Fair Value Measurements Level 4 Significant Unobservable Inputs (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended			12 Months Ended
		Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2016		Jun. 30, 2015	Dec. 31, 2015		Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative, Gain (Loss) on Derivative, Net		$ 22	[1]	$ (13)	[1]	$ 19		$ (40)
Available-for-sale Securities, Debt Securities		25,700				25,700			$ 24,657
Credit standing adjustment assumption net of reinsurance [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative, Gain (Loss) on Derivative, Net		(3)		(2)		$ (1)		(2)
Derivative Financial Instruments, Assets [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair value measurements valuation techniques						Derivative instruments are fair valued using pricing valuation models for OTC derivatives that utilize independent market data inputs, quoted market prices for exchange-traded and OTC-cleared derivatives, or independent broker quotations. Excluding embedded and reinsurance related derivatives, as of June 30, 2016 and December 31, 2015, 93% and 94%, respectively, of derivatives, based upon notional values, were priced by valuation models, including discounted cash flow models and option-pricing models that utilize present value techniques, or quoted market prices. The remaining derivatives were priced by broker quotations.
Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		171		286		$ 171		286	139		$ 154	$ 137	$ 112
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	[2],[3]							1
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	[2],[4],[5]							1
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)				1		7	[6]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		22		222		61		260
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		3		5		9		10
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		6		19		16		25
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	[7]	3		5		6		6
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	[7]	2		53		17		57
Available-for-sale Securities, Debt Securities		1,786				1,786			1,625
Level 3 [Member] | US Macro Hedge Program [Member] | Equity options [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net		175	[8]			$ 175	[8]		$ 179
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair value measurements valuation techniques						Option model	[8]		Option model
Fair value measurements significant assumptions						Equity volatility	[8]		Equity volatility
Fair Value Measurements, Sensitivity Analysis, Description	[9]					Increase	[8]		Increase
Level 3 [Member] | Interest Rate Contract [Member] | Interest Rate Swap [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net		(34)				$ (34)			$ (30)
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair value measurements valuation techniques						Discounted  cash flows			Discounted  cash flows
Fair value measurements significant assumptions						Swap curve  beyond 30 years			Swap curve  beyond 30 years
Fair Value Measurements, Sensitivity Analysis, Description	[9]					Decrease			Decrease
Level 3 [Member] | US GMWB Hedging Instruments [Member] | Other Contract [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net		166				$ 166			$ 131
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair value measurements valuation techniques						Discounted  cash flows			Discounted  cash flows
Fair value measurements significant assumptions						Equity volatility			Equity volatility
Fair Value Measurements, Sensitivity Analysis, Description	[9]					Increase			Increase
Level 3 [Member] | US GMWB Hedging Instruments [Member] | Variance Swap [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net		(34)				$ (34)			$ (31)
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair value measurements valuation techniques						Option model			Option model
Fair value measurements significant assumptions						Equity volatility			Equity volatility
Fair Value Measurements, Sensitivity Analysis, Description						Increase			Increase
Level 3 [Member] | US GMWB Hedging Instruments [Member] | Equity options [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net		33				$ 33			$ 35
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair value measurements valuation techniques						Option model			Option model
Fair value measurements significant assumptions						Equity volatility			Equity volatility
Fair Value Measurements, Sensitivity Analysis, Description						Increase			Increase	[9]
Level 3 [Member] | Maximum [Member] | US Macro Hedge Program [Member] | Equity options [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Assumptions, Expected Volatility Rate						28.00%	[8]		28.00%
Level 3 [Member] | Maximum [Member] | Interest Rate Contract [Member] | Interest Rate Swap [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Measurements, Unobservable Swap Curve						2.00%			3.00%
Level 3 [Member] | Maximum [Member] | US GMWB Hedging Instruments [Member] | Other Contract [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Assumptions, Expected Volatility Rate						30.00%			40.00%
Level 3 [Member] | Maximum [Member] | US GMWB Hedging Instruments [Member] | Variance Swap [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Assumptions, Expected Volatility Rate						24.00%			21.00%
Level 3 [Member] | Maximum [Member] | US GMWB Hedging Instruments [Member] | Equity options [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Assumptions, Expected Volatility Rate						30.00%			29.00%
Level 3 [Member] | Minimum [Member] | US Macro Hedge Program [Member] | Equity options [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Assumptions, Expected Volatility Rate						12.00%	[8]		14.00%
Level 3 [Member] | Minimum [Member] | Interest Rate Contract [Member] | Interest Rate Swap [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Measurements, Unobservable Swap Curve						2.00%			3.00%
Level 3 [Member] | Minimum [Member] | US GMWB Hedging Instruments [Member] | Other Contract [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Assumptions, Expected Volatility Rate						12.00%			10.00%
Level 3 [Member] | Minimum [Member] | US GMWB Hedging Instruments [Member] | Variance Swap [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Assumptions, Expected Volatility Rate						22.00%			19.00%
Level 3 [Member] | Minimum [Member] | US GMWB Hedging Instruments [Member] | Equity options [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Assumptions, Expected Volatility Rate						27.00%			27.00%
Level 3 [Member] | Fixed Maturities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		0		72		$ 0		72	$ 2		1	72	84
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	[2],[3]							(2)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	[2],[4],[5]							(4)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases				1		1		5
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements				(1)				2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		1		1		1		5
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3				1	[7]	$ 2	[7]	10
Level 3 [Member] | CMBS [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair value measurements valuation techniques						Discounted cash flows			Discounted cash flows
Fair value measurements significant assumptions						Spread (encompasses prepayment, default risk and loss severity)			Spread (encompasses prepayment, default risk and loss severity)
Fair Value Measurements, Sensitivity Analysis, Description	[10]					Decrease			Decrease
