Fair Value Measurements Level 4 Significant Unobservable Inputs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2015
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	0.00%		0.00%
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 1,932	$ 2,507	$ 1,932	$ 2,507	$ 2,220	$ 2,089	$ 2,378	$ 2,140
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(12)	(91)	(94)	(46)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	(12)	(90)	(87)	(74)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	13	30	46	43
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	78	385	541	673
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	47	49	247	243
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	18	44	139	102
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	3	66	73	394
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	174	169	475	324
Available-for-sale Securities, Debt Securities	23,643		23,643		23,819
Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	226	325	226	325	201	192	171	139
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	1
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0	1	3	1
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	3	(1)	5	(5)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	37	165	148	226
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	1	3	7	12
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	2	11	45	27
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0	10	10	16
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	(3)	(7)	(89)	23
Available-for-sale Securities, Debt Securities	1,433		1,433		1,684
Level 3 [Member] | Reinsurance Recoverable [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		98		98			106	83
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(9)	(12)	(33)	4
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		(12)		4
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		4		11
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0
Level 3 [Member] | Other Contract [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	62		$ 62		$ 100
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			Increase		Increase
Level 3 [Member] | Interest Rate Swap [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	(29)		$ (29)		$ (29)
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			Decrease		Decrease
Level 3 [Member] | Variance Swap [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	(40)		$ (40)		$ (36)
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] | Equity Option [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	190		$ 190		$ 188
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] | Maximum [Member] | Other Contract [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Assumptions, Expected Volatility Rate			30.00%		30.00%
Level 3 [Member] | Maximum [Member] | Interest Rate Swap [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Measurements, Unobservable Swap Curve			3.00%		3.00%
Level 3 [Member] | Maximum [Member] | Variance Swap [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Assumptions, Expected Volatility Rate			19.00%		23.00%
Level 3 [Member] | Maximum [Member] | Equity Option [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Assumptions, Expected Volatility Rate			30.00%		28.00%
Level 3 [Member] | Minimum [Member] | Other Contract [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Assumptions, Expected Volatility Rate			7.00%		12.00%
Level 3 [Member] | Minimum [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] | Variance Swap [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Assumptions, Expected Volatility Rate			12.00%		20.00%
Level 3 [Member] | Minimum [Member] | Equity Option [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Assumptions, Expected Volatility Rate			15.00%		17.00%
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		0				2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings				0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)				0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases				1
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements				0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales				1
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3				0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3				(2)
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, Sensitivity Analysis, Description			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			1816.00%		1273.00%
Level 3 [Member] | CMBS [Member] | Minimum [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Counterparty Credit Risk			9.00%		10.00%
Level 3 [Member] | CMBS [Member] | Weighted Average [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Counterparty Credit Risk			489.00%		249.00%
Level 3 [Member] | Corporate [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, Sensitivity Analysis, Description			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			940.00%		1021.00%
Level 3 [Member] | Corporate [Member] | Minimum [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Counterparty Credit Risk			102.00%		122.00%
Level 3 [Member] | Corporate [Member] | Weighted Average [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Counterparty Credit Risk			300.00%		373.00%
Level 3 [Member] | Municipal [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, Sensitivity Analysis, Description			Decrease		Decrease
Level 3 [Member] | Municipal [Member] | Maximum [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Treasury Yield			239.00%		286.00%
Level 3 [Member] | Municipal [Member] | Minimum [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Treasury Yield			184.00%		135.00%
Level 3 [Member] | Municipal [Member] | Weighted Average [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Inputs Treasury Yield			198.00%		195.00%
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			501.00%		1830.00%
Fair Value Inputs, Prepayment Rate			12.00%		20.00%
Fair Value Inputs, Probability of Default			7.00%		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			26.00%		16.00%
Fair Value Inputs, Prepayment Rate			0.00%		0.00%
Fair Value Inputs, Probability of Default			2.00%		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			77.00%		189.00%
Fair Value Inputs, Prepayment Rate			5.00%		4.00%
Fair Value Inputs, Probability of Default			4.00%		5.00%
Fair Value Inputs, Loss Severity			68.00%		75.00%
Fair Value, Inputs, Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	122		$ 122		$ 230
Fair Value, Inputs, Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	22,088		$ 22,088		$ 21,905
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			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			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			15.00%		15.00%
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			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			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			0.00%		0.00%
Spread [Member] | Level 3 [Member] | CMBS [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair value measurements significant assumptions			Spread (encompasses prepayment, default risk and loss severity)		Spread (encompasses prepayment, default risk and loss severity)
Spread [Member] | Level 3 [Member] | Corporate [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair value measurements significant assumptions			Spread		Spread
Spread [Member] | Level 3 [Member] | Municipal [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair value measurements significant assumptions			Spread		Spread
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			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			Decrease [5]		Decrease [5]
