CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Net sales	$ 1,213.3	$ 968.3	$ 2,110.3	$ 1,874.0
Cost of products sold	964.6	773.0	1,688.8	1,507.0
Gross profit	248.7	195.3	421.5	367.0
Selling, general and administrative expenses	140.0	102.7	238.1	206.3
Restructuring charges	7.5	6.0	11.2	10.1
Acquisition-related costs	13.8	0.0	16.4	0.2
Non-cash asset impairment charges	0.0	0.4	2.1	3.3
Gain on disposal of properties, plants and equipment, net	(4.9)	(1.5)	(5.8)	(6.1)
Loss on disposal of businesses, net	1.7	0.0	1.7	0.0
Operating profit	90.6	87.7	157.8	153.2
Interest expense, net	33.9	13.0	45.6	26.3
Debt extinguishment charges	21.9	0.0	21.9	0.0
Other expense, net	2.3	2.5	2.1	10.2
Income before income tax expense and equity earnings of unconsolidated affiliates, net	32.5	72.2	88.2	116.7
Income tax expense (benefit)	11.5	21.1	31.5	5.5
Equity earnings of unconsolidated affiliates, net of tax	(0.1)	(0.8)	(0.2)	(0.8)
Net income	21.1	51.9	56.9	112.0
Net income attributable to noncontrolling interests	(7.5)	(6.8)	(13.6)	(10.4)
Net income attributable to Greif, Inc.	$ 13.6	$ 45.1	$ 43.3	$ 101.6
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)	$ 0.23	$ 0.77	$ 0.74	$ 1.73
Diluted earnings per share attributable to Greif, Inc. common shareholders:
Diluted earnings per share attributable to Greif, Inc. common shareholders (usd per share)	$ 0.23	$ 0.77	$ 0.74	$ 1.73
Weighted-average number of common shares outstanding:
Weighted-average number of common shares outstanding, basic (shares)	26,250,460	25,934,680	26,120,946	25,890,495
Weighted-average number of common shares outstanding, diluted (shares)	26,255,112	25,934,680	26,122,080	25,890,495
Cash dividends declared per common share:
Cash dividends declared per common share (usd per share)	$ 0.44	$ 0.42	$ 0.88	$ 0.84
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)	0.34	1.14	1.09	2.58
Diluted earnings per share attributable to Greif, Inc. common shareholders:
Diluted earnings per share attributable to Greif, Inc. common shareholders (usd per share)	$ 0.34	$ 1.14	$ 1.09	$ 2.58
Weighted-average number of common shares outstanding:
Weighted-average number of common shares outstanding, basic (shares)	22,000,000	22,000,000	22,000,000	22,000,000
Weighted-average number of common shares outstanding, diluted (shares)	22,000,000	22,000,000	22,000,000	22,000,000
Cash dividends declared per common share:
Cash dividends declared per common share (usd per share)	$ 0.66	$ 0.63	$ 1.31	$ 1.25