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Employment Benefits - Summary of the Fair Value of Plan Assets (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2023
Dec. 31, 2022
Disclosure of fair value of plan assets [abstract]    
Equity instruments ₩ 5,326 ₩ 171,301
Debt instruments 697,907 854,640
Bank deposits 611,821 590,103
Others [1] 2,034,426 1,533,370
Plan assets ₩ 3,349,480 ₩ 3,149,414
[1] ‘Others’ consist of various financial assets managed by external asset management companies.