Income Taxes (Income Tax Components) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 29.9	$ 20.6	$ 33.6
State	8.6	10.6	7.7
Foreign	4.6	3.9	2.8
Total Current	43.1	35.1	44.1
Deferred:
Federal & State	19.9	11.5	(4.7)
Foreign	(1.0)	(0.4)	(0.2)
Total Deferred	18.9	11.1	(4.9)
Total	$ 62.0	$ 46.2	$ 39.2