Fair Value Measurements Level 4 Significant Unobservable Inputs (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Adjustments to Broker Prices Received				0.00%
Alternative Investments, Fair Value Disclosure		$ 3,067		$ 3,067		$ 2,942
Available-for-sale Securities, Debt Securities		59,109		59,109		59,384
Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		510	$ 791	510	$ 791	578	$ 735		$ 737
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	[1],[2]	(7)			6
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	[1],[3],[4]	(10)		(3)	8
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]			(3)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]	(2)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases		69		331	298
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements		6		16	2
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales		201		251	219
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	[6]	1		7	5
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	[6]	76		133	36
Available-for-sale Securities, Debt Securities		3,238		3,238		3,475
Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		61	98	61	98	92	86	$ 139
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)			1	(2)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings			1	7
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases		2	4	21
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements		24	46	24
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales		1		8
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3		2		13
Limited Partnerships and Other Alternative Investments [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		98	87	98	87	$ 189	230		$ 108
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	[1],[2]	(12)		(4)	(5)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	[1],[3],[4]	(12)		(4)	(5)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases		11		44	50
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements		0		0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales					24
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	[6]	131		$ 131	42
CMBS [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
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)
Positive or negative relationship of change in input to change in fair value measurement				Decrease		Decrease
CMBS [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Counterparty Credit Risk				757.00%		2475.00%
CMBS [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Counterparty Credit Risk				36.00%		46.00%
CMBS [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Counterparty Credit Risk				228.00%		284.00%
Corporate [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurements, Valuation Techniques				Discounted cash flows		Discounted cash flows
Fair Value Measurements, Significant Assumptions				Spread		Spread
Positive or negative relationship of change in input to change in fair value measurement				Decrease		Decrease
Corporate [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Counterparty Credit Risk				735.00%		765.00%
Corporate [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Counterparty Credit Risk				70.00%		123.00%
Corporate [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Counterparty Credit Risk				326.00%		279.00%
Municipal [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurements, Valuation Techniques				Discounted cash flows		Discounted cash flows
Fair Value Measurements, Significant Assumptions				Spread		Spread
Positive or negative relationship of change in input to change in fair value measurement				Decrease		Decrease
Municipal [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Treasury Yield				197.00%		212.00%
Municipal [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Treasury Yield				197.00%		212.00%
Municipal [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Treasury Yield				197.00%		212.00%
RMBS [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurements, Valuation Techniques				Discounted cash flows		Discounted cash flows
RMBS [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Counterparty Credit Risk				1176.00%		1904.00%
Fair Value Inputs, Prepayment Rate				100.00%		7.00%
Fair Value Inputs, Probability of Default				14.00%		14.00%
Fair Value Inputs, Loss Severity				100.00%		100.00%
RMBS [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Counterparty Credit Risk				53.00%		23.00%
Fair Value Inputs, Prepayment Rate				0.00%		0.00%
Fair Value Inputs, Probability of Default				0.00%		1.00%
Fair Value Inputs, Loss Severity				0.00%		0.00%
RMBS [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Counterparty Credit Risk				169.00%		142.00%
Fair Value Inputs, Prepayment Rate				4.00%		2.00%
Fair Value Inputs, Probability of Default				6.00%		7.00%
Fair Value Inputs, Loss Severity				78.00%		78.00%
Spread [Member] | RMBS [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurements, Significant Assumptions				Spread		Spread
Positive or negative relationship of change in input to change in fair value measurement				Decrease		Decrease
Withdrawal Utilization [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Positive or negative relationship of change in input to change in fair value measurement	[7],[8]			Increase
Withdrawal Utilization [Member] | Maximum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Unobservable Input Range	[8]			100.00%
Withdrawal Utilization [Member] | Minimum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Unobservable Input Range	[8]			20.00%
Withdrawal Rates [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Positive or negative relationship of change in input to change in fair value measurement	[7],[9]			Increase
Withdrawal Rates [Member] | Maximum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Unobservable Input Range	[9]			8.00%
Withdrawal Rates [Member] | Minimum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Unobservable Input Range	[9]			0.00%
Lapse Rates [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Positive or negative relationship of change in input to change in fair value measurement	[7],[10]			Decrease
Lapse Rates [Member] | Maximum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Unobservable Input Range	[10]			75.00%
Lapse Rates [Member] | Minimum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Unobservable Input Range	[10]			0.00%
Reset Elections [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Positive or negative relationship of change in input to change in fair value measurement	[7],[11]			Increase
Reset Elections [Member] | Maximum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Unobservable Input Range	[11]			75.00%
Reset Elections [Member] | Minimum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Unobservable Input Range	[11]			20.00%
