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Asset Impairments - Additional Information (Detail)
$ in Millions
 3 Months Ended
Mar. 31, 2020
USD ($)
$ / Barrel
Dec. 31, 2019
USD ($)
Indefinite Lived Intangible Assets By Major Class [Line Items]    
Decrease in oil price per barrel | $ / Barrel 40  
Impairment charge on goodwill $ 1,295  
Impairment of intangible assets, indefinite-lived (excluding goodwill) 83  
Goodwill 1,515 $ 2,807
Impairment of Intangible Assets, Finite-lived 209  
Impairment of property, plant and equipment 262  
Impairment of right-of-use assets 42  
Impairment on equity investment 224  
Intangibles, net 534 852
Impairment of property, plant and equipment 304  
Wellbore Technologies [Member]    
Indefinite Lived Intangible Assets By Major Class [Line Items]    
Impairment charge on goodwill 517  
Goodwill 330 843
Impairment of property, plant and equipment 71  
Completion & Production Solutions [Member]    
Indefinite Lived Intangible Assets By Major Class [Line Items]    
Impairment charge on goodwill 580  
Goodwill 473 1,054
Impairment of property, plant and equipment 221  
Rig Technologies [Member]    
Indefinite Lived Intangible Assets By Major Class [Line Items]    
Impairment charge on goodwill 198  
Goodwill 712 $ 910
Impairment of property, plant and equipment 12  
Marine Construction [Member]    
Indefinite Lived Intangible Assets By Major Class [Line Items]    
Goodwill 51  
Rig Equipment [Member]    
Indefinite Lived Intangible Assets By Major Class [Line Items]    
Goodwill 661  
ReedHycalog [Member]    
Indefinite Lived Intangible Assets By Major Class [Line Items]    
Goodwill 124  
WellSite [Member]    
Indefinite Lived Intangible Assets By Major Class [Line Items]    
Goodwill 174  
M/D Totco [Member]    
Indefinite Lived Intangible Assets By Major Class [Line Items]    
Goodwill 32  
XL Systems [Member]    
Indefinite Lived Intangible Assets By Major Class [Line Items]    
Goodwill 64  
Fiberglass Systems [Member]    
Indefinite Lived Intangible Assets By Major Class [Line Items]    
Goodwill 346  
Process and Flow Technologies [Member]    
Indefinite Lived Intangible Assets By Major Class [Line Items]    
Goodwill $ 63