Divestiture and Acquisition Activity - Narrative (Details) - USD ($) $ in Millions			3 Months Ended				12 Months Ended
	Nov. 01, 2021	Aug. 01, 2019	Dec. 31, 2021	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Gain on sale of business							$ 45.3	$ 0.0	$ 0.0
Taxes on net gain on sale							225.0	142.1	76.6
Goodwill			$ 2,189.4				2,189.4	2,222.6	2,216.9
Automated Packaging Systems
Business Acquisition [Line Items]
Percentage of acquired equity interest		100.00%
Purchase price of acquisition		$ 441.4
Non contingent consideration to be paid in the future		$ 58.2
Deferred compensation paid									19.7
Transaction expenses								0.3	$ 3.3
Adjustment to consideration transferred				$ 4.3
Other 2019 Acquisitions
Business Acquisition [Line Items]
Purchase price						$ 23.4
Goodwill						$ 6.0
Acquisition, purchase price and other adjustments					$ 0.3
Protective | Automated Packaging Systems
Business Acquisition [Line Items]
Deferred compensation paid							$ 17.4	$ 19.0
Reflectix, Inc | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Protective
Business Acquisition [Line Items]
Proceeds from sale of businesses			$ 82.5
Gain on sale of business	$ 45.3
Disposal group, net carrying value	35.8
Disposal group, inventory	6.8
Disposal group, trade receivable	6.6
Disposal group, property, plant and equipment	1.0
Disposal group, goodwill	23.2
Taxes on net gain on sale	$ 17.3