NONCONSOLIDATED AFFILIATES - (Details) $ in Millions	Sep. 30, 2020 USD ($) entity	Dec. 31, 2019 USD ($)
Investments in and Advances to Affiliates [Line Items]
Investments in nonconsolidated affiliates	$ 951	$ 1,204
Accrued and other current liabilities	(74)	(85)
Other noncurrent obligations		(358)
Net of investment in nonconsolidated affiliates	$ 877	761
Equity Method Investment Ownership Interest Number Of Affiliates | entity	18
Schedule of Equity Method Investments [Line Items]
Other noncurrent obligations		(358)
Investments in nonconsolidated affiliates	$ 951	1,204
Hemlock Semiconductor L.L.C. [Member]
Investments in and Advances to Affiliates [Line Items]
Other noncurrent obligations		(358)
Schedule of Equity Method Investments [Line Items]
Other noncurrent obligations		(358)
DC HSC Holdings LLC [Member]
Investments in and Advances to Affiliates [Line Items]
Investments in nonconsolidated affiliates		87
Schedule of Equity Method Investments [Line Items]
Investments in nonconsolidated affiliates		$ 87