CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 2,135	$ 5,506	$ 6,774
Currency translation adjustments
Unrealized net change arising during the period	(522)	(463)	(151)
Marketable securities
Unrealized (loss) gain arising during the period	(50)	(166)	35
Reclassification to net income - impairment charge	40
Cash flow hedges
Net (loss) gain on cash flow hedges	(178)	(238)	49
Reclassification to net income of net realized gain (loss)	235	113	(50)
Actuarial gain (loss)
Actuarial (loss) gain arising during the period	(210)	(1,285)	1,328
Amortization to net income of net actuarial loss	306	177	300
Prior service cost
Amortization to net income of net prior service cost	101	128	125
Income taxes on pension and other postretirement benefit plans	(74)	82	(302)
Comprehensive income	1,783	3,854	8,108
Comprehensive income attributable to noncontrolling interests	63	68	42
Comprehensive income attributable to Schlumberger	$ 1,720	$ 3,786	$ 8,066