Level 3 [Member] | CMBS [Member] | Maximum [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Counterparty Credit Risk						1275.00%			1505.00%
Level 3 [Member] | CMBS [Member] | Minimum [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Counterparty Credit Risk						10.00%			31.00%
Level 3 [Member] | CMBS [Member] | Weighted Average [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Counterparty Credit Risk	[11]					234.00%			230.00%
Level 3 [Member] | Corporate [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair value measurements valuation techniques	[12]					Discounted cash flows			Discounted cash flows
Fair value measurements significant assumptions	[12]					Spread			Spread
Fair Value Measurements, Sensitivity Analysis, Description	[10],[12]					Decrease			Decrease
Level 3 [Member] | Corporate [Member] | Maximum [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Counterparty Credit Risk	[12]					1531.00%			800.00%
Level 3 [Member] | Corporate [Member] | Minimum [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Counterparty Credit Risk	[12]					158.00%			63.00%
Level 3 [Member] | Corporate [Member] | Weighted Average [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Counterparty Credit Risk	[11],[12]					360.00%			290.00%
Level 3 [Member] | Municipal [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair value measurements valuation techniques	[12]					Discounted cash flows			Discounted cash flows
Fair value measurements significant assumptions	[12]					Spread			Spread
Fair Value Measurements, Sensitivity Analysis, Description	[10],[12]					Decrease			Decrease
Level 3 [Member] | Municipal [Member] | Maximum [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Treasury Yield	[12]					283.00%			193.00%
Level 3 [Member] | Municipal [Member] | Minimum [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Treasury Yield	[12]					223.00%			193.00%
Level 3 [Member] | Municipal [Member] | Weighted Average [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Treasury Yield	[11],[12]					240.00%			193.00%
Level 3 [Member] | RMBS [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair value measurements valuation techniques						Discounted cash flows			Discounted cash flows
Level 3 [Member] | RMBS [Member] | Maximum [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Counterparty Credit Risk						1896.00%			1696.00%
Fair Value Inputs, Prepayment Rate						20.00%			20.00%
Fair Value Inputs, Probability of Default						10.00%			10.00%
Fair Value Inputs, Loss Severity						100.00%			100.00%
Level 3 [Member] | RMBS [Member] | Minimum [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Counterparty Credit Risk						54.00%			30.00%
Fair Value Inputs, Prepayment Rate						0.00%			0.00%
Fair Value Inputs, Probability of Default						1.00%			1.00%
Fair Value Inputs, Loss Severity						0.00%			0.00%
Level 3 [Member] | RMBS [Member] | Weighted Average [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Counterparty Credit Risk	[11]					205.00%			172.00%
Fair Value Inputs, Prepayment Rate	[11]					3.00%			3.00%
Fair Value Inputs, Probability of Default	[11]					6.00%			6.00%
Fair Value Inputs, Loss Severity	[11]					79.00%			79.00%
Fair Value, Inputs, Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		299				$ 299			$ 123
Fair Value, Inputs, Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		23,615				$ 23,615			$ 22,909
Withdrawal Utilization [Member] | Level 3 [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Measurements, Sensitivity Analysis, Description	[13],[14]					Increase			Increase
Withdrawal Utilization [Member] | Level 3 [Member] | Maximum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Range of Values-Unobservable Inputs	[14]					100.00%			100.00%
Withdrawal Utilization [Member] | Level 3 [Member] | Minimum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Range of Values-Unobservable Inputs	[14]					20.00%			20.00%
Withdrawal Rates [Member] | Level 3 [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Measurements, Sensitivity Analysis, Description	[13],[15]					Increase			Increase
Withdrawal Rates [Member] | Level 3 [Member] | Maximum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Range of Values-Unobservable Inputs	[15]					8.00%			8.00%
Withdrawal Rates [Member] | Level 3 [Member] | Minimum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Range of Values-Unobservable Inputs	[15]					0.00%			0.00%
Spread [Member] | Level 3 [Member] | RMBS [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair value measurements significant assumptions						Spread			Spread
Fair Value Measurements, Sensitivity Analysis, Description	[10]					Decrease			Decrease
Prepayment Rate [Member] | Level 3 [Member] | RMBS [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair value measurements significant assumptions						Constant prepayment rate			Constant prepayment rate
Fair Value Measurements, Sensitivity Analysis, Description	[10],[16]					Decrease [4]			Decrease [4]
Probability of Default [Member] | Level 3 [Member] | RMBS [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair value measurements significant assumptions						Constant default rate			Constant default rate
Fair Value Measurements, Sensitivity Analysis, Description	[10]					Decrease			Decrease
Loss Severity [Member] | Level 3 [Member] | RMBS [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair value measurements significant assumptions						Loss severity			Loss severity
Fair Value Measurements, Sensitivity Analysis, Description	[10]					Decrease			Decrease
Lapse Rates [Member] | Level 3 [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Measurements, Sensitivity Analysis, Description	[13],[17]					Decrease			Decrease
Lapse Rates [Member] | Level 3 [Member] | Maximum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Range of Values-Unobservable Inputs	[17]					75.00%			75.00%
Lapse Rates [Member] | Level 3 [Member] | Minimum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Range of Values-Unobservable Inputs	[17]					0.00%			0.00%
Reset Elections [Member] | Level 3 [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Measurements, Sensitivity Analysis, Description	[13]					Increase	[18]		Increase
Reset Elections [Member] | Level 3 [Member] | Maximum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Range of Values-Unobservable Inputs						75.00%	[18]		75.00%
Reset Elections [Member] | Level 3 [Member] | Minimum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Range of Values-Unobservable Inputs						20.00%	[18]		20.00%
Equity Volatility [Member] | Level 3 [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Measurements, Sensitivity Analysis, Description	[13],[19]					Increase			Increase
Equity Volatility [Member] | Level 3 [Member] | Maximum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Range of Values-Unobservable Inputs	[19]					30.00%			40.00%
Equity Volatility [Member] | Level 3 [Member] | Minimum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Range of Values-Unobservable Inputs	[19]					12.00%			10.00%
Foreign Government Debt Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		296				$ 296			$ 331
Foreign Government Debt Securities [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		18				18			17
Foreign Government Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		0				0			0
Foreign Government Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		278				278			314
