Investments (Details - FMUCG mortgages credit quality) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Included In Fixed Maturtities Amortized Cost [Abstract]
Fair value of Trading Securities Included In Fixed Maturities	$ 3,000,000		$ 3,000,000		$ 3,000,000
Fair value Of Hybrid Securities Included In Fixed Maturities	51,000,000		51,000,000		52,000,000
Fair value of Hybrid Securities Included In Equity Securities	95,000,000		95,000,000		86,000,000
Number Of Issues For Fixed Maturities With Decline In Fair Value From Amortized Cost [Abstract]
Number Of Issues Fixed Maturities One Year Or Less Investment Grade			293,000,000
Number Of Issues Fixed Maturities One Year Or Less Below Investment Grade			107,000,000
Number Of Issues Fixed Maturities More Than One Year Investment Grade			57,000,000
Number Of Issues Fixed Maturities More Than One Year Below Investment Grade			15,000,000
Investment Text Details [Abstract]
Other Than Temporary Impairments On Debt Securities Net	(2,000,000)	0	(2,000,000)	(1,000,000)
Fixed maturities pledged as collateral to brokers as required under certain futures contracts	59,000,000		59,000,000
Trading and hybrid securities excluded from gross unrealized appreciation	54,000,000		54,000,000		55,000,000
Investments supporting run-off settlement annuity business	2,500,000,000		2,500,000,000		2,500,000,000
Gross unrealized appreciation of investments supporting run-off settlement annuity business	474,000,000		474,000,000		476,000,000
Gross unrealized depreciation of investments supporting run-off settlement annuity business	27,000,000		27,000,000		33,000,000
Corporate Securities Included In Short Term Investments	1,300,000,000		1,300,000,000		1,100,000,000
Federal Government Securities Included In Short Term Investments	134,000,000		134,000,000		137,000,000
Money Market Funds Included In Short Term Investments	32,000,000		32,000,000		40,000,000
Average Recorded Investment Impaired Commercial Mortgage Loans	145,000,000		145,000,000		193,000,000
Potential Problem Mortgage Loan Restructured	65,000,000		65,000,000
Modified Loan At Current Market Terms	55,000,000		55,000,000
Modified Loan At Below Market Interest Rate	10,000,000		10,000,000
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	3,315,000,000		3,315,000,000		3,486,000,000
Schedule Of Financing Receivable Allowance For Credit Losses Table [Abstract]
Reserve balance, January 1,			12,000,000	17,000,000	17,000,000
Increase in valuation reserves			16,000,000	16,000,000
Charge-offs upon sales and repayments, net of recoveries			(1,000,000)	(11,000,000)
Transfers to foreclosed real estate			0	(12,000,000)
Reserve balance, June 30,	27,000,000	10,000,000	27,000,000	10,000,000	12,000,000
Financing Receivables Credit Quality Text Details [Abstract]
Problem And Potential Problem Mortgage Loans	380,000,000		380,000,000		383,000,000
Portfolio's Aggregate Debt Service Coverage Ratio	1.39		1.39		1.38
Portfolio's Loan-To-Value Ratio	71.00%		71.00%		74.00%
Portion At Amortized Cost Disclosure [Member]
Gross Unrealized Appreciation (Depreciation) on Fixed Maturities By Type [Abstract]
Federal government and agency	542,000,000		542,000,000		459,000,000
State and local government	2,249,000,000		2,249,000,000		2,305,000,000
Foreign government	1,191,000,000		1,191,000,000		1,095,000,000
Corporate	9,275,000,000		9,275,000,000		8,697,000,000
Federal agency mortgage-backed	9,000,000		9,000,000		9,000,000
Other mortgage-backed	62,000,000		62,000,000		80,000,000
Other asset-backed	742,000,000		742,000,000		752,000,000
Total	14,070,000,000		14,070,000,000		13,397,000,000
One Year Or Less [Abstract]
Investment grade	808,000,000		808,000,000
Below investment grade	178,000,000		178,000,000
More Than One Year [Abstract]
Investment grade	272,000,000		272,000,000
Below investment grade	26,000,000		26,000,000
Portion At Fair Value Fair Value Disclosure [Member]
Gross Unrealized Appreciation (Depreciation) on Fixed Maturities By Type [Abstract]
Federal government and agency	767,000,000		767,000,000		687,000,000
State and local government	2,450,000,000		2,450,000,000		2,467,000,000
Foreign government	1,256,000,000		1,256,000,000		1,154,000,000
Corporate	10,044,000,000		10,044,000,000		9,392,000,000
Federal agency mortgage-backed	10,000,000		10,000,000		10,000,000
Other mortgage-backed	70,000,000		70,000,000		87,000,000
Other asset-backed	854,000,000		854,000,000		857,000,000
Total	15,451,000,000		15,451,000,000		14,654,000,000
One Year Or Less [Abstract]
Investment grade	785,000,000		785,000,000
Below investment grade	175,000,000		175,000,000
More Than One Year [Abstract]
Investment grade	243,000,000		243,000,000
Below investment grade	22,000,000		22,000,000
Unrealized Gain [Member]
Gross Unrealized Appreciation (Depreciation) on Fixed Maturities By Type [Abstract]
