Divestitures and Acquisitions - Summary of Preliminary Allocation of Purchase Price to Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions		3 Months Ended		8 Months Ended
	Aug. 01, 2018	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total consideration transferred		$ 1.2	$ (0.9)
Assets:
Goodwill		1,950.0		$ 1,950.0	$ 1,947.6
Other non-current assets		0.3		0.3
Liabilities:
Current portion of long-term debt		0.1		0.1
Product Care
Assets:
Goodwill		1,428.4		1,428.4	$ 1,427.9
AFP, Inc | Product Care
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total consideration transferred	$ 70.8	74.1		3.3
Assets:
Cash and cash equivalents	2.9	2.9		2.9
Trade receivables, net	30.8	30.8		30.8
Inventories, net	7.1	7.2		7.2
Prepaid expenses and other current assets	0.7	0.7		0.7
Property and equipment, net	3.5	3.1		3.1
Identifiable intangible assets, net	18.6	22.7		22.7
Goodwill	21.6	19.6		19.6
Other non-current assets	0.7
Total assets	85.9	87.3		87.3
Liabilities:
Current portion of long-term debt	0.0
Accounts payable	13.8	11.6		11.6
Other current liabilities	1.3	1.3		1.3
Long-term debt, less current portion	0.0	0.2		0.2
Total liabilities	$ 15.1	$ 13.2		13.2
Measurement Period
Inventories, net				0.1
Property and equipment, net				(0.4)
Identifiable intangible assets, net				4.1
Goodwill				(2.0)
Other non-current assets				(0.4)
Total assets				1.4
Current portion of long-term debt				0.1
Accounts payable				(2.2)
Other current liabilities				0.0
Long-term debt, less current portion				0.2
Total liabilities				$ (1.9)