CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 523	$ 988
Currency translation adjustments
Unrealized net change arising during the period	17	(113)
Marketable securities
Unrealized gain (loss) arising during the period	3	(18)
Cash flow hedges
Net loss on cash flow hedges	(85)	(152)
Reclassification to net income of net realized loss	94	118
Actuarial loss
Amortization to net income of net actuarial loss	45	74
Prior service cost
Amortization to net income of net prior service cost	25	27
Income taxes on pension and other postretirement benefit plans	(7)	(15)
Comprehensive income	615	909
Comprehensive income attributable to noncontrolling interests	22	13
Comprehensive income attributable to Schlumberger	$ 593	$ 896