Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended								12 Months Ended
		Feb. 28, 2014	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of information used in computing basic and diluted earnings per share [Abstract]
Earnings (Loss)			$ 79.4	$ (17.8)	$ 4.4	$ (0.4)	$ 31.9	$ 10.5	$ (30.9)	$ (5.0)	$ 65.6	$ 6.5	$ 19.8
Earnings (loss) from discontinued operations, net											2.1	61.8	(62.1)
Net earnings (loss)			$ 79.6	$ (16.2)	$ 4.6	$ (0.3)	$ 85.5	$ 15.7	$ (29.7)	$ (3.2)	$ 67.7	$ 68.3	$ (42.3)
Basic earnings (loss) per common share:
Per Share - Basic			$ 0.88	$ (0.20)	$ 0.05	$ 0	$ 0.36	$ 0.12	$ (0.35)	$ (0.06)	$ 0.73	$ 0.07	$ 0.22
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share											0.02	0.69	(0.70)
Per Share - Basic			0.88	(0.18)	0.05	0	0.96	0.18	(0.33)	(0.04)	$ 0.75	$ 0.76	$ (0.48)
Basic weighted average shares outstanding (in shares)	[1]										90,050,051	89,329,794	88,667,098
Diluted earnings (loss) per common share:
Per Share - Diluted			0.87	(0.20)	0.05	0	0.35	0.12	(0.35)	(0.06)	$ 0.72	$ 0.07	$ 0.22
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share											0.02	0.68	(0.69)
Per Share - Diluted			$ 0.87	$ (0.18)	$ 0.05	$ 0	$ 0.94	$ 0.17	$ (0.33)	$ (0.04)	$ 0.74	$ 0.75	$ (0.47)
Dilutive weighted average shares outstanding (in shares)	[1]										91,194,747	90,490,007	89,182,967
Stock issued during period (in shares)		0.5
Weighted average number of anti-dilutive shares excluded from the calculation (in shares)											4,346,400	3,944,160	5,080,023

[1]
  Years Ended December 31,   2018   2017   2016 Revenues $ 826.9
  $ 744.2
  $ 755.7
Cost of goods sold 503.9
  452.8
  458.2
Impairment charges —
  1.4
  0.3
Restructuring charges - cost of goods sold 0.4
  4.0
  1.5
Gross profit 322.6
  286.0
  295.7
Research and development expenses 100.6
  93.4
  92.0
Selling and administrative expenses 142.5
  126.6
  149.9
Impairment charges —
  19.9
  0.2
Restructuring charges 1.7
  6.2
  8.6
Operating expenses 244.8
  246.1
  250.7
Operating earnings 77.8
  39.9
  45.0
Interest expense, net 16.0
  20.6
  20.4
Other expense (income), net 0.7
  (0.1 )   (3.5 ) Earnings before income taxes and discontinued operations 61.1
  19.4
  28.1
(Benefit from) provision for income taxes (4.5 )   12.9
  8.3
Earnings from continuing operations 65.6

6.5
  19.8
Earnings (loss) from discontinued operations, net 2.1
  61.8
  (62.1 ) Net earnings (loss) $ 67.7
  $ 68.3
  $ (42.3 )             Earnings per share from continuing operations:           Basic $ 0.73
  $ 0.07
  $ 0.22
Diluted $ 0.72
  $ 0.07
  $ 0.22
            Earnings (loss) per share from discontinued operations:           Basic $ 0.02
  $ 0.69
  $ (0.70 ) Diluted $ 0.02
  $ 0.68
  $ (0.69 )             Net earnings (loss) per share:           Basic $ 0.75
  $ 0.76
  $ (0.48 ) Diluted $ 0.74
  $ 0.75
  $ (0.47 )             Weighted-average common shares outstanding:           Basic 90,050,051

89,329,794
  88,667,098
Diluted 91,194,747

90,490,007
  89,182,967