NONCONSOLIDATED AFFILIATES NONCONSOLIDATED AFFILIATES - Principal Nonconsolidated Affiliates (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Investments in nonconsolidated affiliates		$ 1,212		$ 1,212		$ 1,204
Other noncurrent obligations		(270)		(270)		(358)
Revenues		4,828	$ 5,468	10,049	$ 10,882
Cost of sales		3,291	3,496	6,609	7,117
Income from continuing operations		(2,507)	(948)	(3,073)	(1,113)
Net income attributed to entities		$ (2,478)	$ (571)	(3,094)	(50)
Benefit from Contract Settlements				$ 64
DC HSC Holdings LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	[1]	50.00%		50.00%
Investments in nonconsolidated affiliates		$ 98		$ 98		87
Hemlock Semiconductor L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage		50.10%		50.10%
Other noncurrent obligations		$ (270)		$ (270)		$ (358)
DC HSC Holdings LLC [Member] | Hemlock Semiconductor L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage		80.50%		80.50%
HSC group [Member]
Schedule of Equity Method Investments [Line Items]
Revenues				$ 345	367
Cost of sales				234	229
Income from continuing operations				203	135
Net income attributed to entities				198	119
Intercompany Revenue and Cost of Sales				42	$ 55
Benefit from Contract Settlements				$ 165

[1] DC HSC Holdings LLC holds an 80.5 percent indirect ownership interest in Hemlock Semiconductor Operations LLC.