Fair Value of Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
AFS securities:
Derivative investments	$ 3,399		$ 3,399		$ 3,151
Fixed maturity AFS securities:
Corporate bonds	63,914		63,914		59,261
U.S. Government bonds	517		517		494
Foreign government bonds	664		664		733
RMBS	7,197		7,197		8,039
CMBS	1,307		1,307		1,600
CDOs	120		120		102
State and municipal bonds	4,284		4,284		4,047
Hybrid and redeemable preferred securities	1,188		1,188		1,157
VIEs' fixed maturity AFS securities	705		705		700
Equity AFS securities	154		154		139
Trading securities	2,649		2,649		2,675
Derivative investments	3,399		3,399		3,151
Cash and invested cash	5,257		5,257		4,510
Separate account assets	88,839		88,839		83,477
Total assets	180,194		180,194		170,085
Future contract benefits:
Indexed annuity contracts embedded derivatives	(431)		(431)		(399)
GLB reserves embedded derivatives	(1,926)		(1,926)		(2,217)
Long-term debt - interest rate swap agreements	(1,203)		(1,203)		(1,688)
Reinsurance related embedded derivatives	(185)		(185)		(168)
Variable interest entities' liabilities - derivatives instruments	(231)		(231)		(291)
Other liabilities:
Deferred compensation plans	(358)		(358)		(354)
Credit default swaps	(11)		(11)		(16)
Total liabilities	(4,345)		(4,345)		(5,133)
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	2,396	2,741	1,697	2,620
Items Included in Net Income	(616)	(93)	(55)	96
Gains (Losses) in OCI and other	146	71	90	93
Sales, Issuances, Maturities, Settlements, Calls, Net	348	(177)	513	(256)
Transfers In or Out of Level 3, Net	(272)	(115)	(243)	(126)
Ending Fair Value	2,002	2,427	2,002	2,427
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	405	158	614	331
Sales	(36)	(160)	(24)	(258)
Maturities	(58)	(98)	(107)	(157)
Settlements	38	11	34	(83)
Calls	(1)	(88)	(4)	(89)
Sales, Issuances, Maturities, Settlements, Calls, Net	348	(177)	513	(256)
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held
Changes In Unrealized Gains (Losses) Within Level 3 Financial Instruments Carried At Fair Value And Still Held	(598)	(37)	139	156
Fair Value Assets And Liabilities Measured On Recurring Basis Transfers Into And Out Of Level 3 [Abstract]
Transfers In to Level 3	115	21	193	40
Transfers Out of Level 3	(387)	(136)	(436)	(166)
Transfers In or Out of Level 3, Net	(272)	(115)	(243)	(126)
Indexed Annuity Contracts [Member] | Discounted Cash Flow Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Liabilities Fair Value Disclosure [Abstract]
Liabilities Fair Value Disclosure	(431)		(431)
Indexed Annuity Contracts [Member] | Maximum [Member] | Discounted Cash Flow Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Liabilities Fair Value Disclosure [Abstract]
Lapse Rate	15.00%		15.00%
Indexed Annuity Contracts [Member] | Minimum [Member] | Discounted Cash Flow Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Liabilities Fair Value Disclosure [Abstract]
Lapse Rate	1.00%		1.00%
Guaranteed Living Benefits Embedded Derivative Reserves [Member] | Monte Carlo Simulation Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Liabilities Fair Value Disclosure [Abstract]
Liabilities Fair Value Disclosure	(1,926)		(1,926)
Guaranteed Living Benefits Embedded Derivative Reserves [Member] | Maximum [Member] | Monte Carlo Simulation Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Liabilities Fair Value Disclosure [Abstract]
Lapse Rate	13.10%		13.10%
Wait Period	25		25
Percent of maximum withdrawal amount	100.00%		100.00%
NPR	0.55%		0.55%
Fair Value Assumptions Expected Volatility Rate			0.35
Guaranteed Living Benefits Embedded Derivative Reserves [Member] | Minimum [Member] | Monte Carlo Simulation Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Liabilities Fair Value Disclosure [Abstract]
Lapse Rate	0.30%		0.30%
Wait Period	0		0
Percent of maximum withdrawal amount	95.00%		95.00%
NPR	0.22%		0.22%
Fair Value Assumptions Expected Volatility Rate			0.01
Corporate bonds [Member] | Discounted Cash Flow Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets Fair Value Disclosure [Abstract]
