Entity Central Index Key Document Document and Entity Information [Abstract] Document Document And Entity Information [Abstract] Document Document And Entity Information [Abstract] Document and entity information. Document And Entity Information [Table] Document And Entity Information [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Document Document And Entity Information [Line Items] Document Document And Entity Information [Line Items] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Includes operating interest income earned as part of a core business activity, equity income representing the undistributed income or loss of investments which are accounted for under the equity method of accounting, and other miscellaneous income or loss earned from core business activities. Profit loss excluding noncontrolling interests associated with discontinued operations. Income Statement [Abstract] Income Statement [Abstract] Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Revenue Revenues Interest & other income Interest Income And Other Gain on formation of OneSubsea Business Combination Bargain Purchase Gain Recognized Amount Expenses Costs And Expenses [Abstract] Cost of revenue Cost Of Goods And Services Sold Research & engineering Research And Development Expense General & administrative General And Administrative Expense Impairment & other Other Asset Impairment Charges Interest Interest Expense Income from continuing operations before taxes Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments Taxes on income Income Tax Expense Benefit Income from continuing operations Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest Loss from discontinued operations Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity Net income Profit Loss Excluding Noncontrolling Interests Associated With Discontinued Operations Net income attributable to noncontrolling interests Net Income Loss Attributable To Noncontrolling Interest Net income attributable to Schlumberger Net Income Loss Schlumberger amounts attributable to: Net Income Loss Attributable To Reporting Entity [Abstract] Income from continuing operations Income Loss From Continuing Operations Net income Basic earnings per share of Schlumberger: Earnings Per Share Basic [Abstract] Income from continuing operations Income Loss From Continuing Operations Per Basic Share Loss from discontinued operations Income Loss From Discontinued Operations Net Of Tax Per Basic Share Net income Earnings Per Share Basic Diluted earnings per share of Schlumberger: Earnings Per Share Diluted [Abstract] Income from continuing operations Income Loss From Continuing Operations Per Diluted Share Loss from discontinued operations Income Loss From Discontinued Operations Net Of Tax Per Diluted Share Net income Earnings Per Share Diluted Average shares outstanding: Weighted Average Number Of Shares Outstanding [Abstract] Basic Weighted Average Number Of Shares Outstanding Basic Assuming dilution Weighted Average Number Of Diluted Shares Outstanding Actuarial loss. Prior service cost. Statement Of Income And Comprehensive Income [Abstract] Statement Of Income And Comprehensive Income [Abstract] Net income Currency translation adjustments Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Period Increase Decrease [Abstract] Unrealized net change arising during the period Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax Marketable securities Marketable Securities [Abstract] Unrealized gain arising during the period Marketable Securities Unrealized Gain Loss Derivatives Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Period Increase Decrease [Abstract] Net derivatives gain (loss) on hedge transactions Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax Reclassification to net income of net realized (gain) loss (see Note 11) Other Comprehensive Income Loss Reclassification Adjustment From A O C I On Derivatives Net Of Tax Pension and other postretirement benefit plans Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Period Increase Decrease [Abstract] Actuarial loss Actuarial Loss [Abstract] Actuarial loss arising during the period Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax Amortization to net income of net actuarial loss (see Note 15) Other Comprehensive Income Loss Reclassification Adjustment From A O C I Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax Prior service cost Prior Service Cost [Abstract] Amortization to net income of net prior service cost (see Note 15) Other Comprehensive Income Loss Amortization Adjustment From A O C I Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax Income taxes on pension and other postretirement benefit plans Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Plan Amendments Tax Effect Comprehensive income Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest Comprehensive income attributable to noncontrolling interests Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest Comprehensive income attributable to Schlumberger Comprehensive Income Net Of Tax Capitalized costs directly incurred in acquiring and processing of seismic surveys that are licensed on a nonexclusive basis, net of amortization. Statement Of Financial Position [Abstract] Statement Of Financial Position [Abstract] ASSETS Assets [Abstract] Current Assets Assets Current [Abstract] Cash Cash Short-term investments Short Term Investments Receivables less allowance for doubtful accounts (2014 - $407; 2013 - $384) Receivables Net Current Inventories Inventory Net Deferred taxes Deferred Tax Assets Net Current Other current assets Other Assets Current Current assets total Assets