Servicing Activities (Schedule Of Servicing Assets at Fair Value) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Servicing Activities [Abstract]
Estimated fair value, Beginning Balance	$ 0	$ 952
Servicing Asset at Fair Value, Additions	0	54
Servicing Asset at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs or Changes in Assumptions	0	(28)
Servicing Asset at Fair Value, Other Changes in Fair Value	0	(61)
Estimated fair value, Ending Balance	$ 0	$ 917