Investments (tables)

6 Months Ended

Jun. 30, 2011

Investments disclosure

Amortized cost and fair value of investments in fixed maturities [Text Block]

	Amortized		Gross Unrealized				Fair
(at June 30, 2011, in millions)	Cost		Gains		Losses		Value
U.S. Treasury securities and obligations of U.S. Government and government agencies and authorities	$	2,057	$	89	$	—	$	2,146
Obligations of states, municipalities and political subdivisions:
Pre-refunded	6,603		517		1		7,119
All other	30,626		1,470		35		32,061
Total obligations of states, municipalities and political subdivisions	37,229		1,987		36		39,180
Debt securities issued by foreign governments	1,980		52		1		2,031
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	3,529		259		16		3,772
All other corporate bonds	14,939		913		42		15,810
Redeemable preferred stock	33		4		—		37
Total	$	59,767	$	3,304	$	95	$	62,976

	Amortized		Gross Unrealized				Fair
(at December 31, 2010, in millions)	Cost		Gains		Losses		Value
U.S. Treasury securities and obligations of U.S. Government and government agencies and authorities	$	1,914	$	94	$	—	$	2,008
Obligations of states, municipalities and political subdivisions:
Pre-refunded	6,787		505		1		7,291
All other	31,277		1,121		154		32,244
Total obligations of states, municipalities and political subdivisions	38,064		1,626		155		39,535
Debt securities issued by foreign governments	2,156		50		4		2,202
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	3,952		248		36		4,164
All other corporate bonds	14,051		876		51		14,876
Redeemable preferred stock	33		2		—		35
Total	$	60,170	$	2,896	$	246	$	62,820

Cost and fair value of investments in equity securities [Text Block]

			Gross Unrealized				Fair
(at June 30, 2011, in millions)	Cost		Gains		Losses		Value
Common stock	$	294	$	104	$	—	$	398
Non-redeemable preferred stock	167		37		2		202
Total	$	461	$	141	$	2	$	600

			Gross Unrealized				Fair
(at December 31, 2010, in millions)	Cost		Gains		Losses		Value
Common stock	$	198	$	106	$	—	$	304
Non-redeemable preferred stock	174		46		5		215
Total	$	372	$	152	$	5	$	519

Unrealized investments losses [Text Block]

	Less than 12 months					12 months or longer					Total
(at June 30, 2011, in millions)		Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Fixed maturities
U.S. Treasury securities and obligations of U.S. Government and government agencies and authorities		$	—	$	—		$	—	$	—		$	—	$	—
Obligations of states, municipalities and political subdivisions		2,440		30			133		6			2,573		36
Debt securities issued by foreign governments		221		1			—		—			221		1
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities		191		4			167		12			358		16
All other corporate bonds		1,517		27			94		15			1,611		42
Redeemable preferred stock		—		—			—		—			—		—
Total fixed maturities		4,369		62			394		33			4,763		95
Equity securities
Common stock		44		—			—		—			44		—
Non-redeemable preferred stock		12		—			39		2			51		2
Total equity securities		56		—			39		2			95		2
Total		$	4,425	$	62		$	433	$	35		$	4,858	$	97

	Less than 12 months				12 months or longer				Total
(at December 31, 2010, in millions)	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
Fixed maturities
U.S. Treasury securities and obligations of U.S. Government and government agencies and authorities	$	155	$	—	$	—	$	—	$	155	$	—
Obligations of states, municipalities and political subdivisions	5,854		149		139		6		5,993		155
Debt securities issued by foreign governments	419		4		13		—		432		4
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	77		1		420		35		497		36
All other corporate bonds	1,255		32		185		19		1,440		51
Redeemable preferred stock	—		—		3		—		3		—
Total fixed maturities	7,760		186		760		60		8,520		246
Equity securities
Common stock	3		—		3		—		6		—
Non-redeemable preferred stock	45		1		49		4		94		5
Total equity securities	48		1		52		4		100		5
Total	$	7,808	$	187	$	812	$	64	$	8,620	$	251

Securities continuously in an unrealized loss position of greater than 20% of amortized cost by length of time [Text Block]

	Period For Which Fair Value Is Less Than 80% of Amortized Cost
(in millions)	3 Months or Less		Greater Than 3 Months, 6 Months or Less		Greater Than 6 Months, 12 Months or Less		Greater Than 12 Months		Total
Fixed maturities
Mortgage-backed securities	$	3	$	—	$	—	$	—	$	3
Other	1		3		—		10		14
Total fixed maturities	4		3		—		10		17
Equity securities	—		—		—		—		—
Total	$	4	$	3	$	—	$	10	$	17

