CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Millions	Total	Executive Officer	Director	Cumulative Effect, Period of Adoption, Adjustment	Capital Stock	Capital Stock Executive Officer	Capital Stock Director	Treasury Stock	Treasury Stock Executive Officer	Treasury Stock Director	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Greif, Inc. Equity	Greif, Inc. Equity Executive Officer	Greif, Inc. Equity Director	Greif, Inc. Equity Cumulative Effect, Period of Adoption, Adjustment	Noncontrolling Interests
Beginning balance (shares) at Oct. 31, 2018				(2,100)	47,949			28,893				(2,100)					(2,100)
Beginning balance, value at Oct. 31, 2018	$ 1,154.2				$ 150.5			$ (135.4)			$ 1,469.8		$ (377.1)	$ 1,107.8				$ 46.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	194.2										171.0			171.0				23.2
Other comprehensive income (loss):
Foreign currency translation	(4.5)												(5.2)	(5.2)				0.7
Derivative financial instruments, net of income tax expense (benefit)	(26.1)												(26.1)	(26.1)
Minimum pension liability adjustment, net of income tax expense (benefit)	(25.3)												(25.3)	(25.3)
Comprehensive income	138.3													114.4
Current period mark to redemption value of redeemable noncontrolling interest	4.9										4.9			4.9
Net income allocated to redeemable noncontrolling interests	(2.3)																	(2.3)
Dividends paid to Greif, Inc.,	(104.0)										(104.0)			(104.0)
Dividends paid to noncontrolling interests	(7.9)																	(7.9)
Restricted stock executives and directors (shares)							(25)			(25)
Restricted stock directors			$ 1.1				$ 1.1									$ 1.1
Acquisition of noncontrolling interest and other	(2.7)										(0.6)			(0.6)				(2.1)
Long-term incentive shares issued (shares)					(292)			(292)
Long-term incentive shares issued	11.6				$ 11.0			$ 0.6						11.6
Ending balance (shares) at Oct. 31, 2019					48,266			28,576
Ending balance, value at Oct. 31, 2019	$ 1,191.1				$ 162.6			$ (134.8)			1,539.0		(433.7)	1,133.1				58.0
Other comprehensive income (loss):
Adoption of ASU 2016-16	Accounting Standard Update 2016-16 [Member]
Net income	$ 124.3										108.8			108.8				15.5
Foreign currency translation	(9.8)												3.1	3.1				(12.9)
Derivative financial instruments, net of income tax expense (benefit)	(12.0)												(12.0)	(12.0)
Minimum pension liability adjustment, net of income tax expense (benefit)	15.1												15.1	15.1
Comprehensive income	117.6													115.0
Current period mark to redemption value of redeemable noncontrolling interest	0.4										0.4			0.4
Net income allocated to redeemable noncontrolling interests	(0.1)																	(0.1)
Dividends paid to Greif, Inc.,	(104.3)										(104.3)			(104.3)
Dividends paid to noncontrolling interests	(12.0)																	(12.0)
Restricted stock executives and directors (shares)						(3)	(28)		(3)	(28)
Restricted stock directors		$ 0.1	1.1			$ 0.1	$ 1.0			$ 0.1					$ 0.1	1.1
Long-term incentive shares issued (shares)					(153)			(153)
Long-term incentive shares issued	5.3				$ 5.0			$ 0.3						5.3
Share based compensation	1.5				$ 1.5									1.5
Ending balance (shares) at Oct. 31, 2020					48,450			28,392
Ending balance, value at Oct. 31, 2020	1,200.7				$ 170.2			$ (134.4)			1,543.9		(427.5)	1,152.2				48.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	413.2										390.7			390.7				22.5
Other comprehensive income (loss):
Foreign currency translation	(1.6)												(0.5)	(0.5)				(1.1)
Derivative financial instruments, net of income tax expense (benefit)	21.1												21.1	21.1
Minimum pension liability adjustment, net of income tax expense (benefit)	50.4												50.4	50.4
Comprehensive income	483.1													461.7
Current period mark to redemption value of redeemable noncontrolling interest	(2.6)										(2.6)			(2.6)
Net income allocated to redeemable noncontrolling interests	(2.4)																	(2.4)
Dividends paid to Greif, Inc.,	(105.8)										(105.8)			(105.8)
Dividends paid to noncontrolling interests	(6.2)																	(6.2)
Dividends earned on RSU shares	(0.6)										(0.6)			(0.6)
Restricted stock executives and directors (shares)						(3)	(26)		(3)	(26)
Restricted stock directors		$ 0.1	$ 1.3			$ 0.1	$ 1.2		$ 0.0	$ 0.1					$ 0.1	$ 1.3
Long-term incentive shares issued (shares)					(80)			(80)
Long-term incentive shares issued	4.1				$ 3.9			$ 0.2						4.1
Share based compensation	3.9				$ 3.9									3.9
Ending balance (shares) at Oct. 31, 2021					48,559			28,283
Ending balance, value at Oct. 31, 2021	$ 1,575.6				$ 179.3			$ (134.1)			$ 1,825.6		$ (356.5)	$ 1,514.3				$ 61.3