Fair Value Measurements Level 4 Fair Value by Hierarchy (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Fair Value Measurement [Domain]
Assets accounted for at fair value on a recurring basis
Separate Account Assets	$ 111,634	$ 118,163
Fair Value Measurement [Domain] | Level 1 [Member]
Assets accounted for at fair value on a recurring basis
Separate Account Assets	71,606	78,099
Fair Value Measurement [Domain] | Level 2 [Member]
Assets accounted for at fair value on a recurring basis
Separate Account Assets	38,856	38,700
Fair Value Measurement [Domain] | Level 3 [Member]
Assets accounted for at fair value on a recurring basis
Separate Account Assets	201	140
Available-for-sale Securities, Debt Securities	23,819	24,657
Marketable Securities, Fixed Maturities	82	165
Equity securities, trading [1]	11	11
Equity securities, AFS	152	459
Short-term investments	1,349	572
Alternative Investments, Fair Value Disclosure	930	1,216
Reinsurance Recoverables	20,725	20,499
Separate Account Assets	115,665	120,111
Total assets accounted for at fair value on a recurring basis	137,423	144,439
Liabilities accounted for at fair value on a recurring basis
Total liabilities accounted for at fair value on a recurring basis	(851)	(941)
Separate Account Assets, at Carrying Value	4,000	1,800
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount	0	0
Guaranteed Minimum Withdrawal Benefit [Member]
Assets accounted for at fair value on a recurring basis
Obligations, Fair Value Disclosure	241	262
ABS [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	993	846
Collateralized Debt Obligations [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	940	1,408
Commercial Mortgage Backed Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	2,146	1,964
Corporate [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	14,693	15,175
Foreign Government Debt Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	345	331
US States and Political Subdivisions Debt Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	1,189	1,132
Residential Mortgage Backed Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	1,760	1,503
US Treasury Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	1,753	2,298
Liabilities accounted for at fair value on a recurring basis
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	0	711
Level 1 [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	230	123
Marketable Securities, Fixed Maturities	0	1
Equity securities, trading [1]	11	11
Equity securities, AFS	20	396
Short-term investments	637	131
Total assets accounted for at fair value on a recurring basis	72,504	78,761
Liabilities accounted for at fair value on a recurring basis
Total liabilities accounted for at fair value on a recurring basis	0	0
Level 1 [Member] | Guaranteed Minimum Withdrawal Benefit [Member]
Assets accounted for at fair value on a recurring basis
Obligations, Fair Value Disclosure	0	0
Level 1 [Member] | ABS [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	0	0
Level 1 [Member] | Collateralized Debt Obligations [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	0	0
Level 1 [Member] | Commercial Mortgage Backed Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	0	0
Level 1 [Member] | Corporate [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	0	0
Level 1 [Member] | Foreign Government Debt Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	0	0
Level 1 [Member] | US States and Political Subdivisions Debt Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	0	0
Level 1 [Member] | Residential Mortgage Backed Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	0	0
Level 1 [Member] | US Treasury Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	230	123
Level 2 [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	21,905	22,909
Marketable Securities, Fixed Maturities	82	162
Equity securities, trading [1]	0	0
Equity securities, AFS	88	25
Short-term investments	712	441
Total assets accounted for at fair value on a recurring basis	61,766	62,408
Liabilities accounted for at fair value on a recurring basis
Total liabilities accounted for at fair value on a recurring basis	(615)	(748)
Level 2 [Member] | Guaranteed Minimum Withdrawal Benefit [Member]
Assets accounted for at fair value on a recurring basis
Obligations, Fair Value Disclosure	0	0
Level 2 [Member] | ABS [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	956	841
Level 2 [Member] | Collateralized Debt Obligations [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	680	1,078
Level 2 [Member] | Commercial Mortgage Backed Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	2,125	1,902
Level 2 [Member] | Corporate [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	14,127	14,641
Level 2 [Member] | Foreign Government Debt Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	328	314
Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	1,117	1,083
Level 2 [Member] | Residential Mortgage Backed Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	1,049	875
Level 2 [Member] | US Treasury Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	1,523	2,175
Level 3 [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	1,684	1,625
Marketable Securities, Fixed Maturities	0	2
Equity securities, trading [1]	0	0
Equity securities, AFS	44	38
Short-term investments	0	0
Total assets accounted for at fair value on a recurring basis	2,182	2,046
Liabilities accounted for at fair value on a recurring basis
Total liabilities accounted for at fair value on a recurring basis	(236)	(193)
Level 3 [Member] | Guaranteed Minimum Withdrawal Benefit [Member]
Assets accounted for at fair value on a recurring basis
Obligations, Fair Value Disclosure	241	262
Level 3 [Member] | ABS [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	37	5
Level 3 [Member] | Collateralized Debt Obligations [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	260	330
Level 3 [Member] | Commercial Mortgage Backed Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	21	62
Level 3 [Member] | Corporate [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	566	534
Level 3 [Member] | Foreign Government Debt Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	17	17
Level 3 [Member] | US States and Political Subdivisions Debt Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	72	49
Level 3 [Member] | Residential Mortgage Backed Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	711	628
Level 3 [Member] | US Treasury Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	0	0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Commercial Mortgage Backed Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	9	61
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Residential Mortgage Backed Securities [Member]
Assets accounted for at fair value on a recurring basis
Available-for-sale Securities, Debt Securities	704	628
Credit Risk Contract [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	(1)	7
Credit Risk Contract [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	1
Credit Risk Contract [Member] | Level 1 [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0	0
Credit Risk Contract [Member] | Level 1 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0
Credit Risk Contract [Member] | Level 2 [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	(1)	7
Credit Risk Contract [Member] | Level 2 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	1
Credit Risk Contract [Member] | Level 3 [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0	0
Credit Risk Contract [Member] | Level 3 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0
Credit Risk Contract [Member] | Fair Value, Measurements, Recurring [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net		(7)
Credit Risk Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net		0
Credit Risk Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net		(7)
Credit Risk Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net		0
GMWB Reinsurance [Member]
Assets accounted for at fair value on a recurring basis
Reinsurance Recoverables	73	83
GMWB Reinsurance [Member] | Level 1 [Member]
Assets accounted for at fair value on a recurring basis
Reinsurance Recoverables	0	0
GMWB Reinsurance [Member] | Level 2 [Member]
Assets accounted for at fair value on a recurring basis
Reinsurance Recoverables	0	0
GMWB Reinsurance [Member] | Level 3 [Member]
Assets accounted for at fair value on a recurring basis
Reinsurance Recoverables	73	83
US GMWB Hedging Instruments [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	74	111
US GMWB Hedging Instruments [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	20	47
US GMWB Hedging Instruments [Member] | Level 1 [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0	0
US GMWB Hedging Instruments [Member] | Level 1 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0	0
US GMWB Hedging Instruments [Member] | Level 2 [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	14	27
US GMWB Hedging Instruments [Member] | Level 2 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	(1)	(4)
US GMWB Hedging Instruments [Member] | Level 3 [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	60	84
US GMWB Hedging Instruments [Member] | Level 3 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	21	51
Macro Hedge Program [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	128	74
Macro Hedge Program [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	50	73
Macro Hedge Program [Member] | Level 1 [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0	0
Macro Hedge Program [Member] | Level 1 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0	0
Macro Hedge Program [Member] | Level 2 [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	8	0
Macro Hedge Program [Member] | Level 2 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	3	0
Macro Hedge Program [Member] | Level 3 [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	120	74
Macro Hedge Program [Member] | Level 3 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	47	73
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member]
Assets accounted for at fair value on a recurring basis
Reinsurance Recoverables	68	79
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Level 1 [Member]
Assets accounted for at fair value on a recurring basis
Reinsurance Recoverables	0	0
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Level 2 [Member]
Assets accounted for at fair value on a recurring basis
Reinsurance Recoverables	68	79
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Level 3 [Member]
Assets accounted for at fair value on a recurring basis
Reinsurance Recoverables	0	0
Derivative Financial Instruments, Liabilities [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	(577)	(653)
Derivative Financial Instruments, Liabilities [Member] | Level 1 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0	0
Derivative Financial Instruments, Liabilities [Member] | Level 2 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	(615)	(748)
Derivative Financial Instruments, Liabilities [Member] | Level 3 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	38	95
Equity Contract [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	33
Equity Contract [Member] | Level 1 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0
