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Additional Information of Expenses by Nature - Summary of Accrued Profit Sharing Bonus to Employees (Detail) - TWD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Bonus to Employees [member]      
Expense by Nature [line items]      
Accrued profit sharing bonus to employees $ 50,090.5 $ 60,702.0 $ 35,601.5