COMMITMENTS AND CONTINGENT LIABILITES (Dow Silicones Chapter 11 Related Matters) (Details) (Details) - Dow Silicones Corporation [Member] - USD ($) $ in Millions		3 Months Ended
	Jun. 01, 2004	Sep. 30, 2019	Sep. 30, 2020	Dec. 31, 2019
Product Liability Contingency [Line Items]
Indemnification Asset			$ 115	$ 100
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			62
Loss Contingency Accrual, Product Liability, Net			160	165
Loss Contingency Accrual, Period Increase (Decrease)		$ 98
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			14	20
Other Noncurrent Obligations [Member] | Breast Implant and Other Products Liability Claims [Member]
Product Liability Contingency [Line Items]
Loss Contingency Accrual, Product Liability, Net			$ 146	$ 145
Commercial Creditors Litigation [Member]
Product Liability Contingency [Line Items]
Loss Contingency Accrual, Period Increase (Decrease)		50
Payments for Legal Settlements	$ 1,500
Indemnification Asset		37
Commercial Creditors Litigation [Member] | Accrued and Other Current Liabilities [Member]
Product Liability Contingency [Line Items]
Estimated Litigation Liability		172
Class 16 receivable [Member] | Breast Implant and Other Products Liability Claims [Member]
Product Liability Contingency [Line Items]
Loss Contingency Accrual, Period Increase (Decrease)		$ 13