Investments (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	$ 70,677,000,000		$ 69,796,000,000
Gross unrealized gains	7,306,000,000		7,585,000,000
Gross unrealized losses	(679,000,000)		(906,000,000)
Gross unrealized OTTI	(222,000,000)		(203,000,000)
Fair Value	77,082,000,000		76,272,000,000
Available-for-sale Securities, Debt Maturities, Amortized Cost
Due in one year or less	2,854,000,000
Due after one year through five years	12,020,000,000
Due after five years through ten years	22,816,000,000
Due after ten years	24,027,000,000
Subtotal - Amortized Cost	61,717,000,000
Available-for-sale Securities, Debt Maturities, Fair Value
Due in one year or less	2,914,000,000
Due after one year through five years	12,955,000,000
Due after five years through ten years	25,040,000,000
Due after ten years	26,850,000,000
Subtotal - Fair Value	67,759,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	4,266,000,000		3,993,000,000
Greater Than Twelve Months	2,288,000,000		2,490,000,000
Continuous Unrealized Loss Position, Total	6,554,000,000		6,483,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	334,000,000		338,000,000
Greater Than Twelve Months	567,000,000		771,000,000
Gross Unrealized Losses and OTTI, Total	901,000,000		1,109,000,000
Available For Sale Securities In Unrealized Loss Position Qualitative Disclosure Number Of Positions	828		897
Schedule Of Available For Sale Securities Residential And Commercial Mortgage At Risk [Line Items]
Total OTTI for AFS securities backed by pools of residential and commercial mortgages	21,000,000	21,000,000
OTTI for AFS securities backed by pools of residential and commercial mortgages recognized in OCI	(21,000,000)	(26,000,000)
OTTI for AFS securities backed by pools of residential and commercial mortgages recognized in net income (loss)	42,000,000	47,000,000
Available For Sale Securities In Unrealized Loss Position With Loss Severity Greater Than 20 Percent [Line Items]
Fair Value	821,000,000		1,055,000,000
Gross Unrealized Losses	434,000,000		625,000,000
Gross Unrealized OTTI	182,000,000		155,000,000
Number of securities	224		256
Decrease in gross AFS securities unrealized losses	208,000,000
Balance as of beginning of year	390,000,000	319,000,000
Increases attributable to:
Credit losses on securities for which an OTTI was not previously recognized	34,000,000	25,000,000
Credit losses on securities for which an OTTI was previously recognized	23,000,000	22,000,000
Decreases attributable to:
Securities sold	(37,000,000)	(14,000,000)
Balance as of end of year	410,000,000	352,000,000
Other Than Temporary Impairments Credit Losses [Line Items]
Amortized Cost	969,000,000		876,000,000
Gross Unrealized Gains	5,000,000		2,000,000
Gross Unrealized Losses and OTTI	(219,000,000)		(205,000,000)
Fair Value	755,000,000		673,000,000
OTTI in Credit Losses	410,000,000	352,000,000
Mortgage Loans On Real Estate Aging [Abstract]
Current	6,853,000,000		6,858,000,000
Sixty to ninety days past due	0		26,000,000
Greater than ninety days past due	99,000,000		76,000,000
Valuation allowance associated with impaired mortgage loans on real estate	27,000,000
Unamortized premium (discount)	13,000,000		13,000,000
Total carrying value	6,938,000,000		6,942,000,000
Information about impaired mortgage loans on real estate
Number of impaired mortgage loans on real estate	10		12
Principal balance of impaired mortgage loans on real estate	85,000,000		100,000,000
Valuation allowance associated with impaired mortgage loans on real estate	27,000,000
Carrying value of impaired mortgage loans on real estate	58,000,000		69,000,000
Average carrying value for impaired loans on real estate	64,000,000	55,000,000
Interest income recognized on impaired mortgage loans on real estate	0	1,000,000
Amount of interest income collected on impaired mortgage loans on real estate	0	1,000,000
Largest mortgage loan concentration in geographic region	32.00%		32.00%
Balance as of beginning-of-year	(31,000,000)
