CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Cash and Cash Equivalents [Abstract]
Cash	$ 5		$ 5		$ 4
Cash equivalents	40		40		103
Cash and cash equivalents	45	$ 22	45	$ 22	107	$ 80
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	1,145		1,145		1,110
Marketable securities, Unrealized Gains	4		4		3
Marketable securities, Unrealized Losses	(2)		(2)		(3)
Marketable securities, Fair Value	1,147		1,147		1,110
Cash and marketables securities, Cost Basis	1,190		1,190		1,217
Cash and marketable securities, Unrealized Gains	4		4		3
Cash and marketable securities, Unrealized Losses	(2)		(2)		(3)
Total cash and marketable securities	1,192		1,192		1,217
Available-for-sale Securities, Activity [Abstract]
Proceeds from sales and maturities	417	171	676	398
Gross realized gains	1	1	2	2
Gross realized losses	(1)	$ 0	(2)	$ (1)
U.S. government and agency securities [Member]
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	179		179		166
Marketable securities, Unrealized Gains	0		0		0
Marketable securities, Unrealized Losses	0		0		0
Marketable securities, Fair Value	179		179		166
Foreign government bonds [Member]
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	31		31		25
Marketable securities, Unrealized Gains	0		0		0
Marketable securities, Unrealized Losses	0		0		0
Marketable securities, Fair Value	31		31		25
Asset-backed securities [Member]
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	131		131		130
Marketable securities, Unrealized Gains	0		0		0
Marketable securities, Unrealized Losses	0		0		0
Marketable securities, Fair Value	131		131		130
Mortgage-backed securities [Member]
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	120		120		127
Marketable securities, Unrealized Gains	1		1		0
Marketable securities, Unrealized Losses	(1)		(1)		(1)
Marketable securities, Fair Value	120		120		126
Corporate notes and bonds [Member]
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	662		662		644
Marketable securities, Unrealized Gains	3		3		3
Marketable securities, Unrealized Losses	(1)		(1)		(2)
Marketable securities, Fair Value	664		664		645
Municipal securities [Member]
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	22		22		18
Marketable securities, Unrealized Gains	0		0		0
Marketable securities, Unrealized Losses	0		0		0
Marketable securities, Fair Value	$ 22		$ 22		$ 18