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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Income Tax Disclosure [Abstract] |  |  |  |
Effective income tax rate, continuing operations |  | 20.70% | 28.20% |
Tax expense on gain from commercial settlement |  | $ 0.9 |  |
Tax benefits related to restructuring expense |  | 9.5 | $ 1.2 |
Tax Benefit Associated with Merger and Acquisition Expense |  | 0.2 | 0.3 |
Effective Income Tax Rate Reconciliation, Deduction, Other, Amount |  | 0.4 |  |
Effective rate reconciliation, measurement period adjustments due to the Tax Act | $ 6.6 | 20.0 |  |
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount |  | 21.6 |  |
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount |  | 11.3 | $ 11.7 |
Deferred Tax Assets, Net | $ 170.9 | $ 170.9 |  | $ 121.2

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