v3.26.1
Leases - Summary of Right of Use Assets (Detail) - KRW (₩)
₩ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets ₩ 1,372,525 ₩ 1,608,219
Land, buildings and structures [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets 1,157,029 1,379,422
Others [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Right-of-use assets ₩ 215,496 ₩ 228,797