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Equity - Summary of Exchange Differences on Translating Foreign Operations (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2024
TWD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
TWD ($)
Dec. 31, 2022
TWD ($)
Beginning balance $ 314,750,655   $ 313,276,385 $ 268,171,060
Exchange differences arising on translating foreign operations 12,788,423 $ 390,010 (1,536,221) 10,326,729
Share from associates and joint ventures accounted for using the equity method (18,192) (555) (28,511) (152,833)
Ending balance 342,270,913 10,438,273 314,750,655 313,276,385
Exchange differences on translating foreign operations [member]        
Beginning balance (7,034,629) (214,536) (5,529,388) (15,393,646)
Exchange differences arising on translating foreign operations 12,101,346 369,056 (1,488,920) 9,981,949
Share from associates and joint ventures accounted for using the equity method (15,711) (479) (16,321) (117,691)
Ending balance $ 5,051,006 $ 154,041 $ (7,034,629) $ (5,529,388)