Collateralized letters of credit outstanding

No definition available.

Name:	ptc_CollateralizedLettersOfCreditOutstanding
Namespace Prefix:	ptc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Plaintiffs claim.

+ References

No definition available.

+ Details

Name:	ptc_PlaintiffsClaim
Namespace Prefix:	ptc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Estimated amount of loss resulting from an adverse tax position.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (d)(3)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Identifies the domicile or jurisdiction of the court of law, arbitration or mediation proceeding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

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-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

States the date the complaint was formally filed in a court of law, in arbitration or mediation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
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-Paragraph 4
-Subparagraph (a)
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of plaintiffs that have filed claims pertaining to a loss contingency.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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Period Type:

- Details

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Commitments and Contingencies - Additional Information (Details) $ in Millions	1 Months Ended	12 Months Ended
	Jul. 31, 2016 USD ($)	Sep. 30, 2020 USD ($) Plantiff	Sep. 30, 2019 USD ($)
Loss Contingencies [Line Items]
Letters of credit and bank guarantees outstanding		$ 16.4	$ 15.1
Bank guarantees outstanding collateralized		$ 0.5	$ 1.1
Putative Class Action
Loss Contingencies [Line Items]
Lawsuit filing date		September 17, 2020
Number of plaintiffs \| Plantiff		3
Lawsuit action domicile		U.S. District Court for the District of Massachusetts
Plaintiffs claim		The plaintiffs seek unspecified damages on behalf of a class of Plan participants from September 17, 2014 through the date of any judgment.
Korea
Loss Contingencies [Line Items]
Income tax examination, estimate of possible loss	$ 12.0	$ 17.0