CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income		$ 126.7	$ 154.0	$ 145.3	$ 184.9
Other comprehensive income, net of tax:
Foreign currency translation	[1]	64.1	6.6	32.6	34.2
Derivative financial instruments		24.1	9.5	35.9	11.4
Minimum pension liabilities		3.4	24.4	6.5	47.1
Other comprehensive income (loss)		91.6	40.5	75.0	92.7
Comprehensive income		218.3	194.5	220.3	277.6
Comprehensive income attributable to noncontrolling interests		0.3	2.2	4.3	12.3
Comprehensive income attributable to Greif, Inc.		$ 218.0	$ 192.3	$ 216.0	$ 265.3

[1] Three and six months ended April 30, 2022 balances include $113.1 million release of foreign currency translation from business divestment.