Equity Volatility [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Positive or negative relationship of change in input to change in fair value measurement	[7],[12]			Increase
Equity Volatility [Member] | Maximum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Unobservable Input Range	[12]			40.00%
Equity Volatility [Member] | Minimum [Member] | Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Unobservable Input Range	[12]			10.00%
Prepayment Rate [Member] | RMBS [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurements, Significant Assumptions				Constant prepayment rate		Constant prepayment rate
Positive or negative relationship of change in input to change in fair value measurement				Decrease [4]		Decrease [4]
Probability of Default [Member] | RMBS [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurements, Significant Assumptions				Constant default rate		Constant default rate
Positive or negative relationship of change in input to change in fair value measurement				Decrease		Decrease
Loss Severity [Member] | RMBS [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurements, Significant Assumptions				Loss severity		Loss severity
Positive or negative relationship of change in input to change in fair value measurement				Decrease		Decrease
Asset-backed Securities [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities		2,716		$ 2,716		$ 2,472
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities		27		27		122
Foreign Government Debt Securities [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities		1,255		1,255		1,636
Foreign Government Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities		50		50		59
RMBS [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities		3,859		3,859		3,918
RMBS [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities		1,492		1,492		1,281
Municipal [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities		12,211		12,211		12,871
Municipal [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities		50		50		66
Corporate [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities		26,772		26,772		27,359
Corporate [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities		905		905		1,040
CMBS [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities		4,542		4,542		4,415
CMBS [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities		169		169		284
Collateralized Debt Obligations [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	[13]	3,031		3,031		2,841
Collateralized Debt Obligations [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities		545		545		623
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Alternative Investments, Fair Value Disclosure		98		$ 98		189
Fair Value, Measurements, Recurring [Member] | Limited Partnerships and Other Alternative Investments [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurements, Valuation Processes, Description				The predominant valuation method uses a NAV calculated on a monthly basis and represents funds where the Company does not have the ability to redeem the investment in the near-term at that NAV, including an assessment of the investee's liquidity.
Fair Value, Measurements, Recurring [Member] | RMBS [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities		1,492		$ 1,492		1,281
Fair Value, Measurements, Recurring [Member] | Municipal [Member] | Non-Broker Priced [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities		32		32		32
Fair Value, Measurements, Recurring [Member] | Corporate [Member] | Non-Broker Priced [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities		406		406		568
Fair Value, Measurements, Recurring [Member] | CMBS [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities		169		$ 169		$ 284
Other Contract [Member] | US GMWB Hedging Instruments [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurements, Valuation Techniques				Discounted cash flows		Discounted cash flows
Fair Value Measurements, Significant Assumptions				Equity volatility		Equity volatility
Positive or negative relationship of change in input to change in fair value measurement				Increase		Increase
Derivative Assets (Liabilities), at Fair Value, Net		171		$ 171		$ 124
Other Contract [Member] | Maximum [Member] | US GMWB Hedging Instruments [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Assumptions, Expected Volatility Rate				40.00%		40.00%
Other Contract [Member] | Minimum [Member] | US GMWB Hedging Instruments [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Assumptions, Expected Volatility Rate				10.00%		10.00%
Equity Option [Member] | US Macro Hedge Program [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurements, Valuation Techniques				Option model		Option model
Fair Value Measurements, Significant Assumptions				Equity volatility		Equity volatility
Positive or negative relationship of change in input to change in fair value measurement				Increase		Increase
Derivative Assets (Liabilities), at Fair Value, Net		183		$ 183		$ 141
Equity Option [Member] | US GMWB Hedging Instruments [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurements, Valuation Techniques						Option model
Fair Value Measurements, Significant Assumptions						Equity volatility
Positive or negative relationship of change in input to change in fair value measurement						Increase
Derivative Assets (Liabilities), at Fair Value, Net						$ 46
Equity Option [Member] | Maximum [Member] | US Macro Hedge Program [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Assumptions, Expected Volatility Rate				28.00%		28.00%
Equity Option [Member] | Maximum [Member] | US GMWB Hedging Instruments [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Assumptions, Expected Volatility Rate						34.00%
Equity Option [Member] | Minimum [Member] | US Macro Hedge Program [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Assumptions, Expected Volatility Rate				15.00%		27.00%
Equity Option [Member] | Minimum [Member] | US GMWB Hedging Instruments [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Assumptions, Expected Volatility Rate						22.00%
Interest Rate Swap [Member] | Interest Rate Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
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
Positive or negative relationship of change in input to change in fair value measurement				Decrease		Decrease
Derivative Assets (Liabilities), at Fair Value, Net		(30)		$ (30)		$ (29)
Interest Rate Swap [Member] | Maximum [Member] | Interest Rate Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurements, Unobservable Swap Curve				3.00%		3.00%
Interest Rate Swap [Member] | Minimum [Member] | Interest Rate Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurements, Unobservable Swap Curve				3.00%		3.00%
Interest Rate Swaption [Member] | Long [Member] | Interest Rate Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Measurements, Valuation Techniques				Option model		Option model
