XML 165 R143.htm IDEA: XBRL DOCUMENT
v3.21.1

Additional Information of Expenses by Nature - Summary of Accrued Profit Sharing Bonus to Employees (Detail) - TWD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Bonus to Employees [member] |  |  |
Expense by Nature [line items] |  |  |
Accrued profit sharing bonus to employees | $ 34,753.2 | $ 23,165.7 | $ 23,570.0

X
- Definition Accrued profit sharing bonus. + References No definition available. + Details
Name: | tsm_AccruedProfitSharingBonus
Namespace Prefix: | tsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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: |