Income Taxes (Narrative) (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 Taxes [Abstract]
Total income tax provision	$ 24.4	$ 11.8	$ 68.2	$ 34.0
Effective tax rate			25.20%
Unrecognized tax benefits	1.7		$ 1.7		$ 1.7
Accrued interest and penalties	$ 0.4		$ 0.4		$ 0.3