NONCONSOLIDATED AFFILIATES (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Investment in nonconsolidated affiliates	$ 1,754		$ 1,327
Equity Method Investment, Liability, Noncurrent	60		169
Equity Method Investment, Net of Investment Liabilities	1,694		1,158
Proceeds from Equity Method Investment, Distribution	219	$ 380
Other	2,650		2,551
EQUATE Petrochemical Company Ksc and The Kuwait Olefins Company K.S.C.C. [Member]
Schedule of Equity Method Investments [Line Items]
Other		$ 109
EQUATE Petrochemical Company Ksc [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Liability, Noncurrent	60		147
Sadara Chemical Company [Member]
Schedule of Equity Method Investments [Line Items]
Investment in nonconsolidated affiliates	$ 350
Equity Method Investment, Liability, Noncurrent			$ 22