CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Net sales	$ 1,252.6	$ 1,012.1	$ 3,362.9	$ 2,886.1
Cost of products sold	973.2	795.0	2,662.0	2,302.0
Gross profit	279.4	217.1	700.9	584.1
Selling, general and administrative expenses	138.9	99.4	377.0	305.7
Restructuring charges	9.1	3.7	20.3	13.8
Acquisition-related costs	5.8	0.5	22.2	0.7
Non-cash asset impairment charges	0.0	0.8	2.1	4.1
Gain on disposal of properties, plants and equipment, net	(1.3)	(1.4)	(7.1)	(7.5)
Loss on disposal of businesses, net	1.3	0.1	3.0	0.1
Operating profit	125.6	114.0	283.4	267.2
Interest expense, net	34.5	12.1	80.1	38.4
Non-cash pension settlement charges	0.0	0.4	0.0	0.4
Debt extinguishment charges	0.1	0.0	22.0	0.0
Other (income) expense, net	(1.1)	4.8	1.0	15.0
Income before income tax expense and equity earnings of unconsolidated affiliates, net	92.1	96.7	180.3	213.4
Income tax expense	26.8	25.7	58.3	31.2
Equity earnings of unconsolidated affiliates, net of tax	(2.2)	(1.0)	(2.4)	(1.8)
Net income	67.5	72.0	124.4	184.0
Net income attributable to noncontrolling interests	(4.8)	(4.3)	(18.4)	(14.7)
Net income attributable to Greif, Inc.	$ 62.7	$ 67.7	$ 106.0	$ 169.3
Class A Common Stock
Basic earnings per share attributable to Greif, Inc. common shareholders:
Basic earnings per share attributable to Greif, Inc. common shareholders (usd per share)	$ 1.06	$ 1.15	$ 1.80	$ 2.88
Diluted earnings per share attributable to Greif, Inc. common shareholders:
Diluted earnings per share attributable to Greif, Inc. common shareholders (usd per share)	$ 1.06	$ 1.15	$ 1.80	$ 2.88
Weighted-average number of common shares outstanding:
Weighted-average number of common shares outstanding, basic (shares)	26,257,943	25,941,279	26,166,612	25,907,423
Weighted-average number of common shares outstanding, diluted (shares)	26,257,943	25,941,279	26,166,612	25,907,423
Cash dividends declared per common share:
Cash dividends declared per common share (usd per share)	$ 0.44	$ 0.42	$ 1.32	$ 1.26
Class B Common Stock
Basic earnings per share attributable to Greif, Inc. common shareholders:
Basic earnings per share attributable to Greif, Inc. common shareholders (usd per share)	1.59	1.72	2.68	4.31
Diluted earnings per share attributable to Greif, Inc. common shareholders:
Diluted earnings per share attributable to Greif, Inc. common shareholders (usd per share)	$ 1.59	$ 1.72	$ 2.68	$ 4.31
Weighted-average number of common shares outstanding:
Weighted-average number of common shares outstanding, basic (shares)	22,000,000.0	22,000,000.0	22,000,000.0	22,000,000.0
Weighted-average number of common shares outstanding, diluted (shares)	22,000,000.0	22,000,000.0	22,000,000.0	22,000,000.0
Cash dividends declared per common share:
Cash dividends declared per common share (usd per share)	$ 0.66	$ 0.63	$ 1.97	$ 1.88