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FINANCIAL INSTRUMENTS (Derivative) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 3,657	$ 2,020
Restricted Cash and Cash Equivalents, Current	97	100
Restricted Cash and Cash Equivalents, Noncurrent	149	158
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	3,903	2,278	$ 4,455	$ 4,710
Credit Derivative, Maximum Exposure, Undiscounted	186
Bank Time Deposits [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 300	$ 1,300