Earnings Per Share - Reconciliation of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Schlumberger Net Income (Loss)
Basic	$ 176	$ 989	$ (1,482)	$ 3,088
Diluted	$ 176	$ 989	$ (1,482)	$ 3,088
Average Shares Outstanding
Basic	1,392	1,265	1,345	1,270
Assumed exercise of stock options	4	3		4
Unvested restricted stock	5	4		4
Diluted	1,401	1,272	1,345	1,278
Earnings (Loss) per Share
Basic	$ 0.13	$ 0.78	$ (1.10)	$ 2.43
Diluted	$ 0.13	$ 0.78	$ (1.10)	$ 2.42