Earnings (Loss) Per Share - Reconciliation of Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Schlumberger Net Income (Loss)
Basic	$ (7,376)	$ 421
Diluted	$ (7,376)	$ 421
Average Shares Outstanding
Basic	1,387	1,385
Unvested restricted stock		12
Diluted	1,387	1,397
Earnings (loss) per Share
Basic	$ (5.32)	$ 0.30
Diluted	$ (5.32)	$ 0.30

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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Number of additional shares included in diluted EPS for potentially dilutive effect of nonvested equity-based payment award containing forfeitable rights to dividends or dividend equivalents, whether paid or unpaid.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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