NONCONSOLIDATED AFFILIATES (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Investment in nonconsolidated affiliates	$ 1,281			$ 1,404
Equity Method Investment, Liability, Noncurrent	(305)			(80)
Equity Method Investment, Net of Investment Liabilities	976			1,324
The Kuwait Styrene Company K.S.C.C. [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Equity Method Investment, Distribution			$ 42
EQUATE Petrochemical Company Ksc [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Liability, Noncurrent	(202)			(80)
Proceeds from Equity Method Investment, Distribution		$ 157
The Kuwait Olefins Company K.S.C.C. [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Equity Method Investment, Distribution	115
Sadara Chemical Company [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Liability, Noncurrent	$ (103)			$ 0