NONCONSOLIDATED AFFILIATES (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Investment in nonconsolidated affiliates	$ 1,910		$ 1,327
Equity Method Investment, Liability, Noncurrent	0		169
Equity Method Investment, Net of Investment Liabilities	1,910		1,158
Proceeds from Equity Method Investment, Distribution	232	$ 391
EQUATE Petrochemical Company Ksc [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Liability, Noncurrent	18		147
Sadara Chemical Company [Member]
Schedule of Equity Method Investments [Line Items]
Investment in nonconsolidated affiliates	$ 412
Equity Method Investment, Liability, Noncurrent			$ 22