Balance as of end-of-period	(27,000,000)
Mortgage Loans Credit Quality [Line Items]
Principal amount of mortgage loans on real estate	6,952,000,000		6,960,000,000
Percentage of total mortgage loans on real estate	100.00%		100.00%
Alternative investments [Abstract]
Number of partnerships in alternative investment portfolio	97,000,000		96,000,000
Realized gain (loss) related to certain investments
Fixed maturity AFS securities, Gross gains	5,000,000	36,000,000
Fixed maturity AFS securities, Gross losses	(63,000,000)	(63,000,000)
Equity AFS securities, Gross gains	1,000,000	8,000,000
Gain (loss) on other investments	7,000,000	13,000,000
Associated amortization expense of DAC, VOBA, DSI and DFEL and changes in other contract holder funds	2,000,000	(9,000,000)
Total realized gain (loss) related to certain investments	(48,000,000)	(15,000,000)
OTTI Recognized in Net Income (Loss)
Gross OTTI recognized in net income (loss)	(57,000,000)	(50,000,000)
Associated amortization expense of DAC, VOBA, DSI and DFEL	10,000,000	9,000,000
Net OTTI recognized in net income (loss), pre-tax	(47,000,000)	(41,000,000)
Portion of OTTI Recognized in OCI
Gross OTTI recognized in OCI	58,000,000	8,000,000
Change in DAC, VOBA, DSI and DFEL	(8,000,000)	(5,000,000)
Net portion of OTTI recognized in OCI, pre-tax	50,000,000	3,000,000
Evaluation Of Credit Losses [Line Items]
Projected default rate on existing delinquencies on MBS (low end of range)	25.00%
Projected default rate on existing delinquencies on MBS (high end of range)	100.00%
Severity of second lien loans	100.00%
Severity of first lien loans	30.00%
Carrying Value Of Payables For Collateral On Investments [Abstract]
Collateral payable held for derivative investments	2,132,000,000		2,980,000,000
Securities pledged under securities lending agreements	200,000,000		200,000,000
Securities pledged under reverse repurchase agreements	280,000,000		280,000,000
Securities pledged for Treasury Asset-Backed Securities Loan Facility ('TALF')	163,000,000		173,000,000
Securities pledged for Federal Home Loan Bank of Indianapolis Securities ('FHLBI')	100,000,000		100,000,000
Total payables for collateral on investments	2,875,000,000		3,733,000,000
Fair Value Of Related Investments Or Collateral [Abstract]
Collateral payable held for derivative investments	2,132,000,000		2,980,000,000
Securities pledged under securities lending agreements	192,000,000		193,000,000
Securities pledged under reverse repurchase agreements	292,000,000		294,000,000
Securities pledged for Treasury Asset-Backed Securities Loan Facility ('TALF')	188,000,000		199,000,000
Securities pledged for Federal Home Loan Bank of Indianapolis Securities ('FHLBI')	153,000,000		142,000,000
Total payables for collateral on investments	2,957,000,000		3,808,000,000
Percentage of the fair value of domestic securities obtained as collateral under securities lending agreements	102.00%
Percentage of the fair value of foreign securities obtained as collateral under securities lending agreements	105.00%
Percentage of the fair value of securities obtained as collateral under reverse repurchase agreements	95.00%
Percentage of the fair value of TALF securities obtained as collateral under securities pledged for TALF	90.00%
Percentage of the fair value of FHLBI securities obtained as collateral under securities pledged for FHLBI (low end of range)	85.00%
Percentage of the fair value of FHLBI securities obtained as collateral under securities pledged for FHLBI (high end of range)	95.00%
Increase (decrease) in payables for collateral on investments
Collateral payable held for derivative investments	(848,000,000)	(70,000,000)
Securities pledged under securities lending agreements	0	1,000,000
Securities pledged for TALF	(10,000,000)	(36,000,000)
Total increase (decrease) in payables for collateral on investments	(858,000,000)	(105,000,000)
Investment commitments	653,000,000
