Document and Entity Information	6 Months Ended
	Apr. 04, 2015	May 07, 2015	Sep. 30, 2014
Entity Information [Line Items]
Common Stock, Shares, Outstanding	114,985,000		115,025,000
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 04, 2015
Entity Registrant Name	PTC Inc.
Entity Central Index Key	0000857005
Current Fiscal Year End Date	--09-30
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		114,986,644