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			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			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			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			40.00%		40.00%
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			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			Increase		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%		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%		20.00%
Equity Volatility [Member] | Level 3 [Member] | Other Contract [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Measurements, Sensitivity Analysis, Description			Increase		Increase
Equity Volatility [Member] | Level 3 [Member] | Maximum [Member] | Other Contract [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Range of Values-Unobservable Inputs			30.00%		30.00%
Equity Volatility [Member] | Level 3 [Member] | Minimum [Member] | Other Contract [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Range of Values-Unobservable Inputs			7.00%		12.00%
US Treasury Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	1,942		$ 1,942		$ 1,753
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
HLIC_FairValueAssetsLevel1ToLevel2TransfersAmount	0	0	0	0
US Treasury Securities [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	0		0		0
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	122		122		230
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	1,820		1,820		1,523
Foreign Government Debt Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	381		381		345
Foreign Government Debt Securities [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	8		8		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	373		373		328
Asset-backed Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	955		955		993
Asset-backed Securities [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	30		30		37
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	925		925		956
RMBS [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	1,615		1,615		1,760
RMBS [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	695		695		711
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	920		920		1,049
RMBS [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	695		695		704
Municipal [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	1,232		1,232		1,189
Municipal [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	70		70		72
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	1,162		1,162		1,117
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	53		53		56
Corporate [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	14,374		14,374		14,693
Corporate [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	506		506		566
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	13,868		13,868		14,127
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	260		260		265
CMBS [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	2,151		2,151		2,146
CMBS [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	32		32		21
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	2,119		2,119		2,125
CMBS [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	15		15		9
Collateralized Debt Obligations [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	993		993		940
Collateralized Debt Obligations [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Available-for-sale Securities, Debt Securities	92		92		260
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	901		901		680
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	1,433	1,776	1,433	1,776	1,684	1,626	1,786	1,625
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(1)	(11)	(13)	(12)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	(1)	(11)	(8)	(19)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	12	31	46	34
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	29	155	379	371
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	49	46	251	236
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	16	33	94	72
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	3	56	63	378
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	(171)	(162)	(386)	(305)
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	8	20	8	20	17	7	18	17
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	1	1	3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	2	5	3	8
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	0	1	2	3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0	3	0	5
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	(1)	0	(11)	0
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	30	20	30	20	37	33	7	5
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0	17	14	17
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	3	1	6	1
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0	2	0	2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	3	0	6	5
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	(3)	(1)	(21)	(4)
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	695	743	695	743	711	739	690	628
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	10	5	21	3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	1	93	107	241
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	47	37	136	113
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0	8	0	8
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0	0	0	2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	(8)	0	(8)	(10)
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	70	79	70	79	72	70	73	49
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	2	3	6
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0	4	0	16
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0	0	5
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0	0	0	8
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	0	0	0	0
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	506	635	506	635	566	608	717	534
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(1)	(11)	(13)	(12)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	(1)	(11)	(8)	(18)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	3	25	22	29
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	6	22	88	56
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	2	4	3	41
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	16	20	89	55
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0	56	57	363
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	(96)	(158)	(133)	233
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	32	23	32	23	21	33	15	62
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0	1	(1)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0	14	33	33
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	1	3	3	11
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0	0	0	2
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	0	(3)	(20)	(58)
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	92	256	92	256	260	$ 136	$ 266	$ 330
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0	0	0	(1)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(1)	(2)	(2)	(6)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	20	0	134	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	0	8	107	67
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	(63)	$ 0	(193)	$ 0
Hedge Funds, Equity [Member] | Level 3 [Member] | Equity Option [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	$ 2		$ 2		$ 17
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
Hedge Funds, Equity [Member] | Level 3 [Member] | Maximum [Member] | Equity Option [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Assumptions, Expected Volatility Rate			27.00%		30.00%
Hedge Funds, Equity [Member] | Level 3 [Member] | Minimum [Member] | Equity Option [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input [Abstract]
Fair Value Assumptions, Expected Volatility Rate			27.00%		27.00%