Asset-backed Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		1,019				1,019			846
Asset-backed Securities [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		7				7			5
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		0				0			0
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		1,012				1,012			841
RMBS [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		1,732				1,732			1,503
RMBS [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		690				690			628
RMBS [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		0				0			0
RMBS [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		1,042				1,042			875
RMBS [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		690				690			628
Municipal [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		1,282				1,282			1,132
Municipal [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		73				73			49
Municipal [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		0				0			0
Municipal [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		1,209				1,209			1,083
Municipal [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Non-Broker Priced [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	[12]	55				55			31
Corporate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		15,594				15,594			15,175
Corporate [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		717				717			534
Corporate [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		0				0			0
Corporate [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		14,877				14,877			14,641
Corporate [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Non-Broker Priced [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	[12]	385				385			213
CMBS [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		2,146				2,146			1,964
CMBS [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		15				15			62
CMBS [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		0				0			0
CMBS [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		2,131				2,131			1,902
CMBS [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		14				14			61
Collateralized Debt Obligations [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	[20]	1,269				1,269			1,408
Collateralized Debt Obligations [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		266				266			330
Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		0				0			0
Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities		1,003				1,003			1,078
Available-for-sale Securities [Member] | Level 3 [Member] | Fixed Maturities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		1,786		1,722		1,786		1,722	1,625		1,690	1,990	2,025
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	[2],[3]	(1)						(3)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	[2],[4],[5]	(2)				(8)		(4)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[6]	23		(17)		3		(22)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		74		48		216		86
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		157		81		190		121
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		36		57		39		95
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		276	[7]	16	[7]	322	[7]	79
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		82	[7]	177	[7]	143	[7]	226
Available-for-sale Securities [Member] | Foreign Government Debt Securities [Member] | Level 3 [Member] | Fixed Maturities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		18		15		18		15	17		20	17	30
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	[2],[3]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[6]	1		(2)		2		(2)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases				2		3		3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		1		1		2		2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		2		1		2		14
Available-for-sale Securities [Member] | Asset-backed Securities [Member] | Level 3 [Member] | Fixed Maturities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		7		14		7		14	5		2	96	82
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[6]			(2)				(2)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases				9				22
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales				6				6
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		5	[7]			5	[7]	1
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3				83	[7]	3	[7]	83
Available-for-sale Securities [Member] | RMBS [Member] | Level 3 [Member] | Fixed Maturities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		690		662		690		662	628		701	674	734
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	[2],[4],[5]							(1)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[6]	3		1		(2)		1
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		40		35		148		46
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		44		29		76		58
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales				35				57
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3				16	[7]	2	[7]	16
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		10	[7]			10	[7]	19
Available-for-sale Securities [Member] | Municipal [Member] | Level 3 [Member] | Fixed Maturities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		73		49		73		49	49		50	52	54
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[6]	3		(3)		4		(5)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		12				12
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	[7]	8				8
Available-for-sale Securities [Member] | Corporate [Member] | Level 3 [Member] | Fixed Maturities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		717		547		717		547	534		538	670	646
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	[2],[3]	(1)				(1)		(1)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	[2],[4],[5]	(1)				(7)		(2)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[6]	16		(10)		4		(26)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		19		2		34		3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		48		26		45		24
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		32		12		35		15
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		263	[7]			307	[7]	58
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		38	[7]	77	[7]	75	[7]	93
Available-for-sale Securities [Member] | CMBS [Member] | Level 3 [Member] | Fixed Maturities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		15		87		15		87	62		51	119	119
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	[2],[3]							(1)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[6]	1		1		(1)		(1)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		3				19		12
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		4		13		8		19
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		2		3		2		3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3								4
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		34	[7]	17	[7]	55	[7]	25
Available-for-sale Securities [Member] | Collateralized Debt Obligations [Member] | Level 3 [Member] | Fixed Maturities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		266		348		266		348	$ 330		$ 328	$ 362	$ 360
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	[2],[3]							(1)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	[2],[4],[5]	(1)				(1)		(1)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[6]	(1)		(2)		(4)		13
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		$ 60		$ 12		$ 59		18
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3								$ 6

