FINANCIAL INSTRUMENTS (Fair Value of Financial Instruments) (Details) (USD $) In Millions	Sep. 30, 2011		Dec. 31, 2010
Financial Instruments [Line Items]
Fair Value Adjustments	$ 22		$ 23
Equity Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	652	[1]	501	[1]
Financial Instruments, Gross Unrealized Gain	32	[1]	94	[1]
Financial Instruments, Gross Unrealized Loss	(70)	[1]	(3)	[1]
Financial Instruments, Fair Value	614	[1]	592	[1]
Marketable Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	1,850	[1]	1,864	[1]
Financial Instruments, Gross Unrealized Gain	165	[1]	206	[1]
Financial Instruments, Gross Unrealized Loss	(73)	[1]	(6)	[1]
Financial Instruments, Fair Value	1,942	[1]	2,064	[1]
Fixed Income Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	1,198	[1]	1,363	[1]
Financial Instruments, Gross Unrealized Gain	133	[1]	112	[1]
Financial Instruments, Gross Unrealized Loss	(3)	[1]	(3)	[1]
Financial Instruments, Fair Value	1,328	[1]	1,472	[1]
Fixed Income Securities [Member] | Government Bonds [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	543	[1],[2]	603	[1],[2]
Financial Instruments, Gross Unrealized Gain	63	[1],[2]	40	[1],[2]
Financial Instruments, Gross Unrealized Loss	0	[1],[2]	(2)	[1],[2]
Financial Instruments, Fair Value	606	[1],[2]	641	[1],[2]
Fixed Income Securities [Member] | Corporate Bond Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	655	[1]	760	[1]
Financial Instruments, Gross Unrealized Gain	70	[1]	72	[1]
Financial Instruments, Gross Unrealized Loss	(3)	[1]	(1)	[1]
Financial Instruments, Fair Value	722	[1]	831	[1]
Foreign Currency Contract [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	0		0
Financial Instruments, Gross Unrealized Gain	93		40
Financial Instruments, Gross Unrealized Loss	(108)		(38)
Financial Instruments, Fair Value	(15)		2
Commodity Contract [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	0		0
Financial Instruments, Gross Unrealized Gain	14		14
Financial Instruments, Gross Unrealized Loss	(3)		(4)
Financial Instruments, Fair Value	11		10
Long-term Debt [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	(18,716)	[3]	(22,360)	[3]
Financial Instruments, Gross Unrealized Gain	88	[3]	175	[3]
Financial Instruments, Gross Unrealized Loss	(2,360)	[3]	(2,530)	[3]
Financial Instruments, Fair Value	$ (20,988)	[3]	$ (24,715)	[3]

[1] Included in “Other investments” in the consolidated balance sheets.

[2] U.S. Treasury obligations, U.S. agency obligations, agency mortgage-backed securities and other municipalities’ obligations

[3] Cost includes fair value adjustments of $22 million at September 30, 2011 and $23 million at December 31, 2010.