CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Cash and Cash Equivalents [Abstract]
Cash	$ 0		$ 0		$ 4
Money market funds and other securities	81		81		69
Cash and cash equivalents	81	$ 45	81	$ 45	73	$ 107
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	1,513		1,513		1,260
Marketable securities, Unrealized Gains	14		14		1
Marketable securities, Unrealized Losses	(1)		(1)		(6)
Marketable securities, Fair Value	1,526		1,526		1,255
Cash and marketables securities, Cost Basis	1,594		1,594		1,333
Cash and marketable securities, Unrealized Gains	14		14		1
Cash and marketable securities, Unrealized Losses	(1)		(1)		(6)
Total cash and marketable securities	1,607		1,607		1,328
Available-for-sale Securities, Activity [Abstract]
Proceeds from sales and maturities	217	417	357	676
Gross realized gains	2	1	2	2
Gross realized losses	(1)	$ (1)	(1)	$ (2)
U.S. government and agency securities [Member]
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	430		430		254
Marketable securities, Unrealized Gains	3		3		0
Marketable securities, Unrealized Losses	0		0		(1)
Marketable securities, Fair Value	433		433		253
Foreign government bonds [Member]
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	32		32		31
Marketable securities, Unrealized Gains	0		0		0
Marketable securities, Unrealized Losses	0		0		0
Marketable securities, Fair Value	32		32		31
Asset-backed securities [Member]
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	160		160		130
Marketable securities, Unrealized Gains	1		1		0
Marketable securities, Unrealized Losses	0		0		0
Marketable securities, Fair Value	161		161		130
Mortgage-backed securities [Member]
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	112		112		117
Marketable securities, Unrealized Gains	1		1		0
Marketable securities, Unrealized Losses	0		0		(1)
Marketable securities, Fair Value	113		113		116
Corporate notes and bonds [Member]
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	762		762		711
Marketable securities, Unrealized Gains	9		9		1
Marketable securities, Unrealized Losses	(1)		(1)		(4)
Marketable securities, Fair Value	770		770		708
Municipal securities [Member]
Available-for-sale Securities, Current [Abstract]
Marketable securities, Cost Basis	17		17		17
Marketable securities, Unrealized Gains	0		0		0
Marketable securities, Unrealized Losses	0		0		0
Marketable securities, Fair Value	$ 17		$ 17		$ 17