Investment commitments for limited partnerships	186,000,000
Investment commitments for private placements	399,000,000
Investment commitments for mortgage loans on real estate	68,000,000
Federal Home Loan Mortgage Corporation [Member]
Concentration Risk [Line Items]
Fair value	4,600,000,000		5,000,000,000
Concentration risk, percentage	5.00%		5.00%
Fannie Mae [Member]
Concentration Risk [Line Items]
Fair value	2,600,000,000		2,600,000,000
Concentration risk, percentage	3.00%		3.00%
Cmo Industry [Member]
Concentration Risk [Line Items]
Fair value	5,300,000,000		5,600,000,000
Concentration risk, percentage	6.00%		6.00%
Electric Industry [Member]
Concentration Risk [Line Items]
Fair value	7,700,000,000		7,700,000,000
Concentration risk, percentage	8.00%		8.00%
Corporate bonds [Member]
Evaluation Of Credit Losses [Line Items]
Percentage of fair value rated as investment grade	96.00%		96.00%
Amortized cost of portfolio rated below investment grade	2,800,000,000		2,600,000,000
Fair value of portfolio rated below investment grade	2,600,000,000		2,400,000,000
OTTI securities recognized in net income (loss), Recovery percentage of amortized cost	92.00%		98.00%
CDOs [Member]
Evaluation Of Credit Losses [Line Items]
Percentage of fair value rated as investment grade	97.00%		97.00%
Amortized cost of portfolio rated below investment grade	3,000,000		3,000,000
Fair value of portfolio rated below investment grade	3,000,000		3,000,000
OTTI securities recognized in net income (loss), Recovery percentage of amortized cost	0.00%		0.00%
Fixed maturity securities [Member] | Corporate bonds [Member]
OTTI Recognized in Net Income (Loss)
Gross OTTI recognized in net income (loss)	(19,000,000)	(3,000,000)
Fixed maturity securities [Member] | CDOs [Member]
OTTI Recognized in Net Income (Loss)
Gross OTTI recognized in net income (loss)	0	(1,000,000)
Fixed maturity securities [Member] | Hybrid and redeemable preferred securities [Member]
OTTI Recognized in Net Income (Loss)
Gross OTTI recognized in net income (loss)	0	(2,000,000)
Fixed maturity securities [Member] | CMBS [Member]
OTTI Recognized in Net Income (Loss)
Gross OTTI recognized in net income (loss)	(20,000,000)	(24,000,000)
Fixed maturity securities [Member] | RMBS [Member]
OTTI Recognized in Net Income (Loss)
Gross OTTI recognized in net income (loss)	(18,000,000)	(20,000,000)
Loan to value ratio less than sixty five [Member]
Mortgage Loans Credit Quality [Line Items]
Principal amount of mortgage loans on real estate	5,419,000,000		5,338,000,000
Percentage of total mortgage loans on real estate	77.90%		76.70%
Debt-service coverage ratio	1.62		1.61
Loan to value ratio sixty five to seventy four [Member]
Mortgage Loans Credit Quality [Line Items]
Principal amount of mortgage loans on real estate	1,121,000,000		1,198,000,000
Percentage of total mortgage loans on real estate	16.10%		17.20%
Debt-service coverage ratio	1.39		1.37
Loan to value ratio seventy five to one hundred [Member]
Mortgage Loans Credit Quality [Line Items]
Principal amount of mortgage loans on real estate	311,000,000		308,000,000
Percentage of total mortgage loans on real estate	4.50%		4.40%
Debt-service coverage ratio	0.90		0.92
Loan to value ratio, greater than one hundred [Member]
Mortgage Loans Credit Quality [Line Items]
Principal amount of mortgage loans on real estate	101,000,000		116,000,000
Percentage of total mortgage loans on real estate	1.50%		1.70%
Debt-service coverage ratio	0.37		0.36
Corporate bonds [Member]
Available For Sale Securities In Unrealized Loss Position With Loss Severity Greater Than 20 Percent [Line Items]
Balance as of beginning of year			51,000,000
Decreases attributable to:
Balance as of end of year	63,000,000		51,000,000
Other Than Temporary Impairments Credit Losses [Line Items]
Amortized Cost	242,000,000		169,000,000
Gross Unrealized Gains	1,000,000		1,000,000
Gross Unrealized Losses and OTTI	(100,000,000)		(67,000,000)
Fair Value	143,000,000		103,000,000
