ACQUISITIONS AND DIVESTITURES - Pro forma (Details) - Lee Container Acquisition - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Jan. 31, 2023	Jan. 31, 2022
Business Acquisition [Line Items]
Pro forma net sales	$ 1,288.4	$ 1,602.9
Pro forma net income attributable to Greif, Inc.	$ 102.2	$ 9.5
Class A Common Stock
Business Acquisition [Line Items]
Basic earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share)	$ 1.76	$ 0.16
Diluted earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share)	1.75	0.17
Class B Common Stock
Business Acquisition [Line Items]
Basic earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share)	2.63	0.24
Diluted earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share)	$ 2.63	$ 0.24