Debt (Gain Or Loss On The Hedged Item And Offsetting Gain Or Loss On Interest Rate Swaps) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Other Operating expenses	$ (2,919)	$ (3,146)	$ (2,871)
Derivative Instruments, Gain (Loss) Recognized in Income, Net	0
Gain On Swaps [Member]
Other Operating expenses	7
Loss On Notes [Member]
Other Operating expenses	$ (7)