Contingencies And Other Risks (Schedule Of Changes In Reserve And Warranty Obligations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Loss Contingency [Abstract]
Representation And Warranty Obligations Reserve Beginning Balance	$ 170	$ 811	$ 105	$ 825
Provision for mortgage representation and warranty expenses, Loans sales	1	4	5	8
Provision for mortgage representation and warranty expenses, Change in estimate continuing operations	(2)	18	81	37
Provision for mortgage representation and warranty expenses	(1)	22	86	45
Resolved Claims On Unpaid Principal Balance	(18)	(45)	(41)	(87)
Representation And Warranty Obligations Recoveries	1	1	2	6
Other activity impacting Representation and Warranty liability	(127)	(665)	(127)	(665)
Representation And Warranty Obligations Reserve Ending Balance	$ 25	$ 124	$ 25	$ 124