Equity Activity in OCI (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013		Sep. 30, 2014	Sep. 30, 2013
Equity [Abstract]
Net income	$ 3,905	$ 8,744	[1]	$ 12,897	$ 77,524	[1]
Other comprehensive income, net of tax effect:
Changes in net unrealized gains on AFS securities (net of tax of $61 and $37, respectively, for the three months ended and net of tax of $364 and $433, respectively, for the nine months ended)	113	70		675	805
Reclassification adjustment for OTTI recognized in net income (net of tax of $2 and $10, respectively, for the three months ended and net of tax of $28 and $15, respectively, for the nine months ended)	4	17		52	27
Reclassification adjustment for gains on AFS securities included in net income (net of tax of $29 and $119, respectively, for the three months ended and net of tax of $133 and $162, respectively, for the nine months ended)	(54)	(220)		(247)	(300)
Other	32	(1)		32	154
Total other comprehensive income (loss)	95	(134)		512	686
Total comprehensive income	4,000	8,610		13,409	78,210
Other Comprehensive (Income) Loss Parenthetical Disclosures [Abstract]
Changes in net unrealized gains on AFS securities, tax	61	37		364	433
Reclassification adjustment for OTTI recognized in net income, tax	2	10		28	15
Reclassification adjustment for gains on AFS securities included in net income, tax	$ 29	$ 119		$ 133	$ 162

[1] Certain prior period amounts have been reclassified to conform to our current period presentation.