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Property, Plant and Equipment - Additional Information (Detail) - TWD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Main plants [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated useful lives for property, plant and equipment 20 years 20 years
Mechanical and electrical power equipment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated useful lives for property, plant and equipment 10 years 10 years
Clean rooms [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Estimated useful lives for property, plant and equipment 10 years 10 years
Machinery and equipment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Reversal of impairment $ 790.7 $ 274.4