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Operating Segments Information - Geographic Information (Detail) - TWD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Disclosure of geographical areas [line items]    
Non-current Assets $ 2,769,301.3 $ 2,037,267.0
Taiwan [member]    
Disclosure of geographical areas [line items]    
Non-current Assets 2,510,238.7 1,953,007.7
United States [member]    
Disclosure of geographical areas [line items]    
Non-current Assets 153,137.8 41,208.7
China [member]    
Disclosure of geographical areas [line items]    
Non-current Assets 90,349.7 41,895.2
Europe, the Middle East and Africa [member]    
Disclosure of geographical areas [line items]    
Non-current Assets 140.7 143.9
Japan [member]    
Disclosure of geographical areas [line items]    
Non-current Assets 15,432.5 1,011.0
Others [member]    
Disclosure of geographical areas [line items]    
Non-current Assets $ 1.9 $ 0.5