Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 46.4	$ 9.3	$ 69.0	$ 58.0
Other comprehensive income (loss), net of tax:
Foreign currency translation	(27.6)	5.6	(9.6)	(109.5)
Net reclassification of cash flow hedges to earnings	0.0	0.0	0.0	0.1
Minimum pension liabilities, net	2.9	(0.9)	3.5	5.5
Other comprehensive income (loss), net of tax	(24.7)	4.7	(6.1)	(103.9)
Comprehensive income (loss)	21.7	14.0	62.9	(45.9)
Comprehensive income (loss) attributable to noncontrolling interests	(3.4)	2.8	(1.7)	(23.3)
Comprehensive income (loss) attributable to Greif, Inc.	$ 25.1	$ 11.2	$ 64.6	$ (22.6)