FINANCIAL INSTRUMENTS (Fair Value of Financial Instruments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Dec. 31, 2012
Financial Instruments [Line Items]
Trading Securities, Change in Unrealized Holding Gain (Loss)	$ (1)		$ 1	$ (11)		$ 3
Fair Value Adjustments	22			22			23
Long-term Debt [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	(18,167)	[1]		(18,167)	[1]		(20,591)	[1]
Financial Instruments, Gross Unrealized Gain	257	[1]		257	[1]		24	[1]
Financial Instruments, Gross Unrealized Loss	(2,113)	[1]		(2,113)	[1]		(3,195)	[1]
Financial Instruments, Fair Value	(20,023)	[1]		(20,023)	[1]		(23,762)	[1]
Interest Rate Contract [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	0			0			0
Financial Instruments, Gross Unrealized Gain	1			1			1
Financial Instruments, Gross Unrealized Loss	(4)			(4)			(6)
Financial Instruments, Fair Value	(3)			(3)			(5)
Commodity Contract [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	0	[2]		0	[2]		0	[2]
Financial Instruments, Gross Unrealized Gain	13	[2]		13	[2]		26	[2]
Financial Instruments, Gross Unrealized Loss	(11)	[2]		(11)	[2]		(7)	[2]
Financial Instruments, Fair Value	2	[2]		2	[2]		19	[2]
Foreign Currency Contract [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	0			0			0
Financial Instruments, Gross Unrealized Gain	67			67			34
Financial Instruments, Gross Unrealized Loss	(27)			(27)			(20)
Financial Instruments, Fair Value	40			40			14
Marketable Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	1,789	[3]		1,789	[3]		1,816	[3]
Financial Instruments, Gross Unrealized Gain	234	[3]		234	[3]		249	[3]
Financial Instruments, Gross Unrealized Loss	(19)	[3]		(19)	[3]		(4)	[3]
Financial Instruments, Fair Value	2,004	[3]		2,004	[3]		2,061	[3]
Debt Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	1,197	[3]		1,197	[3]		1,182	[3]
Financial Instruments, Gross Unrealized Gain	81	[3]		81	[3]		140	[3]
Financial Instruments, Gross Unrealized Loss	(11)	[3]		(11)	[3]		(1)	[3]
Financial Instruments, Fair Value	1,267	[3]		1,267	[3]		1,321	[3]
Corporate Bond Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	665	[3]		665	[3]		676	[3]
Financial Instruments, Gross Unrealized Gain	47	[3]		47	[3]		81	[3]
Financial Instruments, Gross Unrealized Loss	(6)	[3]		(6)	[3]		(1)	[3]
Financial Instruments, Fair Value	706	[3]		706	[3]		756	[3]
Government Bonds [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	532	[3],[4]		532	[3],[4]		506	[3],[4]
Financial Instruments, Gross Unrealized Gain	34	[3],[4]		34	[3],[4]		59	[3],[4]
Financial Instruments, Gross Unrealized Loss	(5)	[3],[4]		(5)	[3],[4]		0	[3],[4]
Financial Instruments, Fair Value	561	[3],[4]		561	[3],[4]		565	[3],[4]
Equity Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	592	[3]		592	[3]		634	[3]
Financial Instruments, Gross Unrealized Gain	153	[3]		153	[3]		109	[3]
Financial Instruments, Gross Unrealized Loss	(8)	[3]		(8)	[3]		(3)	[3]
Financial Instruments, Fair Value	$ 737	[3]		$ 737	[3]		$ 740	[3]

[1] (3)Cost includes fair value adjustments of $22 million at September 30, 2013 and $23 million at December 31, 2012.

[2] (4)Presented net of cash collateral, as disclosed in Note 7.

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

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