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Income Taxes - Summary of Valuation Allowance (Parentheticals) (Details) | Sep. 30, 2021 Subsidiary
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Deferred Tax Assets Net Of Valuation Allowance [Abstract] |
Number of wholly-owned subsidiaries | 2

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- Definition Number of wholly-owned subsidiaries. + References No definition available. + Details
Name: | ptc_NumberOfWhollyOwnedSubsidiaries
Namespace Prefix: | ptc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_DeferredTaxAssetsNetOfValuationAllowanceAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration