Servicing Activities (Schedule Of Servicing Assets at Fair Value) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Servicing Activities [Abstract]
Estimated fair value, Beginning Balance	$ 0	$ 1,105	$ 952	$ 2,519
Servicing Asset at Fair Value, Additions	0	50	60	167
Servicing Asset at Fair Value, Disposals			(911)	0
Servicing Asset at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs or Changes in Assumptions	0	(192)	(32)	(330)
Servicing Asset at Fair Value, Other Changes in Fair Value	0	(61)	(69)	(324)
Deconsolidation of subsidiary			0	(1,130)
Estimated fair value, Ending Balance	$ 0	$ 902	$ 0	$ 902