XML 107 R96.htm IDEA: XBRL DOCUMENT
v3.25.3

Pension Plans - Fair Value of Plan Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Sep. 30, 2024
--- | --- | ---
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | $ 83,774 | $ 77,757
Government |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 47,554 | 48,146
Equities in Funds |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 15,709 | 9,550
Commodity Option |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 5,077 | 4,309
Insurance Company Funds |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets | [1] | 6,867 | 7,385
Cash |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 8,538 | 8,277
Options |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 29 | 90
Level 1 |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 76,907 | 70,372
Level 1 | Government |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 47,554 | 48,146
Level 1 | Equities in Funds |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 15,709 | 9,550
Level 1 | Commodity Option |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 5,077 | 4,309
Level 1 | Insurance Company Funds |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets | [1] | 0 | 0
Level 1 | Cash |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 8,538 | 8,277
Level 1 | Options |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 29 | 90
Level 2 |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 6,867 | 7,385
Level 2 | Government |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 0 | 0
Level 2 | Equities in Funds |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 0 | 0
Level 2 | Commodity Option |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 0 | 0
Level 2 | Insurance Company Funds |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets | [1] | 6,867 | 7,385
Level 2 | Cash |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 0 | 0
Level 2 | Options |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 0 | 0
Level 3 |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 0 | 0
Level 3 | Government |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 0 | 0
Level 3 | Equities in Funds |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 0 | 0
Level 3 | Commodity Option |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 0 | 0
Level 3 | Insurance Company Funds |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets | [1] | 0 | 0
Level 3 | Cash |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | 0 | 0
Level 3 | Options |  |  |
Fair Value of Plan Assets [Line Items] |  |  |
Fair value of plan assets |  | $ 0 | $ 0
[1] | These investments are comprised primarily of funds invested with an insurance company in Japan with a guaranteed rate of return. The insurance company invests these assets primarily in government and corporate bonds.

X
- Definition Fair Value of Plan Assets [Line Items] + References No definition available. + Details
Name: | ptc_FairValueOfPlanAssetsLineItems
Namespace Prefix: | ptc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (c)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (c)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (c)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (c)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 11: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 12: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_GovernmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=ptc_EquitiesInFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CommodityOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=ptc_InsuranceCompanyFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CashMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=ptc_OptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |