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Asset Impairments - Additional Information (Detail)
$ in Millions
 3 Months Ended 6 Months Ended
Mar. 31, 2020
USD ($)
$ / Barrel
Jun. 30, 2020
USD ($)
Dec. 31, 2019
USD ($)
Indefinite Lived Intangible Assets By Major Class [Line Items]      
Decrease in oil price per barrel | $ / Barrel 40    
Impairment charge on goodwill $ 1,295 $ 1,295  
Impairment of intangible assets, indefinite-lived (excluding goodwill) 83    
Goodwill   1,493 $ 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   525 $ 852
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   10  
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