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Charges and Credits - Additional Information (Detail)
In Millions, unless otherwise specified
3 Months Ended 3 Months Ended
Mar. 31, 2015
USD ($)
Mar. 31, 2014
USD ($)
Mar. 31, 2015
VEF
Dec. 31, 2014
Venezuela Bolivar Official Currency Exchange Rate To Dollar
VEF
Dec. 31, 2014
Venezuela Bolivar Official Currency Exchange Rate To Dollar
SICAD I
VEF
Dec. 31, 2014
Venezuela Bolivar Official Currency Exchange Rate To Dollar
SICAD II
VEF
Mar. 31, 2015
Workforce reduction
USD ($)
Mar. 31, 2015
Currency Devaluation Loss In Venezuela
USD ($)
Dec. 31, 2014
Currency Devaluation Loss In Venezuela
USD ($)
Charges And Credits [Line Items]                  
Restructuring and other charges $ 439slb_RestructuringAndOtherCharges $ 0slb_RestructuringAndOtherCharges         $ 390slb_RestructuringAndOtherCharges
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
$ 49slb_RestructuringAndOtherCharges
/ us-gaap_RestructuringCostAndReserveAxis
= slb_CurrencyDevaluationLossInVenezuelaMember
$ 472slb_RestructuringAndOtherCharges
/ us-gaap_RestructuringCostAndReserveAxis
= slb_CurrencyDevaluationLossInVenezuelaMember
Exchange rate     192.0us-gaap_ForeignCurrencyExchangeRateRemeasurement1 6.3us-gaap_ForeignCurrencyExchangeRateRemeasurement1
/ slb_ExchangeAxis
= slb_VenezuelaBolivarOfficialCurrencyExchangeRateToDollarMember
         
Exchange rate, approximated         11us-gaap_ForeignCurrencyExchangeRateTranslation1
/ slb_ExchangeAxis
= slb_VenezuelaBolivarOfficialCurrencyExchangeRateToDollarMember
/ us-gaap_VariableRateAxis
= slb_SICADIMember
50us-gaap_ForeignCurrencyExchangeRateTranslation1
/ slb_ExchangeAxis
= slb_VenezuelaBolivarOfficialCurrencyExchangeRateToDollarMember
/ us-gaap_VariableRateAxis
= slb_SICADIIMember
     
Foreign currency transactions, description These changes result in a reduction in the US dollar reported amount of local currency denominated revenues, expenses and, consequently, income before taxes and net income in Venezuela. For example, if Schlumberger had applied an exchange rate of 192 Venezuelan Bolivares to the US dollar throughout 2014, it would have reduced Schlumberger earnings by approximately $0.09 per share.