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PROPERTIES AND ACCUMULATED DEPRECIATION (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]      
Properties and equipment at cost $ 12,904 $ 12,731  
Less: Accumulated depreciation 7,333 7,131  
Net properties 5,571 5,600  
Property, Plant, and Equipment, Additional Disclosures [Abstract]      
Depreciation expense 450 437 $ 420
Cumulative construction-period interest 98 115  
Accumulated depreciation for cumulative construction-period interest 38 54  
Interest capitalized 4 4 $ 8
Land [Member]      
Property, Plant and Equipment [Line Items]      
Properties and equipment at cost 158 158  
Buildings and Building Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Properties and equipment at cost 1,430 1,385  
Machinery and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Properties and equipment at cost 10,960 10,801  
Construction in Progress [Member]      
Property, Plant and Equipment [Line Items]      
Properties and equipment at cost $ 356 $ 387