Acquisitions and Divestitures - Schedule of Preliminary Valuation of Identifiable Assets Acquired and Liabilities Assumed (Details) - Caraustar - USD ($) $ in Millions		3 Months Ended	9 Months Ended	12 Months Ended
	Feb. 11, 2019	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020
Fair value of consideration transferred
Cash consideration	$ 1,834.9			$ 1,834.9
Cash consideration, Measurement Period Adjustments			$ 0.0
Recognized amounts of identifiable assets acquired and liabilities assumed
Accounts receivable	147.0	$ 147.0		147.0
Accounts receivable, Measurement Period Adjustments			0.0
Inventories	103.9	99.5		99.5
Inventories, Measurement Period Adjustments			(4.4)
Prepaid and other current assets	21.5	12.2		12.2
Prepaid and other current assets, Measurement Period Adjustments			(9.3)
Intangibles	717.1	725.5		725.5
Intangibles, Measurement Period Adjustments			8.4
Other long-term assets	1.3	5.6		5.6
Other long-term assets, Measurement Period Adjustments			4.3
Properties, plants and equipment	521.3	503.7		503.7
Properties, plants and equipment, Measurement Period Adjustments			(17.6)
Total assets acquired	1,512.1	1,493.5		1,493.5
Total assets acquired, Measurement Period Adjustments			(18.6)
Accounts payable	(99.5)	(99.5)		(99.5)
Accounts payable, Measurement Period Adjustments			0.0
Accrued payroll and employee benefits	(42.9)	(50.1)		(50.1)
Accrued payroll and employee benefits, Measurement Period Adjustments			(7.2)
Other current liabilities	(21.8)	(17.3)		(17.3)
Other current liabilities, Measurement Period Adjustments			4.5
Long-term deferred tax liability	(185.7)	(148.3)		(148.3)
Long-term deferred tax liability, Measurement Period Adjustments		14.6	37.4
Pension and post-retirement obligations	(67.1)	(67.1)		(67.1)
Pension and postretirement obligations, Measurement Period Adjustments			0.0
Other long-term liabilities	(12.7)	(20.2)		(20.2)
Other long-term liabilities, Measurement Period Adjustments			(7.5)
Total liabilities assumed	(429.7)	(402.5)		(402.5)
Total liabilities assumed, Measurement Period Adjustments			27.2
Total identifiable net assets	1,082.4	1,091.0		1,091.0
Total identifiable net assets, Measurement Period Adjustments			8.6
Goodwill	$ 752.5	$ 743.9		$ 743.9
Goodwill, Measurement Period Adjustments			$ (8.6)