Fair Value (Tables)

12 Months Ended

Dec. 31, 2011

Financial Assets Measured At Fair Value On A Recurring Basis


			Fair Value Measurements Using
	Fair Value		Quoted Prices in Active Markets (Level 1)		Other Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
	(in millions)
December 31, 2011
Cash equivalents	$	1,205	$	1,205	$	0	$	0
Debt securities:
U.S. Treasury and other U.S. government corporations and agencies:
U.S. Treasury and agency obligations		725		0		725		0
Mortgage-backed securities		1,784		0		1,784		0
Tax-exempt municipal securities		2,856		0		2,840		16
Mortgage-backed securities:
Residential		44		0		44		0
Commercial		381		0		381		0
Asset-backed securities		83		0		82		1
Corporate debt securities		3,580		0		3,556		24
Redeemable preferred stock		0		0		0		0

Total debt securities		9,453		0		9,412		41
Securities lending invested collateral		0		0		0		0

Total invested assets	$	10,658	$	1,205	$	9,412	$	41

December 31, 2010
Cash equivalents	$	1,606	$	1,606	$	0	$	0
Debt securities:
U.S. Treasury and other U.S. government corporations and agencies:
U.S. Treasury and agency obligations		712		0		712		0
Mortgage-backed securities		1,664		0		1,664		0
Tax-exempt municipal securities		2,433		0		2,381		52
Mortgage-backed securities:
Residential		56		0		56		0
Commercial		321		0		321		0
Asset-backed securities		150		0		148		2
Corporate debt securities		3,032		0		3,025		7
Redeemable preferred stock		5		0		0		5

Total debt securities		8,373		0		8,307		66
Securities lending invested collateral		50		25		25		0

Total invested assets	$	10,029	$	1,631	$	8,332	$	66

Changes In Fair Value Of Assets Measured Using Significant Unobservable Inputs


	For the years ended December 31,
	2011									2010									2009
	Auction Rate Securities			Private Placements/ Venture Capital			Total			Auction Rate Securities			Private Placements/ Venture Capital			Total			Auction Rate Securities			Private Placements/ Venture Capital			Total
	(in millions)
Beginning balance at January 1	$	52		$	14		$	66		$	69		$	24		$	93		$	74		$	18		$	92
Total gains or losses:
Realized in earnings		1			1			2			0			6			6			0			0			0
Unrealized in other comprehensive income		1			0			1			2			(4	)		(2	)		0			5			5
Purchases		0			17			17			0			3			3			0			0			0
Sales		(38	)		(7	)		(45	)		(3	)		(13	)		(16	)		(1	)		0			(1	)
Settlements		0			0			0			(16	)		(2	)		(18	)		(4	)		(2	)		(6	)
Transfers into Level 3		0			0			0			0			0			0			0			3			3

Balance at December 31	$	16		$	25		$	41		$	52		$	14		$	66		$	69		$	24		$	93

- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

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- Definition

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

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