CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2024	Jan. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 74.3	$ 93.1
Other comprehensive income (loss), net of tax:
Foreign currency translation	27.6	51.3
Derivative financial instruments	(36.2)	(25.7)
Minimum pension liabilities	(2.7)	(2.4)
Other comprehensive income (loss), net of tax	(11.3)	23.2
Comprehensive income	63.0	116.3
Comprehensive income attributable to noncontrolling interests	7.1	3.5
Comprehensive income attributable to Greif, Inc.	$ 55.9	$ 112.8