XML 94 R74.htm IDEA: XBRL DOCUMENT
v3.25.3

POST-RETIREMENT BENEFIT PLANS - Number of Participants in Defined Benefit Plans (Details) - Pension Plan - participant | 11 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Oct. 31, 2024
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |
Active participants | 922 | 1,323
Vested former employees and deferred members | 3,274 | 3,129
Retirees and beneficiaries | 3,657 | 3,446
United States |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |
Active participants | 842 | 1,239
Vested former employees and deferred members | 2,809 | 2,672
Retirees and beneficiaries | 2,351 | 2,240
Foreign Plan |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |
Active participants | 80 | 84
Vested former employees and deferred members | 465 | 457
Retirees and beneficiaries | 1,306 | 1,206

X
- Definition Active participants in numerous defined benefit pension plans. + References No definition available. + Details
Name: | gef_ActiveParticipantsInNumerousDefinedBenefitPensionPlans
Namespace Prefix: | gef_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Pension plans, postretirement and other employee benefits. + References No definition available. + Details
Name: | gef_PensionPlansPostretirementAndOtherEmployeeBenefitsLineItems
Namespace Prefix: | gef_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Retirees and beneficiaries numerous defined benefit pension plans. + References No definition available. + Details
Name: | gef_RetireesAndBeneficiariesNumerousDefinedBenefitPensionPlans
Namespace Prefix: | gef_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Vested former employees numerous defined benefit pension plans. + References No definition available. + Details
Name: | gef_VestedFormerEmployeesNumerousDefinedBenefitPensionPlans
Namespace Prefix: | gef_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=us-gaap_ForeignPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |