Consolidated Statement Of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net income (loss)	$ 581	$ 137	$ 591	$ (1,138)
Unrealized gains (losses) arising during the period, net of tax of $52, $62, $60 and $98	82	118	126	227
Less: Reclassification adjustments for (gains) losses included in net income (loss), net of tax of $16, $6, $23 and $5	(29)	10	44	(10)
Unrealized gains (losses) on available-for-sale securities, net	53	128	170	217
Other-than-temporary impairments arising during the period, net of tax of $1, $2, $3 and $5	(1)	4	6	9
Less: Reclassification adjustments for other-than-temporary impairments included in net income (loss), net of tax of $3, $6, $18 and $8	6	11	32	15
Other-than-temporary impairments on available-for-sale securities, net	5	15	38	24
Unrealized gains (losses) on derivative instruments arising during the period, net of tax of $2, $1, $0 and $3	3	2		4
Less: Reclassification adjustments for (gains) losses included in net income (loss), net of tax of $1, $0, $9 and $1	1	1	16	2
Unrealized gains (losses) on derivative instruments, net	4	3	16	6
Foreign currency translation, net of tax of $0, $0, $2 and $5			(12)	(36)
Total other comprehensive income (loss)	62	146	212	211
Comprehensive income (loss)	$ 643	$ 283	$ 803	$ (927)