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FINANCIAL INSTRUMENTS (Marketable Securities) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010
Marketable Securities [Line Items]
Marketable Securities, Amortized Cost	$ 5,025	$ 5,797
Marketable Securities, Unrealized Gain in Accumulated OCI	96	75
Marketable Securities, Unrealized Loss in Accumulated OCI	(2)	(6)
Gain/(Loss) in Income	6
Marketable Securities, Fair Value	5,125	5,866
Cash Equivalents, Fair Value	1,203	5,469
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at January 1	110		110	110
Sales	(81)
Fair value at September 30	29		110	110
Current Marketable Securities [Member]
Marketable Securities [Line Items]
Marketable Securities, Fair Value	1,427	2,957
Noncurrent Marketable Securities [Member]
Marketable Securities [Line Items]
Marketable Securities, Fair Value	3,698	2,909
Certificates of Deposit [Member]
Marketable Securities [Line Items]
Marketable Securities, Amortized Cost	121	1,051
Marketable Securities, Fair Value	121	1,051
Corporate Debt Securities [Member]
Marketable Securities [Line Items]
Marketable Securities, Amortized Cost	4,337	2,908
Marketable Securities, Unrealized Gain in Accumulated OCI	94	60
Marketable Securities, Unrealized Loss in Accumulated OCI		(3)
Marketable Securities, Fair Value	4,431	2,965
Commercial Paper [Member]
Marketable Securities [Line Items]
Marketable Securities, Amortized Cost	240	1,035
Marketable Securities, Fair Value	240	1,035
US Treasury Securities [Member]
Marketable Securities [Line Items]
Marketable Securities, Amortized Cost	150	400
Marketable Securities, Unrealized Gain in Accumulated OCI	1	2
Marketable Securities, Fair Value	151	402
Federal Deposit Insurance Corporation Insured Debt Securities [Member]
Marketable Securities [Line Items]
Marketable Securities, Amortized Cost	50	302
Marketable Securities, Unrealized Gain in Accumulated OCI		1
Marketable Securities, Fair Value	50	303
Equity Funds [Member]
Marketable Securities [Line Items]
Marketable Securities, Amortized Cost	51
Gain/(Loss) in Income	5
Marketable Securities, Fair Value	56
Fixed Income Funds [Member]
Marketable Securities [Line Items]
Marketable Securities, Amortized Cost	46
Gain/(Loss) in Income	1
Marketable Securities, Fair Value	47
Auction Rate Securities [Member]
Marketable Securities [Line Items]
Marketable Securities, Amortized Cost	9	80
Marketable Securities, Unrealized Gain in Accumulated OCI	1	12
Marketable Securities, Fair Value	10	92
Floating Rate Securities [Member]
Marketable Securities [Line Items]
Marketable Securities, Amortized Cost	21	21
Marketable Securities, Unrealized Loss in Accumulated OCI	(2)	(3)
Marketable Securities, Fair Value	19	18
Corporate Debt Securities And Floating Rate Securities [Member]
Marketable Securities [Line Items]
Available For Sale Securities Maturities After One Through Five Years, Fair Value	3,688
Fair Value Level 1 [Member]
Marketable Securities [Line Items]
Marketable Securities, Fair Value	151	402
Fair Value Level 1 [Member] \| US Treasury Securities [Member]
Marketable Securities [Line Items]
Marketable Securities, Fair Value	151	402
Fair Value Level 2 [Member]
Marketable Securities [Line Items]
Marketable Securities, Fair Value	4,945	5,354
Fair Value Level 2 [Member] \| Certificates of Deposit [Member]
Marketable Securities [Line Items]
Marketable Securities, Fair Value	121	1,051
Fair Value Level 2 [Member] \| Corporate Debt Securities [Member]
Marketable Securities [Line Items]
Marketable Securities, Fair Value	4,431	2,965
Fair Value Level 2 [Member] \| Commercial Paper [Member]
Marketable Securities [Line Items]
Marketable Securities, Fair Value	240	1,035
Fair Value Level 2 [Member] \| Federal Deposit Insurance Corporation Insured Debt Securities [Member]
Marketable Securities [Line Items]
Marketable Securities, Fair Value	50	303
Fair Value Level 2 [Member] \| Equity Funds [Member]
Marketable Securities [Line Items]
Marketable Securities, Fair Value	56
Fair Value Level 2 [Member] \| Fixed Income Funds [Member]
Marketable Securities [Line Items]
Marketable Securities, Fair Value	47
Fair Value Level 3 [Member]
Marketable Securities [Line Items]
Marketable Securities, Fair Value	29	110
Fair Value Level 3 [Member] \| Auction Rate Securities [Member]
Marketable Securities [Line Items]
Marketable Securities, Fair Value	10	92
Fair Value Level 3 [Member] \| Floating Rate Securities [Member]
Marketable Securities [Line Items]
Marketable Securities, Fair Value	$ 19	$ 18