Document and Entity Information (USD $)	12 Months Ended
	Sep. 30, 2012	Nov. 18, 2013	Mar. 30, 2013
Entity Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Sep. 30, 2013
Entity Registrant Name	PTC Inc.
Entity Central Index Key	0000857005
Current Fiscal Year End Date	--09-30
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	FY
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 3,018,836,651
Entity Common Stock, Shares Outstanding		119,494,574