v3.26.1
Equity - Summary of Capital Surplus (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2025
TWD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
TWD ($)
Disclosure of classes of share capital [abstract]      
Issuance of ordinary shares $ 18,000,371 $ 573,809 $ 16,519,296
Merger by share exchange 117,693,658 3,751,790 117,693,658
Difference between consideration and the carrying amount of the subsidiaries' net assets during actual disposal or acquisition 3,172,894 101,144 3,240,987
Exercised employee share options 4,927,511 157,077 3,706,398
Treasury share transactions 1,445,560 46,081 1,059,253
Donation from shareholders 471,894 15,043 471,894
Expired share options 651,609 20,772 647,094
Capital surplus deficit distributed as cash dividends 146,363,497 4,665,716 143,338,580
Changes in percentage of ownership interest in subsidiaries 3,510,213 111,897 40,151
Share of changes in capital surplus of associates accounted for using the equity method 42,122 1,343 26,029
Dividends that the claim period has elapsed and unclaimed by shareholders 6,274 200 6,198
Exercised disgorgement 326 10 326
Capital surplus offset deficit 3,558,935 113,450 72,704
Employee share options 4,099,596 130,685 3,325,062
Employee restricted stock awards 1,364,155 43,486 1,861,744
Others 915,533 29,185 119,172
Capital surplus for other purpose 6,379,284 203,356 5,305,978
Capital surplus $ 156,301,716 $ 4,982,522 $ 148,717,262