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Benefit Plans (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Retirement Benefits [Abstract] |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | $ 7.2 | $ 6.9 | $ 6.4
Share-based compensation | 0.9 | 0.5 | $ 0.6
Stock Appreciation Rights (SARs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Deferred Compensation Liability, Current and Noncurrent | $ 0.9 | $ 0.4 |

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