Divestitures and Acquisitions - Summary of Preliminary Allocation of Purchase Price to Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions			2 Months Ended	9 Months Ended
	Aug. 01, 2019	Aug. 01, 2018	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Assets:
Goodwill			$ 2,213.1	$ 2,213.1	$ 1,947.6
Automated Packaging Systems
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration transferred	$ 445.7
Assets:
Cash and cash equivalents	7.4
Trade receivables, net	37.3
Other receivables	8.9
Inventories, net	40.7
Prepaid expenses and other current assets	2.3
Property and equipment, net	79.3
Goodwill	261.3
Identifiable intangible assets, net	78.7
Other non-current assets	24.7
Total assets	540.6
Liabilities:
Current portion of long-term debt	2.6
Accounts payable	12.0
Other current liabilities	36.8
Long-term debt, less current portion	4.3
Other non-current liabilities	39.2
Total liabilities	$ 94.9
AFP
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration transferred		$ 70.8	3.3	74.1
Assets:
Cash and cash equivalents		2.9	3.3	3.3
Trade receivables, net		30.8	30.8	30.8
Inventories, net		7.1	7.1	7.1
Prepaid expenses and other current assets		0.7	0.7	0.7
Property and equipment, net		3.5	3.1	3.1
Goodwill		21.6	22.6	22.6
Identifiable intangible assets, net		18.6	19.3	19.3
Other non-current assets		0.7	0.3	0.3
Total assets		85.9	87.2	87.2
Liabilities:
Current portion of long-term debt		0.0	0.1	0.1
Accounts payable		13.8	11.6	11.6
Other current liabilities		1.3	1.2	1.2
Long-term debt, less current portion		0.0	0.2	0.2
Total liabilities		$ 15.1	13.1	$ 13.1
Measurement Period
Cash and cash equivalents			0.4
Property and equipment, net			(0.4)
Identifiable intangible assets, net			0.7
Goodwill			1.0
Other non-current assets			(0.4)
Total assets			1.3
Current portion of long-term debt			0.1
Accounts payable			(2.2)
Other current liabilities			(0.1)
Long-term debt, less current portion			0.2
Total liabilities			$ (2.0)