COMMITMENTS AND CONTINGENT LIABILITES (Dow Silicones Chapter 11 Related Matters) (Details) (Details) - Dow Silicones Corporation [Member] - USD ($) $ in Millions	Jun. 01, 2004	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2017	Jun. 01, 2016
Product Liability Contingency [Line Items]
Business Combination, Indemnification Assets, Percentage of Future Losses					50.00%
Indemnification Asset			$ 0
Breast Implant and Other Products Liability Claims [Member]
Product Liability Contingency [Line Items]
Product Liability Contingency, Payments Incurred To Date		$ 1,762
Product Liability Contingency, Unexpended Balance		88
Loss Contingency Accrual, Product Liability, Net		263
Product Liability Contingency, Loss Exposure, Best Estimate		2,183
Accrued and Other Current Liabilities [Member] | Breast Implant and Other Products Liability Claims [Member]
Product Liability Contingency [Line Items]
Loss Contingency Accrual, Product Liability, Net		201	111
Other Noncurrent Obligations [Member] | Breast Implant and Other Products Liability Claims [Member]
Product Liability Contingency [Line Items]
Loss Contingency Accrual, Product Liability, Net		62	152
Commercial Creditors Litigation [Member]
Product Liability Contingency [Line Items]
Payments for Legal Settlements	$ 1,500
Estimated Litigation Liability		$ 84	$ 82
Commercial Creditors Litigation [Member] | Minimum [Member]
Product Liability Contingency [Line Items]
Loss Contingency, Estimate of Possible Loss				$ 77
Commercial Creditors Litigation [Member] | Maximum [Member]
Product Liability Contingency [Line Items]
Loss Contingency, Estimate of Possible Loss				$ 260