Fair Value Measurements Level 4 Significant Unobservable Inputs (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value Inputs, Comparability Adjustments	0.00%		0.00%
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 4,318,000,000	$ 4,428,000,000	$ 4,318,000,000	$ 4,428,000,000	$ 4,422,000,000	$ 4,491,000,000	$ 4,184,000,000	$ 3,911,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	(22,000,000)	6,000,000	(80,000,000)	(8,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	35,000,000	48,000,000	67,000,000	31,000,000
Alternative Investments, Fair Value Disclosure	2,445,000,000		2,445,000,000		2,456,000,000
Available-for-sale Securities, Debt Securities	57,834,000,000		57,834,000,000		56,003,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	459,000,000	190,000,000	1,013,000,000	667,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(328,000,000)	(226,000,000)	(474,000,000)	(306,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	(100,000,000)	(90,000,000)	(294,000,000)	(129,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	59,000,000	491,000,000	128,000,000	559,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	(276,000,000)	(175,000,000)	(464,000,000)	(297,000,000)
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(27,000,000)	4,000,000	(87,000,000)	5,000,000
Business Combination, Contingent Consideration, Liability	60		$ 60
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Significant Inputs			The future expected payout is discounted back to the valuation date using a risk-adjusted discount rate of 18.8%. The risk-adjusted discount rate is an internally generated and significant unobservable input to fair value.
HIG_FairValueAssetsLevel2ToLevel1TransfersAmounts	0	0	$ 0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	192,000,000	171,000,000	192,000,000	171,000,000	201,000,000	277,000,000	154,000,000	139,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	2,000,000	0	3,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	3,000,000	2,000,000	7,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	(198,000,000)	(440,000,000)	(198,000,000)	(440,000,000)	(299,000,000)	(219,000,000)	(386,000,000)	(288,000,000)
Available-for-sale Securities, Debt Securities	3,795,000,000		3,795,000,000		3,810,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	38,000,000	(38,000,000)	134,000,000	(119,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	(17,000,000)	(16,000,000)	(33,000,000)	(33,000,000)
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)	38,000,000	(38,000,000)	134,000,000	(119,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	13,000,000	22,000,000	111,000,000	61,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(2,000,000)	(3,000,000)	(7,000,000)	(9,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	(34,000,000)	(6,000,000)	(42,000,000)	(16,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	7,000,000	3,000,000	10,000,000	6,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	71,000,000	2,000,000	86,000,000	(17,000,000)
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	1,000,000
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, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	176,000,000	279,000,000	176,000,000	279,000,000	228,000,000	185,000,000	271,000,000	267,000,000
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	(9,000,000)	2,000,000	(57,000,000)	(8,000,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases	0	0	5,000,000	16,000,000
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	0	0	0	(2,000,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	0	6,000,000	0	6,000,000
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, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0	6,000,000	0	6,000,000	$ 11,000,000		14,000,000	16,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		1,000,000	0	(1,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		1,000,000	4,000,000	6,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(1,000,000)	(2,000,000)	(2,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		(3,000,000)	(13,000,000)	(3,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		6,000,000		(10,000,000)
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	$ 0	(1,000,000)
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
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			1816.00%		1273.00%
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			9.00%		10.00%
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			466.00%		366.00%
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
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			944.00%		1302.00%
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			108.00%		122.00%
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			303.00%		359.00%
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
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			222.00%		286.00%
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			166.00%		135.00%
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			183.00%		221.00%
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			624.00%		1830.00%
Fair Value Inputs, Prepayment Rate			14.00%		20.00%
Fair Value Inputs, Probability of Default			10.00%		11.00%
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			40.00%		16.00%
Fair Value Inputs, Prepayment Rate			0.00%		0.00%
Fair Value Inputs, Probability of Default			2.00%		0.00%
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			126.00%		192.00%
Fair Value Inputs, Prepayment Rate			5.00%		4.00%
Fair Value Inputs, Probability of Default			5.00%		5.00%
Fair Value Inputs, Loss Severity			71.00%		75.00%
Reinsurance Recoverable [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	57,000,000		$ 57,000,000		$ 73,000,000	60,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	(7,000,000)		(23,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(4,000,000)		(7,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	0		$ 0
Spread [Member] | 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, Significant Assumptions			Spread (encompasses prepayment, default risk and loss severity)		Spread (encompasses prepayment, default risk and loss severity)
Spread [Member] | 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, Significant Assumptions			Spread		Spread
Spread [Member] | 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, Significant Assumptions			Spread		Spread
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
