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Inventories - Summary of Inventories (Detail) - KRW (₩)
₩ in Millions
Dec. 31, 2022
Dec. 31, 2021
Classes of current inventories [abstract]    
Finished goods ₩ 822,177 ₩ 1,180,329
Work-in-process 1,235,363 1,202,548
Raw materials 651,602 786,739
Supplies 163,776 180,759
Inventories ₩ 2,872,918 ₩ 3,350,375