Fair Value (Unobservable Input Reconciliation) (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
U.S. corporate securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	$ 6,426	$ 7,305	$ 7,433	$ 6,784
Earnings [Abstract]
Net Investment Income	4	2	8	4
Net Investment Gains (Losses)	(29)	12	(32)	11
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)	(169)	10	(9)	(20)
Purchases	553	452	684	1,111
Sales	(281)	(381)	(659)	(555)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	121	92	241	203
Transfers Out of Level 3	(707)	(98)	(1,748)	(144)
Balance, End of Period	5,918	7,394	5,918	7,394
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	3	2	7	5
Net Investment Gains (Losses)	(28)	(1)	(34)	(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
Foreign corporate securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	5,825	4,646	6,208	4,370
Earnings [Abstract]
Net Investment Income	4	5	6	10
Net Investment Gains (Losses)	(3)	(14)	(23)	(55)
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)	(168)	(7)	(161)	90
Purchases	642	752	794	1,049
Sales	(135)	(349)	(413)	(451)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	201	129	185	132
Transfers Out of Level 3	(358)	(349)	(588)	(332)
Balance, End of Period	6,008	4,813	6,008	4,813
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	4	5	5	10
Net Investment Gains (Losses)	0	(15)	(3)	(26)
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	2,203	2,213	1,814	2,322
Earnings [Abstract]
Net Investment Income	2	(5)	8	1
Net Investment Gains (Losses)	0	(6)	5	(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)	(48)	(29)	(47)	(8)
Purchases	234	469	352	634
Sales	(47)	(82)	(74)	(235)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	3	37	91	60
Transfers Out of Level 3	(376)	(211)	(178)	(381)
Balance, End of Period	1,971	2,386	1,971	2,386
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	2	(5)	8	1
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
RMBS [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	2,426	2,246	2,037	1,602
Earnings [Abstract]
Net Investment Income	2	6	10	12
Net Investment Gains (Losses)	4	(4)	2	(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
Other Comprehensive Income (Loss)	14	35	124	40
Purchases	524	349	803	892
Sales	(198)	(189)	(168)	(194)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	49	37	21	27
Transfers Out of Level 3	(86)	(117)	(94)	(12)
Balance, End of Period	2,735	2,363	2,735	2,363
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	9	6	17	12
Net Investment Gains (Losses)	(1)	(3)	(1)	(3)
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	115	24	71	31
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)	(2)	1	(2)	0
Purchases	0	50	0	50
Sales	(42)	(1)	(4)	(7)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	16	0	17	0
Transfers Out of Level 3	(5)	0	0	0
Balance, End of Period	82	74	82	74
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	1,084	762	1,147	753
Earnings [Abstract]
Net Investment Income	0	1	(1)	7
Net Investment Gains (Losses)	(2)	(18)	(2)	(36)
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)	(6)	20	(49)	20
Purchases	184	448	404	458
Sales	(113)	(128)	(333)	(182)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	46	21	139	18
Transfers Out of Level 3	(143)	(68)	(255)	0
Balance, End of Period	1,050	1,038	1,050	1,038
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)	(2)	(9)	(2)	(9)
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	3,766	2,198	3,656	1,850
Earnings [Abstract]
Net Investment Income	5	4	8	10
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)	(37)	5	(62)	(14)
Purchases	359	699	985	1,124
Sales	(256)	(180)	(420)	(246)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	0	1	0	2
Transfers Out of Level 3	(79)	(48)	(409)	(48)
Balance, End of Period	3,758	2,680	3,758	2,680
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	5	4	8	9
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
State and political subdivision securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	53	82	54	53
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	(1)	4
Purchases	17	0	17	20
Sales	(5)	(6)	(5)	(1)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	(23)	0	(24)	0
Balance, End of Period	41	76	41	76
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	189	268	190	281
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	1	0	(9)
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)	(4)	(7)	9
Purchases	8	36	12	52
Sales	(7)	(22)	(9)	(43)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	1	3	1	5
Transfers Out of Level 3	(4)	0	(4)	(13)
Balance, End of Period	183	282	183	282
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	(1)	0	(9)
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	401	446	419	438
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	1	0	(29)	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)	8	(7)	65	18
Purchases	20	5	23	5
Sales	(22)	(12)	(70)	(29)
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	408	432	408	432
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	(20)	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
Actively traded securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	14	13	6	0
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	1	13	3	13
Sales	(4)	(13)	0	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	2	0	2	0
Transfers Out of Level 3	(2)	0	0	0
Balance, End of Period	11	13	11	13
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	44	30	32	23
Earnings [Abstract]
Net Investment Income	2	(4)	5	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	0
Sales	0	0	(5)	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	0	0	14	0
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	46	26	46	26
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	3	(4)	5	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
FVO contractholder-directed unit-linked investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	831	1,237	937	1,386
Earnings [Abstract]
Net Investment Income	(17)	(46)	(24)	(31)