OTTI in Credit Losses	63,000,000		51,000,000
RMBS [Member]
Available For Sale Securities In Unrealized Loss Position With Loss Severity Greater Than 20 Percent [Line Items]
Balance as of beginning of year			301,000,000
Decreases attributable to:
Balance as of end of year	290,000,000		301,000,000
Other Than Temporary Impairments Credit Losses [Line Items]
Amortized Cost	688,000,000		690,000,000
Gross Unrealized Gains	4,000,000		1,000,000
Gross Unrealized Losses and OTTI	(100,000,000)		(128,000,000)
Fair Value	592,000,000		563,000,000
OTTI in Credit Losses	290,000,000		301,000,000
CMBS [Member]
Available For Sale Securities In Unrealized Loss Position With Loss Severity Greater Than 20 Percent [Line Items]
Balance as of beginning of year			38,000,000
Decreases attributable to:
Balance as of end of year	57,000,000		38,000,000
Other Than Temporary Impairments Credit Losses [Line Items]
Amortized Cost	39,000,000		17,000,000
Gross Unrealized Gains	0		0
Gross Unrealized Losses and OTTI	(19,000,000)		(10,000,000)
Fair Value	20,000,000		7,000,000
OTTI in Credit Losses	57,000,000		38,000,000
Available For Sale Securities Continuous Unrealized Loss Position Less Than 6 Months [Member]
Available For Sale Securities In Unrealized Loss Position With Loss Severity Greater Than 20 Percent [Line Items]
Fair Value	81,000,000		385,000,000
Gross Unrealized Losses	32,000,000		125,000,000
Gross Unrealized OTTI	3,000,000		31,000,000
Number of securities	23		56
Available For Sale Securities Continuous Unrealized Loss Position More Than 6 Months And Less Than 9 Months [Member]
Available For Sale Securities In Unrealized Loss Position With Loss Severity Greater Than 20 Percent [Line Items]
Fair Value	111,000,000		53,000,000
Gross Unrealized Losses	42,000,000		30,000,000
Gross Unrealized OTTI	14,000,000		12,000,000
Number of securities	19		18
Available For Sale Securities Continuous Unrealized Loss Position More Than 9 Months And Less Than 12 Months [Member]
Available For Sale Securities In Unrealized Loss Position With Loss Severity Greater Than 20 Percent [Line Items]
Fair Value	50,000,000		2,000,000
Gross Unrealized Losses	17,000,000		0
Gross Unrealized OTTI	14,000,000		1,000,000
Number of securities	16		7
Available For Sale Securities Continuous Unrealized Loss Position 12 Months Or Longer [Member]
Available For Sale Securities In Unrealized Loss Position With Loss Severity Greater Than 20 Percent [Line Items]
Fair Value	579,000,000		615,000,000
Gross Unrealized Losses	343,000,000		470,000,000
Gross Unrealized OTTI	151,000,000		111,000,000
Number of securities	166		175
Total Available For Sale Securities Backed By Pools Of Residential Mortgages At Risk [Member]
Schedule Of Available For Sale Securities Residential And Commercial Mortgage At Risk [Line Items]
Amortized Cost	1,875,000,000		2,023,000,000
Fair Value	1,480,000,000		1,553,000,000
Unrealized Loss	(395,000,000)		(470,000,000)
Total Available For Sale Securities Backed By Pools Of Commercial Mortgages At Risk [Member]
Schedule Of Available For Sale Securities Residential And Commercial Mortgage At Risk [Line Items]
Amortized Cost	367,000,000		472,000,000
Fair Value	270,000,000		344,000,000
Unrealized Loss	(97,000,000)		(128,000,000)
Total Available For Sale Securities Backed By Pools Of Residential And Commercial Mortgages At Risk [Member]
Schedule Of Available For Sale Securities Residential And Commercial Mortgage At Risk [Line Items]
Amortized Cost	2,242,000,000		2,495,000,000
Fair Value	1,750,000,000		1,897,000,000
Unrealized Loss	(492,000,000)		(598,000,000)
Available For Sale Securities Backed By Pools Of Residential Mortgages Subject To Detailed Analysis [Member]
Schedule Of Available For Sale Securities Residential And Commercial Mortgage At Risk [Line Items]
Amortized Cost	1,862,000,000		2,015,000,000
Fair Value	1,467,000,000		1,545,000,000
Unrealized Loss	(395,000,000)		(470,000,000)
Available For Sale Securities Backed By Pools Of Commercial Mortgages Subject To Detailed Analysis [Member]
Schedule Of Available For Sale Securities Residential And Commercial Mortgage At Risk [Line Items]
Amortized Cost	109,000,000		126,000,000
Fair Value	59,000,000		61,000,000
Unrealized Loss	(50,000,000)		(65,000,000)
Available For Sale Securities Backed By Pools Of Residential And Commercial Mortgages Subject To Detailed Analysis [Member]
Schedule Of Available For Sale Securities Residential And Commercial Mortgage At Risk [Line Items]
Amortized Cost	1,971,000,000		2,141,000,000
Fair Value	1,526,000,000		1,606,000,000
Unrealized Loss	(445,000,000)		(535,000,000)
Fixed maturity securities [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	70,563,000,000		69,661,000,000
Gross unrealized gains	7,287,000,000		7,569,000,000
Gross unrealized losses	(672,000,000)		(894,000,000)
Gross unrealized OTTI	(222,000,000)		(203,000,000)
Fair Value	76,956,000,000		76,133,000,000
Available-for-sale Securities, Debt Maturities, Amortized Cost
Subtotal - Amortized Cost	70,563,000,000
Available-for-sale Securities, Debt Maturities, Fair Value
Subtotal - Fair Value	76,956,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	4,254,000,000		3,955,000,000
Greater Than Twelve Months	2,288,000,000		2,490,000,000
Continuous Unrealized Loss Position, Total	6,542,000,000		6,445,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	327,000,000		326,000,000
Greater Than Twelve Months	567,000,000		771,000,000
Gross Unrealized Losses and OTTI, Total	894,000,000		1,097,000,000
Fixed maturity securities [Member] | Corporate bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	55,255,000,000		53,661,000,000
Gross unrealized gains	5,854,000,000		6,185,000,000
Gross unrealized losses	(407,000,000)		(517,000,000)
Gross unrealized OTTI	(103,000,000)		(68,000,000)
Fair Value	60,599,000,000		59,261,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	3,186,000,000		2,848,000,000
Greater Than Twelve Months	1,335,000,000		1,452,000,000
Continuous Unrealized Loss Position, Total	4,521,000,000		4,300,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	194,000,000		162,000,000
Greater Than Twelve Months	316,000,000		423,000,000
Gross Unrealized Losses and OTTI, Total	510,000,000		585,000,000
Fixed maturity securities [Member] | U.S. government bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	450,000,000		439,000,000
Gross unrealized gains	41,000,000		55,000,000
Gross unrealized losses	(5,000,000)		0
Gross unrealized OTTI	0		0
Fair Value	486,000,000		494,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	213,000,000
Greater Than Twelve Months	1,000,000
Continuous Unrealized Loss Position, Total	214,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	5,000,000
Greater Than Twelve Months	0
Gross Unrealized Losses and OTTI, Total	5,000,000
Fixed maturity securities [Member] | Foreign government bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	585,000,000		668,000,000
Gross unrealized gains	65,000,000		65,000,000
Gross unrealized losses	0		0
Gross unrealized OTTI	0		0
Fair Value	650,000,000		733,000,000
Fixed maturity securities [Member] | MBS [Member]
Available-for-sale Securities, Debt Maturities, Amortized Cost
Subtotal - Amortized Cost	8,729,000,000
Available-for-sale Securities, Debt Maturities, Fair Value
Subtotal - Fair Value	9,095,000,000
Fixed maturity securities [Member] | RMBS [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	7,196,000,000		7,690,000,000
Gross unrealized gains	524,000,000		548,000,000
Gross unrealized losses	(48,000,000)		(73,000,000)
Gross unrealized OTTI	(100,000,000)		(126,000,000)
Fair Value	7,572,000,000		8,039,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	572,000,000		565,000,000
Greater Than Twelve Months	351,000,000		429,000,000
Continuous Unrealized Loss Position, Total	923,000,000		994,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	99,000,000		125,000,000