Equity Contract [Member] | Level 2 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	33
Equity Contract [Member] | Level 3 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0
Equity Contract [Member] | Fair Value, Measurements, Recurring [Member]
Assets accounted for at fair value on a recurring basis
Derivative Asset		0
Equity Contract [Member] | Fair Value, Measurements, Recurring [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net		41
Equity Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Assets accounted for at fair value on a recurring basis
Derivative Asset		0
Equity Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net		0
Equity Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Assets accounted for at fair value on a recurring basis
Derivative Asset		0
Equity Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net		41
Equity Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Assets accounted for at fair value on a recurring basis
Derivative Asset		0
Equity Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net		0
Foreign Exchange Contract [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	4	4
Foreign Exchange Contract [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	(247)
Foreign Exchange Contract [Member] | Level 1 [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0	0
Foreign Exchange Contract [Member] | Level 1 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0
Foreign Exchange Contract [Member] | Level 2 [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	4	4
Foreign Exchange Contract [Member] | Level 2 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	(247)
Foreign Exchange Contract [Member] | Level 3 [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0	0
Foreign Exchange Contract [Member] | Level 3 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0
Foreign Exchange Contract [Member] | Fair Value, Measurements, Recurring [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net		(376)
Foreign Exchange Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net		0
Foreign Exchange Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net		(376)
Foreign Exchange Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net		0
Interest Rate Contract [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	30	54
Interest Rate Contract [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	(434)
Interest Rate Contract [Member] | Level 1 [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0	0
Interest Rate Contract [Member] | Level 1 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0
Interest Rate Contract [Member] | Level 2 [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	30	54
Interest Rate Contract [Member] | Level 2 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	(404)
Interest Rate Contract [Member] | Level 3 [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	0	0
Interest Rate Contract [Member] | Level 3 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	(30)
Interest Rate Contract [Member] | Fair Value, Measurements, Recurring [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net		(431)
Interest Rate Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net		0
Interest Rate Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net		(402)
Interest Rate Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Other liabilities [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net		(29)
Derivative Financial Instruments, Assets [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	235	250
Derivative Financial Instruments, Assets [Member] | Level 2 [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	55	92
Derivative Financial Instruments, Assets [Member] | Level 3 [Member] | Other Investments [Member]
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	$ 180	$ 158
Other Contract [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurements, Valuation Techniques	Discounted  cash flows	Discounted  cash flows
Assets accounted for at fair value on a recurring basis
Derivative Assets (Liabilities), at Fair Value, Net	$ 100	$ 131
Estimate of Fair Value Measurement [Member]
Assets accounted for at fair value on a recurring basis
Separate Account Assets	1,000	1,200
Equity linked notes [Member]
Assets accounted for at fair value on a recurring basis
Obligations, Fair Value Disclosure	33	26
Equity linked notes [Member] | Level 1 [Member]
Assets accounted for at fair value on a recurring basis
Obligations, Fair Value Disclosure	0	0
Equity linked notes [Member] | Level 2 [Member]
Assets accounted for at fair value on a recurring basis
Obligations, Fair Value Disclosure	0	0
Equity linked notes [Member] | Level 3 [Member]
Assets accounted for at fair value on a recurring basis
Obligations, Fair Value Disclosure	33	26
Liability [Member]
Assets accounted for at fair value on a recurring basis
Obligations, Fair Value Disclosure	274	288
Liability [Member] | Level 1 [Member]
Assets accounted for at fair value on a recurring basis
Obligations, Fair Value Disclosure	0	0
Liability [Member] | Level 2 [Member]
Assets accounted for at fair value on a recurring basis
Obligations, Fair Value Disclosure	0	0
Liability [Member] | Level 3 [Member]
Assets accounted for at fair value on a recurring basis
Obligations, Fair Value Disclosure	$ 274	$ 288
Hedge Funds [Member] | Separate Accounts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Redemption Restriction, Percentage	39.00%	30.00%
Private Equity Funds [Member] | Separate Accounts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Redemption Restriction, Percentage	11.00%	2.00%