Acquisitions - Summary of Assets Acquired and Liabilities Assumed Codenhove Acquisition (Details) - USD ($) $ in Millions	Dec. 31, 2017	Nov. 01, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets Acquired
Acquired goodwill	$ 85.3		$ 70.4	$ 72.2
W.A. Sanders Coldenhove Holding B.V.
Assets Acquired
Cash and cash equivalents	4.9
Accounts receivable	4.7
Inventories	12.7
Deferred income taxes	0.4
Prepaid and other current assets	0.2
Property, plant and equipment	31.2
Non-amortizable intangible assets	1.2	$ 1.2
Amortizable intangible assets	4.7	$ 4.7
Acquired goodwill	10.0
Other assets	0.1
Total assets acquired	70.1
Liabilities Assumed
Accounts payable	4.1
Accrued expenses	5.4
Contingent liability (1)	2.3
Deferred income taxes	3.5
Noncurrent employee benefits	4.9
Long-term debt	1.8
Other noncurrent obligations	0.1
Total liabilities assumed	22.1
Net assets acquired	$ 48.0