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Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Liability for unrecognized tax benefits | $ 10.7 |  | $ 10.7 |  | $ 17.8
Increase in unrecognized tax benefits |  |  | (7.1) |  |
Unrecognized tax benefits that would impact effective tax rate | 9.5 |  | 9.5 |  |
Anticipated decrease in unrecognized tax benefits within the next twelve months | 0.4 |  | 0.4 |  |
Income tax benefit | $ 12.0 | $ 17.6 | 17.5 | $ 28.0 |
Coronavirus Aid, Relief, And Economic Security Act (CARES Act) |  |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |  |
Income tax benefit |  |  | $ 14.7 |  |

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