FINANCIAL INSTRUMENTS (Marketable Securities) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended																				12 Months Ended						12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012 Current Marketable Securities [Member]	Dec. 31, 2011 Current Marketable Securities [Member]	Dec. 31, 2012 Noncurrent Marketable Securities [Member]	Dec. 31, 2011 Noncurrent Marketable Securities [Member]	Dec. 31, 2012 Certificates of Deposit [Member]	Dec. 31, 2011 Certificates of Deposit [Member]	Dec. 31, 2012 Corporate Debt Securities [Member]	Dec. 31, 2011 Corporate Debt Securities [Member]	Dec. 31, 2011 Commercial Paper [Member]	Dec. 31, 2012 U.S. Treasury Bills [Member]	Dec. 31, 2011 U.S. Treasury Bills [Member]	Dec. 31, 2011 Federal Deposit Insurance Corporation Insured Debt Securities [Member]	Dec. 31, 2012 Equity Funds [Member]	Dec. 31, 2012 Fixed Income Funds [Member]	Dec. 31, 2012 Auction Rate Securities [Member]	Dec. 31, 2011 Auction Rate Securities [Member]	Dec. 31, 2012 Floating Rate Securities [Member]	Dec. 31, 2011 Floating Rate Securities [Member]	Dec. 31, 2012 Auction Rate Securities And Floating Rate Securities [Member]	Dec. 31, 2012 Fair Value Level 1 [Member]	Dec. 31, 2011 Fair Value Level 1 [Member]	Dec. 31, 2012 Fair Value Level 1 [Member] U.S. Treasury Bills [Member]	Dec. 31, 2011 Fair Value Level 1 [Member] U.S. Treasury Bills [Member]	Dec. 31, 2012 Fair Value Level 2 [Member]	Dec. 31, 2011 Fair Value Level 2 [Member]	Dec. 31, 2012 Fair Value Level 2 [Member] Certificates of Deposit [Member]	Dec. 31, 2011 Fair Value Level 2 [Member] Certificates of Deposit [Member]	Dec. 31, 2012 Fair Value Level 2 [Member] Corporate Debt Securities [Member]	Dec. 31, 2011 Fair Value Level 2 [Member] Corporate Debt Securities [Member]	Dec. 31, 2011 Fair Value Level 2 [Member] Commercial Paper [Member]	Dec. 31, 2011 Fair Value Level 2 [Member] Federal Deposit Insurance Corporation Insured Debt Securities [Member]	Dec. 31, 2012 Fair Value Level 2 [Member] Equity Funds [Member]	Dec. 31, 2012 Fair Value Level 2 [Member] Fixed Income Funds [Member]	Dec. 31, 2012 Fair Value Level 3 [Member]	Dec. 31, 2011 Fair Value Level 3 [Member]	Dec. 31, 2012 Fair Value Level 3 [Member] Auction Rate Securities [Member]	Dec. 31, 2011 Fair Value Level 3 [Member] Auction Rate Securities [Member]	Dec. 31, 2012 Fair Value Level 3 [Member] Floating Rate Securities [Member]	Dec. 31, 2011 Fair Value Level 3 [Member] Floating Rate Securities [Member]	Dec. 31, 2010 Fair Value Level 3 [Member] Auction Rate Securities And Floating Rate Securities [Member]
Marketable Securities [Line Items]
Marketable Securities, Amortized Cost	$ 4,617	$ 5,797											$ 34	$ 1,051	$ 4,305	$ 2,908	$ 1,035	$ 150	$ 400	$ 302	$ 52	$ 47	$ 8	$ 80	$ 21	$ 21
Marketable Securities, Unrealized Gain in Accumulated OCI	75	75													72	60			2	1			3	12
Marketable Securities, Unrealized Loss in Accumulated OCI	(1)	(6)														(3)									(1)	(3)
Gain/(Loss) in Income	5																				5
Marketable Securities, Fair Value	4,696	5,866	5,125	5,968	6,307	6,541	6,739	6,453	1,173	2,957	3,523	2,909	34	1,051	4,377	2,965	1,035	150	402	303	57	47	11	92	20	18		150	402	150	402	4,515	5,354	34	1,051	4,377	2,965	1,035	303	57	47	31	110	11	92	20	18
Available For Sale Securities Maturities After One Through Five Years, Fair Value											3,512
Available For Sale Securities Maturities After Ten Years, Fair Value																							11
Cash Equivalents, Fair Value	1,288	5,469
Cash and cash equivalents maintained in foreign currencies	493
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at January 1	566	598																									110																					110
Sales	(25)	(39)																									(81)
Unrealized gains/(losses)	(49)	(66)																									2
Fair value at December 31	$ 536	$ 566																									$ 31																					$ 110