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Finance Costs - Summary of Finance Costs (Detail)
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2022
TWD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
TWD ($)
Dec. 31, 2020
TWD ($)
Disclosure of detailed information about borrowings [line items]        
Interest expense, Corporate bonds $ 14,116.1   $ 5,203.0 $ 1,337.3
Lease liabilities 267.1   193.3 227.8
Interest expense, Bank loans 32.0   17.6 500.9
Interest expense, Others 1.7   0.3 15.5
Less: Capitalized interest under property, plant and equipment (2,666.9)   0.0 0.0
Finance costs $ 11,750.0 $ 382.4 $ 5,414.2 $ 2,081.5
Bottom of range [member]        
Disclosure of detailed information about borrowings [line items]        
Capitalisation rate 0.56% 0.56%    
Top of range [member]        
Disclosure of detailed information about borrowings [line items]        
Capitalisation rate 3.36% 3.36%