Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 130.6	$ 157.5	$ 366.5
State	56.8	50.0	72.0
Foreign	94.5	75.3	77.9
Deferred:
Federal	28.0	(56.7)	(47.1)
State	(26.6)	(5.2)	(2.2)
Foreign	5.1	5.0	(49.7)
Total	$ 288.4	$ 225.9	$ 417.4