Investments (tables)

6 Months Ended

Jun. 30, 2013

Investments disclosure

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

	Amortized		Gross Unrealized				Fair
(at June 30, 2013, in millions)	Cost		Gains		Losses		Value
U.S. Treasury securities and obligations of U.S. government and government agencies and authorities	$	2,058	$	53	$	8	$	2,103
Obligations of states, municipalities and political subdivisions:
Pre-refunded	9,395		538		1		9,932
All other	26,224		1,215		303		27,136
Total obligations of states, municipalities and political subdivisions	35,619		1,753		304		37,068
Debt securities issued by foreign governments	2,039		44		4		2,079
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	2,410		197		12		2,595
All other corporate bonds	18,342		858		234		18,966
Redeemable preferred stock	26		6		—		32
Total	$	60,494	$	2,911	$	562	$	62,843

	Amortized		Gross Unrealized				Fair
(at December 31, 2012, in millions)	Cost		Gains		Losses		Value
U.S. Treasury securities and obligations of U.S. government and government agencies and authorities	$	2,148	$	75	$	1	$	2,222
Obligations of states, municipalities and political subdivisions:
Pre-refunded	8,458		567		—		9,025
All other	27,405		2,262		11		29,656
Total obligations of states, municipalities and political subdivisions	35,863		2,829		11		38,681
Debt securities issued by foreign governments	2,185		72		—		2,257
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	2,744		255		2		2,997
All other corporate bonds	17,863		1,360		20		19,203
Redeemable preferred stock	26		7		—		33
Total	$	60,829	$	4,598	$	34	$	65,393

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

			Gross Unrealized				Fair
(at June 30, 2013, in millions)	Cost		Gains		Losses		Value
Common stock	$	373	$	206	$	2	$	577
Non-redeemable preferred stock	90		34		—		124
Total	$	463	$	240	$	2	$	701

			Gross Unrealized				Fair
(at December 31, 2012, in millions)	Cost		Gains		Losses		Value
Common stock	$	366	$	148	$	4	$	510
Non-redeemable preferred stock	96		39		—		135
Total	$	462	$	187	$	4	$	645

Unrealized investment losses [Table Text Block]

	Less than 12 months				12 months or longer				Total
(at June 30, 2013, 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	$	760	$	8	$	—	$	—	$	760	$	8
Obligations of states, municipalities and political subdivisions	4,585		303		29		1		4,614		304
Debt securities issued by foreign governments	551		4		—		—		551		4
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	425		10		23		2		448		12
All other corporate bonds	5,348		224		67		10		5,415		234
Total fixed maturities	11,669		549		119		13		11,788		562
Equity securities
Common stock	48		2		—		—		48		2
Non-redeemable preferred stock	36		—		—		—		36		—
Total equity securities	84		2		—		—		84		2
Total	$	11,753	$	551	$	119	$	13	$	11,872	$	564

	Less than 12 months				12 months or longer				Total
(at December 31, 2012, 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	$	589	$	1	$	—	$	—	$	589	$	1
Obligations of states, municipalities and political subdivisions	611		9		45		2		656		11
Debt securities issued by foreign governments	186		—		2		—		188		—
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	70		—		36		2		106		2
All other corporate bonds	1,097		13		89		7		1,186		20
Total fixed maturities	2,553		23		172		11		2,725		34
Equity securities
Common stock	40		4		—		—		40		4
Non-redeemable preferred stock	13		—		—		—		13		—
Total equity securities	53		4		—		—		53		4
Total	$	2,606	$	27	$	172	$	11	$	2,778	$	38

Securities continuously in an unrealized loss position of greater than 20% of amortized cost by length of time [Table 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	$	—	$	—	$	—	$	—	$	—
Other	2		—		—		4		6
Total fixed maturities	2		—		—		4		6
Equity securities	—		—		—		—		—
Total	$	2	$	—	$	—	$	4	$	6

Impairment charges included in net realized investment gains [Table Text Block]

	Three Months Ended  June 30,				Six Months Ended June 30,
(in millions)	2013		2012		2013		2012
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	1		2		2		3
All other corporate bonds	—		1		—		3
Redeemable preferred stock	—		—		—		—
Total fixed maturities	1		3		2		6
Equity securities
Common stock	1		—		1		—
Non-redeemable preferred stock	—		—		—		—
Total equity securities	1		—		1		—
Other investments	—		1		4		2
Total	$	2	$	4	$	7	$	8

Roll-forward of the credit component of other-than-temporary impairments on fixed maturities recognized in the consolidated statement of income for which a portion of the other-than-temporary impairment was recognized in other comprehensive income [Table Text Block]

	2013
(for the three months ended June 30, 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	$	65	$	—	$	1	$	—	$	1	$	67
All other corporate bonds	103		—		—		—		1		104
Total fixed maturities	$	168	$	—	$	1	$	—	$	2	$	171

(for the six months ended June 30, in millions )
Fixed maturities
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	$	63	$	—	$	2	$	—	$	2	$	67
All other corporate bonds	102		—		—		—		2		104
Total fixed maturities	$	165	$	—	$	2	$	—	$	4	$	171

	2012
(for the three months ended June 30, 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	$	59	$	—	$	2	$	—	$	—	$	61
All other corporate bonds	97		—		1		—		1		99
Total fixed maturities	$	156	$	—	$	3	$	—	$	1	$	160

(for the six months ended June 30, in millions )
Fixed maturities
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities	$	58	$	—	$	3	$	—	$	—	$	61
All other corporate bonds	94		—		3		—		2		99
Total fixed maturities	$	152	$	—	$	6	$	—	$	2	$	160