FINANCIAL INSTRUMENTS (Summary of Fair Value of Financial Instruments) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Cash Equivalents, at Carrying Value	$ 1,775	$ 1,775		$ 2,280
Cash Equivalents, Accumulated Gross Unrealized Gain, Before Tax	0	0		0
Cash Equivalents, Accumulated Gross Unrealized Loss, Before Tax	0	0		0
Cash Equivalents, Fair Value	1,775	1,775		2,280
Available-for-sale Debt Securities, Amortized Cost Basis, Current	131	131		4
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, Current, before Tax	2	2		0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, Current, before Tax	0	0		0
Available-for-sale Securities, Debt Securities, Current	133	133		4
Available-for-sale Debt Securities, Amortized Cost Basis	1,591	1,591		1,341
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	30	30		45
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	52	52		14
Available-for-sale Securities, Debt Securities	1,569	1,569		1,372
Equity Securities, Amortized Cost Basis	143	143		164
Equity Securities, Accumulated Gross Unrealized Gain, Before Tax	20	20		2
Equity Securities, Accumulated Gross Unrealized Loss, Before Tax	12	12		26
Equity Securities, Fair Value	151	151		140
Other Investments and Securities, at Cost	1,734	1,734		1,505
Other Investments and Securities, Accumulated Gross Unrealized Gain, Before Tax	50	50		47
Other Investments and Securities, Accumulated Gross Unrealized Loss, Before Tax	64	64		40
Other Investments	1,720	1,720		1,512
Cash Equivalents, Marketable Securities and Other Investments, Amortized Cost Basis	3,640	3,640		3,789
Cash Equivalents, Marketable Securities and Other Investments, Accumulated Gross Unrealized Gain, Before Tax	52	52		47
Cash Equivalents, Marketable Securities and Other Investments, Accumulated Gross Unrealized Loss, Before Tax	64	64		40
Cash Equivalents, Marketable Securities and Other Investments, Fair Value	3,628	3,628		3,796
Long-term Debt	19,959	19,959		20,517
Long Term Debt, Accumulated Gross Unrealized Gain, Before Tax	153	153		6
Long Term Debt, Accumulated Gross Unrealized Loss, Before Tax	1,309	1,309		2,104
Long-term Debt, Fair Value	21,115	21,115		22,615
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	342	342		152
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	286	286		372
Derivative Assets (Liabilities), at Fair Value, Net	56	56		(220)
Long Term Debt, Accumulated Fair Value Adjustment	18	18		19
Proceeds from sales of available-for-sale securities		625	$ 132
Gross realized gains		15	3
Gross realized losses		18	$ 0
Equity Securities, Net Unrealized Gain (Loss)	(1)	8
Cost Method Investments	56	56
US Treasury and Government [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	678	678		637
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	8	8		13
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	24	24		11
Available-for-sale Securities, Debt Securities	662	662		639
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	913	913		704
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	22	22		32
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	28	28		3
Available-for-sale Securities, Debt Securities	907	907		733
Interest Rate Contract [Member]
Schedule of Available-for-sale Securities [Line Items]
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	0	0		0
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	39	39		4
Derivative Assets (Liabilities), at Fair Value, Net	(39)	(39)		(4)
Commodity Contract [Member]
Schedule of Available-for-sale Securities [Line Items]
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	159	159		130
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	212	212		256
Derivative Assets (Liabilities), at Fair Value, Net	(53)	(53)		(126)
Foreign Exchange Contract [Member]
Schedule of Available-for-sale Securities [Line Items]
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	183	183		22
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	35	35		112
Derivative Assets (Liabilities), at Fair Value, Net	148	148		$ (90)
Long-term Debt [Member]
Schedule of Available-for-sale Securities [Line Items]
Derivative, Notional Amount	$ 2,990	$ 2,990