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Trade and Other Payables - Summary of Other Payables (Detail) - KRW (₩)
₩ in Millions
Dec. 31, 2018
Dec. 31, 2017
Trade and other payables [abstract]    
Non-trade payables ₩ 5,191,268 ₩ 4,775,177
Accrued expenses 904,135 1,011,089
Operating deposits 819,968 850,999
Others 366,312 386,118
Less: non-current (1,510,657) (996,582)
Current ₩ 5,771,026 ₩ 6,026,801