Equity OCI - 1 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Equity [Abstract]
Net income (loss)	$ 10,095		$ 5,119		$ 68,780		$ 7,837
Other comprehensive income, net of tax effect:
Changes in net unrealized gains (losses) on available-for-sale securities (net of tax of $47 and $46, respectively for the three months ended and net of tax of $396 and $150 respectively, for the six months ended)	88		(64)		735		255
Reclassification adjustment for other-than-temporary impairments recognized in net income (net of tax of $2 and $210, respectively, for the three months ended and net of tax of $5 and $232, respectively, for the six months ended)	4		389		10		431
Reclassification adjustment for gains included in net income (net of tax of $40 and $3, respectively, for the three months ended and net of $43 and $6 respectively, for the six months ended)	(75)		(5)		(80)		(11)
Other	149	[1]	8	[1]	155	[1]	15	[1]
Total other comprehensive income (loss)	166		328		820		690
Total comprehensive income (loss)	10,261		5,447		69,600		8,527
OCI, Parenthetical Disclosures [Abstract]
Changes in net unrealized (losses) gains on available-for-sale securities, tax benefit (expense)	47		46		396		150
Reclassification adjustment for other-than-temporary impairments recognized in net income (loss), tax benefit (expense)	2		210		5		232
Reclassification adjustment for gains included in net income (loss), tax benefit (expense)	$ 40		$ 3		$ 43		$ 6

[1] Primarily represents activity from our defined benefit pension plans.