Discontinued Operations Income Statement (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	$ 93.8	$ 433.6	$ 450.3	$ 820.6
Cost of goods sold	71.8	316.3	339.7	599.1
Gross profit	22.0	117.3	110.6	221.5
Selling, general and administrative	23.8	98.8	103.3	180.3
Research and development	1.5	5.1	5.7	9.9
Operating (loss) income	(3.3)	13.4	1.6	31.3
(Loss) income from discontinued operations before income taxes	(3.2)	13.3	2.5	31.5
Provision for income taxes	2.0	3.2	0.6	5.8
(Loss) income from discontinued operations, net of tax	(5.2)	10.1	1.9	25.7
Gain from sale of discontinued operations before income taxes	(203.0)	0.0	(203.0)	0.0
Provision for income taxes	2.4	0.0	2.4	0.0
Gain from sale of discontinued operations, net of tax	$ (200.6)	$ 0.0	$ (200.6)	$ 0.0