CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions		12 Months Ended
		Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income		$ 394.0	$ 413.2	$ 124.3
Other comprehensive income (loss), net of tax:
Foreign currency translation	[1]	(27.9)	(1.6)	(9.8)
Derivative financial instruments		76.4	21.1	(12.0)
Minimum pension liabilities		(1.1)	50.4	15.1
Other comprehensive income (loss), net of tax		47.4	69.9	(6.7)
Comprehensive income		441.4	483.1	117.6
Comprehensive income attributable to noncontrolling interests		10.5	21.4	2.6
Comprehensive income attributable to Greif, Inc.		$ 430.9	$ 461.7	$ 115.0

[1] Year ended October 31, 2022 amount includes $113.1 million release of foreign currency translation from business divestment.