Contingencies	12 Months Ended
Dec. 31, 2014
Commitments And Contingencies Disclosure [Abstract]
Contingencies Disclosure [Text Block]	16. Contingencies In 2009, United States officials began a grand jury investigation and an associated regulatory inquiry, both related to certain historical Schlumberger operations in countrieswhere Schlumberger no longer operates that are subject to United States trade and economic sanctions. Governmental agencies and authorities have a broad range of civil and criminal penalties that they may seek to impose for violations of trade and economic sanction laws including, but not limited to, disgorgement, fines, penalties and modifications to business practices. In recent years, these agencies and authorities have obtained a wide range of penalties in settlements with companies arising from trade and economic sanction investigations, including in some cases forfeitures, fines and other penalties in the tens and hundreds of millions of dollars. Schlumberger continues to cooperate and has been discussing the resolution of this matter with the governmental authorities. During the second quarter of 2014, these discussions progressed to a point whereby Schlumberger determined that it was appropriate to increase its liability for this contingency. Accordingly, Schlumberger recorded a $205 million charge, which is reflected within Loss from discontinued operations in the Consolidated Statement of Income. However, no certainty exists that a settlement will be reached or if so, the amount of any such settlement. Therefore, the ultimate loss could be greater or less than the amount accrued. Schlumberger and its subsidiaries are party to various other legal proceedings from time to time. A liability is accrued when a loss is both probable and can be reasonably estimated. Management believes that the probability of a material loss with respect to these other legal proceedings is remote. However, litigation is inherently uncertain and it is not possible to predict the ultimate disposition of any of these proceedings.

Contingencies

12 Months Ended

Dec. 31, 2014

Commitments And Contingencies Disclosure [Abstract]

16. Contingencies

In 2009, United States officials began a grand jury investigation and an associated regulatory inquiry, both related to certain historical Schlumberger operations in countrieswhere Schlumberger no longer operates that are subject to United States trade and economic sanctions. Governmental agencies and authorities have a broad range of civil and criminal penalties that they may seek to impose for violations of trade and economic sanction laws including, but not limited to, disgorgement, fines, penalties and modifications to business practices. In recent years, these agencies and authorities have obtained a wide range of penalties in settlements with companies arising from trade and economic sanction investigations, including in some cases forfeitures, fines and other penalties in the tens and hundreds of millions of dollars. Schlumberger continues to cooperate and has been discussing the resolution of this matter with the governmental authorities. During the second quarter of 2014, these discussions progressed to a point whereby Schlumberger determined that it was appropriate to increase its liability for this contingency. Accordingly, Schlumberger recorded a $205 million charge, which is reflected within Loss from discontinued operations in the Consolidated Statement of Income. However, no certainty exists that a settlement will be reached or if so, the amount of any such settlement. Therefore, the ultimate loss could be greater or less than the amount accrued.

Schlumberger and its subsidiaries are party to various other legal proceedings from time to time. A liability is accrued when a loss is both probable and can be reasonably estimated. Management believes that the probability of a material loss with respect to these other legal proceedings is remote. However, litigation is inherently uncertain and it is not possible to predict the ultimate disposition of any of these proceedings.