Investments (Tables)

12 Months Ended

Dec. 31, 2011

Investments [Tables] [Abstract]

Fixed maturities and equity securities table

(In millions)	2011		2010
Included in fixed maturities:
Trading securities (amortized cost: $2; $3)	$	2	$	3
Hybrid securities (amortized cost: $26; $45)		28		52
Total	$	30	$	55
Included in equity securities:
Hybrid securities (amortized cost: $90; $108)	$	65	$	86

Amortized cost and fair value for fixed maturities table

	Amortized		Fair
(In millions)	Cost		Value
Due in one year or less	$	955	$	967
Due after one year through five years		4,719		5,060
Due after five years through ten years		4,997		5,581
Due after ten years		2,699		3,565
Mortgage and other asset-backed securities		859		1,014
Total	$	14,229	$	16,187

Gross unrealized appreciation (depreciation) fixed maturities table

(In millions)				December 31, 2011
			Unrealized		Unrealized
	Amortized		Appre-		Depre-		Fair
	Cost		ciation		ciation		Value
Federal government and agency	$	552	$	406	$	-	$	958
State and local government		2,185		274		(3)		2,456
Foreign government		1,173		103		(2)		1,274
Corporate		9,460		1,070		(45)		10,485
Federal agency mortgage-backed		9		-		-		9
Other mortgage-backed		73		10		(4)		79
Other asset-backed		777		160		(11)		926
Total	$	14,229	$	2,023	$	(65)	$	16,187
(In millions)		December 31, 2010
Federal government and agency	$	459	$	229	$	(1)	$	687
State and local government		2,305		172		(10)		2,467
Foreign government		1,095		63		(4)		1,154
Corporate		8,697		744		(49)		9,392
Federal agency mortgage-backed		9		1		-		10
Other mortgage-backed		80		10		(3)		87
Other asset-backed		752		117		(12)		857
Total	$	13,397	$	1,336	$	(79)	$	14,654

Declines in fair value table

(Dollars in millions)	December 31, 2011
	Fair		Amortized		Unrealized		Number
	Value		Cost		Depreciation		of Issues
Fixed maturities:
One year or less:
Investment grade	$	572	$	591	$	(19)	167
Below investment grade	$	75	$	80	$	(5)	52
More than one year:
Investment grade	$	268	$	300	$	(32)	62
Below investment grade	$	28	$	37	$	(9)	13

Distribution of commercial mortgage loans and real estate investments table

(In millions)	2011		2010
Property type
Office buildings	$	1,014	$	1,043
Apartment buildings		705		835
Industrial		670		619
Hotels		542		533
Retail facilities		297		418
Other		73		38
Total	$	3,301	$	3,486
Geographic region
Pacific	$	893	$	931
South Atlantic		870		752
New England		450		585
Central		511		519
Middle Atlantic		391		385
Mountain		186		314
Total	$	3,301	$	3,486

Financing Receivable Credit Quality Indicators Table [Text Block]

(In millions)				December 31, 2011
	Debt Service Coverage Ratio
		1.30x or		1.20x to		1.10x to		1.00x to		Less than
Loan-to-Value Ratios		Greater		1.29x		1.19x		1.09x		1.00x		Total
Below 50%	$	225	$	55	$	3	$	50	$	9	$	342
50% to 59%		444		47		26		-		53		570
60% to 69%		646		140		42		-		77		905
70% to 79%		117		132		120		159		33		561
80% to 89%		99		81		79		72		71		402
90% to 99%		36		35		30		58		116		275
100% or above		-		10		50		51		135		246
Total	$	1,567	$	500	$	350	$	390	$	494	$	3,301
(In millions)	December 31, 2010
	Debt Service Coverage Ratio
		1.30x or		1.20x to		1.10x to		1.00x to		Less than
Loan-to-Value Ratios		Greater		1.29x		1.19x		1.09x		1.00x		Total
Below 50%	$	324	$	-	$	-	$	-	$	29	$	353
50% to 59%		409		54		56		-		-		519
60% to 69%		533		73		5		28		25		664
70% to 79%		138		79		57		55		11		340
80% to 89%		267		186		165		151		69		838
90% to 99%		15		54		181		185		135		570
100% or above		-		-		47		43		112		202
Total	$	1,686	$	446	$	511	$	462	$	381	$	3,486

Impaired commercial mortgage loans and related valuation reserves table

(In millions)		2011					2010
		Gross		Reserves		Net		Gross		Reserves		Net
Impaired commercial mortgage loans with valuation reserves	$	154	$	(19)	$	135	$	47	$	(12)	$	35
Impaired commercial mortgage loans with no valuation reserves		60		-		60		60		-		60
Total	$	214	$	(19)	$	195	$	107	$	(12)	$	95

Schedule of Changes in Valuation Reserves For Commercial Mortgage Loans Table

(In millions)	2011		2010
Reserve balance, January 1,	$	12	$	17
Increase in valuation reserves		16		24
Charge-offs upon sales and repayments, net of recoveries		(1)		(12)
Transfers to foreclosed real estate		(8)		(17)
Reserve balance, December 31,	$	19	$	12

Other long-term investments

(In millions)	2011		2010
Real estate entities	$	665	$	394
Securities partnerships		298		288
Interest rate and foreign currency swaps		12		19
Mezzanine loans		31		13
Other		52		45
Total	$	1,058	$	759