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PROPERTIES AND ACCUMULATED DEPRECIATION (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]      
Properties and equipment at cost $ 12,370 $ 11,699  
Less: Accumulated depreciation 6,763 6,423  
Net properties 5,607 5,276  
Property, Plant, and Equipment, Additional Disclosures [Abstract]      
Depreciation expense 420 412 $ 402
Cumulative construction-period interest 111 169  
Accumulated depreciation for cumulative construction-period interest 49 111  
Interest capitalized 8 7 $ 7
Land [Member]      
Property, Plant and Equipment [Line Items]      
Properties and equipment at cost 161 157  
Buildings and Building Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Properties and equipment at cost 1,325 1,256  
Machinery and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Properties and equipment at cost 10,122 9,646  
Construction in Progress [Member]      
Property, Plant and Equipment [Line Items]      
Properties and equipment at cost $ 762 $ 640