Investment Securities (Tables)

3 Months Ended

Mar. 31, 2012

Investment Securities [Abstract]

Schedule Of Investment Securities Classified As Current And Long-Term

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(in millions)
March 31, 2012
U.S. Treasury and other U.S. government corporations and agencies:
U.S. Treasury and agency obligations	$	535	$	15	$	0		$	550
Mortgage-backed securities		1,676		84		(2	)		1,758
Tax-exempt municipal securities		2,750		145		(3	)		2,892
Mortgage-backed securities:
Residential		41		1		(1	)		41
Commercial		405		32		0			437
Asset-backed securities		73		1		0			74
Corporate debt securities		3,571		277		(7	)		3,841
Total debt securities	$	9,051	$	555	$	(13	)	$	9,593
December 31, 2011
U.S. Treasury and other U.S. government corporations and agencies:
U.S. Treasury and agency obligations	$	705	$	20	$	0		$	725
Mortgage-backed securities		1,701		85		(2	)		1,784
Tax-exempt municipal securities		2,709		149		(2	)		2,856
Mortgage-backed securities:
Residential		46		0		(2	)		44
Commercial		356		25		0			381
Asset-backed securities		82		1		0			83
Corporate debt securities		3,329		262		(11	)		3,580
Total debt securities	$	8,928	$	542	$	(17	)	$	9,453

Schedule Of Gross Unrealized Losses And Fair Values Of Securities

	Less than 12 months					12 months or more					Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
	(in millions)
March 31, 2012
U.S. Treasury and other U.S. government corporations and agencies:
U.S. Treasury and agency obligations	$	70	$	0		$	0	$	0		$	70	$	0
Mortgage-backed securities		103		(1	)		27		(1	)		130		(2	)
Tax-exempt municipal securities		159		(2	)		25		(1	)		184		(3	)
Mortgage-backed securities:
Residential		1		0			23		(1	)		24		(1	)
Commercial		0		0			0		0			0		0
Asset-backed securities		14		0			1		0			15		0
Corporate debt securities		280		(7	)		5		0			285		(7	)
Total debt securities	$	627	$	(10	)	$	81	$	(3	)	$	708	$	(13	)
December 31, 2011
U.S. Treasury and other U.S. government corporations and agencies:
U.S. Treasury and agency obligations	$	117	$	0		$	0	$	0		$	117	$	0
Mortgage-backed securities		67		(1	)		18		(1	)		85		(2	)
Tax-exempt municipal securities		53		0			48		(2	)		101		(2	)
Mortgage-backed securities:
Residential		3		0			24		(2	)		27		(2	)
Commercial		14		0			0		0			14		0
Asset-backed securities		16		0			4		0			20		0
Corporate debt securities		355		(10	)		41		(1	)		396		(11	)
Total debt securities	$	625	$	(11	)	$	135	$	(6	)	$	760	$	(17	)

Schedule Of Realized Gains (Losses) Related To Investment Securities Included Within Investment Income

	For the three  months ended March 31,
	2012			2011
	(in millions)
Gross realized gains	$	5		$	5
Gross realized losses		(1	)		(1	)
Net realized capital gains	$	4		$	4

Schedule Of Contractual Maturities Of Debt Securities Available For Sale

	Amortized		Fair
	Cost		Value
	(in millions)
Due within one year	$	361	$	365
Due after one year through five years		1,832		1,903
Due after five years through ten years		2,882		3,069
Due after ten years		1,781		1,946
Mortgage and asset-backed securities		2,195		2,310
Total debt securities	$	9,051	$	9,593