FINANCIAL INSTRUMENTS FINANCIAL INSTRUMENTS Summary of Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis, Current	$ 4	$ 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, Current, before Tax	0	0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, Current, before Tax	0	0
Available-for-sale Securities, Debt Securities, Current	4	0
Available-for-sale Debt Securities, Amortized Cost Basis	1,341	1,230
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	45	40
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	(14)	(17)
Available-for-sale Securities, Debt Securities	1,372	1,253
Available-for-sale Securities, Amortized Cost Basis	1,509	1,888
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	47	138
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(40)	(67)
Available-for-sale Securities	1,516	1,959
Long-term Debt	(20,517)	(21,091)
Long Term Debt, Accumulated Gross Unrealized Gain, Before Tax	6	129
Long Term Debt, Accumulated Gross Unrealized Loss, Before Tax	(2,104)	(1,845)
Long-term debt 6	(22,615)	(22,807)
Long Term Debt, Accumulated Fair Value Adjustment	19	18
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	(4)	(5)
Derivative Assets (Liabilities), at Fair Value, Net	(4)	(5)
Commodity Contract [Member]
Schedule of Available-for-sale Securities [Line Items]
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	130	56
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	(256)	(213)
Derivative Assets (Liabilities), at Fair Value, Net	(126)	(157)
Foreign Exchange Contract [Member]
Schedule of Available-for-sale Securities [Line Items]
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	22	84
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	(112)	(30)
Derivative Assets (Liabilities), at Fair Value, Net	(90)	54
US Treasury and Government [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	637	607
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	13	13
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	(11)	(12)
Available-for-sale Securities, Debt Securities	639	608
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	704	623
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax	32	27
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	(3)	(5)
Available-for-sale Securities, Debt Securities	733	645
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Equity Securities, Amortized Cost Basis	164	658
Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax	2	98
Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax	(26)	(50)
Equity securities 3	$ 140	$ 706