COMMITMENTS AND CONTINGENT LIABILITES (Dow Silicones Chapter 11 Related Matters) (Details) - Dow Silicones Corporation [Member] - Breast Implant and Other Products Liability Claims [Member] - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Product Liability Contingency [Line Items]
Product Liability Contingency, Payments Incurred To Date	$ 1,762
Product Liability Contingency, Unexpended Balance	55
Loss Contingency Accrual, Product Liability, Net	160	$ 160
Accrued and Other Current Liabilities [Member]
Product Liability Contingency [Line Items]
Loss Contingency Accrual, Product Liability, Net	79	46
Other Noncurrent Obligations [Member]
Product Liability Contingency [Line Items]
Loss Contingency Accrual, Product Liability, Net	$ 81	$ 114