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Trade and Other Receivables - Summary of Other Receivables (Detail) - KRW (₩)
₩ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of financial assets [line items]      
Receivables ₩ 6,095,042 ₩ 7,004,725  
Other receivables [member]      
Disclosure of financial assets [line items]      
Loans 116,082 84,148  
Receivables 1,699,608 2,540,315  
Accrued income 6,901 8,630  
Refundable deposits 350,180 352,293  
Loans receivable 150,527 105,961  
Finance lease receivables 64,047 39,726  
Others 60,416 15,560  
Less Provision for impairment (204,604) (83,680) ₩ (93,822)
Other receivables ₩ 2,243,157 ₩ 3,062,953