenue 40,187 35,068  
Deferred revenue 659,397 625,596  
Withholdings 345,892 257,059  
Others 1,262,941 1,360,684  
Total 6,466,333 5,971,450  
Non-current      
Disclosure - Other liabilities [Line Items]      
Advances received, representing contract liabilities for performance obligations satisfied at point in time 398,056 331,596  
Unearned revenue 6,517 6,122  
Deferred revenue 9,697,158 9,242,593  
Withholdings 5,171 9,909  
Others 109,462 71,721  
Total ₩ 10,216,364 ₩ 9,661,941