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PROPERTY AND EQUIPMENT - Property and Equipment, Net (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Property and Equipment    
Property and equipment, Gross $ 2,021 $ 1,896
Less: Accumulated depreciation (1,113) (1,018)
Total 908 878
Land and improvements    
Property and Equipment    
Property and equipment, Gross 66 64
Buildings    
Property and Equipment    
Property and equipment, Gross 522 497
Computer hardware and software    
Property and Equipment    
Property and equipment, Gross 249 232
Machinery and equipment    
Property and Equipment    
Property and equipment, Gross $ 1,184 $ 1,103