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 [5]		Decrease [5]
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	2,354,000,000		$ 2,354,000,000		$ 2,382,000,000
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	96,000,000		96,000,000		82,000,000
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	1,297,000,000		1,297,000,000		1,171,000,000
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	29,000,000		29,000,000		64,000,000
RMBS [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	4,219,000,000		4,219,000,000		4,767,000,000
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	2,011,000,000		2,011,000,000		1,972,000,000
Municipal [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	12,284,000,000		12,284,000,000		11,486,000,000
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	86,000,000		86,000,000		118,000,000
Corporate [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	26,044,000,000		26,044,000,000		25,666,000,000
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	1,136,000,000		1,136,000,000		1,080,000,000
CMBS [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Debt Securities	5,173,000,000		5,173,000,000		4,936,000,000
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	98,000,000		98,000,000		80,000,000
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	2,457,000,000		2,457,000,000		1,916,000,000
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	339,000,000		339,000,000		414,000,000
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	2,002,000,000		2,002,000,000		1,963,000,000
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	70,000,000		70,000,000		101,000,000
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	489,000,000		489,000,000		510,000,000
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	51,000,000		$ 51,000,000		$ 52,000,000
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Withdrawal Utilization [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			Increase		Increase
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Withdrawal Utilization [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 Unobservable Input Range			100.00%		100.00%
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Withdrawal Utilization [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 Unobservable Input Range			15.00%		15.00%
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Withdrawal Rates [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			Increase		Increase
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Withdrawal Rates [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 Unobservable Input Range			8.00%		8.00%
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Withdrawal Rates [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 Unobservable Input Range			0.00%		0.00%
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Lapse Rates [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			Decrease		Decrease
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Lapse Rates [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 Unobservable Input Range			40.00%		40.00%
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Lapse Rates [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 Unobservable Input Range			0.00%		0.00%
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Reset Elections [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			Increase		Increase
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Reset Elections [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 Unobservable Input Range			75.00%		75.00%
Living Benefits Required to be Fair Valued and the GMWB Reinsurance Derivative [Member] | Reset Elections [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 Unobservable Input Range			20.00%		20.00%
Equity Contract [Member] | 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, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	2,000,000	1,000,000	$ 2,000,000	1,000,000	$ 0	4,000,000	5,000,000	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	(2,000,000)	(4,000,000)	(3,000,000)	(15,000,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases	0	0	5,000,000	16,000,000
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	0	0	$ 0	0
Other 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			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	73,000,000		$ 73,000,000		$ 100,000,000
Other Contract [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 Assumptions, Expected Volatility Rate			30.00%		30.00%
Other Contract [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 Assumptions, Expected Volatility Rate			9.00%		12.00%
Other Contract [Member] | 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, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	0	4,000,000	$ 0	4,000,000	$ 1,000,000	0	5,000,000	7,000,000
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	0	(1,000,000)	(1,000,000)	(3,000,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	0	0	$ 0	0
Other Contract [Member] | Equity Volatility [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			Increase		Increase
Other Contract [Member] | Equity Volatility [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 Unobservable Input Range			30.00%		30.00%
Other Contract [Member] | Equity Volatility [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 Unobservable Input Range			9.00%		12.00%
Equity Option [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	171,000,000		$ 171,000,000		$ 188,000,000
Equity Option [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 Assumptions, Expected Volatility Rate			26.00%		28.00%
Equity Option [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 Assumptions, Expected Volatility Rate			15.00%		17.00%
Interest Rate Swap [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	(29,000,000)		$ (29,000,000)		$ (29,000,000)
Interest Rate Swap [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 Measurements, Unobservable Swap Curve			3.00%		3.00%
Interest Rate Swap [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 Measurements, Unobservable Swap Curve			3.00%		3.00%
Interest Rate Swaption [Member] | Long [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	3,000,000		$ 3,000,000		$ 8,000,000
Interest Rate Swaption [Member] | Long [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 Assumptions, Expected Volatility Rate			2.00%		2.00%
Interest Rate Swaption [Member] | Long [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 Assumptions, Expected Volatility Rate			2.00%		2.00%
