Derivatives (Schedule Of (Gains) Losses For Derivatives Designated As Fair Value Hedges) (Details) (Investment and Other Income (Expense)- Net [Member], Designated as Hedging Instrument [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Total (gain) loss recognized as ineffectiveness in the consolidated statements of operations	$ (1.0)	$ (0.2)
Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total (gain) loss recognized as ineffectiveness in the consolidated statements of operations	5.2	3.9
Hedged Items [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total (gain) loss recognized as ineffectiveness in the consolidated statements of operations	$ (6.2)	$ (4.1)