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Segment Information (Segment Financial Information) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |
Net sales | $ 1,599.1 | $ 1,509.1 | $ 1,399.8
Operating profit | 228.9 | 196.8 | 128.6
Interest expense, net | (6.5) | (7.0) | (12.5)
Income before income taxes | 222.4 | 189.8 | 116.1
Segment assets | 1,862.8 | 1,716.7 | 1,695.1
Capital expenditures | 130.8 | 170.2 | 131.6
Depreciation and amortization expense | 96.7 | 90.7 | 89.9
Proprietary Products [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 1,236.9 | 1,189.9 | 1,098.3
Operating profit | 242.2 | 241.9 | 212.2
Interest expense, net | 0.0 | 0.0 | 0.0
Income before income taxes | 242.2 | 241.9 | 212.2
Segment assets | 1,321.3 | 1,173.9 | 1,083.7
Capital expenditures | 107.2 | 133.2 | 113.2
Depreciation and amortization expense | 77.1 | 71.7 | 69.9
Contract-Manufactured Products [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 362.5 | 320.2 | 302.4
Operating profit | 48.3 | 38.2 | 35.5
Interest expense, net | 0.0 | 0.0 | 0.0
Income before income taxes | 48.3 | 38.2 | 35.5
Segment assets | 286.4 | 261.1 | 248.5
Capital expenditures | 18.6 | 34.0 | 22.1
Depreciation and amortization expense | 16.4 | 14.9 | 14.2
Corporate and Eliminations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | (0.3) | (1.0) | (0.9)
Operating profit | (61.6) | (83.3) | (119.1)
Interest expense, net | (6.5) | (7.0) | (12.5)
Income before income taxes | (68.1) | (90.3) | (131.6)
Segment assets | 255.1 | 281.7 | 362.9
Capital expenditures | 5.0 | 3.0 | (3.7)
Depreciation and amortization expense | $ 3.2 | $ 4.1 | $ 5.8

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