Acquisition and Discontinued Operations (Summary of Results of Operations Related to AFI) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income tax expense	$ 0.3	$ (1.8)
Net (loss) gain on disposal of discontinued business	$ (0.4)	1.7
AFI [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net sales		284.4
Cost of goods sold		237.2
Gross profit		47.2
Selling, general and administrative expenses		50.5
Operating (loss)		(3.3)
Other non-operating expense, net		1.1
(Loss) from discontinued operations before income taxes		(4.4)
Income tax expense		0.1
Net (loss) gain on disposal of discontinued business		$ (4.5)