Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Effective tax rate (percent)	8.10%	18.60%	23.10%	18.50%
Unrecognized tax benefits	$ 14.9		$ 14.9
Unrecognized tax benefits that would affect the effective tax rate if recognized	14.5		14.5
Unrecognized tax benefits, accrual for payment of interest	$ 1.1		$ 1.1