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Related Party Transactions - Summary of Significant Transactions between the Company and Other Related Parties (Detail)
$ in Millions, $ in Millions
12 Months Ended
Dec. 31, 2022
TWD ($)
Dec. 31, 2021
TWD ($)
Dec. 31, 2020
TWD ($)
Dec. 31, 2022
USD ($)
Disclosure of transactions between related parties [line items]        
Receivables from related parties $ 1,584.0 $ 715.3   $ 51.5
Payables to related parties 1,642.6 1,437.2   53.4
Other receivables from related parties 69.0 61.5   $ 2.3
Global Unichip Corporation [member]        
Disclosure of transactions between related parties [line items]        
Receivables from related parties 1,471.4 597.8    
Xintec Inc. [member]        
Disclosure of transactions between related parties [line items]        
Receivables from related parties 112.6 117.5    
Payables to related parties 1,047.4 725.3    
Systems on Silicon Manufacturing Company Pte Ltd. [member]        
Disclosure of transactions between related parties [line items]        
Payables to related parties 386.0 349.2    
Other receivables from related parties 68.3 50.4    
Vanguard International Semiconductor Corporation [member]        
Disclosure of transactions between related parties [line items]        
Payables to related parties 190.6 357.2    
Other receivables from related parties 0.7 11.1    
Associates [member]        
Disclosure of transactions between related parties [line items]        
Net revenue from sale of goods 15,351.5 8,475.9 $ 8,129.8  
Purchases 6,423.9 7,569.8 7,606.4  
Contract liabilities 1,075.7 726.4    
Manufacturing expenses 6,011.5 5,459.9 $ 5,440.0  
Other related parties [member]        
Disclosure of transactions between related parties [line items]        
Payables to related parties $ 18.6 $ 5.5