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Finance Income and Costs - Details of Finance Income and Costs (Detail) - KRW (₩)
₩ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Finance Income:      
Interest income ₩ 58,472 ₩ 36,708 ₩ 37,030
Gain on sale of accounts receivable — other 1,043 27,725 22,605
Dividends 2,552 12,039 1,170
Gain on foreign currency transactions 21,283 10,987 9,029
Gain on foreign currency translations 2,095 10,753 8,928
Gain relating to financial instruments at FVTPL 94,393 60,169 62,963
Finance income 179,838 155,133 140,685
Finance Costs:      
Interest expense 328,307 342,342 399,176
Loss on sale of accounts receivable — other 61,841 0 0
Loss on foreign currency transactions 19,485 12,270 11,053
Loss on foreign currency translations 3,814 8,005 12,730
Loss on disposal of long-term investment securities 0 0 98
Loss relating to financial instruments at FVTPL 41,597 16,833 13,847
Loss on disposal of investment assets 1,283 0 0
Finance costs 456,327 315,604 322,943
Parent Company [Member]      
Finance Income:      
Gain on foreign currency translations 2,095 7,505 7,888
Finance income 179,838 202,550 241,196
Finance Costs:      
Interest expense 328,307 279,737 288,972
Loss on foreign currency translations 3,814 6,764 8,973
Finance costs ₩ 456,327 ₩ 585,427 ₩ 497,193