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Guarantee Deposits - Summary of Guarantee Deposits (Detail) $ in Millions, $ in Millions | Dec. 31, 2019 TWD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 TWD ($)
--- | --- | --- | ---
Guarantee deposits [abstract] |  |  |
Capacity guarantee | $ 1,499.4 |  | $ 9,289.6
Receivables guarantee |  |  | 653.7
Others | 230.5 |  | 245.7
Guarantee deposits | 1,729.9 |  | 10,189.0
Current portion (classified under accrued expenses and other current liabilities) | 1,553.0 |  | 6,835.7
Noncurrent portion | 176.9 | $ 5.9 | 3,353.3
Guarantee deposits | $ 1,729.9 |  | $ 10,189.0

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- Definition Capacity guarantee. + References No definition available. + Details
Name: | tsm_CapacityGuarantee
Namespace Prefix: | tsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Current guarantee deposits. + References No definition available. + Details
Name: | tsm_CurrentGuaranteeDeposits
Namespace Prefix: | tsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Guarantee deposits. + References No definition available. + Details
Name: | tsm_GuaranteeDeposits
Namespace Prefix: | tsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Guarantee deposits. + References No definition available. + Details
Name: | tsm_GuaranteeDepositsAbstract
Namespace Prefix: | tsm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of non-current guarantee deposits. + References No definition available. + Details
Name: | tsm_NoncurrentGuaranteeDeposits
Namespace Prefix: | tsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Other guarantee. + References No definition available. + Details
Name: | tsm_OtherGuarantee
Namespace Prefix: | tsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Receivables guarantee. + References No definition available. + Details
Name: | tsm_ReceivablesGuarantee
Namespace Prefix: | tsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant