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Basis of Presentation (Policies)	6 Months Ended
Basis of Presentation (Policies)	Jun. 30, 2015
Organization Consolidation And Presentation Of Financial Statements [Abstract]
New Accounting Pronouncement	New Accounting Pronouncement In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers. This ASU amends the existing accounting standards for revenue recognition and is based on the principle that revenue should be recognized to depict the transfer of goods or services to a customer at an amount that reflects the consideration a company expects to receive in exchange for those goods or services. Schlumberger is required to adopt this ASU no later than January 1, 2018 with early adoption permitted on January 1, 2017. Schlumberger does not expect this ASU to have a material impact on its consolidated financial statements.