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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, 2013	Mar. 31, 2012
Net Periodic Interest Rate Costs on Swaps	$ 133	$ 91
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion	$ 84	$ 39

- Definition

The effective portion of gain reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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