CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES - MATURITIES (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Cost Basis [Abstract]
Due in one year or less	$ 250
Due after one year through five years	904
Due after five years through 10 years	7
Marketable securities, Cost Basis	1,161	1,119
Fair Value [Abstract]
Due in one year or less	250
Due after one year through five years	913
Due after five years through 10 years	7
Marketable securities, Fair Value	$ 1,170	$ 1,130