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Employment Benefits - Summary of Defined Benefits (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2023
Dec. 31, 2022
Surplus (deficit) in plan [abstract]    
Present value of defined benefit obligation from funded plans ₩ 4,312,702 ₩ 3,776,715
Fair value of plan assets (3,349,480) (3,149,414)
Net liabilities incurred from defined benefit plans ₩ 963,222 ₩ 627,301