COMMITMENTS AND CONTINGENT LIABILITES (Dow Silicones Chapter 11 Related Matters) (Details) (Details) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
	Jun. 01, 2004	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018	Jun. 01, 2016
Product Liability Contingency [Line Items]
Document Period End Date			Sep. 30, 2019
Dow Silicones Corporation [Member]
Product Liability Contingency [Line Items]
Business Combination, Indemnification Assets, Percentage of Future Losses					50.00%
Indemnification Asset		$ 100	$ 100	$ 0
Dow Silicones Corporation [Member] | Breast Implant and Other Products Liability Claims [Member]
Product Liability Contingency [Line Items]
Product Liability Contingency, Payments Incurred To Date		1,762	1,762
Product Liability Contingency, Unexpended Balance		81	81
Loss Contingency Accrual, Product Liability, Net		165	165	263
Loss Contingency Accrual, Period Increase (Decrease)		98
Product Liability Contingency, Loss Exposure, Best Estimate		2,220	2,220
Accrued and Other Current Liabilities [Member] | Dow Silicones Corporation [Member] | Breast Implant and Other Products Liability Claims [Member]
Product Liability Contingency [Line Items]
Loss Contingency Accrual, Product Liability, Net		0	0	111
Other Noncurrent Obligations [Member] | Dow Silicones Corporation [Member] | Breast Implant and Other Products Liability Claims [Member]
Product Liability Contingency [Line Items]
Loss Contingency Accrual, Product Liability, Net		165	165	152
Commercial Creditors Litigation [Member] | Dow Silicones Corporation [Member]
Product Liability Contingency [Line Items]
Loss Contingency Accrual, Period Increase (Decrease)		50
Payments for Legal Settlements	$ 1,500
Estimated Litigation Liability		172	172	$ 82
Indemnification Asset		37	37
Commercial Creditors Litigation [Member] | Accrued and Other Current Liabilities [Member] | Dow Silicones Corporation [Member]
Product Liability Contingency [Line Items]
Estimated Litigation Liability		172	$ 172
Class 16 receivable [Member] | Dow Silicones Corporation [Member] | Breast Implant and Other Products Liability Claims [Member]
Product Liability Contingency [Line Items]
Loss Contingency Accrual, Period Increase (Decrease)		$ 13