v3.26.1
Profit Before Income Tax - Summary of Other Gains and Losses (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2025
TWD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
TWD ($)
Dec. 31, 2023
TWD ($)
Analysis of income and expense [abstract]        
Net gain on financial assets mandatorily at FVTPL $ 6,722,811 $ 214,307 $ 11,726,761 $ 6,155,995
Net loss arising on financial instruments held for trading (6,301,411) (200,874) (1,908,202) (4,295,484)
Gain on disposal of subsidiary (Note 30) 0 0 0 529,721
Foreign exchange gain (loss), net 3,427,874 109,272 (5,538,433) 998,111
Gain on bargain purchase (Note 29) 0 0 76,715 0
Impairment loss on investments accounted for using the equity method (Note 14) (12,107) (386) (42,143) 0
Gain on disposal of investments accounted for using the equity method (Note 14) 15,310 488 20,952 55,795
Others (80,415) (2,563) 14,342 0
Other gains and losses $ 3,772,062 $ 120,244 $ 4,349,992 $ 3,444,138