Derivative Instruments and Hedging Activities - Additional Information (Detail)	12 Months Ended		12 Months Ended				12 Months Ended
	Dec. 31, 2013 USD ($) Country	Dec. 31, 2012 USD ($)	Dec. 31, 2013 Guaranteed Notes One Point Five Zero Percent Due Two Thousand Nineteen EUR (€)	Dec. 31, 2012 Foreign exchange contracts USD ($)	Dec. 31, 2012 Foreign exchange contracts Debt Derivatives designated as hedges USD ($)	Dec. 31, 2013 Fixed rate debt Guaranteed Notes One Point Five Zero Percent Due Two Thousand Nineteen	Dec. 31, 2013 Floating rate debt Guaranteed Notes One Point Five Zero Percent Due Two Thousand Nineteen
Derivative [Line Items]
Number of countries in which Schlumberger conducts business	85
Percentage Of Revenue Denominated In Domestic Currency	78.00%
Recognized a cumulative net gain in Accumulated other comprehensive loss relating to revaluation of foreign currency forward contracts and foreign currency options designated as cash flow hedges		$ 29,000,000
Contracts outstanding in various foreign currencies (US dollar equivalent)			500,000,000	7,600,000,000	3,800,000,000
Notional amount of interest rate swap			500,000,000	7,600,000,000	3,800,000,000
Guaranteed notes face amount			500,000,000
Derivative swap interest rate						1.50%	1.50%
Senior note floating interest rate			three-month LIBOR plus approximately 64 basis points.				three-month LIBOR plus approximately 64 basis points
Basis points			6.40%				0.64%
Fixed rate debt aggregate, after taking into account the effects of the interest rate swaps	10,500,000,000
Variable rate debt aggregate, after taking into account the effects of the interest rate swaps	$ 2,700,000,000