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Segment Information (Details) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 USD ($) segment | Mar. 31, 2017 USD ($)
Segment Reporting [Abstract] |  |
Number of reportable segments | segment | 2 |
Restructuring and related charges | $ 3.3 |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Net sales | 415.7 | $ 387.7
Total operating (loss) profit | 53.4 | 60.5
Interest expense | 1.9 | 2.1
Interest income | (0.6) | (0.3)
Other nonoperating income | (1.6) | (0.8)
Income before income taxes | 53.7 | 59.5
Net periodic benefit cost | 1.2 | 1.9
Service cost | 2.8 | 2.7
Proprietary Products [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Net sales | 326.2 | 308.8
Total operating (loss) profit | 62.8 | 65.1
Contract-Manufactured Products [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Net sales | 89.5 | 79.1
Total operating (loss) profit | 9.5 | 8.8
Intersegment sales elimination [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Net sales | 0.0 | (0.2)
Corporate [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Total operating (loss) profit | (15.6) | (13.4)
Other unallocated items [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Total operating (loss) profit | (3.3) | 0.0
Accounting Standards Update 2017-07 [Member] |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |
Net benefit cost components other than service cost | $ 1.6 | $ 0.8

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