Discontinued Operations, Divestitures and Acquisitions - Summary of Allocation of Purchase Price to Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Oct. 02, 2017	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total consideration transferred		$ (0.9)	$ 0.0
Assets:
Goodwill		1,943.3		$ 1,943.3	$ 1,939.8
Product Care
Assets:
Goodwill		1,413.1		1,413.1	$ 1,412.9
Fagerdala Singapore Pte Ltd. | Product Care
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total consideration transferred	$ 106.6	106.2		(0.4)
Assets:
Cash and cash equivalents	13.3	13.3		13.3
Trade receivables, net	22.4	22.4		22.4
Inventory, net	10.0	10.0		10.0
Prepaid expenses and other current assets	8.4	8.4		8.4
Property and equipment, net	23.3	23.3		23.3
Intangible assets, net	41.4	42.1		42.1
Goodwill	39.3	39.1		39.1
Assets	158.1	158.6		158.6
Liabilities:
Short-term borrowings	14.0	14.0		14.0
Accounts payable	6.9	6.9		6.9
Other current liabilities	15.1	16.0		16.0
Long-term debt, less current portion	3.8	3.8		3.8
Non-current deferred taxes	11.7	11.7		11.7
Liabilities	$ 51.5	52.4		52.4
Measurement Period Adjustment
Intangible assets, net				0.7
Goodwill				(0.2)
Assets				0.5
Other current liabilities				0.9
Liabilities				0.9
Customer Relationships | Fagerdala Singapore Pte Ltd. | Product Care
Assets:
Intangible assets, net		$ 25.4		25.4
Measurement Period Adjustment
Useful life		17 years
Trademarks and Trade Names | Fagerdala Singapore Pte Ltd. | Product Care
Assets:
Intangible assets, net		$ 10.6		10.6
Measurement Period Adjustment
Useful life		15 years
Acquired Technologies | Fagerdala Singapore Pte Ltd. | Product Care
Assets:
Intangible assets, net		$ 6.1		$ 6.1
Measurement Period Adjustment
Useful life		13 years