Income Taxes (Schedule Of Unrecognized Tax Benefits) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Abstract]
Unrecognized tax benefits balance at January 1	$ 127.2	$ 126.3	$ 57.5
Gross change for current year positions	10.2	4.1	71.5
Increases for prior period positions	7.8	1.4	2.5
Decrease for prior period positions	(6.1)	(3.9)	(2.4)
Decrease due to settlements and payments			(1.8)
Decrease due to statute expirations	(0.7)	(0.7)	(1.0)
Unrecognized tax benefits balance at December 31	$ 138.4	$ 127.2	$ 126.3