CONSOLIDATED STATEMENT OF INCOME (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Income Statement [Abstract]
Revenue	$ 11,182		$ 10,341		$ 21,752		$ 20,150
Interest & other income	30		45		63		92
Gain on formation of OneSubsea	1,028				1,028
Expenses
Cost of revenue	8,712		8,119		17,118		15,884
Research & engineering	293		287		585		558
General & administrative	100		101		196		199
Merger & integration			22				37
Impairment & other	364				456
Interest	98		78		197		158
Income before taxes	2,673		1,779		4,291		3,406
Taxes on income	449		439		855		833
Income from continuing operations	2,224		1,340		3,436		2,573
Income (loss) from discontinued operations	(124)		75		(69)		147
Net income	2,100		1,415		3,367		2,720
Net income attributable to noncontrolling interests	5		12		13		17
Net income attributable to Schlumberger	2,095		1,403		3,354		2,703
Schlumberger amounts attributable to:
Income from continuing operations	2,219		1,328		3,423		2,556
Income (loss) from discontinued operations	(124)		75		(69)		147
Net income attributable to Schlumberger	$ 2,095		$ 1,403		$ 3,354		$ 2,703
Basic earnings per share of Schlumberger:
Income from continuing operations	$ 1.67		$ 1.00		$ 2.58		$ 1.92
Income (loss) from discontinued operations	$ (0.09)		$ 0.06		$ (0.05)		$ 0.11
Net income	$ 1.58	[1]	$ 1.05	[1]	$ 2.52	[1]	$ 2.03	[1]
Diluted earnings per share of Schlumberger:
Income from continuing operations	$ 1.66		$ 0.99		$ 2.56		$ 1.91
Income (loss) from discontinued operations	$ (0.09)		$ 0.06		$ (0.05)		$ 0.11
Net income	$ 1.57		$ 1.05		$ 2.51		$ 2.02
Average shares outstanding:
Basic	1,327		1,331		1,329		1,333
Assuming dilution	1,336		1,339		1,339		1,341

[1] Amounts may not add due to rounding.