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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, 2021
TWD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
TWD ($)
Dec. 31, 2019
TWD ($)
Investments in subsidiaries, joint ventures and associates [abstract]        
Investments in associates $ 16,500,670 $ 594,833 $ 12,335,239  
Investments in joint ventures 495,930 17,878 471,434  
Investments accounted for using the equity method $ 16,996,600 $ 612,711 $ 12,806,673 $ 12,085,207