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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Income tax benefit	$ (13.6)	$ (22.5)	$ (2.4)	$ (63.1)
Effective income tax rate, continuing operations	85.00%	(23.80%)	(4.80%)	9.60%
Unrecognized tax benefit liability, including penalties and accrued interest	$ 22.3		$ 22.3		$ 22.2
UNITED STATES
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		$ (36.0)
CARES Act [Member]
Other Tax Expense (Benefit)	$ (5.2)	$ (7.0)		$ (7.5)
Settlement with Taxing Authority [Member]
Other Tax Expense (Benefit)				$ (6.8)

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