FAIR VALUE (Tables)

9 Months Ended

Sep. 30, 2012

Financial Assets Measured At Fair Value On A Recurring Basis

The following table summarizes our fair value measurements at September 30, 2012 and December 31, 2011, respectively, for 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)
September 30, 2012
Cash equivalents	$	897	$	897	$	0	$	0
Debt securities:
U.S. Treasury and other U.S. government corporations and agencies:
U.S. Treasury and agency obligations		563		0		563		0
Mortgage-backed securities		1,942		0		1,942		0
Tax-exempt municipal securities		2,878		0		2,865		13
Mortgage-backed securities:
Residential		36		0		36		0
Commercial		658		0		658		0
Asset-backed securities		37		0		36		1
Corporate debt securities		3,781		0		3,757		24
Total debt securities		9,895		0		9,857		38
Total invested assets	$	10,792	$	897	$	9,857	$	38
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
Total debt securities		9,453		0		9,412		41
Total invested assets	$	10,658	$	1,205	$	9,412	$	41

Changes In Fair Value Of Assets Measured Using Significant Unobservable Inputs

During the three and nine months ended September 30, 2012 and 2011, the changes in the fair value of the assets measured using significant unobservable inputs (Level 3) were comprised of the following:

	For the three months ended September 30,
	2012								2011
	Private Placements/ Venture Capital		Auction Rate Securities			Total			Private Placements/ Venture Capital		Auction Rate Securities			Total
	(in millions)
Beginning balance at July 1	$	25	$	15		$	40		$	31	$	21		$	52
Total gains or losses:
Realized in earnings		0		0			0			0		0			0
Unrealized in other comprehensive income		0		0			0			0		0			0
Purchases		0		0			0			0		0			0
Sales		0		(2	)		(2	)		0		0			0
Settlements		0		0			0			0		0			0
Balance at September 30	$	25	$	13		$	38		$	31	$	21		$	52
	For the nine months ended September 30,
	2012								2011
	Private Placements/ Venture Capital		Auction Rate Securities			Total			Private Placements/ Venture Capital		Auction Rate Securities			Total
	(in millions)
Beginning balance at January 1	$	25	$	16		$	41		$	14	$	52		$	66
Total gains or losses:
Realized in earnings		0		0			0			0		0			0
Unrealized in other comprehensive income		0		0			0			0		2			2
Purchases		0		0			0			17		0			17
Sales		0		(3	)		(3	)		0		(33	)		(33	)
Settlements		0		0			0			0		0			0
Balance at September 30	$	25	$	13		$	38		$	31	$	21		$	52