Assets Fair Value Disclosure	899		899
Corporate bonds [Member] | Maximum [Member] | Discounted Cash Flow Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets Fair Value Disclosure [Abstract]
Liquidity Duration Adjustment			13.20%
Corporate bonds [Member] | Minimum [Member] | Discounted Cash Flow Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets Fair Value Disclosure [Abstract]
Liquidity Duration Adjustment			1.10%
Foreign government bonds [Member] | Discounted Cash Flow Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets Fair Value Disclosure [Abstract]
Assets Fair Value Disclosure	52		52
Foreign government bonds [Member] | Maximum [Member] | Discounted Cash Flow Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets Fair Value Disclosure [Abstract]
Liquidity Duration Adjustment			6.10%
Foreign government bonds [Member] | Minimum [Member] | Discounted Cash Flow Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets Fair Value Disclosure [Abstract]
Liquidity Duration Adjustment			2.70%
Hybrid and redeemable preferred securities [Member] | Discounted Cash Flow Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets Fair Value Disclosure [Abstract]
Assets Fair Value Disclosure	21		21
Hybrid and redeemable preferred securities [Member] | Maximum [Member] | Discounted Cash Flow Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets Fair Value Disclosure [Abstract]
Liquidity Duration Adjustment			2.70%
Hybrid and redeemable preferred securities [Member] | Minimum [Member] | Discounted Cash Flow Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets Fair Value Disclosure [Abstract]
Liquidity Duration Adjustment			2.70%
Equity securities [Member] | Discounted Cash Flow Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets Fair Value Disclosure [Abstract]
Assets Fair Value Disclosure	11		11
Equity securities [Member] | Maximum [Member] | Discounted Cash Flow Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets Fair Value Disclosure [Abstract]
Liquidity Duration Adjustment			4.50%
Equity securities [Member] | Minimum [Member] | Discounted Cash Flow Valuation Technique [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets Fair Value Disclosure [Abstract]
Liquidity Duration Adjustment			4.30%
Corporate bonds [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	1,932	1,806	1,888	1,816
Items Included in Net Income	(4)	23	(17)	23
Gains (Losses) in OCI and other	(11)	33	(5)	44
Sales, Issuances, Maturities, Settlements, Calls, Net	45	(200)	25	(221)
Transfers In or Out of Level 3, Net	(284)	(89)	(213)	(89)
Ending Fair Value	1,678	1,573	1,678	1,573
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	80	22	91	38
Sales	(26)	(125)	(27)	(133)
Maturities	0	0	0	(1)
Settlements	(8)	(9)	(35)	(36)
Calls	(1)	(88)	(4)	(89)
Sales, Issuances, Maturities, Settlements, Calls, Net	45	(200)	25	(221)
Fair Value Assets And Liabilities Measured On Recurring Basis Transfers Into And Out Of Level 3 [Abstract]
Transfers In to Level 3	90	21	146	34
Transfers Out of Level 3	(374)	(110)	(359)	(123)
Transfers In or Out of Level 3, Net	(284)	(89)	(213)	(89)
U.S. government bonds [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	1	2	1	2
Items Included in Net Income	0	0	0	0
Gains (Losses) in OCI and other	0	0	0	0
Sales, Issuances, Maturities, Settlements, Calls, Net	0	0	0	0
Transfers In or Out of Level 3, Net	0	0	0	0
Ending Fair Value	1	2	1	2
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Sales, Issuances, Maturities, Settlements, Calls, Net	0	0	0	0
Fair Value Assets And Liabilities Measured On Recurring Basis Transfers Into And Out Of Level 3 [Abstract]
Transfers In or Out of Level 3, Net	0	0	0	0
Foreign government bonds [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	99	100	97	113
Items Included in Net Income	0	0	0	0
Gains (Losses) in OCI and other	3	(4)	4	3
Sales, Issuances, Maturities, Settlements, Calls, Net	0	0	0	(3)
Transfers In or Out of Level 3, Net	0	0	1	(17)
Ending Fair Value	102	96	102	96
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances				0
Sales				(3)
Maturities				0
Settlements				0
Calls				0
Sales, Issuances, Maturities, Settlements, Calls, Net	0	0	0	(3)
Fair Value Assets And Liabilities Measured On Recurring Basis Transfers Into And Out Of Level 3 [Abstract]
Transfers In to Level 3			1	0
Transfers Out of Level 3			0	(17)
Transfers In or Out of Level 3, Net	0	0	1	(17)
RMBS [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	98	115	158	119
Items Included in Net Income	0	(1)	(3)	(3)
Gains (Losses) in OCI and other	1	3	3	4
Sales, Issuances, Maturities, Settlements, Calls, Net	98	44	94	41
Transfers In or Out of Level 3, Net	(13)	0	(68)	0
Ending Fair Value	184	161	184	161
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	103	47	103	48
Sales	0	0	0	0
Maturities	0	0	0	0
Settlements	(5)	(3)	(9)	(7)
Calls	0	0	0	0
Sales, Issuances, Maturities, Settlements, Calls, Net	98	44	94	41
Fair Value Assets And Liabilities Measured On Recurring Basis Transfers Into And Out Of Level 3 [Abstract]
Transfers In to Level 3	0	0	0	0
Transfers Out of Level 3	(13)	0	(68)	0
Transfers In or Out of Level 3, Net	(13)	0	(68)	0
CMBS [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	32	64	34	109
Items Included in Net Income	(2)	(22)	(5)	(45)
Gains (Losses) in OCI and other	2	24	9	54
Sales, Issuances, Maturities, Settlements, Calls, Net	(1)	(12)	(8)	(64)
Transfers In or Out of Level 3, Net	8	(1)	9	(1)
Ending Fair Value	39	53	39	53
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	0	0	0	0
Sales	0	(9)	0	(53)
Maturities	0	0	0	0
Settlements	(1)	(3)	(8)	(11)
Calls	0	0	0	0
Sales, Issuances, Maturities, Settlements, Calls, Net	(1)	(12)	(8)	(64)
Fair Value Assets And Liabilities Measured On Recurring Basis Transfers Into And Out Of Level 3 [Abstract]
Transfers In to Level 3	8	0	9	0
Transfers Out of Level 3	0	(1)	0	(1)
Transfers In or Out of Level 3, Net	8	(1)	9	(1)
CDOs [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	102	136	102	172
Items Included in Net Income	0	0	0	14
Gains (Losses) in OCI and other	0	2	4	(9)
Sales, Issuances, Maturities, Settlements, Calls, Net	18	(12)	14	(51)
Transfers In or Out of Level 3, Net	0	0	0	0
Ending Fair Value	120	126	120	126
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	23	0	23	0
Sales	0	0	0	(33)
Maturities	0	0	0	0
Settlements	(5)	(12)	(9)	(18)
Calls	0	0	0	0
Sales, Issuances, Maturities, Settlements, Calls, Net	18	(12)	14	(51)
Fair Value Assets And Liabilities Measured On Recurring Basis Transfers Into And Out Of Level 3 [Abstract]
Transfers In or Out of Level 3, Net	0	0	0	0
State and municipal bonds [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	0		0
Items Included in Net Income	0		0
Gains (Losses) in OCI and other	0		0
Sales, Issuances, Maturities, Settlements, Calls, Net	32		32
Transfers In or Out of Level 3, Net	0		0
Ending Fair Value	32		32
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	32		32
Sales	0		0
Maturities	0		0
Settlements	0		0
Calls	0		0
Sales, Issuances, Maturities, Settlements, Calls, Net	32		32
Fair Value Assets And Liabilities Measured On Recurring Basis Transfers Into And Out Of Level 3 [Abstract]
Transfers In or Out of Level 3, Net	0		0
Hybrid and redeemable preferred securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	116	124	100	119
Items Included in Net Income	0	0	0	(1)
Gains (Losses) in OCI and other	(3)	4	3	5
Sales, Issuances, Maturities, Settlements, Calls, Net	0	0	0	0
Transfers In or Out of Level 3, Net	16	(22)	26	(17)
Ending Fair Value	129	106	129	106
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Sales, Issuances, Maturities, Settlements, Calls, Net	0	0	0	0
Fair Value Assets And Liabilities Measured On Recurring Basis Transfers Into And Out Of Level 3 [Abstract]
Transfers In to Level 3	16	0	35	4
Transfers Out of Level 3	0	(22)	(9)	(21)
Transfers In or Out of Level 3, Net	16	(22)	26	(17)
Trading securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	68	71	68	76
Items Included in Net Income	1	0	1	0
Gains (Losses) in OCI and other	0	4	1	2
Sales, Issuances, Maturities, Settlements, Calls, Net	2	(1)	0	(3)
Transfers In or Out of Level 3, Net	1	(3)	2	(4)
Ending Fair Value	72	71	72	71
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	2	0	2	0
Sales	0	(1)	0	(1)
Maturities	0	0	0	0
Settlements	0	0	(2)	(2)
Calls	0	0	0	0
Sales, Issuances, Maturities, Settlements, Calls, Net	2	(1)	0	(3)
Fair Value Assets And Liabilities Measured On Recurring Basis Transfers Into And Out Of Level 3 [Abstract]
Transfers In to Level 3	1	0	2	0
Transfers Out of Level 3	0	(3)	0	(4)
Transfers In or Out of Level 3, Net	1	(3)	2	(4)
Derivative Financial Instruments, Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	2,037	1,439	2,470	1,495
Items Included in Net Income	228	62	(289)	(84)
Gains (Losses) in OCI and other	155	7	67	(11)
Sales, Issuances, Maturities, Settlements, Calls, Net	97	(16)	269	92
Transfers In or Out of Level 3, Net	0	0	0	0
Ending Fair Value	2,517	1,492	2,517	1,492
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	165	107	373	275
Sales	(10)	(25)	3	(27)
Maturities	(58)	(98)	(107)	(156)
Settlements	0	0	0	0
Calls	0	0	0	0
Sales, Issuances, Maturities, Settlements, Calls, Net	97	(16)	269	92
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held
Changes In Unrealized Gains (Losses) Within Level 3 Financial Instruments Carried At Fair Value And Still Held	240	62	(332)	(94)
Fair Value Assets And Liabilities Measured On Recurring Basis Transfers Into And Out Of Level 3 [Abstract]
Transfers In or Out of Level 3, Net	0	0	0	0
Indexed Annuity Contracts Embedded Derivatives [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(480)	(528)	(399)	(497)
Items Included in Net Income	24	6	(80)	54
Gains (Losses) in OCI and other	0	0	0	0
Sales, Issuances, Maturities, Settlements, Calls, Net	25	16	48	(63)
Transfers In or Out of Level 3, Net	0	0	0	0
Ending Fair Value	(431)	(506)	(431)	(506)
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	(25)	(20)	(35)	(38)
Sales	0	0	0	0
Maturities	0	0	0	0
Settlements	50	36	83	(25)
Calls	0	0	0	0
Sales, Issuances, Maturities, Settlements, Calls, Net	25	16	48	(63)
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held
Changes In Unrealized Gains (Losses) Within Level 3 Financial Instruments Carried At Fair Value And Still Held	(3)	0	19	(4)
Fair Value Assets And Liabilities Measured On Recurring Basis Transfers Into And Out Of Level 3 [Abstract]
Transfers In or Out of Level 3, Net	0	0	0	0
Guaranteed Living Benefits Embedded Derivative Reserves [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(1,064)	(118)	(2,217)	(408)
Items Included in Net Income	(862)	(160)	291	130
Gains (Losses) in OCI and other	0	0	0	0
Sales, Issuances, Maturities, Settlements, Calls, Net	0	0	0	0
Transfers In or Out of Level 3, Net	0	0	0	0
Ending Fair Value	(1,926)	(278)	(1,926)	(278)
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Sales, Issuances, Maturities, Settlements, Calls, Net	0	0	0	0
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held
Changes In Unrealized Gains (Losses) Within Level 3 Financial Instruments Carried At Fair Value And Still Held	(814)	(108)	369	229
Fair Value Assets And Liabilities Measured On Recurring Basis Transfers Into And Out Of Level 3 [Abstract]
Transfers In or Out of Level 3, Net	0	0	0	0
Variable Interest Entities Liabilities - Derivative Instruments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(221)	(203)	(291)	(209)
Items Included in Net Income	(10)	5	60	11
Gains (Losses) in OCI and other	0	0	0	0
Sales, Issuances, Maturities, Settlements, Calls, Net	0	0	0	0
Transfers In or Out of Level 3, Net	0	0	0	0
Ending Fair Value	(231)	(198)	(231)	(198)
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Sales, Issuances, Maturities, Settlements, Calls, Net	0	0	0	0
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held
Changes In Unrealized Gains (Losses) Within Level 3 Financial Instruments Carried At Fair Value And Still Held	(10)	5	60	11
