Derivative and Other Hedging Instruments (Summary Of Outstanding Forward Contracts Designated As Hedging Instruments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Interest Rate Swap [Member]	Dec. 31, 2013 Interest Rate Swap [Member]
Net Periodic Interest Rate Costs on Swaps	$ 126	$ 133
Notional Amount	8,000		46,400	43,250
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion	$ 83	$ 84