COMMITMENTS AND CONTINGENT LIABILITES (Dow Corning Chapter 11 Related Matters) (Details) (Details) - Dow Corning Corporation [Member] - USD ($) $ in Millions	Jun. 01, 2004	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jun. 01, 2016
Product Liability Contingency [Line Items]
Business Combination, Indemnification Assets, Percentage of Future Losses					50.00%
Indemnification Asset		$ 0		$ 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		130
Loss Contingency Accrual, Product Liability, Net		263	$ 263
Product Liability Contingency, Loss Exposure, Best Estimate		2,015
Commercial Creditors Litigation [Domain]
Product Liability Contingency [Line Items]
Payments for Legal Settlements	$ 1,500
Commercial Creditors Litigation [Domain]
Product Liability Contingency [Line Items]
Estimated Litigation Liability		$ 79	$ 78