Federal government and agency	226,000,000		226,000,000		229,000,000
State and local government	209,000,000		209,000,000		172,000,000
Foreign government	69,000,000		69,000,000		63,000,000
Corporate	802,000,000		802,000,000		744,000,000
Federal agency mortgage-backed	1,000,000		1,000,000		1,000,000
Other mortgage-backed	11,000,000		11,000,000		10,000,000
Other asset-backed	122,000,000		122,000,000		117,000,000
Total	1,440,000,000		1,440,000,000		1,336,000,000
Unrealized Loss Or Write Down [Member]
Gross Unrealized Appreciation (Depreciation) on Fixed Maturities By Type [Abstract]
Federal government and agency	(1,000,000)		(1,000,000)		(1,000,000)
State and local government	(8,000,000)		(8,000,000)		(10,000,000)
Foreign government	(4,000,000)		(4,000,000)		(4,000,000)
Corporate	(33,000,000)		(33,000,000)		(49,000,000)
Federal agency mortgage-backed	0		0		0
Other mortgage-backed	(3,000,000)		(3,000,000)		(3,000,000)
Other asset-backed	(10,000,000)		(10,000,000)		(12,000,000)
Total	(59,000,000)		(59,000,000)		(79,000,000)
One Year Or Less [Abstract]
Investment grade	(23,000,000)		(23,000,000)
Below investment grade	(3,000,000)		(3,000,000)
More Than One Year [Abstract]
Investment grade	(29,000,000)		(29,000,000)
Below investment grade	(4,000,000)		(4,000,000)
Debt Service Coverage Ratio 1.30x Or Greater [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	1,509,000,000		1,509,000,000
Debt Service Coverage Ratio 1.30x Or Greater [Member] | Loan To Value Ratio Below 50 Percent Member [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	389,000,000		389,000,000
Debt Service Coverage Ratio 1.30x Or Greater [Member] | Loan To Value Ratio 50 Percent to 59 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	349,000,000		349,000,000
Debt Service Coverage Ratio 1.30x Or Greater [Member] | Loan To Value Ratio 60 Percent to 69 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	443,000,000		443,000,000
Debt Service Coverage Ratio 1.30x Or Greater [Member] | Loan To Value Ratio 70 Percent to 79 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	180,000,000		180,000,000
Debt Service Coverage Ratio 1.30x Or Greater [Member] | Loan To Value Ratio 80 Percent to 89 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	112,000,000		112,000,000
Debt Service Coverage Ratio 1.30x Or Greater [Member] | Loan To Value Ratio 90 Percent to 99 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	36,000,000		36,000,000
Debt Service Coverage Ratio 1.30x Or Greater [Member] | Loan To Value Ratio 100 Percent Or Above [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	0		0
Debt Service Coverage Ratio 1.20x To 1.29x [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	481,000,000		481,000,000
Debt Service Coverage Ratio 1.20x To 1.29x [Member] | Loan To Value Ratio Below 50 Percent Member [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	0		0
Debt Service Coverage Ratio 1.20x To 1.29x [Member] | Loan To Value Ratio 50 Percent to 59 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	103,000,000		103,000,000
Debt Service Coverage Ratio 1.20x To 1.29x [Member] | Loan To Value Ratio 60 Percent to 69 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	140,000,000		140,000,000
Debt Service Coverage Ratio 1.20x To 1.29x [Member] | Loan To Value Ratio 70 Percent to 79 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	111,000,000		111,000,000
Debt Service Coverage Ratio 1.20x To 1.29x [Member] | Loan To Value Ratio 80 Percent to 89 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	82,000,000		82,000,000
Debt Service Coverage Ratio 1.20x To 1.29x [Member] | Loan To Value Ratio 90 Percent to 99 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	35,000,000		35,000,000
Debt Service Coverage Ratio 1.20x To 1.29x [Member] | Loan To Value Ratio 100 Percent Or Above [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	10,000,000		10,000,000
Debt Service Coverage Ratio 1.10x To 1.19x [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	411,000,000		411,000,000
Debt Service Coverage Ratio 1.10x To 1.19x [Member] | Loan To Value Ratio Below 50 Percent Member [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	4,000,000		4,000,000
Debt Service Coverage Ratio 1.10x To 1.19x [Member] | Loan To Value Ratio 50 Percent to 59 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	26,000,000		26,000,000
Debt Service Coverage Ratio 1.10x To 1.19x [Member] | Loan To Value Ratio 60 Percent to 69 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	36,000,000		36,000,000
Debt Service Coverage Ratio 1.10x To 1.19x [Member] | Loan To Value Ratio 70 Percent to 79 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	150,000,000		150,000,000
Debt Service Coverage Ratio 1.10x To 1.19x [Member] | Loan To Value Ratio 80 Percent to 89 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	115,000,000		115,000,000
