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Net Defined Benefit Liabilities - Summary of Amount Recognized in the Statements of Financial Position (Detail) - KRW (₩)
₩ in Millions
Dec. 31, 2022
Dec. 31, 2021
Disclosure of net defined benefit liability (asset) [abstract]    
Present value of defined benefit obligations ₩ 2,218,655 ₩ 2,494,930
Fair value of plan assets (2,478,143) (2,314,632)
Liabilities 51,654 197,883
Assets ₩ 311,142 ₩ 17,585