Equity Changes in AOCI (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 1,575		$ 1,038		$ 1,203		$ 384
OCI before reclassifications	221		233		561		880
Amounts reclassified from OCI	(176)		(67)		(144)		(60)
Total other comprehensive income	45		166		417		820
Ending balance	1,620		1,204		1,620		1,204
Available-for-Sale Securities [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	1,999	[1]	1,582	[1]	1,627	[1]	934	[1]
OCI before reclassifications	221	[1]	88	[1]	561	[1]	735	[1]
Amounts reclassified from OCI	(176)	[1]	(71)	[1]	(144)	[1]	(70)	[1]
Total other comprehensive income	45	[1]	17	[1]	417	[1]	665	[1]
Ending balance	2,044	[1]	1,599	[1]	2,044	[1]	1,599	[1]
Accumulated Other Comprehensive Income (Loss), Other [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(424)		(544)	[2]	(424)		(550)	[2]
OCI before reclassifications	0		145	[2]	0		145	[2]
Amounts reclassified from OCI	0		4	[2]	0		10	[2]
Total other comprehensive income	0		149	[2]	0		155	[2]
Ending balance	$ (424)		$ (395)	[2]	$ (424)		$ (395)	[2]

[1] The amounts reclassified from AOCI represent the gain or loss recognized in earnings due to a sale of an AFS security or the recognition of a net impairment recognized in earnings, which are recorded in “Investments gains, net” and “Net other-than-temporary impairments,” respectively, in our condensed consolidated statements of operations.

[2] The amounts reclassified from AOCI represent activity from our defined benefit pension plans, which is recorded in “Salaries and employee benefits” in our condensed consolidated statements of operations.