CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY - USD ($) $ in Millions	Total	Director	Earnings per Class A common stock - basic	Earnings per Class B common stock - basic	Greif, Inc. Equity	Greif, Inc. Equity Director	Common Stock	Common Stock Director	Treasury Stock	Treasury Stock Director	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Non controlling Interests
Beginning balance (in shares) at Oct. 31, 2022							47,443,000
Beginning balance, value at Oct. 31, 2022	$ 1,794.3				$ 1,761.3		$ 173.5		$ (205.1)		$ 2,095.2	$ (302.3)	$ 33.0
Beginning balance, treasury stock (in shares) at Oct. 31, 2022									29,399,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	379.1				359.2						359.2		19.9
Other comprehensive income (loss):
Foreign currency translation	(1.1)				(1.2)							(1.2)	0.1
Derivative financial instruments, net of tax (benefit) expense	(1.1)				(1.1)							(1.1)
Minimum pension liability adjustment, net of tax expense	(11.9)				(11.9)							(11.9)
Comprehensive income	365.0				345.0
Current period mark to redemption value of redeemable noncontrolling interest and other	0.1				0.1						0.1
Net income allocated to redeemable noncontrolling interests	(2.7)												(2.7)
Dividends paid to Greif, Inc.,	(116.5)				(116.5)						(116.5)
Dividends declared to noncontrolling interests and other	(11.9)												(11.9)
Dividends earned on RSU shares	(0.1)				(0.1)						(0.1)
Colleague stock purchase plan	0.3				0.3		$ 0.3
Share repurchases (in shares)							(1,006,000)		1,006,000
Share repurchases	(64.4)				(64.4)		$ 14.5		$ (78.9)
Long-term incentive shares issued (in shares)							350,000		(350,000)
Long-term incentive shares issued	16.7				16.7		$ 14.7		$ 2.0
Share based compensation	4.2				4.2		$ 4.2
Restricted stock, directors (in shares)								18,000		(18,000)
Restricted stock, directors		$ 1.3				$ 1.3		$ 1.2		$ 0.1
Ending balance (in shares) at Oct. 31, 2023							46,805,000
Ending balance, value at Oct. 31, 2023	1,986.3				1,947.9		$ 208.4		$ (281.9)		2,337.9	(316.5)	38.4
Ending balance, treasury stock (in shares) at Oct. 31, 2023									30,037,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	295.5				268.8						268.8		26.7
Other comprehensive income (loss):
Foreign currency translation	2.5				3.6							3.6	(1.1)
Derivative financial instruments, net of tax (benefit) expense	(37.8)				(37.8)							(37.8)
Minimum pension liability adjustment, net of tax expense	(4.4)				(4.4)							(4.4)
Comprehensive income	255.8				230.2
Current period mark to redemption value of redeemable noncontrolling interest and other	1.0				1.0						1.0
Net income allocated to redeemable noncontrolling interests	(8.5)												(8.5)
Dividends paid to Greif, Inc.,	(121.0)				(121.0)						(121.0)
Dividends declared to noncontrolling interests and other	(20.4)												(20.4)
Dividends earned on RSU shares	(0.5)				(0.5)						(0.5)
Colleague stock purchase plan (in shares)							71,000		(71,000)
Colleague stock purchase plan	4.7				4.7		$ 4.1		$ 0.6
Long-term incentive shares issued (in shares)							284,000		(284,000)
Long-term incentive shares issued	12.8				12.8		$ 10.6		$ 2.2
Share based compensation	6.0				6.0		$ 6.0
Restricted stock, directors (in shares)								21,000		(21,000)
Restricted stock, directors		1.3				1.3		$ 1.2		$ 0.1
Ending balance (in shares) at Oct. 31, 2024			25,850,270	21,331,127			47,181,000
Ending balance, value at Oct. 31, 2024	2,117.5				2,082.4		$ 230.3		$ (279.0)		2,486.2	(355.1)	35.1
Ending balance, treasury stock (in shares) at Oct. 31, 2024			16,431,650	13,228,873					29,661,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	863.1				840.0						840.0		23.1
Other comprehensive income (loss):
Foreign currency translation	113.5				113.0							113.0	0.5
Derivative financial instruments, net of tax (benefit) expense	(25.8)				(25.8)							(25.8)
Minimum pension liability adjustment, net of tax expense	17.1				17.1							17.1
Comprehensive income	967.9				944.3
Current period mark to redemption value of redeemable noncontrolling interest and other	(4.6)				(4.6)						(4.6)
Net income allocated to redeemable noncontrolling interests	(6.6)												(6.6)
Dividends paid to Greif, Inc.,	(126.4)				(126.4)						(126.4)
Dividends declared to noncontrolling interests and other	(14.6)												(14.6)
Dividends earned on RSU shares	(0.3)				(0.3)						(0.3)
Colleague stock purchase plan (in shares)							85,000		(85,000)
Colleague stock purchase plan	5.3				5.3		$ 4.6		$ 0.7
Long-term incentive shares issued (in shares)							211,000		(211,000)
Long-term incentive shares issued	8.2				8.2		$ 6.6		$ 1.6
Share based compensation	4.5				4.5		$ 4.5
Restricted stock, directors (in shares)								24,000		(24,000)
Restricted stock, directors		(4.3)				(4.3)		$ (4.5)		$ 0.2
Restricted stock executives and directors		$ 5.8				$ 5.8		$ 5.8
Ending balance (in shares) at Sep. 30, 2025			26,169,944	21,331,127			47,501,000
Ending balance, value at Sep. 30, 2025	$ 2,952.4				$ 2,914.9		$ 247.3		$ (276.5)		$ 3,194.9	$ (250.8)	$ 37.5
Ending balance, treasury stock (in shares) at Sep. 30, 2025			16,111,976	13,228,873					29,341,000