Fair Value Assets And Liabilities Measured On Recurring Basis Transfers Into And Out Of Level 3 [Abstract]
Transfers In or Out of Level 3, Net	0	0	0	0
Deferred Compensation Plans Embedded Derivatives [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(375)	(357)	(354)	(363)
Items Included in Net Income	10	(5)	(18)	(13)
Gains (Losses) in OCI and other	0	0	0	0
Sales, Issuances, Maturities, Settlements, Calls, Net	7	2	14	16
Transfers In or Out of Level 3, Net	0	0	0	0
Ending Fair Value	(358)	(360)	(358)	(360)
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	0	0	0	0
Sales	0	0	0	0
Maturities	0	0	0	0
Settlements	7	2	14	16
Calls	0	0	0	0
Sales, Issuances, Maturities, Settlements, Calls, Net	7	2	14	16
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held
Changes In Unrealized Gains (Losses) Within Level 3 Financial Instruments Carried At Fair Value And Still Held	(10)	5	18	13
Fair Value Assets And Liabilities Measured On Recurring Basis Transfers Into And Out Of Level 3 [Abstract]
Transfers In or Out of Level 3, Net	0	0	0	0
Credit default swaps [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	(10)	(6)	(16)	(16)
Items Included in Net Income	(1)	(1)	5	2
Gains (Losses) in OCI and other	0	0	0	0
Sales, Issuances, Maturities, Settlements, Calls, Net	0	0	0	7
Transfers In or Out of Level 3, Net	0	0	0	0
Ending Fair Value	(11)	(7)	(11)	(7)
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances				0
Sales				7
Maturities				0
Settlements				0
Calls				0
Sales, Issuances, Maturities, Settlements, Calls, Net	0	0	0	7
Changes in unrealized gains (losses) within Level 3 financial instruments carried at fair value and still held
Changes In Unrealized Gains (Losses) Within Level 3 Financial Instruments Carried At Fair Value And Still Held	(1)	(1)	5	1
Fair Value Assets And Liabilities Measured On Recurring Basis Transfers Into And Out Of Level 3 [Abstract]
Transfers In or Out of Level 3, Net	0	0	0	0
Equity AFS securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	61	96	56	92
Items Included in Net Income	0	0	0	8
Gains (Losses) in OCI and other	(1)	(2)	4	1
Sales, Issuances, Maturities, Settlements, Calls, Net	25	2	25	(7)
Transfers In or Out of Level 3, Net	0	0	0	2
Ending Fair Value	85	96	85	96
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	25	2	25	8
Sales	0	0	0	(15)
Maturities	0	0	0	0
Settlements	0	0	0	0
Calls	0	0	0	0
Sales, Issuances, Maturities, Settlements, Calls, Net	25	2	25	(7)
Fair Value Assets And Liabilities Measured On Recurring Basis Transfers Into And Out Of Level 3 [Abstract]
Transfers In to Level 3			0	2
Transfers Out of Level 3			0	0
Transfers In or Out of Level 3, Net	0	0	0	2
Quoted Price in Active Markets for Identical Assets (Level 1) [Member]
Fixed maturity AFS securities:
Corporate bonds	62		62		63
U.S. Government bonds	482		482		475
Foreign government bonds	0		0		0
RMBS	0		0		0
CMBS	0		0		0
CDOs	0		0		0
State and municipal bonds	0		0		0
Hybrid and redeemable preferred securities	20		20		15
VIEs' fixed maturity AFS securities	110		110		108
Equity AFS securities	45		45		37
Trading securities	2		2		2
Derivative investments	0		0		0
Cash and invested cash	0		0		0
Separate account assets	0		0		0
Total assets	721		721		700
Future contract benefits:
Indexed annuity contracts embedded derivatives	0		0		0
GLB reserves embedded derivatives	0		0		0
Long-term debt - interest rate swap agreements	0		0		0
Reinsurance related embedded derivatives	0		0		0
Variable interest entities' liabilities - derivatives instruments	0		0		0
Other liabilities:
Deferred compensation plans	0		0		0
Credit default swaps	0		0		0
Total liabilities	0		0		0
Significant Observable Inputs (Level 2) [Member]
Fixed maturity AFS securities:
Corporate bonds	62,174		62,174		57,310
U.S. Government bonds	34		34		18
Foreign government bonds	562		562		636
RMBS	7,013		7,013		7,881
CMBS	1,268		1,268		1,566
CDOs	0		0		0
State and municipal bonds	4,252		4,252		4,047
Hybrid and redeemable preferred securities	1,039		1,039		1,042
VIEs' fixed maturity AFS securities	595		595		592
Equity AFS securities	24		24		46
