Income Taxes	9 Months Ended
Sep. 30, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We estimate our annual effective tax rate based on year-to-date operating results and our forecast of operating results for the remainder of the year, by jurisdiction, and apply this rate to the year-to-date operating results. If our actual results, by jurisdiction, differ from the forecasted operating results, our effective tax rate can change affecting the tax expense for both successive interim results as well as the annual tax results. For the three and nine months ended September 30, 2014, we had a tax provision of $98 million and $136 million on an income before income taxes of $187 million and $60 million. Our results for the three months ended September 30, 2014 were impacted by discrete income before tax items, including restructuring charges of approximately $154 million, with no significant tax benefit. Our results for the nine months ended September 30, 2014, includes a $143 million impairment loss ($121 million, net of tax) to record the land drilling and workover rig operations in Russia and Venezuela at fair value and a $121 million impairment charge to goodwill triggered by the sale of our land drilling and workover rig operations in Russia, which was non-deductible for income tax purposes. Our results for the nine months ended September 30, 2014 were also impacted by other discrete income before tax items, including restructuring charges of $283 million and project losses of $50 million, with no significant tax benefit. We are continuously under tax examination in various jurisdictions. We cannot predict the timing or outcome regarding resolution of these tax examinations or if they will have a material impact on our financial statements. We continue to anticipate a possible reduction in the balance of uncertain tax positions by approximately $25 million in the next twelve months due to expiration of statutes of limitations, settlements and/or conclusions of tax examinations. For the three and nine months ended September 30, 2013, we had a tax provision of $49 million and $74 million on an income before income taxes of $80 million and $24 million. Our income before income taxes for the nine months ended September 30, 2013 includes a $153 million charge for the settlement of the United Nations oil-for-food program governing sales of goods into Iraq and Foreign Corrupt Practices Act (“FCPA”) matters with no tax benefit. Our tax provision for the three months ended September 30, 2013 includes discrete tax benefits primarily due to audit closures and tax planning activities, which decreased our effective tax rate for the period. Our provision for the nine months ended September 30, 2013, in addition to items above, also includes discrete tax benefits due to the devaluation of the Venezuelan bolivar, return-to-accrual adjustments, decreases in reserves for uncertain tax positions due to statute of limitation expiration and the enactment of the American Taxpayer Relief Act, which decreased our effective tax rate for the period.

Income Taxes

We estimate our annual effective tax rate based on year-to-date operating results and our forecast of operating results for the remainder of the year, by jurisdiction, and apply this rate to the year-to-date operating results. If our actual results, by jurisdiction, differ from the forecasted operating results, our effective tax rate can change affecting the tax expense for both successive interim results as well as the annual tax results. For the three and nine months ended September 30, 2014, we had a tax provision of $98 million and $136 million on an income before income taxes of $187 million and $60 million. Our results for the three months ended September 30, 2014 were impacted by discrete income before tax items, including restructuring charges of approximately $154 million, with no significant tax benefit. Our results for the nine months ended September 30, 2014, includes a $143 million impairment loss ($121 million, net of tax) to record the land drilling and workover rig operations in Russia and Venezuela at fair value and a $121 million impairment charge to goodwill triggered by the sale of our land drilling and workover rig operations in Russia, which was non-deductible for income tax purposes. Our results for the nine months ended September 30, 2014 were also impacted by other discrete income before tax items, including restructuring charges of $283 million and project losses of $50 million, with no significant tax benefit.

We are continuously under tax examination in various jurisdictions. We cannot predict the timing or outcome regarding resolution of these tax examinations or if they will have a material impact on our financial statements. We continue to anticipate a possible reduction in the balance of uncertain tax positions by approximately $25 million in the next twelve months due to expiration of statutes of limitations, settlements and/or conclusions of tax examinations.

For the three and nine months ended September 30, 2013, we had a tax provision of $49 million and $74 million on an income before income taxes of $80 million and $24 million. Our income before income taxes for the nine months ended September 30, 2013 includes a $153 million charge for the settlement of the United Nations oil-for-food program governing sales of goods into Iraq and Foreign Corrupt Practices Act (“FCPA”) matters with no tax benefit. Our tax provision for the three months ended September 30, 2013 includes discrete tax benefits primarily due to audit closures and tax planning activities, which decreased our effective tax rate for the period. Our provision for the nine months ended September 30, 2013, in addition to items above, also includes discrete tax benefits due to the devaluation of the Venezuelan bolivar, return-to-accrual adjustments, decreases in reserves for uncertain tax positions due to statute of limitation expiration and the enactment of the American Taxpayer Relief Act, which decreased our effective tax rate for the period.