Income Taxes (Unrecognized Tax Benefits And Associated Interest And Penalties) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits, beginning balance	$ 46.1	$ 45.0	$ 43.7
Additions for tax positions related to the current year			17.2
Additions for tax positions related to prior years	2.0	7.5	16.3
Reductions for tax positions due to settlements	(11.2)	(6.1)	(20.0)
Reductions due to a lapse of the statute of limitations		(0.3)	(3.1)
Other reductions for tax positions related to prior years			(9.1)
Unrecognized tax benefits, ending balance	36.9	46.1	45.0
Federal, State and Foreign Tax
Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits, beginning balance	39.9	40.6	37.7
Additions for tax positions related to the current year			17.2
Additions for tax positions related to prior years	(0.1)	4.6	12.4
Reductions for tax positions due to settlements	(9.3)	(5.0)	(15.3)
Reductions due to a lapse of the statute of limitations		(0.3)	(2.7)
Other reductions for tax positions related to prior years			(8.7)
Unrecognized tax benefits, ending balance	30.5	39.9	40.6
Accrued Interest and Penalties
Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits, beginning balance	6.2	4.4	6.0
Additions for tax positions related to the current year
Additions for tax positions related to prior years	2.1	2.9	3.9
Reductions for tax positions due to settlements	(1.9)	(1.1)	(4.7)
Reductions due to a lapse of the statute of limitations			(0.4)
Other reductions for tax positions related to prior years			(0.4)
Unrecognized tax benefits, ending balance	$ 6.4	$ 6.2	$ 4.4