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Income Taxes (Narratives) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Operating Loss Carryforwards [Line Items] |  |  |  |
U.S. federal statutory tax rate | 21.00% | 21.00% | 35.00% |
Operating Loss Carryforwards, Valuation Allowance | $ 0.8 | $ 1.0 |  |
Accumulated net earning | 744.7 | 586.1 |  |
Gross deferred tax assets | 58.3 | 32.5 |  |
Gross deferred tax liabilities | 156.2 | 111.3 |  |
Unrecognized Tax Benefits | 1.3 | $ 0.4 | $ 0.4 | $ 1.3
Internal Revenue Service (IRS) [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards | 0.0 |  |  |
Foreign Tax Authority [Member] |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Operating loss carryforwards | 0.8 |  |  |
Accumulated net earning | $ 16.7 |  |  |

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