FINANCIAL INSTRUMENTS (Fair Value of Financial Instruments) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Financial Instruments [Line Items]
Fair Value Adjustments	$ 23		$ 23
Long-term Debt [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	(19,963)	[1]	(21,059)	[1]
Financial Instruments, Gross Unrealized Gain	29	[1]	6	[1]
Financial Instruments, Gross Unrealized Loss	(3,285)	[1]	(2,736)	[1]
Financial Instruments, Fair Value	(23,219)	[1]	(23,789)	[1]
Foreign Currency Contract [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	0		0
Financial Instruments, Gross Unrealized Gain	23		31
Financial Instruments, Gross Unrealized Loss	(49)		(17)
Financial Instruments, Fair Value	(26)		14
Commodity Contract [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	0	[2]	0	[2]
Financial Instruments, Gross Unrealized Gain	34	[2]	16	[2]
Financial Instruments, Gross Unrealized Loss	(2)	[2]	(1)	[2]
Financial Instruments, Fair Value	32	[2]	15	[2]
Interest Rate Contract [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	0		0
Financial Instruments, Gross Unrealized Gain	0		0
Financial Instruments, Gross Unrealized Loss	(7)		0
Financial Instruments, Fair Value	(7)		0
Equity Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	623	[3]	646	[3]
Financial Instruments, Gross Unrealized Gain	103	[3]	57	[3]
Financial Instruments, Gross Unrealized Loss	(11)	[3]	(36)	[3]
Financial Instruments, Fair Value	715	[3]	667	[3]
Marketable Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	1,826	[3]	1,854	[3]
Financial Instruments, Gross Unrealized Gain	254	[3]	192	[3]
Financial Instruments, Gross Unrealized Loss	(12)	[3]	(38)	[3]
Financial Instruments, Fair Value	2,068	[3]	2,008	[3]
Fixed Income Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	1,203	[3]	1,208	[3]
Financial Instruments, Gross Unrealized Gain	151	[3]	135	[3]
Financial Instruments, Gross Unrealized Loss	(1)	[3]	(2)	[3]
Financial Instruments, Fair Value	1,353	[3]	1,341	[3]
Fixed Income Securities [Member] | Government Bonds [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	520	[3],[4]	556	[3],[4]
Financial Instruments, Gross Unrealized Gain	64	[3],[4]	62	[3],[4]
Financial Instruments, Gross Unrealized Loss	0	[3],[4]	0	[3],[4]
Financial Instruments, Fair Value	584	[3],[4]	618	[3],[4]
Fixed Income Securities [Member] | Corporate Bond Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	683	[3]	652	[3]
Financial Instruments, Gross Unrealized Gain	87	[3]	73	[3]
Financial Instruments, Gross Unrealized Loss	(1)	[3]	(2)	[3]
Financial Instruments, Fair Value	$ 769	[3]	$ 723	[3]

[1] Cost includes fair value adjustments of $23 million at September 30, 2012 and $23 million at December 31, 2011.

[2] Presented net of cash collateral, as disclosed in Note H.

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

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