INVESTMENT SECURITIES (Tables)

3 Months Ended

Mar. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Schedule of Investment Securities Classified as Current and Long-Term

Investment securities classified as current and long-term were as follows at March 31, 2015 and December 31, 2014, respectively:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(in millions)
March 31, 2015
U.S. Treasury and other U.S. government corporations and agencies:
U.S. Treasury and agency obligations	$	356	$	10	$	—		$	366
Mortgage-backed securities	1,704		56		(2		)	1,758
Tax-exempt municipal securities	2,628		132		(4		)	2,756
Mortgage-backed securities:
Residential	16		—		—			16
Commercial	890		21		(20		)	891
Asset-backed securities	138		1		—			139
Corporate debt securities	3,318		333		(5		)	3,646
Total debt securities	$	9,050	$	553	$	(31	)	$	9,572
December 31, 2014
U.S. Treasury and other U.S. government corporations and agencies:
U.S. Treasury and agency obligations	$	365	$	10	$	(1	)	$	374
Mortgage-backed securities	1,453		50		(5		)	1,498
Tax-exempt municipal securities	2,931		140		(3		)	3,068
Mortgage-backed securities:
Residential	17		—		—			17
Commercial	846		16		(19		)	843
Asset-backed securities	28		1		—			29
Corporate debt securities	3,432		299		(13		)	3,718
Total debt securities	$	9,072	$	516	$	(41	)	$	9,547

Schedule of Gross Unrealized Losses and Fair Value of Securities

Gross unrealized losses and fair values aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position were as follows at March 31, 2015 and December 31, 2014, respectively:

	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, 2015
U.S. Treasury and other U.S. government corporations and agencies:
U.S. Treasury and agency obligations	$	47	$	—		$	24	$	—		$	71	$	—
Mortgage-backed securities	57		—			98		(2		)	155		(2		)
Tax-exempt municipal securities	265		(3		)	30		(1		)	295		(4		)
Mortgage-backed securities:
Residential	—		—			5		—			5		—
Commercial	50		(1		)	262		(19		)	312		(20		)
Asset-backed securities	27		—			—		—			27		—
Corporate debt securities	173		(3		)	40		(2		)	213		(5		)
Total debt securities	$	619	$	(7	)	$	459	$	(24	)	$	1,078	$	(31	)
December 31, 2014
U.S. Treasury and other U.S. government corporations and agencies:
U.S. Treasury and agency obligations	$	79	$	—		$	80	$	(1	)	$	159	$	(1	)
Mortgage-backed securities	22		—			320		(5		)	342		(5		)
Tax-exempt municipal securities	131		(1		)	118		(2		)	249		(3		)
Mortgage-backed securities:
Residential	1		—			4		—			5		—
Commercial	31		(1		)	267		(18		)	298		(19		)
Asset-backed securities	13		—			—		—			13		—
Corporate debt securities	219		(6		)	128		(7		)	347		(13		)
Total debt securities	$	496	$	(8	)	$	917	$	(33	)	$	1,413	$	(41	)

Schedule of Realized Gains (Losses) Related to Investment Securities Included Within Investment Income

The detail of realized gains (losses) related to investment securities and included within investment income was as follows for the three months ended March 31, 2015 and 2014:

	Three months ended March 31,
	2015			2014
	(in millions)
Gross realized gains	$	17		$	1
Gross realized losses	(8		)	—
Net realized capital gains	$	9		$	1

Schedule of Contractual Maturity of Debt Securities Available for Sale

The contractual maturities of debt securities available for sale at March 31, 2015, regardless of their balance sheet classification, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

	Amortized Cost		Fair Value
	(in millions)
Due within one year	$	478	$	482
Due after one year through five years	1,918		2,033
Due after five years through ten years	1,795		1,906
Due after ten years	2,111		2,347
Mortgage and asset-backed securities	2,748		2,804
Total debt securities	$	9,050	$	9,572