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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
Dec. 31, 2022
TWD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
TWD ($)
Dec. 31, 2020
TWD ($)
Disclosure of joint ventures [line items]        
Net income $ 64,618,094 $ 2,102,770 $ 62,249,997 $ 28,651,900
Other comprehensive income 8,632,472 280,913 406,016 495,313
Total comprehensive income 73,250,566 2,383,683 62,656,013 29,147,213
Joint venture that is not individually material [member]        
Disclosure of joint ventures [line items]        
Net income 101,839 3,314 27,003 1,780
Other comprehensive income       3,881
Total comprehensive income $ 101,839 $ 3,314 $ 27,003 $ 5,661