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Fair Value Measurements (Fair Value of Assets and Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Assets: |  |
Deferred compensation assets | $ 7.4 | $ 6.8
Foreign currency contracts | 0.2 | 0.2
Total assets at fair value | 7.6 | 7.0
Liabilities: |  |
Contingent consideration | 8.0 | 6.0
Deferred compensation liabilities | 8.4 | 8.8
Interest rate swap contracts | 1.0 | 2.0
Foreign currency contracts | 1.6 | 0.2
Total liabilities at fair value | 19.0 | 17.0
Other Financial Instruments [Abstract] |  |
Long-term debt, fair value | 228.3 | 225.0
Long-term debt | 226.2 | 228.9
Level 1 [Member] |  |
Assets: |  |
Deferred compensation assets | 7.4 | 6.8
Total assets at fair value | 7.4 | 6.8
Liabilities: |  |
Deferred compensation liabilities | 8.4 | 8.8
Total liabilities at fair value | 8.4 | 8.8
Level 2 [Member] |  |
Assets: |  |
Foreign currency contracts | 0.2 | 0.2
Total assets at fair value | 0.2 | 0.2
Liabilities: |  |
Interest rate swap contracts | 1.0 | 2.0
Foreign currency contracts | 1.6 | 0.2
Total liabilities at fair value | 2.6 | 2.2
Level 3 [Member] |  |
Liabilities: |  |
Contingent consideration | 8.0 | 6.0
Total liabilities at fair value | $ 8.0 | $ 6.0

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