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Employee Benefits - Maturity of Expected Benefit Payments (Detail)
₩ in Millions
Dec. 31, 2025
KRW (₩)
Disclosure of defined benefit plans [line items]  
Benefits to be paid ₩ 4,073,169
Less than 1 year [member]  
Disclosure of defined benefit plans [line items]  
Benefits to be paid 282,046
1 year - 5 years [member]  
Disclosure of defined benefit plans [line items]  
Benefits to be paid 933,451
5 years - 10 years [member]  
Disclosure of defined benefit plans [line items]  
Benefits to be paid 795,447
10 years - 20 years [member]  
Disclosure of defined benefit plans [line items]  
Benefits to be paid 1,389,605
After 20 years [member]  
Disclosure of defined benefit plans [line items]  
Benefits to be paid ₩ 672,620