COMMITMENTS AND CONTINGENT LIABILITIES (Asset Retirement Obligations) (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) wells brinesandwells countries manufacturingsites	Dec. 31, 2016 USD ($)
Loss Contingencies [Line Items]
Number of Manufacturing Sites | manufacturingsites	178
Number of Countries With Manufacturing Sites | countries	35
Conditional Asset Retirement Obligations Carrying Value	$ 20	$ 31
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at Jan 1	110	96
Additional accruals	3	17
Liabilities settled	(9)	(9)
Accretion expense	5	2
Revisions in estimated cash flows	(9)	5
Other	(4)	(1)
Balance at Dec 31	$ 104	$ 110
Asset retirement obligation discount rate	2.04%	1.87%
Number of underground storage wells without conditional asset retirement obligation | wells	42
Number of underground brine, mining and other wells without conditional asset retirement obligation | brinesandwells	141
Dow Corning, Ownership Restructure [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Additional accruals	$ 14