Trading securities	2,575		2,575		2,605
Derivative investments	882		882		681
Cash and invested cash	5,257		5,257		4,510
Separate account assets	88,839		88,839		83,477
Total assets	174,514		174,514		164,411
Future contract benefits:
Indexed annuity contracts embedded derivatives	0		0		0
GLB reserves embedded derivatives	0		0		0
Long-term debt - interest rate swap agreements	(1,203)		(1,203)		(1,688)
Reinsurance related embedded derivatives	(185)		(185)		(168)
Variable interest entities' liabilities - derivatives instruments	0		0		0
Other liabilities:
Deferred compensation plans	0		0		0
Credit default swaps	0		0		0
Total liabilities	(1,388)		(1,388)		(1,856)
Significant Unobservable Inputs (Level 3) [Member]
Fixed maturity AFS securities:
Corporate bonds	1,678		1,678		1,888
U.S. Government bonds	1		1		1
Foreign government bonds	102		102		97
RMBS	184		184		158
CMBS	39		39		34
CDOs	120		120		102
State and municipal bonds	32		32		0
Hybrid and redeemable preferred securities	129		129		100
VIEs' fixed maturity AFS securities	0		0		0
Equity AFS securities	85		85		56
Trading securities	72		72		68
Derivative investments	2,517		2,517		2,470
Cash and invested cash	0		0		0
Separate account assets	0		0		0
Total assets	4,959		4,959		4,974
Future contract benefits:
Indexed annuity contracts embedded derivatives	(431)		(431)		(399)
GLB reserves embedded derivatives	(1,926)		(1,926)		(2,217)
Long-term debt - interest rate swap agreements	0		0		0
Reinsurance related embedded derivatives	0		0		0
Variable interest entities' liabilities - derivatives instruments	(231)		(231)		(291)
Other liabilities:
Deferred compensation plans	(358)		(358)		(354)
Credit default swaps	(11)		(11)		(16)
Total liabilities	(2,957)		(2,957)		(3,277)
Carrying Value [Member]
AFS securities:
Fixed maturity securities	79,191		79,191		75,433
VIEs' fixed maturity securities	705		705		700
Equity securities	154		154		139
Trading Securities, Fair Value Disclosure	2,649		2,649		2,675
Mortgage loans on real estate	6,804		6,804		6,942
Derivative investments	3,399		3,399		3,151
Other investments	1,041		1,041		1,069
Cash and invested cash, fair value	5,257		5,257		4,510
Separate account assets	88,839		88,839		83,477
Future contract benefits:
Indexed annuity contracts embedded derivatives	(431)		(431)		(399)
GLB reserves embedded derivatives	(1,926)		(1,926)		(2,217)
Other contract holder funds:
Remaining guaranteed interest and similar contracts	(1,034)		(1,034)		(1,114)
Account value of certain investment contracts	(27,916)		(27,916)		(27,468)
Short-term debt	(300)		(300)		(300)
Long-term debt	(5,719)		(5,719)		(5,391)
Reinsurance related embedded derivatives	(185)		(185)		(168)
Variable interest entities' liabilities - derivative instruments	(231)		(231)		(291)
Other liabilities:
Deferred compensation plans	(358)		(358)		(354)
Credit default swaps	(11)		(11)		(16)
Fair Value [Member]
AFS securities:
Fixed maturity securities	79,191		79,191		75,433
VIEs' fixed maturity securities	705		705		700
Equity securities	154		154		139
Trading Securities, Fair Value Disclosure	2,649		2,649		2,675
Mortgage loans on real estate	7,463		7,463		7,608
Derivative investments	3,399		3,399		3,151
Other investments	1,041		1,041		1,069
Cash and invested cash, fair value	5,257		5,257		4,510
Separate account assets	88,839		88,839		83,477
Future contract benefits:
Indexed annuity contracts embedded derivatives	(431)		(431)		(399)
GLB reserves embedded derivatives	(1,926)		(1,926)		(2,217)
Other contract holder funds:
Remaining guaranteed interest and similar contracts	(1,034)		(1,034)		(1,114)
Account value of certain investment contracts	(31,554)		(31,554)		(30,812)
Short-term debt	(302)		(302)		(309)
Long-term debt	(6,659)		(6,659)		(5,345)
Reinsurance related embedded derivatives	(185)		(185)		(168)
Variable interest entities' liabilities - derivative instruments	(231)		(231)		(291)
Other liabilities:
Deferred compensation plans	(358)		(358)		(354)
Credit default swaps	$ (11)		$ (11)		$ (16)