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Summary of Accounting Policies - Reconciliation of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net Income (Loss) Attributable to Schlumberger
Basic	$ 1,881	$ (10,518)	$ (10,137)
Diluted	$ 1,881	$ (10,518)	$ (10,137)
Average Shares Outstanding
Basic	1,400	1,390	1,385
Unvested restricted stock	27
Diluted	1,427	1,390	1,385
Earnings (Loss) per Share
Basic	$ 1.34	$ (7.57)	$ (7.32)
Diluted	$ 1.32	$ (7.57)	$ (7.32)

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