v3.26.1
Equity - Summary of Non-controlling Interests (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2025
TWD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
TWD ($)
Dec. 31, 2023
TWD ($)
Beginning balance $ 342,270,913   $ 314,750,655 $ 313,276,385
Share of profit for the year 1,180,685 $ 37,637 1,437,974 1,849,952
Other comprehensive income (loss) for the year        
Exchange difference on translating foreign operations (5,275,665) (168,175) 12,788,423 (1,536,221)
Share in other comprehensive income (loss) from associates accounted for using the equity method 37,442 1,194 (18,192) (28,511)
Non-controlling interest arising from capital increase of subsidiaries     177,487  
Ending balance 368,629,100 11,751,006 342,270,913 314,750,655
Non-controlling interests [member]        
Beginning balance 22,244,661 709,106 20,270,547 18,608,124
Share of profit for the year 1,180,685 37,637 1,437,974 1,849,952
Other comprehensive income (loss) for the year        
Exchange difference on translating foreign operations (58,098) (1,852) 687,077 (47,301)
Unrealized gain (loss) on equity instruments at FVTOCI (3,354) (107) 6,599 26,560
Gain (loss) from hedging (252,210) (8,040) 124,336 (69,189)
Remeasurement on defined benefit plans 14,186 452 3,270 (15,876)
Share in other comprehensive income (loss) from associates accounted for using the equity method 9,814 313 (7,157) (7,514)
Non-controlling interests arising from acquisition of subsidiaries 27,315 871 0 0
Acquisition of non-controlling interests in subsidiaries 22,335 712 0 0
Decrease in non-controlling interests arising from disposal of subsidiary (2,184) (70) 0 (295,895)
Non-controlling interest arising from capital increase of subsidiaries 0 0 177,487 427,913
The Group's subscription for subsidiaries' capital increase at a percentage different from its existing ownership 0 0 69,141 0
Cash dividends distributed to non-controlling interests (514,157) (16,390) (593,390) (912,261)
Non-controlling interest relating to outstanding vested employee share options granted by subsidiaries 578,048 18,427 238,183 293,740
Repurchase of outstanding shares by subsidiaries (Note 31) (313,843) (10,004) (270,291) 0
Non-controlling interest arising from exercised convertible bonds issued by subsidiaries 3,241,783 103,340 0 0
Equity component of convertible bonds issued by subsidiaries 272,167 8,676 100,885 412,294
Ending balance $ 26,447,148 $ 843,071 $ 22,244,661 $ 20,270,547