Restructuring Charges - Reconciliation of Total Amounts Expected to be Incurred from Open Restructuring Plans Anticipated to be Realized (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Restructuring and Related Cost [Abstract]
Total Amounts Expected to be Incurred	$ 61.5		$ 61.5
Restructuring charges	11.9	$ 5.8	38.7	$ 26.1	$ 18.6
Amounts remaining to be incurred	22.8		22.8
Employee Separation Costs
Restructuring and Related Cost [Abstract]
Restructuring charges			26.4	22.5	14.8
Other restructuring costs
Restructuring and Related Cost [Abstract]
Restructuring charges			12.3	$ 3.6	$ 3.8
Rigid Industrial Packaging & Services
Restructuring and Related Cost [Abstract]
Total Amounts Expected to be Incurred	42.5		42.5
Restructuring charges			26.3
Amounts remaining to be incurred	16.2		16.2
Rigid Industrial Packaging & Services | Employee Separation Costs
Restructuring and Related Cost [Abstract]
Total Amounts Expected to be Incurred	31.6		31.6
Restructuring charges			21.0
Amounts remaining to be incurred	10.6		10.6
Rigid Industrial Packaging & Services | Other restructuring costs
Restructuring and Related Cost [Abstract]
Total Amounts Expected to be Incurred	10.9		10.9
Restructuring charges			5.3
Amounts remaining to be incurred	5.6		5.6
Flexible Products & Services
Restructuring and Related Cost [Abstract]
Total Amounts Expected to be Incurred	4.3		4.3
Restructuring charges			2.8
Amounts remaining to be incurred	1.5		1.5
Flexible Products & Services | Employee Separation Costs
Restructuring and Related Cost [Abstract]
Total Amounts Expected to be Incurred	1.9		1.9
Restructuring charges			0.9
Amounts remaining to be incurred	1.0		1.0
Flexible Products & Services | Other restructuring costs
Restructuring and Related Cost [Abstract]
Total Amounts Expected to be Incurred	2.4		2.4
Restructuring charges			1.9
Amounts remaining to be incurred	0.5		0.5
Paper Packaging & Services
Restructuring and Related Cost [Abstract]
Total Amounts Expected to be Incurred	14.7		14.7
Restructuring charges			9.6
Amounts remaining to be incurred	5.1		5.1
Paper Packaging & Services | Employee Separation Costs
Restructuring and Related Cost [Abstract]
Total Amounts Expected to be Incurred	4.5		4.5
Restructuring charges			4.5
Amounts remaining to be incurred	0.0		0.0
Paper Packaging & Services | Other restructuring costs
Restructuring and Related Cost [Abstract]
Total Amounts Expected to be Incurred	10.2		10.2
Restructuring charges			5.1
Amounts remaining to be incurred	$ 5.1		$ 5.1