CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Net sales	$ 1,146.5	$ 1,112.4
Cost of products sold	934.3	889.8
Gross profit	212.2	222.6
Selling, general and administrative expenses	134.3	135.4
Restructuring charges	3.1	3.3
Acquisition and integration related costs	2.0	5.1
Non-cash asset impairment charges	1.3	0.1
Loss (gain) on disposal of properties, plants and equipment, net	1.6	(0.5)
Gain on disposal of businesses, net	(0.1)	0.0
Operating profit	70.0	79.2
Interest expense, net	25.2	30.7
Non-cash pension settlement charges (income)	8.5	(0.1)
Other expense, net	0.0	1.3
Income before income tax expense and equity earnings of unconsolidated affiliates, net	36.3	47.3
Income tax expense	6.1	11.4
Equity earnings of unconsolidated affiliates, net of tax	(0.7)	(0.2)
Net income	30.9	36.1
Net income attributable to noncontrolling interests	(7.5)	(3.8)
Net income attributable to Greif, Inc.	$ 23.4	$ 32.3
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)	$ 0.40	$ 0.55
Diluted earnings per share attributable to Greif, Inc. common shareholders:
Diluted earnings per share attributable to Greif, Inc. common shareholders (usd per share)	$ 0.40	$ 0.55
Weighted-average number of common shares outstanding:
Weighted-average number of common shares outstanding, basic (shares)	26,456,071	26,260,943
Weighted-average number of common shares outstanding, diluted (shares)	26,531,403	26,414,280
Cash dividends declared per common share:
Cash dividends declared per common share (usd per share)	$ 0.44	$ 0.44
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)	0.59	0.81
Diluted earnings per share attributable to Greif, Inc. common shareholders:
Diluted earnings per share attributable to Greif, Inc. common shareholders (usd per share)	$ 0.59	$ 0.81
Weighted-average number of common shares outstanding:
Weighted-average number of common shares outstanding, basic (shares)	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
Cash dividends declared per common share:
Cash dividends declared per common share (usd per share)	$ 0.65	$ 0.65