Consolidated Statement Of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income (Loss)
Net income (loss)	$ 173	$ 132	$ 549	$ 118
Unrealized gains (losses) on available-for-sale securities: [Abstract]
Unrealized gains (losses) arising during the period	1	(15)	185	(155)
Provision (benefit) for income taxes	0	(6)	64	(55)
Total	1	(9)	121	(100)
Reclassification adjustments for (gains) losses included in net income (loss)	0	13	15	(6)
Provision (benefit) for income taxes	0	5	6	(2)
Total	0	8	9	(4)
Available-for-sale securities with other-than-temporary impairments: [Abstract]
Other-than-temporary impairments and unrealized gains (losses) arising during the period	(79)	8	(80)	15
Provision (benefit) for income taxes	(28)	2	(29)	6
Total	(51)	6	(51)	9
Reclassification adjustments for (gains) losses included in net income (loss)	0	(1)	7	(5)
Provision (benefit) for income taxes	0	(1)	2	(2)
Total	0	0	5	(3)
Foreign currency translation: [Abstract]
Foreign currency translation gains (losses)	(30)	32	(23)	(7)
Provision (benefit) for income taxes	(10)	1	(7)	1
Total	(20)	31	(16)	(8)
Reclassification adjustments for (gains) losses included in net income (loss)	0	0	4	0
Provision (benefit) for income taxes	0	0	0	0
Total	0	0	4	0
Total other comprehensive income (loss)	(70)	36	72	(106)
Comprehensive income (loss)	$ 103	$ 168	$ 621	$ 12