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Asset Impairments - Additional Information (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
May 31, 2019
Mar. 31, 2019
Dec. 31, 2018
Indefinite Lived Intangible Assets By Major Class [Line Items]          
Goodwill $ 3,206 $ 3,206 $ 6,300   $ 6,264
Identifiable intangible assets 900 $ 900 400   3,020
Decrease in trade percentage   14.00%      
Impairment charge on goodwill   $ 3,099      
Impairment of intangible assets, indefinite-lived (excluding goodwill)   87      
Property, plant and equipment     2,600    
Other finite-lived intangible assets     2,500    
Impairment of Intangible Assets, Finite-lived 1,901        
Impairment of property, plant and equipment 230        
Impairment of right-of-use assets 56        
Accumulated goodwill impairment 5,556 5,556   $ 2,457  
Additional goodwill impaired accumulated impairment loss 4 4      
Goodwill adjustments   8      
Intangibles, net 900 900 $ 400   3,020
Impairment of property, plant and equipment and right-of-use assets   287      
Rig Technologies [Member]          
Indefinite Lived Intangible Assets By Major Class [Line Items]          
Goodwill 1,005 1,005     1,212
Impairment charge on goodwill   220      
Impairment of property, plant and equipment and right-of-use assets   67      
Rig Technologies [Member] | Rig Equipment [Member]          
Indefinite Lived Intangible Assets By Major Class [Line Items]          
Goodwill 851 851      
Rig Technologies [Member] | Marine Construction [Member]          
Indefinite Lived Intangible Assets By Major Class [Line Items]          
Goodwill 154 154      
Wellbore Technologies [Member]          
Indefinite Lived Intangible Assets By Major Class [Line Items]          
Goodwill 1,160 1,160     3,011
Impairment charge on goodwill   1,866      
Impairment of property, plant and equipment and right-of-use assets   73      
Wellbore Technologies [Member] | Downhole [Member]          
Indefinite Lived Intangible Assets By Major Class [Line Items]          
Goodwill 265 265      
Wellbore Technologies [Member] | ReedHycalog [Member]          
Indefinite Lived Intangible Assets By Major Class [Line Items]          
Goodwill 359 359      
Wellbore Technologies [Member] | Grant Prideco [Member]          
Indefinite Lived Intangible Assets By Major Class [Line Items]          
Goodwill 194 194      
Wellbore Technologies [Member] | Tuboscope [Member]          
Indefinite Lived Intangible Assets By Major Class [Line Items]          
Goodwill 37 37      
Wellbore Technologies [Member] | WellSite [Member]          
Indefinite Lived Intangible Assets By Major Class [Line Items]          
Goodwill 305 305      
Completion & Production Solutions [Member]          
Indefinite Lived Intangible Assets By Major Class [Line Items]          
Goodwill 1,041 1,041     $ 2,041
Impairment charge on goodwill   1,013      
Impairment of property, plant and equipment and right-of-use assets   146      
Completion & Production Solutions [Member] | Intervention and Stimulation Equipment [Member]          
Indefinite Lived Intangible Assets By Major Class [Line Items]          
Goodwill 7 7      
Completion & Production Solutions [Member] | Floating Production Systems [Member]          
Indefinite Lived Intangible Assets By Major Class [Line Items]          
Goodwill 60 60      
Completion & Production Solutions [Member] | XL Systems [Member]          
Indefinite Lived Intangible Assets By Major Class [Line Items]          
Goodwill 65 65      
Completion & Production Solutions [Member] | Fiber Glass Systems [Member]          
Indefinite Lived Intangible Assets By Major Class [Line Items]          
Goodwill 526 526      
Completion & Production Solutions [Member] | Process and Flow Technologies [Member]          
Indefinite Lived Intangible Assets By Major Class [Line Items]          
Goodwill 353 353      
Completion & Production Solutions [Member] | Completion Tools [Member]          
Indefinite Lived Intangible Assets By Major Class [Line Items]          
Goodwill $ 25 $ 25