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

X

- 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

X

- References

No definition available.

+ Details

Name:	us-gaap_DeferredTaxAssetsNetOfValuationAllowanceAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration