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Document and Entity Information	6 Months Ended
	Apr. 30, 2013	Jun. 03, 2013 Class A Common Stock [Member]	Jun. 03, 2013 Class B Common Stock [Member]
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Trading Symbol	GEF
Entity Registrant Name	GREIF INC
Entity Central Index Key	0000043920
Current Fiscal Year End Date	--10-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		25,424,424	22,119,966

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