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Property, Plant and Equipment - Property, Plant and Equipment (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Property, plant and equipment Gross $ 5,561 $ 5,448
Less: Accumulated Depreciation (2,559) (2,298)
Property, plant and equipment, net 3,002 3,150
Land and Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment Gross $ 1,592 1,570
Estimated Useful Lives 5-35 Years  
Operating Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment Gross $ 3,169 3,102
Estimated Useful Lives 3-15 Years  
Rental Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment Gross $ 581 557
Estimated Useful Lives 3-12 Years  
Capital Leases [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment Gross $ 219 $ 219
Estimated Useful Lives 20-24 Years