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v3.10.0.1

SUBSEQUENT EVENTS (Detail) - Argentina | 9 Months Ended
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Jul. 31, 2018
Subsequent Event [Line Items] |
Subsidiary, percent of revenue | 2.00%
Subsidiary, percent of assets | 1.00%

X
- Definition Subsidiary, Percent Of Assets + References No definition available. + Details
Name: | gef_SubsidiaryPercentOfAssets
Namespace Prefix: | gef_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Subsidiary, Percent Of Revenue + References No definition available. + Details
Name: | gef_SubsidiaryPercentOfRevenue
Namespace Prefix: | gef_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_StatementGeographicalAxis=country_AR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |