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Additional Information of Expenses by Nature - Summary of Accrued Profit Sharing Bonus to Employees (Detail) - TWD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Bonus to Employees [member]
Expense by Nature [line items]
Accrued profit sharing bonus to employees	$ 16,358.8	$ 15,963.3

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- Definition

Accrued profit sharing bonus.

+ References

No definition available.

+ Details

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Namespace Prefix:	tsm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Definition

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.

+ References

No definition available.

+ Details

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

X

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=tsm_EmployeesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: