Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 17.3	$ (47.3)	$ 16.5	$ (37.4)
Decrease in valuation allowance	$ 3.8		$ 55.2
GILTI tax benefit		$ 42.0		$ 42.0