CONSOLIDATED STATEMENT OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Revenue		$ 9,010	$ 12,054	$ 19,258	$ 23,294
Interest & other income		47	64	96	141
Expenses
Cost of revenue		7,136	9,269	15,231	18,017
Research & engineering		279	309	546	593
General & administrative		120	123	239	228
Restructuring & other		0		439	0
Interest		86	90	169	193
Income before taxes		1,436	2,327	2,730	4,404
Taxes on income		302	506	608	975
Income from continuing operations		1,134	1,821	2,122	3,429
Loss from discontinued operations			(205)		(205)
Net income		1,134	1,616	2,122	3,224
Net income attributable to noncontrolling interests		10	21	23	37
Net income attributable to Schlumberger		1,124	1,595	2,099	3,187
Schlumberger amounts attributable to:
Income from continuing operations		1,124	1,800	2,099	3,392
Loss from discontinued operations			(205)		(205)
Net income attributable to Schlumberger		$ 1,124	$ 1,595	$ 2,099	$ 3,187
Basic earnings per share of Schlumberger
Income from continuing operations		$ 0.89	$ 1.38	$ 1.65	$ 2.60
Loss from discontinued operations			(0.16)		(0.16)
Net income	[1]	0.89	1.23	1.65	2.45
Diluted earnings per share of Schlumberger
Income from continuing operations		0.88	1.37	1.64	2.58
Loss from discontinued operations			(0.16)		(0.16)
Net income		$ 0.88	$ 1.21	$ 1.64	$ 2.42
Average shares outstanding:
Basic		1,269	1,300	1,273	1,303
Assuming dilution		1,280	1,315	1,282	1,316

[1] Amounts may not add due to rounding.