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Significant Operation Losses - Additional Information (Detail) $ in Millions | 3 Months Ended
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Mar. 31, 2019 TWD ($)
Significant operation losses [line items] |
Estimated loss from unqualified photoresist materials | $ 3,400.0

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- Definition Estimated loss from unqualified photoresist materials. + References No definition available. + Details
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Namespace Prefix: | tsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Significant operation losses [line item]. + References No definition available. + Details
Name: | tsm_SignificantOperationLossesLineItems
Namespace Prefix: | tsm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration