CONSOLIDATED STATEMENT OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Revenue	$ 8,472	$ 12,646	$ 27,731	$ 35,939
Interest & other income	60	79	155	220
Expenses
Cost of revenue	6,798	9,689	22,028	27,708
Research & engineering	273	301	819	893
General & administrative	122	125	362	353
Restructuring & other	0		439	0
Interest	86	90	254	282
Income before taxes	1,253	2,520	3,984	6,923
Taxes on income	250	556	859	1,530
Income from continuing operations	1,003	1,964	3,125	5,393
Loss from discontinued operations				(205)
Net income	1,003	1,964	3,125	5,188
Net income attributable to noncontrolling interests	14	15	37	52
Net income attributable to Schlumberger	989	1,949	3,088	5,136
Schlumberger amounts attributable to:
Income from continuing operations	989	1,949	3,088	5,341
Loss from discontinued operations				(205)
Net income attributable to Schlumberger	$ 989	$ 1,949	$ 3,088	$ 5,136
Basic earnings per share of Schlumberger
Income from continuing operations	$ 0.78	$ 1.51	$ 2.43	$ 4.11
Loss from discontinued operations				(0.16)
Net income	0.78	1.51	2.43	3.95
Diluted earnings per share of Schlumberger
Income from continuing operations	0.78	1.49	2.42	4.07
Loss from discontinued operations				(0.16)
Net income	$ 0.78	$ 1.49	$ 2.42	$ 3.91
Average shares outstanding:
Basic	1,265	1,294	1,270	1,300
Assuming dilution	1,272	1,310	1,278	1,314