Commitments and Contingencies	3 Months Ended
Dec. 31, 2021
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	15. Commitments and Contingencies As December 31, 2021 and December 31, 2020, we had letters of credit and bank guarantees outstanding of $15.3 million (of which $0.5 million was collateralized) and $16.5 million (of which $0.5 million was collateralized), respectively, primarily related to our corporate headquarters lease. Legal and Regulatory Matters Legal Proceedings With respect to legal proceedings and claims, we record an accrual for a contingency when it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated. 401(k) Plan On September 17, 2020, three individual plaintiffs filed a putative class action lawsuit against PTC, the Investment Committee for the PTC Inc. 401(k) Plan (“Plan”), and the Board of Directors (collectively, the “PTC Defendants”) in the U.S. District Court for the District of Massachusetts alleging claims regarding the Plan. Plaintiffs allege that the defendants breached their fiduciary duties under the Employee Retirement Income Security Act of 1974 ("ERISA") in the oversight of the Plan, principally by allegedly selecting and retaining certain investment options despite their higher fees and costs than other available investment options, causing participants in the Plan to pay excessive recordkeeping fees and suffer lower returns on their investments, and by allegedly failing to monitor other fiduciaries. The plaintiffs seek unspecified damages on behalf of a class of Plan participants from September 17, 2014 through the date of any judgment. The plaintiffs and the PTC Defendants reached an agreement in principle to settle the lawsuit on September 22, 2021 and filed a motion for preliminary approval on December 17, 2021. The ultimate outcome by judgment or settlement is not expected to be material to our financial position, results of operations or cash flows. Other Legal Proceedings In addition to the matters listed above, we are subject to legal proceedings and claims against us in the ordinary course of business. As of December 31, 2021, we estimate that the range of possible outcomes for such matters is immaterial and we do not believe that resolving them will have a material adverse impact on our financial condition, results of operations or cash flows. However, the results of legal proceedings cannot be predicted with certainty. Should any of these legal proceedings and claims be resolved against us, the operating results for a reporting period could be adversely affected. Guarantees and Indemnification Obligations We enter into standard indemnification agreements with our customers and business partners in the ordinary course of our business. Under such agreements, we typically indemnify, hold harmless, and agree to reimburse the indemnified party for losses suffered or incurred by the indemnified party, in connection with patent, copyright or other intellectual property infringement claims by any third party with respect to our products. Indemnification may also cover other types of claims, including claims relating to certain data breaches. Except for intellectual property infringement indemnification, the liability for which is uncapped, these agreements typically limit our liability with respect to other indemnification claims. Historically, our costs to defend lawsuits or settle claims relating to such indemnity agreements have been minimal and, accordingly, we believe the estimated fair value of liabilities under these agreements is immaterial. We warrant that our software products will perform in all material respects in accordance with our standard published specifications during the term of the license/subscription. Additionally, we generally warrant that our consulting services will be performed consistent with generally accepted industry standards and, in the case of fixed price services, the agreed-upon specifications. In most cases, liability for these warranties is capped. If necessary, we would provide for the estimated cost of product and service warranties based on specific warranty claims and claim history; however, we have not incurred significant cost under our product or services warranties. As a result, we believe the estimated fair value of these liabilities is immaterial.

Commitments and Contingencies

3 Months Ended

Dec. 31, 2021

Commitments And Contingencies Disclosure [Abstract]

15. Commitments and Contingencies

As December 31, 2021 and December 31, 2020, we had letters of credit and bank guarantees outstanding of $15.3 million (of which $0.5 million was collateralized) and $16.5 million (of which $0.5 million was collateralized), respectively, primarily related to our corporate headquarters lease.

Legal and Regulatory Matters

Legal Proceedings

With respect to legal proceedings and claims, we record an accrual for a contingency when it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated.

401(k) Plan

On September 17, 2020, three individual plaintiffs filed a putative class action lawsuit against PTC, the Investment Committee for the PTC Inc. 401(k) Plan (“Plan”), and the Board of Directors (collectively, the “PTC Defendants”) in the U.S. District Court for the District of Massachusetts alleging claims regarding the Plan. Plaintiffs allege that the defendants breached their fiduciary duties under the Employee Retirement Income Security Act of 1974 ("ERISA") in the oversight of the Plan, principally by allegedly selecting and retaining certain investment options despite their higher fees and costs than other available investment options, causing participants in the Plan to pay excessive recordkeeping fees and suffer lower returns on their investments, and by allegedly failing to monitor other fiduciaries. The plaintiffs seek unspecified damages on behalf of a class of Plan participants from September 17, 2014 through the date of any judgment. The plaintiffs and the PTC Defendants reached an agreement in principle to settle the lawsuit on September 22, 2021 and filed a motion for preliminary approval on December 17, 2021. The ultimate outcome by judgment or settlement is not expected to be material to our financial position, results of operations or cash flows.

Other Legal Proceedings

In addition to the matters listed above, we are subject to legal proceedings and claims against us in the ordinary course of business. As of December 31, 2021, we estimate that the range of possible outcomes for such matters is immaterial and we do not believe that resolving them will have a material adverse impact on our financial condition, results of operations or cash flows. However, the results of legal proceedings cannot be predicted with certainty. Should any of these legal proceedings and claims be resolved against us, the operating results for a reporting period could be adversely affected.

Guarantees and Indemnification Obligations

We enter into standard indemnification agreements with our customers and business partners in the ordinary course of our business. Under such agreements, we typically indemnify, hold harmless, and agree to reimburse the indemnified party for losses suffered or incurred by the indemnified party, in connection with patent, copyright or other intellectual property infringement claims by any third party with respect to our products. Indemnification may also cover other types of claims, including claims relating to certain data breaches. Except for intellectual property infringement indemnification, the liability for which is uncapped, these agreements typically limit our liability with respect to other indemnification claims. Historically, our costs to defend lawsuits or settle claims relating to such indemnity agreements have been minimal and, accordingly, we believe the estimated fair value of liabilities under these agreements is immaterial.

We warrant that our software products will perform in all material respects in accordance with our standard published specifications during the term of the license/subscription. Additionally, we generally warrant that our consulting services will be performed consistent with generally accepted industry standards and, in the case of fixed price services, the agreed-upon specifications. In most cases, liability for these warranties is capped. If necessary, we would provide for the estimated cost of product and service warranties based on specific warranty claims and claim history; however, we have not incurred significant cost under our product or services warranties. As a result, we believe the estimated fair value of these liabilities is immaterial.