Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Income Taxes [Abstract]
Total income tax provision	$ 27.6	$ 13.5	$ 43.8	$ 22.2
Effective tax rate			25.60%
Unrecognized tax benefits	1.7		$ 1.7		$ 1.7
Accrued interest and penalties	$ 0.4		$ 0.4		$ 0.3