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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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Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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