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Equity - Summary of Capital Surplus (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2024
TWD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
TWD ($)
Disclosure of classes of share capital [abstract]      
Issuance of ordinary shares $ 16,519,296 $ 503,791 $ 15,737,752
Merger by share exchange 117,693,658 3,589,316 117,693,658
Difference between consideration and the carrying amount of the subsidiaries' net assets during actual disposal or acquisition 3,240,987 98,841 3,240,987
Exercised employee share options 3,706,398 113,034 3,503,786
Treasury share transactions 1,059,253 32,304 679,791
Donation from shareholders 471,894 14,391 471,894
Expired share options 647,094 19,735 646,773
Capital surplus deficit distributed as cash dividends 143,338,580 4,371,412 141,974,641
Changes in percentage of ownership interest in subsidiaries 40,151 1,224 208,310
Share of changes in capital surplus of associates accounted for using the equity method 26,029 794 21,584
Dividends that the claim period has elapsed and unclaimed by shareholders 6,198 189 6,130
Exercised disgorgement 326 10 326
Capital surplus offset deficit 72,704 2,217 236,350
Employee share options 3,325,062 101,405 1,904,176
Employee restricted stock awards 1,861,744 56,778 (49,650)
Others 119,172 3,634 207,109
Capital surplus for other purpose 5,305,978 161,817 2,061,635
Capital surplus $ 148,717,262 $ 4,535,446 $ 144,272,626