CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 190	$ 1,003	$ (1,432)	$ 3,125
Currency translation adjustments
Unrealized net change arising during the period	27	(166)	(26)	(260)
Marketable securities
Unrealized loss arising during the period	(5)	(26)	(2)	(36)
Cash flow hedges
Net loss on cash flow hedges	(18)	(13)	(86)	(123)
Reclassification to net income of net realized loss	29	21	109	161
Actuarial loss
Amortization to net income of net actuarial loss	40	87	119	230
Prior service cost
Amortization to net income of net prior service cost	25	25	76	76
Income taxes on pension and other postretirement benefit plans	(6)	(13)	(20)	(35)
Comprehensive income (loss)	282	918	(1,262)	3,138
Comprehensive income attributable to noncontrolling interests	14	14	50	37
Comprehensive income (loss) attributable to Schlumberger	$ 268	$ 904	$ (1,312)	$ 3,101