Debt Service Coverage Ratio 1.10x To 1.19x [Member] | Loan To Value Ratio 90 Percent to 99 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	30,000,000		30,000,000
Debt Service Coverage Ratio 1.10x To 1.19x [Member] | Loan To Value Ratio 100 Percent Or Above [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	50,000,000		50,000,000
Debt Service Coverage Ratio 1.00x To 1.09x [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	394,000,000		394,000,000
Debt Service Coverage Ratio 1.00x To 1.09x [Member] | Loan To Value Ratio Below 50 Percent Member [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	15,000,000		15,000,000
Debt Service Coverage Ratio 1.00x To 1.09x [Member] | Loan To Value Ratio 50 Percent to 59 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	0		0
Debt Service Coverage Ratio 1.00x To 1.09x [Member] | Loan To Value Ratio 60 Percent to 69 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	0		0
Debt Service Coverage Ratio 1.00x To 1.09x [Member] | Loan To Value Ratio 70 Percent to 79 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	138,000,000		138,000,000
Debt Service Coverage Ratio 1.00x To 1.09x [Member] | Loan To Value Ratio 80 Percent to 89 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	94,000,000		94,000,000
Debt Service Coverage Ratio 1.00x To 1.09x [Member] | Loan To Value Ratio 90 Percent to 99 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	59,000,000		59,000,000
Debt Service Coverage Ratio 1.00x To 1.09x [Member] | Loan To Value Ratio 100 Percent Or Above [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	88,000,000		88,000,000
Debt Service Coverage Ratio Less Than 1.00x [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	520,000,000		520,000,000
Debt Service Coverage Ratio Less Than 1.00x [Member] | Loan To Value Ratio Below 50 Percent Member [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	9,000,000		9,000,000
Debt Service Coverage Ratio Less Than 1.00x [Member] | Loan To Value Ratio 50 Percent to 59 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	53,000,000		53,000,000
Debt Service Coverage Ratio Less Than 1.00x [Member] | Loan To Value Ratio 60 Percent to 69 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	74,000,000		74,000,000
Debt Service Coverage Ratio Less Than 1.00x [Member] | Loan To Value Ratio 70 Percent to 79 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	52,000,000		52,000,000
Debt Service Coverage Ratio Less Than 1.00x [Member] | Loan To Value Ratio 80 Percent to 89 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	72,000,000		72,000,000
Debt Service Coverage Ratio Less Than 1.00x [Member] | Loan To Value Ratio 90 Percent to 99 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	116,000,000		116,000,000
Debt Service Coverage Ratio Less Than 1.00x [Member] | Loan To Value Ratio 100 Percent Or Above [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	144,000,000		144,000,000
Loan To Value Ratio Below 50 Percent Member [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	417,000,000		417,000,000
Loan To Value Ratio 50 Percent to 59 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	531,000,000		531,000,000
Loan To Value Ratio 60 Percent to 69 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	693,000,000		693,000,000
Loan To Value Ratio 70 Percent to 79 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	631,000,000		631,000,000
Loan To Value Ratio 80 Percent to 89 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	475,000,000		475,000,000
Loan To Value Ratio 90 Percent to 99 Percent [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	276,000,000		276,000,000
Loan To Value Ratio 100 Percent Or Above [Member]
Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Line Items]
Commercial mortgage loan	292,000,000		292,000,000
Impaired Commercial Mortgage Loans Gross [Member]
Impaired Commercial Mortgage Loans And Valuation Reserves [Line Items]
Impaired commercial mortgage loans with valuation reserves	171,000,000		171,000,000		47,000,000
Impaired commercial mortgage loans with no valuation reserves	60,000,000		60,000,000		60,000,000
Impaired Commercial Mortgage Loans Reserves [Member]
Impaired Commercial Mortgage Loans And Valuation Reserves [Line Items]
Impaired commercial mortgage loans with valuation reserves	(27,000,000)		(27,000,000)		(12,000,000)
Impaired commercial mortgage loans with no valuation reserves	0		0		0
Impaired Commercial Mortgage Loans Net [Member]
Impaired Commercial Mortgage Loans And Valuation Reserves [Line Items]
Impaired commercial mortgage loans with valuation reserves	144,000,000		144,000,000		35,000,000
Impaired commercial mortgage loans with no valuation reserves	$ 60,000,000		$ 60,000,000		$ 60,000,000