CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY (UNAUDITED) - USD ($) shares in Thousands, $ in Millions	Total		Executive	Directors	Greif, Inc. Equity	Greif, Inc. Equity Executive	Greif, Inc. Equity Directors	Capital Stock	Capital Stock Executive	Capital Stock Directors	Treasury Stock	Treasury Stock Executive	Treasury Stock Directors	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Non controlling interests
Beginning balance (in shares) at Oct. 31, 2020								48,450
Beginning balance at Oct. 31, 2020	$ 1,200.7				$ 1,152.2			$ 170.2			$ (134.4)			$ 1,543.9	$ (427.5)	$ 48.5
Beginning balance (in shares) at Oct. 31, 2020											28,392
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	303.3				286.2									286.2		17.1
Other comprehensive income (loss):
Foreign currency translation	18.7	[1]			17.9										17.9	0.8
Derivative financial instruments, net of income tax expense/benefit	10.8				10.8										10.8
Minimum pension liability adjustment, net of income tax expense/benefit	49.3				49.3										49.3
Comprehensive income	382.1				364.2
Current period mark to redemption value of redeemable noncontrolling interest	2.2				2.2									2.2
Net income allocated to redeemable noncontrolling interests	(1.4)															(1.4)
Dividends paid to Greif, Inc. shareholders	(78.4)				(78.4)									(78.4)
Dividends paid to noncontrolling interests and other	(6.4)															(6.4)
Long-term incentive shares issued (in shares)								80			(80)
Long-term incentive shares issued	4.1				4.1			$ 3.9			$ 0.2
Share based compensation	3.2				3.2			$ 3.2
Restricted stock (in shares)									3	26		3	26
Restricted stock			$ 0.1	$ 1.3		$ 0.1	$ 1.3		$ 0.1	$ 1.2			$ 0.1
Ending balance (in shares) at Jul. 31, 2021								48,559
Ending balance at Jul. 31, 2021	1,507.5				1,448.9			$ 178.6			$ (134.1)			1,753.9	(349.5)	58.6
Ending balance (in shares) at Jul. 31, 2021											28,283
Beginning balance (in shares) at Apr. 30, 2021								48,559
Beginning balance at Apr. 30, 2021	1,429.7				1,374.2			$ 177.6			$ (134.1)			1,666.1	(335.4)	55.5
Beginning balance (in shares) at Apr. 30, 2021											28,283
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	118.4				113.0									113.0		5.4
Other comprehensive income (loss):
Foreign currency translation	(15.5)	[1]			(15.7)										(15.7)	0.2
Derivative financial instruments, net of income tax expense/benefit	(0.6)				(0.6)										(0.6)
Minimum pension liability adjustment, net of income tax expense/benefit	2.2				2.2										2.2
Comprehensive income	104.5				98.9
Current period mark to redemption value of redeemable noncontrolling interest	1.0				1.0									1.0
Net income allocated to redeemable noncontrolling interests	(0.6)															(0.6)
Dividends paid to Greif, Inc. shareholders	(26.2)				(26.2)									(26.2)
Dividends paid to noncontrolling interests and other	(1.9)															(1.9)
Share based compensation	1.0				1.0			$ 1.0
Ending balance (in shares) at Jul. 31, 2021								48,559
Ending balance at Jul. 31, 2021	1,507.5				1,448.9			$ 178.6			$ (134.1)			1,753.9	(349.5)	58.6
Ending balance (in shares) at Jul. 31, 2021											28,283
Beginning balance (in shares) at Oct. 31, 2021								48,559
Beginning balance at Oct. 31, 2021	1,575.6				1,514.3			$ 179.3			$ (134.1)			1,825.6	(356.5)	61.3
Beginning balance (in shares) at Oct. 31, 2021											28,283
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	291.4				277.2									277.2		14.2
Other comprehensive income (loss):
Foreign currency translation	1.8	[1]			8.6										8.6	(6.8)
Derivative financial instruments, net of income tax expense/benefit	37.1				37.1										37.1
Minimum pension liability adjustment, net of income tax expense/benefit	9.2				9.2										9.2
Comprehensive income	339.5				332.1
Divestment of noncontrolling interest	(24.4)															(24.4)
Current period mark to redemption value of redeemable noncontrolling interest	4.6				4.6									4.6
Net income allocated to redeemable noncontrolling interests	(0.1)															(0.1)
Dividends paid to Greif, Inc. shareholders	(82.0)				(82.0)									(82.0)
Dividends paid to noncontrolling interests and other	(8.7)															(8.7)
Dividends earned on RSU shares	$ (1.1)				(1.1)									(1.1)
Share repurchases (in shares)	0							(1,022)			(1,022)
Share repurchases	$ (75.0)				(75.0)			$ (15.0)			$ (60.0)
Long-term incentive shares issued (in shares)								52			(52)
Long-term incentive shares issued	3.1				3.1			$ 3.0			$ 0.1
Share based compensation	3.8				3.8			$ 3.8
Restricted stock (in shares)									3	22		3	22
Restricted stock			$ 0.1	$ 1.2		$ 0.1			$ 0.1	$ 1.2
Ending balance (in shares) at Jul. 31, 2022								47,614
Ending balance at Jul. 31, 2022	1,736.6				1,701.1			$ 172.4			$ (194.0)			2,024.3	(301.6)	35.5
Ending balance (in shares) at Jul. 31, 2022											29,228
Beginning balance (in shares) at Apr. 30, 2022								48,636
Beginning balance at Apr. 30, 2022	1,718.4				1,686.4			$ 186.0			$ (134.0)			1,910.3	(275.9)	32.0
Beginning balance (in shares) at Apr. 30, 2022											28,206
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	146.1				141.8									141.8		4.3
Other comprehensive income (loss):
Foreign currency translation	(30.8)	[1]			(29.6)										(29.6)	(1.2)
Derivative financial instruments, net of income tax expense/benefit	1.2				1.2										1.2
Minimum pension liability adjustment, net of income tax expense/benefit	2.7				2.7										2.7
Comprehensive income	119.2				116.1
Current period mark to redemption value of redeemable noncontrolling interest	(0.3)				(0.3)									(0.3)
Net income allocated to redeemable noncontrolling interests	(0.2)															(0.2)
Dividends paid to Greif, Inc. shareholders	(27.4)				(27.4)									(27.4)
Dividends paid to noncontrolling interests and other	0.6															0.6
Dividends earned on RSU shares	(0.1)				(0.1)									(0.1)
Share repurchases (in shares)								(1,022)			(1,022)
Share repurchases	(75.0)				(75.0)			$ (15.0)			$ (60.0)
Share based compensation	1.4				1.4			$ 1.4
Ending balance (in shares) at Jul. 31, 2022								47,614
Ending balance at Jul. 31, 2022	$ 1,736.6				$ 1,701.1			$ 172.4			$ (194.0)			$ 2,024.3	$ (301.6)	$ 35.5
Ending balance (in shares) at Jul. 31, 2022											29,228

[1] Nine months ended July 31, 2022 balance includes $113.1 million release of foreign currency translation from business divestment.