Impairment charges included in net realized investment gains (losses) [Text Block]

	Three Months Ended  June 30,				Six Months Ended June 30,
(in millions)	2011		2010		2011		2010
Fixed maturities
U.S. Treasury securities and obligations of U.S. Government and government agencies and authorities	$	—	$	—	$	—	$	—
Obligations of states, municipalities and political subdivisions	—		—		—		—
Debt securities issued by foreign governments	—		—		—		—
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	2		1		4		2
All other corporate bonds	1		—		3		5
Redeemable preferred stock	—		—		—		—
Total fixed maturities	3		1		7		7
Equity securities
Common stock	1		1		1		2
Non-redeemable preferred stock	—		—		—		—
Total equity securities	1		1		1		2
Other investments	—		2		—		5
Total	$	4	$	4	$	8	$	14

Roll-forward of the credit component of other-than-temporary impairments on fixed maturities recognized in the consolidated statement of income (loss) for which a portion of the other-than-temporary impairment was recognized in accumulated other changes in equity from nonowner sources [Text Block]

(for the three months ended June 30, 2011, in millions)	Cumulative OTTI Credit Losses Recognized for Securities Held, Beginning of Period		Additions for OTTI Securities Where No Credit Losses Were Previously Recognized		Additions for OTTI Securities Where Credit Losses Have Been Previously Recognized		Reductions Due to Sales/Defaults of Credit- Impaired Securities		Adjustments to Book Value of Credit- Impaired Securities due to Changes in Cash Flows		Cumulative OTTI Credit Losses Recognized for Securities Still Held, End of Period
Fixed maturities
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	$	49	$	—	$	2	$	—	$	—	$	51
All other corporate bonds	90		—		1		—		1		92
Total fixed maturities	$	139	$	—	$	3	$	—	$	1	$	143

(for the six months ended June 30, 2011, in millions)	Cumulative OTTI Credit Losses Recognized for Securities Held, Beginning of Year		Additions for OTTI Securities Where No Credit Losses Were Previously Recognized		Additions for OTTI Securities Where Credit Losses Have Been Previously Recognized		Reductions Due to Sales/Defaults of Credit- Impaired Securities			Adjustments to Book Value of Credit- Impaired Securities due to Changes in Cash Flows		Cumulative OTTI Credit Losses Recognized for Securities Still Held, End of Period
Fixed maturities
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	$	47	$	—	$	4	$	—		$	—	$	51
All other corporate bonds	88		1		2		(1		)	2		92
Total fixed maturities	$	135	$	1	$	6	$	(1	)	$	2	$	143

(for the three months ended June 30, 2010, in millions)	Cumulative OTTI Credit Losses Recognized for Securities Held, Beginning of Period		Additions for OTTI Securities Where No Credit Losses Were Previously Recognized		Additions for OTTI Securities Where Credit Losses Have Been Previously Recognized		Reductions Due to Sales/Defaults of Credit- Impaired Securities			Adjustments to Book Value of Credit- Impaired Securities due to Changes in Cash Flows		Cumulative OTTI Credit Losses Recognized for Securities Still Held, End of Period
Fixed maturities
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	$	47	$	—	$	1	$	(3	)	$	—	$	45
All other corporate bonds	92		—		—		(7		)	—		85
Total fixed maturities	$	139	$	—	$	1	$	(10	)	$	—	$	130

(for the six months ended June 30, 2010, in millions)	Cumulative OTTI Credit Losses Recognized for Securities Held, Beginning of Year		Additions for OTTI Securities Where No Credit Losses Were Previously Recognized		Additions for OTTI Securities Where Credit Losses Have Been Previously Recognized		Reductions Due to Sales/Defaults of Credit- Impaired Securities			Adjustments to Book Value of Credit- Impaired Securities due to Changes in Cash Flows		Cumulative OTTI Credit Losses Recognized for Securities Still Held, End of Period
Fixed maturities
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	$	46	$	—	$	2	$	(3	)	$	—	$	45
All other corporate bonds	93		—		2		(11		)	1		85
Total fixed maturities	$	139	$	—	$	4	$	(14	)	$	1	$	130