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PROPERTIES AND ACCUMULATED DEPRECIATION (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]      
Properties and equipment at cost $ 12,731 $ 12,370  
Less: Accumulated depreciation 7,131 6,763  
Net properties 5,600 5,607  
Property, Plant, and Equipment, Additional Disclosures [Abstract]      
Depreciation expense 437 420 $ 412
Cumulative construction-period interest 115 111  
Accumulated depreciation for cumulative construction-period interest 54 49  
Interest capitalized 4 8 $ 7
Land [Member]      
Property, Plant and Equipment [Line Items]      
Properties and equipment at cost 158 161  
Buildings and Building Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Properties and equipment at cost 1,385 1,325  
Machinery and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Properties and equipment at cost 10,801 10,122  
Construction in Progress [Member]      
Property, Plant and Equipment [Line Items]      
Properties and equipment at cost $ 387 $ 762