v3.26.1
Long-term Investment Securities - Details of Long-term Investment Securities (Detail) - KRW (₩)
₩ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of financial assets [line items]    
Available-for-sale financial assets ₩ 3,188,572 ₩ 1,877,922
Equity securities [member]    
Disclosure of financial assets [line items]    
FVOCI [1] 3,025,988 1,739,133
Debt securities [member]    
Disclosure of financial assets [line items]    
FVTPL ₩ 162,584 ₩ 138,789
[1] The Group designated investments in equity instruments that are not held for trading as financial assets at FVOCI.