Equity Incentive Plans - Schedule of Restricted Stock Unit Grants for the Period (Parenthetical) (Details) shares in Thousands	12 Months Ended
	Sep. 30, 2023 Installment shares
Performance-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Granted, shares	69	[1]
Number of equal annual installments | Installment	3
Performance-Based Restricted Stock Units | Maximum Two Times | Maximum | Catch-Up Provision
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of RSUs	two times
Service-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, shares	1,530	[2]
Number of equal annual installments | Installment	3
TSR Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, shares	69	[3]
TSR Units | Maximum | Catch-Up Provision
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of number of RSUs	100.00%
TSR Units | Maximum Two Times | Maximum | Catch-Up Provision
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of RSUs	two times

[1] The performance-based RSUs are primarily made up of RSUs granted to our executives and are eligible to vest based upon annual performance measures over a three-year period. To the extent earned, those performance-based RSUs will vest in three substantially equal installments on November 15, 2023, November 15, 2024, and November 15, 2025, or the date the Compensation Committee determines the extent to which the applicable performance criteria have been achieved for each performance period. Up to a maximum of two times the number of RSUs can be earned.

[2] The service-based RSUs were granted to employees, including our executive officers. Substantially all service-based RSUs will vest in three substantially equal annual installments on or about the anniversary of the date of grant.

[3] The rTSR RSUs were granted to our executives and are eligible to vest based on the performance of PTC stock relative to the stock performance of an index of PTC peer companies established as of the grant date, as determined at the end of the measurement period ending on September 30, 2025. The RSUs earned will vest on November 15, 2025. Up to a maximum of two times the number of rTSR RSUs eligible to be earned for the period may vest. If the stock price as of the beginning of the period is below the stock price at the end of the period, a maximum of 100% of the rTSR RSUs may vest.