CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES - MATURITIES (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Cost Basis [Abstract]
Due in one year or less	$ 152
Due after one year through five years	1,099
Due after five years through 10 years	3
Due after 10 years			0
Marketable securities, Cost Basis	1,254	1,110
Fair Value [Abstract]
Due in one year or less	151
Due after one year through five years	1,106
Due after five years through 10 years	4
Due after 10 years			0
Marketable securities, Fair Value	$ 1,261	$ 1,110