Additional Information of Expenses by Nature - Additional Information (Detail)	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Top of range [member] \| Compensation to Directors [member]
Expense by nature [line items]
Profit sharing bonus, percentage	0.30%	0.30%
Bottom of range [member] \| Bonus to Employees [member]
Expense by nature [line items]
Profit sharing bonus, percentage	1.00%	1.00%

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.

Name:	tsm_ExpenseByNatureLineItems
Namespace Prefix:	tsm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration