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Property, Plant and Equipment (Details) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Property, Plant, and Equipment    
Total property, plant and equipment, gross $ 4,026 $ 4,003
Less: Accumulated depreciation 1,532 1,431
Total property, plant and equipment, net 2,494 2,572
Land and improvements    
Property, Plant, and Equipment    
Total property, plant and equipment, gross 44 48
Buildings    
Property, Plant, and Equipment    
Total property, plant and equipment, gross 82 83
Machinery and equipment    
Property, Plant, and Equipment    
Total property, plant and equipment, gross 3,750 3,734
Other    
Property, Plant, and Equipment    
Total property, plant and equipment, gross $ 150 $ 138