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Investments Accounted for Using the Equity Method - Summary of Aggregate Information of the Joint Venture that is Not Individually Material (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($) | Dec. 31, 2022 TWD ($)
Disclosure of joint ventures [line items] |  |  |  |
Total net income (loss) and comprehensive income (loss) | $ 47,455,215 | $ 1,447,247 | $ 37,757,210 | $ 73,250,566
Joint venture that is not individually material [member] |  |  |  |
Disclosure of joint ventures [line items] |  |  |  |
Total net income (loss) and comprehensive income (loss) | $ (3,021) | $ (92) | $ (11,214) | $ 101,839

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