CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Cash and Cash Equivalents [Abstract]
Cash	$ 3		$ 3		$ 4
Cash equivalents	85		85		103
Cash and cash equivalents	88	$ 34	88	$ 34	107	$ 80
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	1,167		1,167		1,110
Marketable securities, Unrealized Gains	6		6		3
Marketable securities, Unrealized Losses	(3)		(3)		(3)
Marketable securities, Fair Value	1,170		1,170		1,110
Cash and marketables securities, Cost Basis	1,255		1,255		1,217
Cash and marketable securities, Unrealized Gains	6		6		3
Cash and marketable securities, Unrealized Losses	(3)		(3)		(3)
Total cash and marketable securities	1,258		1,258		1,217
Available-for-sale Securities, Activity [Abstract]
Proceeds from sales and maturities	142	341	818	739
Gross realized gains	0	1	2	3
Gross realized losses	0	$ 0	(2)	$ (1)
U.S. government and agency securities [Member]
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	188		188		166
Marketable securities, Unrealized Gains	1		1		0
Marketable securities, Unrealized Losses	0		0		0
Marketable securities, Fair Value	189		189		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	137		137		130
Marketable securities, Unrealized Gains	0		0		0
Marketable securities, Unrealized Losses	0		0		0
Marketable securities, Fair Value	137		137		130
Mortgage-backed securities [Member]
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	107		107		127
Marketable securities, Unrealized Gains	0		0		0
Marketable securities, Unrealized Losses	0		0		(1)
Marketable securities, Fair Value	107		107		126
Corporate notes and bonds [Member]
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	682		682		644
Marketable securities, Unrealized Gains	5		5		3
Marketable securities, Unrealized Losses	(3)		(3)		(2)
Marketable securities, Fair Value	684		684		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