v3.26.1
Earnings per Share - Summary of Basic Earnings Per Share (Detail) - KRW (₩)
₩ / shares in Units, ₩ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Basic earnings per share attributable to owners of the Parent Company:      
Profit from continuing operation attributable to owners of the Parent Company ₩ 408,410 ₩ 1,250,155 ₩ 1,093,611
Interest on hybrid bonds (note 24) ₩ (19,800) ₩ (19,800) (17,283)
Profit from continuing operation attributable to owners of the Parent Company on common shares     ₩ 1,076,328
Weighted average number of common shares outstanding     217,264,615
Discontinued operation ₩ 1,825 ₩ 5,780 ₩ 4,954
Parent Company [Member]      
Basic earnings per share attributable to owners of the Parent Company:      
Profit from continuing operation attributable to owners of the Parent Company ₩ 408,410 ₩ 1,250,155  
Interest on hybrid bonds (note 24) (19,800) (19,800)  
Profit from continuing operation attributable to owners of the Parent Company on common shares ₩ 388,610 ₩ 1,230,355 ₩ 1,076,328
Weighted average number of common shares outstanding 212,953,061 212,848,138