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v3.19.1

Significant Subsequent Events - Additional Information (Detail) $ in Millions | 3 Months Ended
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Mar. 31, 2019 TWD ($)
Unqualified photoresist materials [member] |
Disclosure of non-adjusting events after reporting period [line items] |
Loss from wafer contamination Loss from water contamination | $ 3,400.0

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Preliminary estimated loss from wafer contamination. + References No definition available. + Details
Name: | tsm_LossFromWaferContamination
Namespace Prefix: | tsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=tsm_UnqualifiedPhotoresistMaterialsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |