COMMITMENTS AND CONTINGENT LIABILITIES Indemnifications with Corning (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019	Jun. 01, 2016
Other noncurrent assets
Loss Contingencies [Line Items]
Indemnification Asset	$ 32	$ 52
Other Current Assets [Member]
Loss Contingencies [Line Items]
Indemnification Asset	48	58
Dow Silicones Corporation [Member]
Loss Contingencies [Line Items]
Business Combination, Indemnification Assets, Percentage of Future Losses			50.00%
Indemnification Asset	100	100
Dow Silicones Corporation [Member] | Other Current Assets [Member] | Commercial Creditors Litigation [Member]
Loss Contingencies [Line Items]
Indemnification Asset	37	37
Environmental Issue [Member] | Dow Silicones Corporation [Member] | Other noncurrent assets
Loss Contingencies [Line Items]
Indemnification Asset	$ 63	$ 63