FINANCIAL INSTRUMENTS Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Investment [Line Items]
Cash Equivalents, at Carrying Value	$ 345		$ 566
Cash Equivalents, Accumulated Gross Unrealized Gain, Before Tax	0		0
Cash Equivalents, Accumulated Gross Unrealized Loss, Before Tax	0		0
Cash Equivalents, Fair Value	345		566
Available-for-sale Debt Securities, Amortized Cost Basis, Current	101		100
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
Debt Securities, Available-for-sale, Current	101		100
Debt Securities, Available-for-sale, Amortized Cost	1,745		1,740
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	60		29
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	30		86
Debt Securities, Available-for-sale	1,775		1,683
Equity Securities, Amortized Cost Basis	16		16
Equity Securities, Accumulated Gross Unrealized Gain, Before Tax	5		1
Equity Securities, Accumulated Gross Unrealized Loss, Before Tax	0		(1)
Equity Securities, Fair Value	21		16
Other Investments and Securities, at Cost	1,761		1,756
Other Investments and Securities, Accumulated Gross Unrealized Gain, Before Tax	65		30
Other Investments and Securities, Accumulated Gross Unrealized Loss, Before Tax	30		87
Other Investments	1,796		1,699
Cash Equivalents, Marketable Securities and Other Investments, Amortized Cost Basis	2,207		2,422
Cash Equivalents, Marketable Securities and Other Investments, Accumulated Gross Unrealized Gain, Before Tax	65		30
Cash Equivalents, Marketable Securities and Other Investments, Accumulated Gross Unrealized Loss, Before Tax	30		87
Cash Equivalents, Marketable Securities and Other Investments, Fair Value	2,242		2,365
Long-term Debt	19,529		19,594
Long Term Debt, Accumulated Gross Unrealized Gain, Before Tax	84		351
Long Term Debt, Accumulated Gross Unrealized Loss, Before Tax	1,405		971
Long-term Debt, Fair Value	20,850		20,214
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	174		211
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	342		285
Derivative Assets (Liabilities), at Fair Value, Net	(168)		(74)
Long Term Debt, Accumulated Fair Value Adjustment	17		18
Proceeds from sales of available-for-sale securities	159	$ 348
Gross realized gains	6	7
Gross realized losses	5	9
Cost Method Investments	207		206
Equity Securities, Net Unrealized Gain (Loss)	5	$ 9
US Treasury and Government [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	694		714
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	17		9
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	9		23
Debt Securities, Available-for-sale	702		700
Corporate Debt Securities [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	1,051		1,026
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	43		20
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	21		63
Debt Securities, Available-for-sale	1,073		983
Interest Rate Contract [Member]
Investment [Line Items]
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	0		0
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	181		64
Derivative Assets (Liabilities), at Fair Value, Net	(181)		(64)
Foreign Exchange Contract [Member]
Investment [Line Items]
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	86		120
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	14		43
Derivative Assets (Liabilities), at Fair Value, Net	72		77
Commodity Contract [Member]
Investment [Line Items]
Derivative Assets (Liabilities), Accumulated Gross Unrealized Gain, Before Tax	88		91
Derivative Assets (Liabilities), Accumulated Gross Unrealized Loss, Before Tax	147		178
Derivative Assets (Liabilities), at Fair Value, Net	(59)		(87)
Long-term debt
Investment [Line Items]
Derivative, Notional Amount	$ 2,290		$ 2,290