Equity Activity in OCI (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Equity [Abstract]
Net income	$ 5,325	$ 58,685
Other comprehensive income, net of tax effect:
Changes in net unrealized gains on AFS securities (net of tax of $184 and $349, respectively)	340	649
Reclassification adjustment for OTTI recognized in net income (net of tax of $18 and $3, respectively)	33	5
Reclassification adjustment for gains on AFS securities included in net income (net of tax of $- and $3)	(1)	(6)
Other	0	6
Total other comprehensive income	372	654
Total comprehensive income	5,697	59,339
Other Comprehensive (Income) Loss Parenthetical Disclosures [Abstract]
Changes in net unrealized gains on AFS securities, tax	184	349
Reclassification adjustment for OTTI recognized in net income, tax	18	3
Reclassification adjustment for gains on AFS securities included in net income, tax	$ 0	$ 3