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Notes and Accounts Receivable, Net - Aging Analysis of Notes and Accounts Receivable, Net (Detail)
$ in Millions, $ in Millions
Dec. 31, 2022
TWD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
TWD ($)
Dec. 31, 2020
TWD ($)
Dec. 31, 2019
TWD ($)
Disclosure of financial assets [line items]          
Notes and accounts receivable, net $ 229,755.9 $ 7,476.6 $ 197,586.1    
Less: Loss allowance (331.6)   (347.0) $ (246.6) $ (325.3)
Allowance for credit losses [member]          
Disclosure of financial assets [line items]          
Less: Loss allowance (331.6)   (347.0)    
Not past due [member]          
Disclosure of financial assets [line items]          
Notes and accounts receivable, net 205,053.1   191,740.0    
Past due [member] | Past due within 30 days [member]          
Disclosure of financial assets [line items]          
Notes and accounts receivable, net 24,516.3   6,186.8    
Past due [member] | Past due over 31 days [member]          
Disclosure of financial assets [line items]          
Notes and accounts receivable, net $ 518.1   $ 6.3