FINANCIAL INSTRUMENTS (Fair Value of Financial Instruments) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Financial Instruments [Line Items]
Fair Value Adjustments	$ 22		$ 22
Long-term Debt [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	(17,287)	[1]	(17,517)	[1]
Financial Instruments, Gross Unrealized Gain	170		296
Financial Instruments, Gross Unrealized Loss	(2,232)		(2,246)
Financial Instruments, Fair Value	(19,349)		(19,467)
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	(6)		(5)
Financial Instruments, Fair Value	(6)		(5)
Commodity Contract [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	0		0
Financial Instruments, Gross Unrealized Gain	13		11
Financial Instruments, Gross Unrealized Loss	(5)	[2]	(2)	[2]
Financial Instruments, Fair Value	8	[2]	9	[2]
Foreign Currency Contract [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	0		0
Financial Instruments, Gross Unrealized Gain	13		45
Financial Instruments, Gross Unrealized Loss	(29)		(13)
Financial Instruments, Fair Value	(16)		32
Marketable Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	1,850	[3]	1,808	[3]
Financial Instruments, Gross Unrealized Gain	244	[3]	267	[3]
Financial Instruments, Gross Unrealized Loss	(14)	[3]	(19)	[3]
Financial Instruments, Fair Value	2,080	[3]	2,056	[3]
Debt Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	1,189	[3]	1,203	[3]
Financial Instruments, Gross Unrealized Gain	75	[3]	71	[3]
Financial Instruments, Gross Unrealized Loss	(7)	[3]	(15)	[3]
Financial Instruments, Fair Value	1,257	[3]	1,259	[3]
Equity Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	661	[3]	605	[3]
Financial Instruments, Gross Unrealized Gain	169	[3]	196	[3]
Financial Instruments, Gross Unrealized Loss	(7)	[3]	(4)	[3]
Financial Instruments, Fair Value	823	[3]	797	[3]
Corporate Bond Securities [Member] | Debt Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	655	[3]	659	[3]
Financial Instruments, Gross Unrealized Gain	46	[3]	43	[3]
Financial Instruments, Gross Unrealized Loss	(3)	[3]	(7)	[3]
Financial Instruments, Fair Value	698	[3]	695	[3]
Us Treasury and Us Government Obligations [Member] | Debt Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	534	[3],[4]	544	[3],[4]
Financial Instruments, Gross Unrealized Gain	29	[3],[4]	28	[3],[4]
Financial Instruments, Gross Unrealized Loss	(4)	[3],[4]	(8)	[3],[4]
Financial Instruments, Fair Value	$ 559	[3],[4]	$ 564	[3],[4]

[1] The cost basis includes fair value hedge adjustments of $22 million at March 31, 2014 and $22 million at December 31, 2013.

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

[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.