FINANCIAL INSTRUMENTS (Fair Value of Financial Instruments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Financial Instruments [Line Items]
Fair Value Adjustments	$ (23)		$ (23)
Long-term Debt [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	(21,059)	[1]	(22,360)	[1]
Financial Instruments, Gross Unrealized Gain	6	[1]	175	[1]
Financial Instruments, Gross Unrealized Loss	(2,736)	[1]	(2,530)	[1]
Financial Instruments, Fair Value	(23,789)	[1]	(24,715)	[1]
Foreign Currency Contract [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	0		0
Financial Instruments, Gross Unrealized Gain	31		40
Financial Instruments, Gross Unrealized Loss	(17)		(38)
Financial Instruments, Fair Value	14		2
Commodity Contract [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	0		0
Financial Instruments, Gross Unrealized Gain	16		14
Financial Instruments, Gross Unrealized Loss	(1)		(4)
Financial Instruments, Fair Value	15		10
Equity Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	646	[2]	501	[2]
Financial Instruments, Gross Unrealized Gain	57	[2]	94	[2]
Financial Instruments, Gross Unrealized Loss	(36)	[2]	(3)	[2]
Financial Instruments, Fair Value	667	[2]	592	[2]
Marketable Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	1,854	[2]	1,864	[2]
Financial Instruments, Gross Unrealized Gain	192	[2]	206	[2]
Financial Instruments, Gross Unrealized Loss	(38)	[2]	(6)	[2]
Financial Instruments, Fair Value	2,008	[2]	2,064	[2]
Fixed Income Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	1,208	[2]	1,363	[2]
Financial Instruments, Gross Unrealized Gain	135	[2]	112	[2]
Financial Instruments, Gross Unrealized Loss	(2)	[2]	(3)	[2]
Financial Instruments, Fair Value	1,341	[2]	1,472	[2]
Fixed Income Securities [Member] | Government Bonds [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	556	[2],[3]	603	[2],[3]
Financial Instruments, Gross Unrealized Gain	62	[2],[3]	40	[2],[3]
Financial Instruments, Gross Unrealized Loss	0	[2],[3]	(2)	[2],[3]
Financial Instruments, Fair Value	618	[2],[3]	641	[2],[3]
Fixed Income Securities [Member] | Corporate Bond Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	652	[2]	760	[2]
Financial Instruments, Gross Unrealized Gain	73	[2]	72	[2]
Financial Instruments, Gross Unrealized Loss	(2)	[2]	(1)	[2]
Financial Instruments, Fair Value	$ 723	[2]	$ 831	[2]

[1] Cost includes reductions of $23 million at December 31, 2011 and $23 million at December 31, 2010 related to fair value adjustments.

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

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