Income Taxes (Unrecognized Tax Benefits And Associated Interest And Penalties) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits, beginning balance	$ 43.5	$ 44.2	$ 36.9
Additions for tax positions related to prior years	8.6	1.0	3.5
Additions for tax positions related to current year	6.1		3.8
Reductions for tax positions due to settlements	(48.2)	(1.7)
Unrecognized tax benefits, ending balance	10.0	43.5	44.2
Federal, State and Foreign Tax
Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits, beginning balance	36.3	37.1	30.5
Additions for tax positions related to prior years	7.3	0.6	3.1
Additions for tax positions related to current year	6.1		3.5
Reductions for tax positions due to settlements	(40.4)	(1.4)
Unrecognized tax benefits, ending balance	9.3	36.3	37.1
Accrued Interest and Penalties
Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits, beginning balance	7.2	7.1	6.4
Additions for tax positions related to prior years	1.3	0.4	0.4
Additions for tax positions related to current year			0.3
Reductions for tax positions due to settlements	(7.8)	(0.3)
Unrecognized tax benefits, ending balance	$ 0.7	$ 7.2	$ 7.1