Variance Swap [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	(39,000,000)		$ (39,000,000)		$ (36,000,000)
Variance Swap [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 Assumptions, Expected Volatility Rate			20.00%		23.00%
Variance Swap [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 Assumptions, Expected Volatility Rate			16.00%		20.00%
Reinsurance Recoverable [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		106,000,000		106,000,000			99,000,000	83,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		3,000,000		16,000,000
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		(4,000,000)		(7,000,000)
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
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(7,000,000)	3,000,000	$ (23,000,000)	16,000,000
U.S. Macro Hedge Program [Member] | 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, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	160,000,000	141,000,000	160,000,000	141,000,000	$ 167,000,000	159,000,000	145,000,000	147,000,000
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	1,000,000	(4,000,000)	(7,000,000)	(4,000,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	0	0	0	(2,000,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	0	0	0	0
U.S. GMWB Hedging Instruments [Member] | 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, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	40,000,000	165,000,000	40,000,000	165,000,000	81,000,000	46,000,000	144,000,000	135,000,000
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	(6,000,000)	15,000,000	(41,000,000)	24,000,000
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	0	6,000,000	0	6,000,000
Interest Rate Contract [Member] | 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, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	(26,000,000)	(32,000,000)	(26,000,000)	(32,000,000)	(21,000,000)	(24,000,000)	(28,000,000)	(22,000,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	(2,000,000)	(4,000,000)	(5,000,000)	(10,000,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3	0	0	0	0
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, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	3,795,000,000	3,769,000,000	3,795,000,000	3,769,000,000	3,810,000,000	3,870,000,000	3,554,000,000	3,313,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	(8,000,000)	(1,000,000)	(3,000,000)	(15,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	36,000,000	40,000,000	70,000,000	17,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	446,000,000	165,000,000	889,000,000	582,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(330,000,000)	(226,000,000)	(472,000,000)	(300,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	(66,000,000)	(78,000,000)	(239,000,000)	(105,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	52,000,000	488,000,000	118,000,000	553,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	205,000,000	173,000,000	378,000,000	(276,000,000)
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(12,000,000)	(1,000,000)	(13,000,000)	(2,000,000)
Available-for-sale Securities [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	98,000,000	97,000,000	98,000,000	97,000,000	99,000,000	99,000,000	92,000,000	93,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0	1,000,000	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(1,000,000)	5,000,000	(5,000,000)	7,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0	2,000,000	4,000,000	2,000,000
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	(3,000,000)	0	(5,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0		0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	0	0	0	0
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, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	96,000,000	41,000,000	96,000,000	41,000,000	82,000,000	125,000,000	32,000,000	37,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	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	25,000,000		70,000,000	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(1,000,000)	(4,000,000)	(6,000,000)	(7,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0	13,000,000	26,000,000	18,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	53,000,000	0	76,000,000	7,000,000
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, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	29,000,000	72,000,000	29,000,000	72,000,000	64,000,000	66,000,000	76,000,000	60,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0	1,000,000	0	1,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	4,000,000	3,000,000	9,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	6,000,000	1,000,000	6,000,000	15,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(1,000,000)	(1,000,000)	(2,000,000)	(2,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	(2,000,000)	(9,000,000)	(2,000,000)	(11,000,000)
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	40,000,000	0	40,000,000	0
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, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	2,011,000,000	1,873,000,000	2,011,000,000	1,873,000,000	1,972,000,000	2,048,000,000	1,886,000,000	1,622,000,000
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)	27,000,000	10,000,000	33,000,000	(4,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	50,000,000	97,000,000	223,000,000	430,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(114,000,000)	(101,000,000)	(210,000,000)	(158,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0	0	(7,000,000)	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0	3,000,000	0	5,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	0	22,000,000	0	(22,000,000)
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, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	86,000,000	90,000,000	86,000,000	90,000,000	118,000,000	117,000,000	50,000,000	49,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	4,000,000	0	4,000,000	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(1,000,000)	4,000,000	4,000,000	5,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	0	20,000,000	0	20,000,000
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	(34,000,000)		(40,000,000)	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0	16,000,000	0	16,000,000
