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Income Taxes (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Income Tax Disclosure [Abstract] |  |
Effective income tax rates | 17.40% | (24.50%)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate | 21.00% |
Increase (Decrease) in Effective Tax Rate | 41.90% |
Changes to Liability for Uncertain Tax Positions | $ 0.0 |

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