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Operating Segment Information - Geographic Non-current Assets Information (Detail) - TWD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Disclosure of Geographical Areas [Line Items]    
Non-current assets $ 260,306,236 $ 207,863,887
Taiwan [member]    
Disclosure of Geographical Areas [Line Items]    
Non-current assets 158,066,796 130,812,383
Singapore [member]    
Disclosure of Geographical Areas [Line Items]    
Non-current assets 55,322,448 29,080,766
China (includes Hong Kong) [member]    
Disclosure of Geographical Areas [Line Items]    
Non-current assets 33,424,815 37,213,538
Japan [member]    
Disclosure of Geographical Areas [Line Items]    
Non-current assets 13,415,669 10,736,562
Others [member]    
Disclosure of Geographical Areas [Line Items]    
Non-current assets $ 76,508 $ 20,638