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Investment Properties - Summary of Income and Expenses Related to Investment Properties (Details) - KRW (₩)
₩ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Rental income from investment property, net of direct operating expense [abstract]    
Rental income ₩ 11,594 ₩ 10,519
Operating and maintenance expenses related to rental income (716) (507)
Rental income from investment property, net of direct operating expense ₩ 10,878 ₩ 10,012