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Investments Accounted for Using the Equity Method - Summary of Investments Accounted for Using the Equity Method (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2024
TWD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
TWD ($)
Dec. 31, 2022
TWD ($)
Investments in subsidiaries, joint ventures and associates [abstract]        
Investments in associates $ 20,410,983 $ 622,476 $ 19,662,937  
Investments in joint venture 12,357 377 15,377  
Investments accounted for using the equity method $ 20,423,340 $ 622,853 $ 19,678,314 $ 14,679,346