CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (2,146)	$ 1,134	$ (1,623)	$ 2,122
Currency translation adjustments
Unrealized net change arising during the period	(70)	19	(51)	(94)
Marketable securities
Unrealized gain (loss) arising during the period		8	3	(10)
Cash flow hedges
Net gain (loss) on cash flow hedges	17	42	(68)	(110)
Reclassification to net income (loss) of net realized loss	(14)	22	80	140
Actuarial loss
Amortization to net income (loss) of net actuarial loss	34	69	79	143
Prior service cost
Amortization to net income (loss) of net prior service cost	26	24	51	51
Income taxes on pension and other postretirement benefit plans	(7)	(7)	(14)	(22)
Comprehensive income (loss)	(2,160)	1,311	(1,543)	2,220
Comprehensive income attributable to noncontrolling interests	14	10	36	23
Comprehensive income (loss) attributable to Schlumberger	$ (2,174)	$ 1,301	$ (1,579)	$ 2,197