Commitments, Contingencies, Guarantees, and Others - Schedule of Changes in Representation and Warranty Reserve (Details) (Subsidiaries, Representation and Warranty Liability, USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Loss Contingency Accrual [Roll Forward]
Representation and warranty repurchase reserve, beginning of period	$ 1,012	$ 1,156	$ 1,172	$ 899
Provision (benefit) for mortgage representation and warranty losses	70	(4)	19	276
Net realized losses	(2)	(7)	(111)	(30)
Representation and warranty repurchase reserve, end of period	1,080	1,145	1,080	1,145
Continuing Operations
Loss Contingency Accrual [Roll Forward]
Provision (benefit) for mortgage representation and warranty losses	0	(13)	(15)	(27)
Discontinued Operations
Loss Contingency Accrual [Roll Forward]
Provision (benefit) for mortgage representation and warranty losses	$ 70	$ 9	$ 34	$ 303