Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 32.5	$ 20.5	$ 22.6	$ 48.7
Other comprehensive income (loss), net of tax:
Foreign currency translation	46.3	(40.5)	18.0	(115.1)
Net reclassification of cash flow hedges to earnings				0.1
Minimum pension liabilities, net	(1.3)	0.9	0.6	6.4
Other comprehensive income (loss), net of tax	45.0	(39.6)	18.6	(108.6)
Comprehensive income (loss)	77.5	(19.1)	41.2	(59.9)
Comprehensive income (loss) attributable to noncontrolling interests	4.1	(10.1)	1.7	(26.1)
Comprehensive income (loss) attributable to Greif, Inc.	$ 73.4	$ (9.0)	$ 39.5	$ (33.8)