Income Taxes (Components Of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current
Federal	$ 214.3	$ 195.4	$ 177.4
State	46.7	47.5	41.6
Foreign	34.1	28.1	22.1
Income tax expense	295.1	271.0	241.1
Deferred
Federal	(11.4)	1.8	11.3
State	(1.7)	(0.5)	0.2
Foreign	0.8	1.3	0.2
Income tax expense	(12.3)	2.6	11.7
Total
Federal	202.9	197.2	188.7
State	45.0	47.0	41.8
Foreign	34.9	29.4	22.3
Total income tax expense	$ 282.8	$ 273.6	$ 252.8