COMMITMENTS AND CONTINGENT LIABILITIES (Environmental Matters) (Narrative) (Details) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014
Site Contingency [Line Items]
Accrual for Environmental Loss Contingencies, Charges to Expense for New Losses		$ 172	$ 479
Environmental Remediation Expense		171	504	$ 218
Capital expenditures for environmental protection		79	66	49
Accrual for Environmental Loss Contingencies [Roll Forward]
Accrued Obligations for Environmental Matters, Charges against reserve		(220)	(246)
Accrued Obligations for Environmental Matters, Foreign currency impact		17	6
Other Environmental Matters
Site Contingency [Line Items]
Environmental Remediation Expense	$ 295
Accrual for Environmental Loss Contingencies [Roll Forward]
Accrued Obligations for Environmental Matters, beginning balance		909	670
Accrued Obligations for Environmental Matters, ending balance	909	878	909	$ 670
Other Environmental Matters | Superfund Sites
Accrual for Environmental Loss Contingencies [Roll Forward]
Accrued Obligations for Environmental Matters, beginning balance		151
Accrued Obligations for Environmental Matters, ending balance	151	152	151
Other Environmental Matters, Off-Site Matters
Site Contingency [Line Items]
Number of of Properties Remediated, City of Midland					132
Accrual for Environmental Loss Contingencies [Roll Forward]
Accrued Obligations for Environmental Matters, beginning balance		93
Accrued Obligations for Environmental Matters, ending balance	$ 93	$ 83	$ 93