v2.4.0.8

Pension Plans (Percentage Of Total Plan Assets) (Details) | Sep. 30, 2014 | Sep. 30, 2013
--- | --- | ---
U.S. Plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Equity securities | 100.00% | 100.00%
International Plans [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Equity securities | 100.00% | 100.00%
Equity Securities [Member] | U.S. Plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Equity securities | 0.00% | 62.00%
Equity Securities [Member] | International Plans [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Equity securities | 51.00% | 51.00%
Fixed Income Securities [Member] | U.S. Plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Equity securities | 100.00% | 38.00%
Fixed Income Securities [Member] | International Plans [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Equity securities | 28.00% | 27.00%
Insurance Company [Member] | U.S. Plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Insurance company | 0.00% | 0.00%
Insurance Company [Member] | International Plans [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Insurance company | 19.00% | 19.00%
Cash [Member] | U.S. Plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Equity securities | 0.00% | 0.00%
Cash [Member] | International Plans [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Equity securities | 2.00% | 3.00%

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- Definition Defined Benefit Plans, Insurance Company Funds + References No definition available. + Details
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Namespace Prefix: | pmtc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant