Equity Changes in AOCI (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 1,203		$ 384
OCI before reclassifications	340		649
Amounts reclassified from OCI	32		5
Total other comprehensive income	372		654
Ending balance	1,575		1,038
Available-for-Sale Securities [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	1,627	[1]	934	[1]
OCI before reclassifications	340	[1]	649	[1]
Amounts reclassified from OCI	32	[1]	(1)	[1]
Total other comprehensive income	372	[1]	648	[1]
Ending balance	1,999	[1]	1,582	[1]
Accumulated Other Comprehensive Income (Loss), Other [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(424)	[2]	(550)	[2]
OCI before reclassifications	0	[2]	0	[2]
Amounts reclassified from OCI	0	[2]	6	[2]
Total other comprehensive income	0	[2]	6	[2]
Ending balance	$ (424)	[2]	$ (544)	[2]

[1] The amounts reclassified from AOCI represent the gain or loss recognized in earnings due to a sale of an available-for-sale 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] Primarily represents activity from our defined benefit pension plans, which is recorded in “Salaries and employee benefits” in our condensed consolidated statements of operations.