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Employment Benefits - Summary of Defined Benefits (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2024
Dec. 31, 2023
Surplus (deficit) in plan [abstract]    
Present value of defined benefit obligation from funded plans ₩ 4,960,645 ₩ 4,312,702
Fair value of plan assets (3,551,233) (3,349,480)
Net liabilities incurred from defined benefit plans ₩ 1,409,412 ₩ 963,222