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Equity - Summary of Exchange Differences on Translating Foreign Operations (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
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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)

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