Financial Instruments (Effect Of Derivative Instruments On Consolidated Financial Statements) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Derivative Instruments, Gain (Loss)
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	$ (15.4)	$ 30.2	$ (14.7)	$ 28.2
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion	4.3		10.4
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion		$ (1.8)		$ (2.1)