Fair Value (Changes In The Estimated Fair Value Of The Financial Assets And Liabilities Measured On A Recurring Basis) (Details) (USD $) In Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011
Beginning Balance	$ (0.3)	$ 17.6
Included in other income	0.3	5.7
Other, net (primarily proceeds)		(23.3)
Ending Balance	0	0
Derivatives [Member]
Beginning Balance	(0.3)	(0.3)
Included in other income	0.3	0.3
Other, net (primarily proceeds)		0
Ending Balance	0	0
Equity Securities Available for Sale [Member]
Beginning Balance	0	17.9
Included in other income	0	5.4
Other, net (primarily proceeds)		(23.3)
Ending Balance	$ 0	$ 0