FINANCIAL INSTRUMENTS (Summary of Fair Value of Financial Instruments) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Cash Equivalents, at Carrying Value	$ 1,421		$ 2,280
Cash Equivalents, Accumulated Gross Unrealized Gain, Before Tax	1		0
Cash Equivalents, Accumulated Gross Unrealized Loss, Before Tax	0		0
Cash Equivalents, Fair Value	1,422		2,280
Marketable Securities, Amortized Cost Basis, Current	11		4
Marketable Securities, Accumulated Gross Unrealized Gain, Current, before Tax	0		0
Marketable Securities, Accumulated Gross Unrealized Loss, Current, before Tax	0		0
Marketable Securities, Debt Securities, Current	11		4
Available-for-sale Debt Securities, Amortized Cost Basis	1,537		1,341
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	34		45
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	36		14
Available-for-sale Securities, Debt Securities	1,535		1,372
Equity Securities, Amortized Cost Basis	148		164
Equity Securities, Accumulated Gross Unrealized Gain, Before Tax	20		2
Equity Securities, Accumulated Gross Unrealized Loss, Before Tax	17		26
Equity Securities, Fair Value	151		140
Other Investments, at Cost	1,685		1,505
Other Investments and Securities, Accumulated Gross Unrealized Gain, Before Tax	54		47
Other Investments and Securities, Accumulated Gross Unrealized Loss, Before Tax	53		40
Other Investments	1,686		1,512
Cash Equivalents, Marketable Securities and Other Investments, Amortized Cost Basis	3,117		3,789
Cash Equivalents, Marketable Securities and Other Investments, Accumulated Gross Unrealized Gain, Before Tax	55		47
Cash Equivalents, Marketable Securities and Other Investments, Accumulated Gross Unrealized Loss, Before Tax	53		40
Cash Equivalents, Marketable Securities and Other Investments, Fair Value	3,119		3,796
Long-term Debt	20,516		20,517
Long Term Debt, Accumulated Gross Unrealized Gain, Before Tax	32		6
Long Term Debt, Accumulated Gross Unrealized Loss, Before Tax	1,607		2,104
Long-term Debt, Fair Value	22,091		22,615
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	118		152
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	(320)		(372)
Derivative Assets (Liabilities), at Fair Value, Net	(202)		(220)
Long Term Debt, Accumulated Fair Value Adjustment	18		19
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	22
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	24
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	421
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	423
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	776
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	763
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	318
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	325
Proceeds from sales of available-for-sale securities	348	$ 69
Gross realized gains	7	1
Gross realized losses	9	$ 0
Equity Securities, Net Unrealized Gain	9
Cost Method Investments	58
US Treasury and Government [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	551		637
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	8		13
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	17		11
Available-for-sale Securities, Debt Securities	542		639
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	986		704
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	26		32
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	19		3
Available-for-sale Securities, Debt Securities	993		733
Interest Rate Contract [Member]
Schedule of Available-for-sale Securities [Line Items]
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	0		0
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	(3)		(4)
Derivative Assets (Liabilities), at Fair Value, Net	(3)		(4)
Commodity Contract [Member]
Schedule of Available-for-sale Securities [Line Items]
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	97		130
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	(246)		(256)
Derivative Assets (Liabilities), at Fair Value, Net	(149)		(126)
Foreign Exchange Contract [Member]
Schedule of Available-for-sale Securities [Line Items]
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	21		22
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	(71)		(112)
Derivative Assets (Liabilities), at Fair Value, Net	(50)		(90)
Cash Equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity Securities	748		1,771
Money Market Funds, at Carrying Value	671		509
Investments	$ 2		$ 0