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Summary of Significant Accounting Policies - Additional Information (Detail)
shares in Millions
 3 Months Ended 12 Months Ended
Sep. 30, 2016
USD ($)
Dec. 31, 2015
USD ($)
Mar. 31, 2015
USD ($)
Dec. 31, 2016
USD ($)
Reporting_Unit
shares
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
USD ($)
shares
Indefinite-lived Intangible Assets [Line Items]            
Maturity period of investments description       Three months or less    
Minimum derivative financial instrument's term (months)       2 months    
Maximum derivative financial instrument's term (months)       24 months    
Additional inventory reserve charges       $ 582,000,000    
Inventory reserves total   $ 500,000,000   $ 1,017,000,000 $ 500,000,000  
Percentage of inventory reserve   9.70%   23.40% 9.70%  
Depreciation expense related to property, plant and equipment       $ 370,000,000 $ 391,000,000 $ 413,000,000
Accumulated depreciation   $ 2,152,000,000   2,298,000,000 2,152,000,000  
Accumulated depreciation for capital leases       6,000,000    
Impairment of long-lived assets       54,000,000 0 0
Goodwill   6,980,000,000   6,067,000,000 6,980,000,000 8,539,000,000
Indefinite-lived intangible assets   3,849,000,000   $ 3,530,000,000 3,849,000,000  
Estimated useful lives of intangible assets, minimum       2 years    
Estimated useful lives of intangible assets, maximum       30 years    
Amortization expense       $ 320,000,000    
Number of years as first period of amortization       5 years    
Impairment of goodwill       $ 972,000,000 1,485,000,000  
Net foreign currency transaction gains (losses)       (10,000,000) (47,000,000) $ 20,000,000
Net investment in Venezuela       0    
Devaluation charges   7,000,000 $ 9,000,000      
Net allowances for doubtful accounts   159,000,000   $ 209,000,000 $ 159,000,000  
Anti-dilutive stock options outstanding | shares       14 13 8
Indefinite-lived Trade Names [Member]            
Indefinite-lived Intangible Assets [Line Items]            
Indefinite-lived intangible assets       $ 384,000,000    
Rig Systems [Member]            
Indefinite-lived Intangible Assets [Line Items]            
Goodwill   $ 1,232,000,000   258,000,000 $ 1,232,000,000 $ 1,236,000,000
Impairment of goodwill       $ 972,000,000    
Number of reporting units has impairment loss | Reporting_Unit       2    
Rig Offshore [Member]            
Indefinite-lived Intangible Assets [Line Items]            
Impairment of goodwill $ 972,000,000