Fair Value (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
U.S. corporate securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	$ 7,305	$ 6,861	$ 6,784	$ 7,149
Earnings [Abstract]
Net Investment Income	2	2	4	5
Net Investment Gains (Losses)	12	(15)	11	(12)
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	10	91	(20)	138
Purchases	452	434	1,111	778
Sales	(381)	(313)	(555)	(534)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	92	64	203	54
Transfers Out of Level 3	(98)	(253)	(144)	(707)
Balance, End of Period	7,394	6,871	7,394	6,871
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	2	2	5	5
Net Investment Gains (Losses)	(1)	(27)	(2)	(27)
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Foreign corporate securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	4,646	5,534	4,370	5,726
Earnings [Abstract]
Net Investment Income	5	(3)	10	3
Net Investment Gains (Losses)	(14)	(30)	(55)	(18)
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	(7)	105	90	186
Purchases	752	1,553	1,049	1,817
Sales	(349)	(960)	(451)	(1,463)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	129	53	132	39
Transfers Out of Level 3	(349)	(408)	(332)	(446)
Balance, End of Period	4,813	5,844	4,813	5,844
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	5	7	10	13
Net Investment Gains (Losses)	(15)	(18)	(26)	(19)
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Foreign government debt securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	2,213	3,186	2,322	3,134
Earnings [Abstract]
Net Investment Income	(5)	(1)	1	8
Net Investment Gains (Losses)	(6)	(5)	(7)	(23)
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	(29)	(50)	(8)	24
Purchases	469	178	634	385
Sales	(82)	(129)	(235)	(228)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	37	199	60	133
Transfers Out of Level 3	(211)	(217)	(381)	(272)
Balance, End of Period	2,386	3,161	2,386	3,161
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	(5)	9	1	16
Net Investment Gains (Losses)	0	(1)	0	(10)
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
RMBS [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	2,246	1,384	1,602	2,541
Earnings [Abstract]
Net Investment Income	6	3	12	6
Net Investment Gains (Losses)	(4)	(6)	(4)	(12)
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	35	(4)	40	41
Purchases	349	30	892	42
Sales	(189)	(76)	(194)	(137)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	37	298	27	263
Transfers Out of Level 3	(117)	(130)	(12)	(1,245)
Balance, End of Period	2,363	1,499	2,363	1,499
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	6	3	12	6
Net Investment Gains (Losses)	(3)	(6)	(3)	(12)
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
U.S. Treasury and agency securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	24	76	31	79
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	1	0	0	0
Purchases	50	1	50	1
Sales	(1)	(1)	(7)	(1)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	(50)	0	(53)
Balance, End of Period	74	26	74	26
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
CMBS [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	762	791	753	1,011
Earnings [Abstract]
Net Investment Income	1	18	7	11
Net Investment Gains (Losses)	(18)	22	(36)	68
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	20	(12)	20	87
Purchases	448	171	458	171
Sales	(128)	(116)	(182)	(508)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	21	24	18	45
Transfers Out of Level 3	(68)	(117)	0	(104)
Balance, End of Period	1,038	781	1,038	781
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	1	17	2	11
Net Investment Gains (Losses)	(9)	0	(9)	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
ABS [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	2,198	3,393	1,850	3,026
Earnings [Abstract]
Net Investment Income	4	5	10	12
Net Investment Gains (Losses)	1	(5)	2	(13)
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	5	10	(14)	78
Purchases	699	130	1,124	278
Sales	(180)	(224)	(246)	(339)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	1	108	2	109
Transfers Out of Level 3	(48)	(2,031)	(48)	(1,765)
Balance, End of Period	2,680	1,386	2,680	1,386
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	4	5	9	12
Net Investment Gains (Losses)	0	(2)	0	(4)
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
State and political subdivision securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	82	46	53	46
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	0	(6)	4	(7)
Purchases	0	43	20	45
Sales	(6)	0	(1)	(3)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	0	10	0	10
Transfers Out of Level 3	0	(4)	0	(2)
Balance, End of Period	76	89	76	89
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other fixed maturity securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	0	4	0	4
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	0	0	0	0
Purchases	0	0	0	0
Sales	0	(2)	0	(2)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	0	2	0	2
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Common Stock [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	268	359	281	268
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	1	3	(9)	5
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	(4)	8	9	(13)
Purchases	36	27	52	67
Sales	(22)	(12)	(43)	(18)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	3	2	5	1
Transfers Out of Level 3	0	(82)	(13)	(5)
Balance, End of Period	282	305	282	305
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	(1)	(4)	(9)	(4)
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Non-redeemable preferred stock [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	446	946	438	905
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	(70)	0	(70)
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	(7)	71	18	101
Purchases	5	2	5	3
Sales	(12)	(295)	(29)	(296)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	0	0	0	11
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	432	654	432	654
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	(32)	0	(32)
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Actively traded securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	13	40	0	10
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	0	0	0	0
Purchases	13	0	13	0
Sales	(13)	(23)	0	(8)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	(15)	0	0
Balance, End of Period	13	2	13	2
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
FVO general account securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	30	62	23	77
Earnings [Abstract]
Net Investment Income	(4)	4	3	8
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	0	0	0	0
Purchases	0	0	0	1
Sales	0	(12)	0	(32)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	26	54	26	54
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	(4)	2	3	5
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
FVO contractholder-directed unit-linked investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	1,237	566	1,386	735
