Discontinued Operations Income Statement (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Net sales	$ 155.0	$ 606.9	$ 693.9	$ 1,465.7
Cost of goods sold	93.8	375.4	424.0	947.0
Gross profit	61.2	231.5	269.9	518.7
Selling, general and administrative	93.1	136.5	231.0	324.9
Research and development	3.4	12.5	14.6	27.6
Operating (loss) income	(35.3)	82.5	24.3	166.2
(Loss) income from discontinued operations before income taxes	(37.9)	81.7	19.8	165.3
Income tax provision (benefit)	(1.5)	15.2	11.7	23.7
(Loss) income from discontinued operations, net of tax	(36.4)	66.5	8.1	141.6
Discontinued Operation, Provision for Loss (Gain) on Disposal, before Income Tax	0.0	(203.0)	0.0	(203.0)
Discontinued Operation, Tax (Expense) Benefit from Provision for (Gain) Loss on Disposal	0.0	2.4	0.0	2.4
Gain from sale of discontinued operations, net of tax	$ 0.0	$ (200.6)	$ 0.0	$ (200.6)	$ 181.1