Greater Than Twelve Months	49,000,000		74,000,000
Gross Unrealized Losses and OTTI, Total	148,000,000		199,000,000
Fixed maturity securities [Member] | CMBS [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	1,533,000,000		1,642,000,000
Gross unrealized gains	76,000,000		73,000,000
Gross unrealized losses	(67,000,000)		(106,000,000)
Gross unrealized OTTI	(19,000,000)		(9,000,000)
Fair Value	1,523,000,000		1,600,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	119,000,000		178,000,000
Greater Than Twelve Months	130,000,000		146,000,000
Continuous Unrealized Loss Position, Total	249,000,000		324,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	22,000,000		15,000,000
Greater Than Twelve Months	64,000,000		100,000,000
Gross Unrealized Losses and OTTI, Total	86,000,000		115,000,000
Fixed maturity securities [Member] | CDOs [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	117,000,000		121,000,000
Gross unrealized gains	0		0
Gross unrealized losses	(15,000,000)		(19,000,000)
Gross unrealized OTTI	0		0
Fair Value	102,000,000		102,000,000
Available-for-sale Securities, Debt Maturities, Amortized Cost
Subtotal - Amortized Cost	117,000,000
Available-for-sale Securities, Debt Maturities, Fair Value
Subtotal - Fair Value	102,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	3,000,000		9,000,000
Greater Than Twelve Months	75,000,000		80,000,000
Continuous Unrealized Loss Position, Total	78,000,000		89,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	1,000,000		1,000,000
Greater Than Twelve Months	14,000,000		18,000,000
Gross Unrealized Losses and OTTI, Total	15,000,000		19,000,000
Fixed maturity securities [Member] | State and municipal bonds [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	3,497,000,000		3,490,000,000
Gross unrealized gains	637,000,000		566,000,000
Gross unrealized losses	(8,000,000)		(9,000,000)
Gross unrealized OTTI	0		0
Fair Value	4,126,000,000		4,047,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	2,000,000		31,000,000
Greater Than Twelve Months	26,000,000		30,000,000
Continuous Unrealized Loss Position, Total	28,000,000		61,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	0		0
Greater Than Twelve Months	8,000,000		9,000,000
Gross Unrealized Losses and OTTI, Total	8,000,000		9,000,000
Fixed maturity securities [Member] | Hybrid and redeemable preferred securities [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	1,256,000,000		1,277,000,000
Gross unrealized gains	62,000,000		50,000,000
Gross unrealized losses	(122,000,000)		(170,000,000)
Gross unrealized OTTI	0		0
Fair Value	1,196,000,000		1,157,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	159,000,000		324,000,000
Greater Than Twelve Months	370,000,000		353,000,000
Continuous Unrealized Loss Position, Total	529,000,000		677,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	6,000,000		23,000,000
Greater Than Twelve Months	116,000,000		147,000,000
Gross Unrealized Losses and OTTI, Total	122,000,000		170,000,000
Fixed maturity securities [Member] | VIEs' fixed maturity securities
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	674,000,000		673,000,000
Gross unrealized gains	28,000,000		27,000,000
Gross unrealized losses	0		0
Gross unrealized OTTI	0		0
Fair Value	702,000,000		700,000,000
Equity securities [Member]
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities
Amortized cost	114,000,000		135,000,000
Gross unrealized gains	19,000,000		16,000,000
Gross unrealized losses	(7,000,000)		(12,000,000)
Gross unrealized OTTI	0		0
Fair Value	126,000,000		139,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Less Than or Equal to Twelve Months	12,000,000		38,000,000
Greater Than Twelve Months	0		0
Continuous Unrealized Loss Position, Total	12,000,000		38,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI
Less Than or Equal to Twelve Months	7,000,000		12,000,000
Greater Than Twelve Months	0		0
Gross Unrealized Losses and OTTI, Total	$ 7,000,000		$ 12,000,000