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Investment Properties - Summary of Investment Properties Provided as Collateral (Detail) - Land and buildings [member] - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Deposits 1 [member]    
Disclosure of detailed information about investment property [line items]    
Carrying amount ₩ 460,166 ₩ 828,103
Secured amount ₩ 61,733 ₩ 72,910
Related account Deposits Deposits
Related amount ₩ 52,662 ₩ 63,012
Borrowings [member]    
Disclosure of detailed information about investment property [line items]    
Carrying amount 2,546 2,883
Secured amount ₩ 3,326 ₩ 3,688
Related account Borrowings Borrowings
Related amount ₩ 2,772 ₩ 2,728