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Earnings Per Share - Reconciliation of Earnings Per Share (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Net Income Attributable to Schlumberger    
Basic $ 752 $ 797
Diluted $ 752 $ 797
Average Shares Outstanding    
Basic 1,499 1,366
Assumed exercise of stock options 1  
Unvested restricted stock 15 14
Diluted 1,515 1,380
Earnings per Share    
Basic $ 0.5 $ 0.58
Diluted $ 0.5 $ 0.58