Discontinued Operations Income Statement (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	$ 0.0	$ 410.9	$ 450.3	$ 1,231.6
Cost of goods sold	0.0	287.6	339.7	886.7
Gross profit	0.0	123.3	110.6	344.9
Selling, general and administrative	0.0	87.4	103.3	267.6
Research and development	0.0	4.3	5.7	14.2
Operating income	0.0	31.6	1.6	63.1
Income from discontinued operations before income taxes	0.0	32.0	2.5	63.6
Provision for income taxes	0.0	9.1	0.6	15.0
Income from discontinued operations, net of tax	0.0	22.9	1.9	48.6
(Loss) gain from sale of discontinued operations before income taxes	1.7	(0.6)	(201.3)	(0.6)
Provision for income taxes	0.0	0.0	2.4	0.0
(Loss) gain from sale of discontinued operations, net of tax	$ (1.7)	$ 0.6	$ 198.9	$ 0.6