XML 128 R95.htm IDEA: XBRL DOCUMENT v3.25.1
Property, Plant and Equipment - Additional Information (Detail) - TWD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
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