[1] Excludes investments that contain an embedded credit derivative for which the Company has elected the fair value option. For further discussion, see the Fair Value Option section in Note 2 - Fair Value Measurements.

[2] 2]All amounts in these rows are reported in net realized capital gains (losses). The realized/unrealized gains (losses) included in net income for separate account assets are offset by an equal amount for separate account liabilities, which results in a net zero impact on net income for the Company. All amounts are before income taxes and amortization of DAC.

[3] [7]Amounts presented are for Level 3 only and therefore may not agree to other disclosures included herein.

[4] [1]The Company classifies realized and unrealized gains and losses on GMWB reinsurance derivatives and GMWB embedded derivatives as unrealized gains (losses) for purposes of disclosure in this table because it is impracticable to track on a contract-by-contract basis the realized gains (losses) for these derivatives and embedded derivatives.

[5] [6]Includes both market and non-market impacts in deriving realized and unrealized gains (losses).

[6] [3]All amounts are before income taxes and amortization of DAC.

[7] [4]Transfers in and/or (out) of Level 3 are primarily attributable to the availability of market observable information and the re-evaluation of the observability of pricing inputs.

[8] [2]Excludes derivatives for which the Company bases fair value on broker quotations as noted in the following discussion.

[9] Conversely, the impact of a decrease in input would have the opposite impact to the fair value as that presented in the table. Changes are based on long positions, unless otherwise noted. Changes in fair value will be inversely impacted for short positions.

[10] Conversely, the impact of a decrease in input would have the opposite impact to the fair value as that presented in the table.

[11] The weighted average is determined based on the fair value of the securities.

[12] xcludes securities for which the Company bases fair value on broker quotations as noted in the following discussion.

[13] Conversely, the impact of a decrease in input would have the opposite impact to the fair value as that presented in the table.

[14] Range represents assumed cumulative percentages of policyholders taking withdrawals.

[15] Range represents assumed cumulative annual amount withdrawn by policyholders.

[16] Decrease for above market rate coupons and increase for below market rate coupons.

[17] Range represents assumed annual percentages of full surrender of the underlying variable annuity contracts across all policy durations for in force business.

[18] Range represents assumed cumulative percentages of policyholders that would elect to reset their guaranteed benefit base.

[19] Range represents implied market volatilities for equity indices based on multiple pricing sources.

[20] Gross unrealized gains (losses) exclude the fair value of bifurcated embedded derivatives within certain securities. Subsequent changes in value are recorded in net realized capital gains (losses).