Earnings [Abstract]
Net Investment Income	(46)	22	(31)	54
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	0	0	0	0
Purchases	833	315	844	325
Sales	(897)	(305)	(1,070)	(450)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	5	35	5	124
Transfers Out of Level 3	(36)	(10)	(38)	(165)
Balance, End of Period	1,096	623	1,096	623
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	(42)	23	(27)	47
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Short-term Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	462	742	590	858
Earnings [Abstract]
Net Investment Income	1	2	0	4
Net Investment Gains (Losses)	0	0	0	(1)
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	(10)	3	(10)	10
Purchases	571	333	641	618
Sales	(307)	(351)	(396)	(754)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	0	3	0	3
Transfers Out of Level 3	0	0	(108)	(6)
Balance, End of Period	717	732	717	732
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	2	2	2	3
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Mortgage loans held-for-sale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	1,708	25	1,414	24
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	(15)	(1)	(3)	(3)
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	0	0	0	0
Purchases	0	1	0	1
Sales	(1,608)	0	(1,323)	0
Issuances	106	0	113	1
Settlements	(31)	0	(41)	0
Transfers Into Level 3	54	9	54	13
Transfers Out of Level 3	(3)	(2)	(3)	(4)
Balance, End of Period	211	32	211	32
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	4	(1)	3	(3)
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
MSR's [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	727	1,029	666	950
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	(130)	(75)	(85)	(18)
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	0	0	0	0
Purchases	0	0	0	0
Sales	(49)	0	(49)	0
Issuances	46	37	104	92
Settlements	(30)	(27)	(72)	(60)
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	564	964	564	964
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	(121)	(73)	(70)	(18)
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Separate account assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	1,382	2,004	1,325	1,983
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	23	(4)	78	46
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	0	0	0	0
Purchases	191	160	293	358
Sales	(116)	(203)	(255)	(364)
Issuances	2	0	2	0
Settlements	(1)	0	(4)	0
Transfers Into Level 3	2	1	23	9
Transfers Out of Level 3	(38)	(122)	(17)	(196)
Balance, End of Period	1,445	1,836	1,445	1,836
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Interest rate contracts [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	142	(89)	300	(86)
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	22	5	24	12
Other Revenues	(4)	(2)	(67)	7
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	98	19	11	7
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(30)	0	(40)	0
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	(7)
Balance, End of Period	228	(67)	228	(67)
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	15	4	6	11
Other Revenues	0	11	0	12
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Foreign currency contracts [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	54	39	44	73
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	(9)	1	7	(4)
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	0	0	0	0
Purchases	0	0	0	6
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(5)	0	(11)	0
Transfers Into Level 3	0	9	0	0
Transfers Out of Level 3	0	0	0	(26)
Balance, End of Period	40	49	40	49
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	(8)	1	(5)	(4)
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Credit contracts [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	38	43	1	44
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	(14)	(2)	29	4
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	0	6	0	2
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	(3)	(3)
Settlements	0	(5)	(3)	(5)
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	24	42	24	42
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	(14)	(3)	27	4
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Equity market contracts [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	393	(16)	889	142
Earnings [Abstract]
Net Investment Income	(1)	0	(1)	(3)
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	225	(17)	(284)	(110)
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	(4)	0	12	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	1	0	(2)	0
Purchases	10	88	10	106
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(49)	0	(49)	(5)
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	(75)
Balance, End of Period	575	55	575	55
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	(1)	0	(1)	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	198	(17)	(287)	(110)
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	(4)	0	12	0
Other Expenses	0	0	0	0
Net Embedded Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	(2,413)	(1,538)	(4,203)	(2,438)
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	(1,362)	(383)	511	592
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	42	10	(5)	(8)
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	(64)	(50)	39	(2)
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(164)	(113)	(303)	(218)
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	(3,961)	(2,074)	(3,961)	(2,074)
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	(1,366)	(387)	498	581
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	42	10	(4)	(8)
Other Expenses	0	0	0	0
Long Term Debt Of Consolidated Securitization Entities Estimated Fair Value [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	(82)	(138)	(116)	(184)
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	1	(53)	(9)	(7)
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	0	0	0	0
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	57	44	57
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	(81)	(134)	(81)	(134)
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	1	(53)	(9)	(7)
Net Derivative Gains (Losses)	0	0	0	0
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Liability Related To Securitized Reverse Residential Mortgage Loans [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	(1,505)		(1,175)
Earnings [Abstract]
Net Investment Income	0		0
Net Investment Gains (Losses)	0		0
Net Derivative Gains (Losses)	0		0
Other Revenues	1		2
Policyholder Benefits and Claims	0		0
Other Expenses	0		0
Other Comprehensive Income (Loss)	0		0
Purchases	0		0
Sales	1,484		1,147
Issuances	(98)		(98)
Settlements	20		26
Transfers Into Level 3	0		0
Transfers Out of Level 3	0		0
Balance, End of Period	(98)		(98)
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0		0
Net Investment Gains (Losses)	0		0
Net Derivative Gains (Losses)	0		0
Other Revenues	0		0
Policyholder Benefits and Claims	0		0
Other Expenses	$ 0		$ 0