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RESTRUCTURING CHARGES - Reconciliation of Beginning and Ending Restructuring Reserve Balances (Details) $ in Millions	3 Months Ended
	Jan. 31, 2025 USD ($)
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 4.9
Costs incurred and charged to expense	2.7
Costs paid or otherwise settled	(2.7)
Restructuring reserve, ending balance	4.9
Employee Separation Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	4.8
Costs incurred and charged to expense	2.0
Costs paid or otherwise settled	(2.2)
Restructuring reserve, ending balance	4.6
Other Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0.1
Costs incurred and charged to expense	0.7
Costs paid or otherwise settled	(0.5)
Restructuring reserve, ending balance	$ 0.3

X

- Definition

Restructuring reserve settled with cash or otherwise settled.

+ References

No definition available.

+ Details

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Namespace Prefix:	gef_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4.b.2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482017/420-10-50-1

+ Details

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Period Type:	instant

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Details

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- Details

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