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	341	833	340	844
Sales	(481)	(897)	(427)	(1,070)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	36	5	58	5
Transfers Out of Level 3	(117)	(36)	(291)	(38)
Balance, End of Period	593	1,096	593	1,096
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	(9)	(42)	(12)	(27)
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	2,130	462	429	590
Earnings [Abstract]
Net Investment Income	2	1	2	0
Net Investment Gains (Losses)	4	0	(24)	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)	(38)	(10)	11	(10)
Purchases	247	571	332	641
Sales	(1,783)	(307)	(400)	(396)
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	(218)	0	(6)	(108)
Balance, End of Period	344	717	344	717
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	1	2	1	2
Net Investment Gains (Losses)	1	0	1	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
Residential Mortgage Loans Held For Investment [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	0	0	0	0
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	150	0	150	0
Sales	0	0	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	0
Balance, End of Period	150	0	150	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
Mortgage loans held-for-sale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	2	1,708	49	1,414
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	(15)	0	(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	0	0	0
Sales	(2)	(1,608)	(45)	(1,323)
Issuances	0	106	0	113
Settlements	0	(31)	(4)	(41)
Transfers Into Level 3	0	54	0	54
Transfers Out of Level 3	0	(3)	0	(3)
Balance, End of Period	0	211	0	211
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	4	0	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		666
Earnings [Abstract]
Net Investment Income		0		0
Net Investment Gains (Losses)		0		0
Net Derivative Gains (Losses)		0		0
Other Revenues		(130)		(85)
Policyholder Benefits and Claims		0		0
Other Expenses		0		0
Other Comprehensive Income (Loss)		0		0
Purchases		0		0
Sales		(49)		(49)
Issuances		46		104
Settlements		(30)		(72)
Transfers Into Level 3		0		0
Transfers Out of Level 3		0		0
Balance, End of Period		564		564
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		(121)		(70)
Policyholder Benefits and Claims		0		0
Other Expenses		0		0
Separate account assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	1,219	1,382	1,205	1,325
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	(15)	23	0	78
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	117	191	175	293
Sales	(39)	(116)	(78)	(255)
Issuances	0	2	0	2
Settlements	(19)	(1)	(28)	(4)
Transfers Into Level 3	5	2	7	23
Transfers Out of Level 3	(43)	(38)	(56)	(17)
Balance, End of Period	1,225	1,445	1,225	1,445
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	144	142	177	300
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	(26)	22	(22)	24
Other Revenues	0	(4)	0	(67)
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	(7)	98	(31)	11
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(12)	(30)	(25)	(40)
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	(1)	0	(1)	0
Balance, End of Period	98	228	98	228
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)	(21)	15	(17)	6
Other Revenues	0	0	0	0
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	30	54	37	44
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	(25)	(9)	(34)	7
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	0	1	0
Purchases	2	0	2	0
Sales	0	0	0	0
Issuances	(1)	0	(1)	0
Settlements	(2)	(5)	1	(11)
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	6	40	6	40
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)	(26)	(8)	(34)	(5)
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	38	43	1
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	(10)	(14)	(15)	29
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	0	0	0	0
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	(3)	0	(3)	0
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	(3)
Settlements	0	0	0	(3)
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	25	24	25	24
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)	(10)	(14)	(15)	27
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	(139)	393	128	889
Earnings [Abstract]
Net Investment Income	0	(1)	0	(1)
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	(33)	225	(305)	(284)
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	(3)	(4)	9	12
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	0	1	0	(2)
Purchases	4	10	4	10
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	(49)	(7)	(49)
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	(171)	575	(171)	575
Changes in unrealized gains (losses) relating to assets still held at end of period included in earnings [Abstract]
Net Investment Income	0	(1)	0	(1)
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	(34)	198	(305)	(287)
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	(3)	(4)	10	12
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	(1,584)	(2,413)	(3,162)	(4,203)
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	0	0	0
Net Derivative Gains (Losses)	1,031	(1,362)	2,721	511
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	(33)	42	(80)	(5)
Other Expenses	0	0	0	0
Other Comprehensive Income (Loss)	105	(64)	209	39
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(197)	(164)	(366)	(303)
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	(678)	(3,961)	(678)	(3,961)
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)	1,024	(1,366)	2,707	498
Other Revenues	0	0	0	0
Policyholder Benefits and Claims	(31)	42	(77)	(4)
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	(31)	(82)	(44)	(116)
Earnings [Abstract]
Net Investment Income	0	0	0	0
Net Investment Gains (Losses)	0	1	(1)	(9)
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	0	14	44
Transfers Into Level 3	0	0	0	0
Transfers Out of Level 3	0	0	0	0
Balance, End of Period	(31)	(81)	(31)	(81)
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	1	(1)	(9)
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