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
Income Tax Disclosure [Abstract]
Effective income tax rate	99.40%	123.90%	20.80%	33.40%
Unrecognized tax benefits	$ 28.2		$ 28.2		$ 48.3
Unrecognized tax benefits, interest on income taxes accrued	8.5		8.5		$ 10.7
Decrease in unrecognized tax benefits is reasonably possible	$ 26.6		$ 26.6