v2.4.0.8

Commitments And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 01, 2011 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Commitments And Contingencies [Line Items] |  |  |  |
Lease expense, net of sublease income |  | $ 38.6 | $ 38.4 | $ 37.8
Lease renewal term | 10 years |  |  |
Annual base rent plus operating expenses |  | 7.4 |  |
Additional term of lease renewal |  | 10 years |  |
Landlord reimbursements |  | 12.8 |  |
Letters of credit and bank guarantees outstanding |  | 3.6 | 3.9 |
Bank guarantees outstanding collateralized |  | 0.9 | 1.0 |
Ceiling percentage of revenue for major customer |  | 10.00% |  |
CHINA | Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | Minimum [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Ceiling percentage of revenue for major customer |  | 5.00% |  |
CHINA | Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | Maximum [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Ceiling percentage of revenue for major customer |  | 7.00% |  |
Pending or Threatened Litigation [Member] |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |
Loss contingency accrual |  | $ 4.7 |  |

X
- Definition Collateralized letters of credit outstanding + References No definition available. + Details
Name: | pmtc_CollateralizedLettersOfCreditOutstanding
Namespace Prefix: | pmtc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | pmtc_CommitmentsAndContingenciesLineItems
Namespace Prefix: | pmtc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Landlord reimbursements + References No definition available. + Details
Name: | pmtc_LandlordReimbursements
Namespace Prefix: | pmtc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Operating Lease, Additional Term + References No definition available. + Details
Name: | pmtc_OperatingLeaseAdditionalTerm
Namespace Prefix: | pmtc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Operating Leases, Rent Expense, Annual + References No definition available. + Details
Name: | pmtc_OperatingLeasesRentExpenseAnnual
Namespace Prefix: | pmtc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Term of the lessee's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LesseeLeasingArrangementsOperatingLeasesRenewalTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant