Additional Information of Expenses by Nature - Summary of Accrued Profit Sharing Bonus to Employees (Detail) - TWD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Bonus to Employees [member]
Expense by Nature [line items]
Accrued profit sharing bonus to employees	$ 70,296.3	$ 50,090.5	$ 60,702.0

Line items represent concepts included in a table. These concepts are used to disclose the amount of expenses aggregated according to their nature (for example, depreciation, purchases of materials, transport costs, employee benefits and advertising costs), and not reallocated among functions within the entity.

No definition available.

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