Commitments and Contingencies	9 Months Ended
Jul. 02, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal and Regulatory Matters Korean Tax Audit In July 2016, we received an assessment from the tax authorities in Korea related to an ongoing tax audit of approximately $12 million. See Note 12. Income Taxes for additional information. China Investigation The China Administration for Industry and Commerce (the “Agency”) recently initiated an investigation at our China subsidiary related to the investigation concerning expenditures by our business partners in China and our China business that we recently settled with the U.S. Securities and Exchange Commission (“SEC”) and the U.S. Department of Justice (“DOJ”), but not necessarily limited to the scope of that investigation. The Agency is authorized to issue fines and assess other civil penalties. We are unable to predict the outcome of this matter, which could include fines or other sanctions that could be material. Legal Proceedings On March 7, 2016, a lawsuit was filed against us and certain of our current and former officers and directors in the U.S. District Court for the District of Massachusetts by a shareholder on behalf of himself and purportedly on behalf of other shareholders who purchased our stock during the period November 24, 2011 through July 29, 2015. An amended complaint was filed on July 11, 2016. The lawsuit, which seeks unspecified damages, alleges that, during that period, PTC’s public disclosures concerning the SEC and DOJ investigation described above were false and/or misleading and/or failed to disclose certain alleged facts. We intend to contest the action vigorously. We cannot predict the outcome of this action nor when it will be resolved. If the plaintiff(s) were to prevail in the litigation, we could be liable for damages, which could be material and could adversely affect our financial condition or results of operations. We are subject to various other legal proceedings and claims that arise in the ordinary course of business. We do not believe that resolving the legal proceedings and claims that we are currently subject to 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 particular reporting period could be adversely affected. Accruals 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. For legal proceedings and claims for which the likelihood that a liability has been incurred is more than remote but less than probable, we estimate the range of possible outcomes. As of July 2, 2016, we had a legal proceedings and claims accrual of $0.4 million. Guarantees and Indemnification Obligations We enter into standard indemnification agreements in the ordinary course of our business. Pursuant to such agreements with our business partners or customers, we indemnify, hold harmless, and agree to reimburse the indemnified party for losses suffered or incurred by the indemnified party, generally in connection with patent, copyright or other intellectual property infringement claims by any third party with respect to our products, as well as claims relating to property damage or personal injury resulting from the performance of services by us or our subcontractors. The maximum potential amount of future payments we could be required to make under these indemnification agreements is unlimited. Historically, our costs to defend lawsuits or settle claims relating to such indemnity agreements have been minimal and we accordingly 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 in effect at the time of delivery of the licensed products for a specified period of time. Additionally, we generally warrant that our consulting services will be performed consistent with generally accepted industry standards. 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

Legal and Regulatory Matters

Korean Tax Audit

In July 2016, we received an assessment from the tax authorities in Korea related to an ongoing tax audit of approximately $12 million. See Note 12. Income Taxes for additional information.

China Investigation

The China Administration for Industry and Commerce (the “Agency”) recently initiated an investigation at our China subsidiary related to the investigation concerning expenditures by our business partners in China and our China business that we recently settled with the U.S. Securities and Exchange Commission (“SEC”) and the U.S. Department of Justice (“DOJ”), but not necessarily limited to the scope of that investigation. The Agency is authorized to issue fines and assess other civil penalties. We are unable to predict the outcome of this matter, which could include fines or other sanctions that could be material.

Legal Proceedings

On March 7, 2016, a lawsuit was filed against us and certain of our current and former officers and directors in the U.S. District Court for the District of Massachusetts by a shareholder on behalf of himself and purportedly on behalf of other shareholders who purchased our stock during the period November 24, 2011 through July 29, 2015. An amended complaint was filed on July 11, 2016. The lawsuit, which seeks unspecified damages, alleges that, during that period, PTC’s public disclosures concerning the SEC and DOJ investigation described above were false and/or misleading and/or failed to disclose certain alleged facts. We intend to contest the action vigorously. We cannot predict the outcome of this action nor when it will be resolved. If the plaintiff(s) were to prevail in the litigation, we could be liable for damages, which could be material and could adversely affect our financial condition or results of operations.

We are subject to various other legal proceedings and claims that arise in the ordinary course of business. We do not believe that resolving the legal proceedings and claims that we are currently subject to 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 particular reporting period could be adversely affected.

Accruals

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. For legal proceedings and claims for which the likelihood that a liability has been incurred is more than remote but less than probable, we estimate the range of possible outcomes. As of July 2, 2016, we had a legal proceedings and claims accrual of $0.4 million.

Guarantees and Indemnification Obligations

We enter into standard indemnification agreements in the ordinary course of our business. Pursuant to such agreements with our business partners or customers, we indemnify, hold harmless, and agree to reimburse the indemnified party for losses suffered or incurred by the indemnified party, generally in connection with patent, copyright or other intellectual property infringement claims by any third party with respect to our products, as well as claims relating to property damage or personal injury resulting from the performance of services by us or our subcontractors. The maximum potential amount of future payments we could be required to make under these indemnification agreements is unlimited. Historically, our costs to defend lawsuits or settle claims relating to such indemnity agreements have been minimal and we accordingly 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 in effect at the time of delivery of the licensed products for a specified period of time. Additionally, we generally warrant that our consulting services will be performed consistent with generally accepted industry standards. 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.