Fair Value (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
U.S. corporate securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	$ 7,394	$ 6,871	$ 6,784	$ 7,149
Earnings [Abstract]
Net Investment Income	5	4	10	8
Net Investment Gains (Losses)	(6)	26	4	14
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)	323	227	351	372
Purchases	442	455	1,371	1,016
Sales	(348)	(185)	(865)	(674)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	128	0	266	43
Transfers Out of Level 3	(239)	(27)	(222)	(557)
Balance, End of Period	7,699	7,371	7,699	7,371
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	3	4	8	7
Net Investment Gains (Losses)	(3)	(3)	(6)	(30)
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	4,813	5,844	4,370	5,726
Earnings [Abstract]
Net Investment Income	5	9	16	22
Net Investment Gains (Losses)	(13)	2	(68)	(20)
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)	135	(120)	233	44
Purchases	630	199	1,535	1,571
Sales	(276)	(447)	(708)	(1,770)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	172	172	254	165
Transfers Out of Level 3	(156)	(930)	(322)	(1,009)
Balance, End of Period	5,310	4,729	5,310	4,729
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	5	8	18	22
Net Investment Gains (Losses)	(10)	(5)	(27)	(20)
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	2,386	3,161	2,322	3,134
Earnings [Abstract]
Net Investment Income	4	9	4	38
Net Investment Gains (Losses)	6	(206)	(1)	(220)
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)	43	302	26	332
Purchases	370	427	1,003	1,164
Sales	(254)	(30)	(467)	(411)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	51	498	53	91
Transfers Out of Level 3	(16)	(272)	(350)	(239)
Balance, End of Period	2,590	3,889	2,590	3,889
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	5	9	12	36
Net Investment Gains (Losses)	0	(205)	0	(209)
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	2,363	1,499	1,602	2,541
Earnings [Abstract]
Net Investment Income	8	2	20	8
Net Investment Gains (Losses)	(3)	0	(7)	(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)	108	(52)	149	(11)
Purchases	249	208	1,060	251
Sales	(114)	(49)	(315)	(247)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	11	1	76	81
Transfers Out of Level 3	(49)	0	(12)	(1,001)
Balance, End of Period	2,573	1,609	2,573	1,609
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	8	2	20	8
Net Investment Gains (Losses)	0	0	(3)	(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
U.S. Treasury and agency securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	74	26	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)	0	2	0	2
Purchases	0	0	49	0
Sales	0	(3)	(6)	(1)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	0	6	0	6
Transfers Out of Level 3	0	0	0	(55)
Balance, End of Period	74	31	74	31
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	1,038	781	753	1,011
Earnings [Abstract]
Net Investment Income	0	5	7	21
Net Investment Gains (Losses)	(1)	(1)	(37)	67
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	(1)	21	50
Purchases	416	115	695	287
Sales	(249)	(57)	(253)	(584)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	26	1	40	85
Transfers Out of Level 3	(23)	(11)	(12)	(105)
Balance, End of Period	1,214	832	1,214	832
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0	6	2	19
Net Investment Gains (Losses)	0	(2)	(4)	(2)
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	2,680	1,386	1,850	3,026
Earnings [Abstract]
Net Investment Income	4	6	14	18
Net Investment Gains (Losses)	0	(5)	2	(22)
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)	32	11	19	90
Purchases	215	431	1,293	754
Sales	(47)	(94)	(286)	(471)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	2	184	6	123
Transfers Out of Level 3	(36)	(147)	(48)	(1,746)
Balance, End of Period	2,850	1,772	2,850	1,772
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	4	6	14	18
Net Investment Gains (Losses)	0	(7)	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
State and political subdivision securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	76	89	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)	1	(1)	4	(8)
Purchases	15	11	15	11
Sales	(6)	(1)	(7)	(4)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	0	0	0	10
Transfers Out of Level 3	(21)	(45)	0	(2)
Balance, End of Period	65	53	65	53
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	2	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	0
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	(4)
Balance, End of Period	0	0	0	0
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	282	305	281	268
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	8	3	(1)	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)	(2)	(25)	7	(12)
Purchases	76	14	111	53
Sales	(102)	(14)	(126)	(21)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	0	0	3	1
Transfers Out of Level 3	0	(44)	(13)	(57)
Balance, End of Period	262	239	262	239
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)	0	(11)	(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	432	654	438	905
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	1	7	1	(63)
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	(69)	23	31
Purchases	1	0	5	4
Sales	(60)	(84)	(89)	(379)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	48	1	48	11
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	426	509	426	509
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	(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
Actively traded securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	13	2	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	14	0	14	0
Sales	(11)	0	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	(2)	0	0	0
Balance, End of Period	14	2	14	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	26	54	23	77
Earnings [Abstract]
Net Investment Income	7	(12)	10	(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
Other Comprehensive Income (Loss)	0	0	0	0
Purchases	0	0	0	1
Sales	(2)	0	(2)	(33)
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	(15)
