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PROPERTY AND EQUIPMENT - Property and Equipment, Net (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Property and Equipment    
Property and equipment, Gross $ 2,798 $ 2,665
Less: Accumulated depreciation (1,575) (1,536)
Total 1,223 1,129
Land and improvements    
Property and Equipment    
Property and equipment, Gross 107 110
Buildings    
Property and Equipment    
Property and equipment, Gross 699 681
Computer Equipment    
Property and Equipment    
Property and equipment, Gross 367 327
Machinery and equipment    
Property and Equipment    
Property and equipment, Gross $ 1,625 $ 1,547