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Other Financial Assets - Summary of Other Financial Assets (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2021
Dec. 31, 2020
Other Financial Assets [Line Items]    
Current Other financial assets ₩ 1,365,603 ₩ 1,561,445
Non-Current Other financial assets 1,271,976 1,290,820
Loans and receivables    
Other Financial Assets [Line Items]    
Current Other financial assets 87,589 77,963
Non-Current Other financial assets 821,482 712,199
Loans and receivables | Gross amount    
Other Financial Assets [Line Items]    
Current Other financial assets 88,406 78,806
Non-Current Other financial assets 903,397 762,555
Loans and receivables | Allowance for doubtful accounts    
Other Financial Assets [Line Items]    
Current Other financial assets (10) (1)
Non-Current Other financial assets (52,667) (20,266)
Loans and receivables | Present value discount    
Other Financial Assets [Line Items]    
Current Other financial assets (807) (842)
Non-Current Other financial assets (29,248) (30,090)
Short-term financial instruments    
Other Financial Assets [Line Items]    
Current Other financial assets 1,278,014 1,483,482
Long-term financial instruments    
Other Financial Assets [Line Items]    
Non-Current Other financial assets ₩ 450,494 ₩ 578,621