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] | 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, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	1,136,000,000	1,136,000,000	1,136,000,000	1,136,000,000	1,080,000,000	1,078,000,000	834,000,000	854,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	(12,000,000)	(1,000,000)	(6,000,000)	(14,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	14,000,000	19,000,000	30,000,000	12,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	46,000,000	37,000,000	215,000,000	67,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(4,000,000)	(50,000,000)	(40,000,000)	(55,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	(30,000,000)	(66,000,000)	(190,000,000)	(91,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	52,000,000	455,000,000	92,000,000	513,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	8,000,000	(92,000,000)	45,000,000	150,000,000
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(12,000,000)	(1,000,000)	(12,000,000)	(1,000,000)
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, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	98,000,000	79,000,000	98,000,000	79,000,000	80,000,000	117,000,000	134,000,000	150,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0	0	(1,000,000)	(1,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	1,000,000	5,000,000	1,000,000	(3,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	19,000,000	10,000,000	75,000,000	50,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(3,000,000)	(9,000,000)	(6,000,000)	(18,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	0	(3,000,000)	0	(3,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0	1,000,000	0	1,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	36,000,000	59,000,000	51,000,000	(97,000,000)
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)	0	0	(1,000,000)	(1,000,000)
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, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	339,000,000	478,000,000	339,000,000	478,000,000	$ 414,000,000	319,000,000	542,000,000	541,000,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	0	(1,000,000)	0	(1,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	(5,000,000)	(2,000,000)	(1,000,000)	(2,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	300,000,000	0	300,000,000	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	(207,000,000)	(61,000,000)	(208,000,000)	(60,000,000)
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
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3	68,000,000	0	$ 166,000,000	0
Hedge Funds, Equity [Member] | Equity Option [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	6,000,000		$ 6,000,000		$ 17,000,000
Hedge Funds, Equity [Member] | Equity Option [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 Assumptions, Expected Volatility Rate			28.00%		30.00%
Hedge Funds, Equity [Member] | Equity Option [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 Assumptions, Expected Volatility Rate			26.00%		27.00%
Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	39,000,000	(38,000,000)	$ 136,000,000	(119,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	(17,000,000)	(16,000,000)	(33,000,000)	(33,000,000)
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)	39,000,000	(38,000,000)	136,000,000	(119,000,000)
Other Policyholder Funds and Benefits Payable [Member] | 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]
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	(171,000,000)	(440,000,000)	(171,000,000)	(440,000,000)	$ (274,000,000)	(193,000,000)	(386,000,000)	(288,000,000)
Other Liabilities [Member] | Equity Contract [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	38,000,000		38,000,000		33,000,000
Other Liabilities [Member] | Equity Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	1,000,000		1,000,000		0
Other Liabilities [Member] | Macro Hedge Program [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	74,000,000		74,000,000		50,000,000
Other Liabilities [Member] | 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]
Derivative Assets (Liabilities), at Fair Value, Net	74,000,000		74,000,000		47,000,000
Other Liabilities [Member] | U.S. GMWB Hedging Instruments [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	40,000,000		40,000,000		20,000,000
Other Liabilities [Member] | U.S. 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]
Derivative Assets (Liabilities), at Fair Value, Net	(5,000,000)		(5,000,000)		21,000,000
Other Liabilities [Member] | Interest Rate Contract [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	(488,000,000)		(488,000,000)		(542,000,000)
Other Liabilities [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]
Derivative Assets (Liabilities), at Fair Value, Net	$ (26,000,000)		$ (26,000,000)		$ (21,000,000)
Separate Accounts [Member] | Hedge Funds [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Redemption Restriction, Percentage	43.00%		43.00%		39.00%
Separate Accounts [Member] | Private Equity Funds [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Redemption Restriction, Percentage	13.00%		13.00%		11.00%
Equity Linked Notes [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	$ (37,000,000)	(28,000,000)	$ (37,000,000)	(28,000,000)	$ (33,000,000)	(36,000,000)	(25,000,000)	(26,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	(1,000,000)	(3,000,000)	(4,000,000)	(2,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	0		0	0
Equity Linked Notes [Member] | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements		0
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(1,000,000)	(3,000,000)	(4,000,000)	(2,000,000)
Obligations [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	(27,000,000)		(27,000,000)		(25,000,000)	(26,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	(1,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	0		0
Obligations [Member] | Other Liabilities [Member] | 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]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)	(1,000,000)	0	(2,000,000)	0
Guaranteed Minimum Withdrawal Benefit [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	(134,000,000)	(412,000,000)	(134,000,000)	(412,000,000)	$ (241,000,000)	$ (157,000,000)	$ (361,000,000)	$ (262,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	40,000,000	(35,000,000)	140,000,000	(117,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	(17,000,000)	(16,000,000)	(33,000,000)	(33,000,000)
Guaranteed Minimum Withdrawal Benefit [Member] | Other Policyholder Funds and Benefits Payable [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)	$ 40,000,000	$ (35,000,000)	$ 140,000,000	$ (117,000,000)