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Finance Costs - Summary of Finance Costs (Detail)
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2023
TWD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
TWD ($)
Dec. 31, 2021
TWD ($)
Disclosure of detailed information about borrowings [line items]        
Interest expense, Corporate bonds $ 17,848.9   $ 14,116.1 $ 5,203.0
Lease liabilities 382.0   267.1 193.3
Interest expense, Bank loans 95.4   32.0 17.6
Interest expense, Others 2.8   1.7 0.3
Less: Capitalized interest under property, plant and equipment (6,329.7)   (2,666.9) 0.0
Finance costs $ 11,999.4 $ 391.9 $ 11,750.0 $ 5,414.2
Bottom of range [member]        
Disclosure of detailed information about borrowings [line items]        
Capitalisation rate 1.08% 1.08% 0.56%  
Top of range [member]        
Disclosure of detailed information about borrowings [line items]        
Capitalisation rate 3.36% 3.36% 3.36%