Fair Value Measurements, Significant Assumptions				Interest rate volatility		Interest rate volatility
Positive or negative relationship of change in input to change in fair value measurement				Increase		Increase
Derivative Assets (Liabilities), at Fair Value, Net		10		$ 10		$ 22
Interest Rate Swaption [Member] | Long [Member] | Maximum [Member] | Interest Rate Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Assumptions, Expected Volatility Rate				1.00%		1.00%
Interest Rate Swaption [Member] | Long [Member] | Minimum [Member] | Interest Rate Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Assumptions, Expected Volatility Rate				1.00%		1.00%
Available-for-sale Securities [Member] | Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		3,238	3,576	$ 3,238	3,576	$ 3,475	3,391	3,774
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	[1],[2]	(12)	(3)	(13)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	[1],[3],[4]	(9)	12	16
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]	(19)	(6)	57
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]				30
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases		126	201	716
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements		116	236	320
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales		109	151	272
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	[6]	64	111	268
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	[6]	90	129	556
Available-for-sale Securities [Member] | Asset-backed Securities [Member] | Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		27	141	27	141	122	53	73
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	[1],[2]			1
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	[1],[3],[4]			(1)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]			2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]				3
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases		8	35	79
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements		2		6
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales		3		16
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	[6]		75	1
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	[6]	29	42	152
Available-for-sale Securities [Member] | Foreign Government Debt Securities [Member] | Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		50	49	50	49	59	40	55
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]	(1)		4
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]				7
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases		3		15
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements		1	1	3
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales		2	5	28
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	[6]	11		11
Available-for-sale Securities [Member] | RMBS [Member] | Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		1,492	1,258	1,492	1,258	1,281	1,540	1,295
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	[1],[3],[4]		3	2
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]	(6)	3	6
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]				13
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases		71	120	516
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements		56	47	149
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales		57	116	142
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	[6]			47
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	[6]			53
Available-for-sale Securities [Member] | Municipal [Member] | Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		50	64	50	64	66	49	63
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	[1],[3],[4]			(1)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]	1	1	4
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]				5
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements				13
Available-for-sale Securities [Member] | Corporate [Member] | Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		905	1,143	905	1,143	1,040	931	1,205
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	[1],[2]	(11)	(2)	(11)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	[1],[3],[4]	(9)	(2)	13
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]	1	(7)	41
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]				21
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases		38	21	61
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements		22	16	51
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales		47	18	80
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	[6]	51	25	202
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	[6]	38	65	213
Available-for-sale Securities [Member] | CMBS [Member] | Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		169	331	169	331	284	214	471
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	[1],[2]	(1)	(1)	(2)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	[1],[3],[4]	1	(1)	(2)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]	(5)	2	8
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]				(22)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases		6	25	45
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements		26	155	64
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales				6
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	[6]	2	11	7
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	[6]	23	22	91
Available-for-sale Securities [Member] | Collateralized Debt Obligations [Member] | Fixed Maturities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		545	590	545	590	$ 623	$ 564	$ 612
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	[1],[2]			(1)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	[1],[3],[4]	(1)	12	5
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]	(9)	(5)	(8)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]				$ 3
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements		$ 9	17	34
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales			$ 12
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	[6]			$ 47

[1] [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.

[2] [7]Amounts presented are for Level 3 only and therefore may not agree to other disclosures included herein.

[3] [1]The Company classifies 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.

[4] [6]Includes both market and non-market impacts in deriving realized and unrealized gains (losses).

[5] [3]All amounts are before income taxes and amortization of DAC.

[6] [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.

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

[8] [2]Range represents assumed cumulative percentages of policyholders taking withdrawals.

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

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

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

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

[13] 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).