EARNINGS PER SHARE - Computation of Earnings Per Share Basic and Diluted (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2023	Apr. 30, 2022
Numerator for basic and diluted EPS
Net income attributable to Greif, Inc.	$ 111.2	$ 125.1	$ 201.1	$ 135.4
Cash dividends	(29.0)	(27.4)	(57.9)	(54.6)
Undistributed earnings attributable to Greif, Inc.	$ 82.2	$ 97.7	$ 143.2	$ 80.8