CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 18.6	$ 30.9
Other comprehensive (loss) income, net of tax:
Foreign currency translation	(31.5)	27.6
Derivative financial instruments	11.8	1.9
Minimum pension liabilities	3.1	22.7
Other comprehensive (loss) income, net of tax	(16.6)	52.2
Comprehensive income	2.0	83.1
Comprehensive income attributable to noncontrolling interests	4.0	10.1
Comprehensive (loss) income attributable to Greif, Inc.	$ (2.0)	$ 73.0