Balance, End of Period	31	27	31	27
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	6	(11)	9	(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	1,096	623	1,386	735
Earnings [Abstract]
Net Investment Income	32	(5)	12	61
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	903	1,026	918	1,032
Sales	(909)	(297)	(1,159)	(447)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	1	0	2	123
Transfers Out of Level 3	(2)	(84)	(38)	(241)
Balance, End of Period	1,121	1,263	1,121	1,263
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	6	(4)	1	55
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	717	732	590	858
Earnings [Abstract]
Net Investment Income	1	(1)	1	3
Net Investment Gains (Losses)	0	(1)	0	(2)
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)	15	(1)	10	7
Purchases	515	266	1,059	562
Sales	(337)	(368)	(455)	(798)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	186	0	0	0
Transfers Out of Level 3	0	(1)	(108)	(4)
Balance, End of Period	1,097	626	1,097	626
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0	(1)	(1)	(2)
Net Investment Gains (Losses)	0	(1)	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
Mortgage loans held-for-sale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	211	32	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	(23)	(1)	(31)	(2)
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	0	0	0	0
Purchases	0	2	1	3
Sales	(145)	0	(1,348)	0
Issuances	2	0	6	1
Settlements	(10)	(2)	(46)	(3)
Transfers Into Level 3	30	4	72	9
Transfers Out of Level 3	(1)	(5)	(4)	(2)
Balance, End of Period	64	30	64	30
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	(22)	(1)	(25)	(2)
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	564	964	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	(37)	(292)	(122)	(310)
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	4	46	109	138
Settlements	(41)	(32)	(163)	(92)
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	490	686	490	686
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	(24)	(280)	(88)	(298)
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	1,445	1,836	1,325	1,983
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	18	3	95	48
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	144	187	294	422
Sales	(74)	(152)	(289)	(502)
Issuances	0	0	1	0
Settlements	0	(1)	(3)	(3)
Transfers Into Level 3	2	11	25	18
Transfers Out of Level 3	(128)	(176)	(41)	(258)
Balance, End of Period	1,407	1,708	1,407	1,708
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	228	(67)	300	(86)
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	(7)	21	16	25
Other Revenues	0	68	(67)	75
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	(16)	317	13	325
Purchases	0	(1)	0	(1)
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	12	(41)	(45)	(40)
Transfers Into Level 3	0	1	0	0
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	217	298	217	298
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)	(4)	17	2	14
Other Revenues	0	79	0	80
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	40	49	44	73
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	20	2	30	(1)
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	16	0	21
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(2)	0	(16)	0
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	(26)
Balance, End of Period	58	67	58	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)	19	2	10	(1)
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	24	42	1	44
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	16	(76)	44	(70)
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	15	0	13
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	(3)	(3)
Settlements	0	(11)	(3)	(13)
Transfers Into Level 3	0	0	0	(1)
Transfers Out of Level 3	0	0	1	0
Balance, End of Period	40	(30)	40	(30)
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)	16	(76)	43	(70)
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	575	55	889	142
Earnings [Abstract]
Net Investment Income	0	0	0	(3)
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	(187)	677	(470)	568
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	11	0	22	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	1	1	(1)	0
Purchases	7	119	16	225
Sales	0	0	0	0
Issuances	0	(4)	0	(4)
Settlements	(82)	2	(131)	(3)
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	(75)
Balance, End of Period	325	850	325	850
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)	(195)	677	(474)	569
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	10	0	22	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	(3,961)	(2,074)	(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)	291	(2,314)	802	(1,722)
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	(4)	115	(9)	107
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	(78)	(114)	(39)	(116)
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(170)	(121)	(473)	(339)
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	(3,922)	(4,508)	(3,922)	(4,508)
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)	283	(2,319)	781	(1,738)
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	(3)	115	(7)	107
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	(81)	(134)	(116)	(184)
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	7	(1)	(2)	(8)
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	26	23	70	80
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	(48)	(112)	(48)	(112)
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)	7	(1)	(2)	(8)
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	(98)		(1,175)
Earnings [Abstract]
Net Investment Income	0		0
Net Investment Gains (Losses)	0		0
Net Derivative Gains (Losses)	0		0
Other Revenues	0		1
Policyholder Benefits and Claims	0		0
Other Expenses	0		0
Other Comprehensive Income (Loss)	0		0
Purchases	0		0
Sales	97		1,149
Issuances	0		0
Settlements	1		23
Transfers Into Level 3	0		0
Transfers Out of Level 3	0		2
Balance, End of Period	0		0
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