v3.26.3
Charges and Credits - Summary of Charges and Credits (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Charges And Credits [Line Items]                
Charges and credits, Pretax Charge (Credit)             $ 352 $ 546
Charges and credits, Tax Benefit (Expense)             40 53
Charges and credits, Noncontrolling Interests             7 12
Charges and credits, Net             $ 305 $ 481
Location, Statement of Income, Balance [Axis]: us-gaap:BusinessCombinationIntegrationRelatedCosts | Merger and Integration                
Charges And Credits [Line Items]                
Charges and credits, Pretax Charge (Credit) $ 55 $ 69 $ 41          
Charges and credits, Tax Benefit (Expense) 13 19 8          
Charges and credits, Noncontrolling Interests 2 3 2          
Charges and credits, Net 40 $ 47 $ 31          
Location, Statement of Income, Balance [Axis]: us-gaap:BusinessCombinationIntegrationRelatedCosts | Acquisition Related Professional Fees                
Charges And Credits [Line Items]                
Charges and credits, Pretax Charge (Credit)       $ 61        
Charges and credits, Net       61        
Location, Statement of Income, Balance [Axis]: us-gaap:BusinessCombinationIntegrationRelatedCosts | Acquisition Related Employee Benefits                
Charges And Credits [Line Items]                
Charges and credits, Pretax Charge (Credit)       54        
Charges and credits, Tax Benefit (Expense)       2        
Charges and credits, Net       52        
Location, Statement of Income, Balance [Axis]: us-gaap:BusinessCombinationIntegrationRelatedCosts | Other Merger and Integration                
Charges And Credits [Line Items]                
Charges and credits, Pretax Charge (Credit)       28 $ 35 $ 49    
Charges and credits, Tax Benefit (Expense)       2 4 1    
Charges and credits, Noncontrolling Interests       4 4 4    
Charges and credits, Net       22 27 44    
Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold | Amortization of Inventory Fair Value Adjustment                
Charges And Credits [Line Items]                
Charges and credits, Pretax Charge (Credit)       66        
Charges and credits, Tax Benefit (Expense)       15        
Charges and credits, Net       51        
Location, Statement of Income, Balance [Axis]: us-gaap:RestructuringCharges | Impairment of Equity Method Investment                
Charges And Credits [Line Items]                
Charges and credits, Pretax Charge (Credit)       52 69      
Charges and credits, Tax Benefit (Expense)       4 12      
Charges and credits, Net       48 57      
Location, Statement of Income, Balance [Axis]: us-gaap:RestructuringCharges | Workforce Reductions                
Charges And Credits [Line Items]                
Charges and credits, Pretax Charge (Credit)       57 66 158    
Charges and credits, Tax Benefit (Expense)       4 3 10    
Charges and credits, Net       $ 53 63 $ 148    
Location, Statement of Income, Balance [Axis]: us-gaap:RestructuringCharges | Pension settlement charge                
Charges And Credits [Line Items]                
Charges and credits, Pretax Charge (Credit) 187              
Charges and credits, Net $ 187              
Location, Statement of Income, Balance [Axis]: slb:InterestIncomeAndOther | Gain on Sale of Palliser APS Project                
Charges And Credits [Line Items]                
Charges and credits, Pretax Charge (Credit)         (149)      
Charges and credits, Tax Benefit (Expense)         (4)      
Charges and credits, Net         $ (145)