EARNINGS PER SHARE - Computation of Earnings Per Share Basic and Diluted (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2023	Jul. 31, 2022
Numerator for basic and diluted EPS
Net income attributable to Greif, Inc.	$ 90.3	$ 141.8	$ 291.4	$ 277.2
Cash dividends	(28.8)	(27.4)	(86.7)	(82.0)
Undistributed earnings attributable to Greif, Inc.	$ 61.5	$ 114.4	$ 204.7	$ 195.2