CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (81)	$ (2,146)	$ 203	$ (1,623)
Currency translation adjustments
Unrealized net change arising during the period	(71)	(70)	(26)	(51)
Marketable securities
Unrealized gain (loss) arising during the period	(21)		(25)	3
Cash flow hedges
Net gain (loss) on cash flow hedges		17	11	(68)
Reclassification to net income (loss) of net realized loss (gain)	8	(14)	8	80
Actuarial loss
Amortization to net income (loss) of net actuarial loss	36	34	79	79
Prior service cost
Amortization to net income (loss) of net prior service cost	20	26	40	51
Income taxes on pension and other postretirement benefit plans	(1)	(7)	(2)	(14)
Comprehensive income (loss)	(110)	(2,160)	288	(1,543)
Comprehensive income (loss) attributable to noncontrolling interests	(7)	14	(2)	36
Comprehensive income (loss) attributable to Schlumberger	$ (103)	$ (2,174)	$ 290	$ (1,579)