FINANCIAL INSTRUMENTS (Summary of Fair Value of Financial Instruments) (Details) - USD ($) $ in Millions		Sep. 30, 2020		Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Cash Equivalents, Cost		$ 2,534		$ 417
Cash Equivalents, Fair Value		2,534		417
Restricted Cash, Cost		6,232	[1]	37
Restricted Cash, Fair Value		6,232	[1]	37
Cash and Restricted Cash Equivalents, Marketable Securities and Other Investments, Cost		8,766		454
Cash and Restricted Cash Equivalents, Marketable Securities and Other Investments, Fair Value		8,766		454
Long-term debt including debt due within one year, Cost		(23,806)		(15,618)
Long Term Debt including debt due within one year, Gain		2
Long Term Debt including debt due within one year, Loss		(2,375)		(1,633)
Long Term Debt, Including Debt Due within one year, Fair Value		(26,179)		(17,251)
Derivative Assets (Liabilities), Gain		4		6
Derivative Assets (Liabilities), Loss		(6)		(7)
Derivative Assets (Liabilities), Fair Value		(2)		(1)
Foreign Exchange Contract
Debt Securities, Available-for-sale [Line Items]
Derivative Assets (Liabilities), Gain	[2]	4		6
Derivative Assets (Liabilities), Loss	[2]	(6)		(7)
Derivative Assets (Liabilities), Fair Value	[2]	$ (2)		$ (1)

[1] Includes $26 million of restricted cash classified as "Other current assets" and $6.2 billion classified as "Restricted cash" in the interim Condensed Consolidated Balance Sheets. Refer to Note 6 for further information.

[2] Presented net of cash collateral where master netting arrangements allow.