Current Fixed Income Investments, held to maturity Held To Maturity Securities Noncurrent Investments in Affiliated Companies Investments In Affiliates Subsidiaries Associates And Joint Ventures Fixed Assets less accumulated depreciation Property Plant And Equipment Net Multiclient Seismic Data Multiclient Seismic Data Goodwill Goodwill Intangible Assets Intangible Assets Net Excluding Goodwill Other Assets Other Assets Noncurrent Total Assets Assets LIABILITIES AND EQUITY Liabilities And Stockholders Equity [Abstract] Current Liabilities Liabilities Current [Abstract] Accounts payable and accrued liabilities Accounts Payable And Accrued Liabilities Current Estimated liability for taxes on income Accrued Income Taxes Current Long-term debt - current portion Long Term Debt Current Short-term borrowings Short Term Borrowings Dividends payable Dividends Payable Current Current Liabilities Total Liabilities Current Long-term Debt Other Long Term Debt Noncurrent Postretirement Benefits Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent Deferred Taxes Deferred Tax Liabilities Noncurrent Other Liabilities Other Liabilities Noncurrent Total Liabilities Liabilities Equity Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Abstract] Common stock Common Stock Value Treasury stock Treasury Stock Value Retained earnings Retained Earnings Accumulated Deficit Accumulated other comprehensive loss Accumulated Other Comprehensive Income Loss Net Of Tax Schlumberger stockholders' equity Stockholders Equity Noncontrolling interests Minority Interest Total equity Stockholders Equity Including Portion Attributable To Noncontrolling Interest Liabilities and stockholders equity Liabilities And Stockholders Equity Allowance for doubtful accounts on receivable Allowance For Doubtful Accounts Receivable Current Equity method investment other than temporary impairment and foreign currency devaluation loss. The net cash outflow from capitalized costs directly incurred in acquiring and processing of seismic surveys that are licensed on a nonexclusive basis. Statement Of Cash Flows [Abstract] Statement Of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided By Used In Operating Activities [Abstract] Add: Loss from discontinued operations Income Loss From Discontinued Operations Net Of Tax Adjustments to reconcile net income to cash provided by operating activities: Net Cash Provided By Used In Operating Activities Continuing Operations [Abstract] Gain on formation of OneSubsea Impairment of equity method investments and currency devaluation loss in Venezuela Equity Method Investment Other Than Temporary Impairment And Foreign Currency Devaluation Loss Depreciation and amortization Depreciation Depletion And Amortization Pension and other postretirement benefits expense Increase Decrease In Pension And Postretirement Obligations Stock-based compensation expense Share Based Compensation Pension and other postretirement benefits funding Pension And Other Postretirement Benefit Contributions Earnings of companies carried at equity, less dividends received Income Loss From Equity Method Investments Net Of Dividends Or Distributions Change in assets and liabilities: Increase Decrease In Operating Capital [Abstract] Increase in receivables Increase Decrease In Receivables Increase in inventories Increase Decrease In Inventories Decrease in other current assets Increase Decrease In Other Current Assets Increase in other assets Increase Decrease In Other Noncurrent Assets Decrease in accounts payable and accrued liabilities Increase Decrease In Accounts Payable And Accrued Liabilities Increase (decrease) in liability for taxes on income Increase Decrease In Accrued Income Taxes Payable (Decrease) increase in other liabilities Increase Decrease In Other Operating Liabilities Other Increase Decrease In Other Operating Capital Net NET CASH PROVIDED BY OPERATING ACTIVITIES Net Cash Provided By Used In Operating Activities Cash flows from investing activities: Net Cash Provided By Used In Investing Activities [Abstract] Capital expenditures Payments To Acquire Property Plant And Equipment SPM investments Payments To Acquire Investments Multiclient seismic data capitalized Payments For Proceeds From Capitalized Costs Support Equipment And Facilities Business acquisitions and investments, net of cash acquired Other Payments To Acquire Businesses Sale of investments, net Payments For Proceeds From Investments Other Payments For Proceeds From Other Investing Activities NET CASH USED IN INVESTING ACTIVITIES Net Cash Provided By Used In Investing Activities Cash flows from financing activities: Net Cash Provided By Used In Financing Activities [Abstract] Dividends paid Payments Of Dividends Proceeds from employee stock purchase plan Proceeds From Stock Plans Proceeds from exercise of stock options Proceeds From Stock Options Exercised Stock repurchase program Payments For Repurchase Of Equity Proceeds from issuance of long-term debt Proceeds From Issuance Of Long Term Debt Repayment of long-term debt Repayments Of Long Term Debt Net decrease in short-term borrowings Proceeds From Repayments Of Short Term Debt Other Proceeds From Payments For Other Financing Activities NET CASH USED IN FINANCING ACTIVITIES Net Cash Provided By Used In Financing Activities Cash flows used in discontinued operations - operating activities Cash Provided By Used In Operating Activities Discontinued Operations Cash flows used in discontinued operations - investing activities Cash Provided By Used In Investing Activities Discontinued Operations Cash flows used in discontinued operations Net Cash Provided By Used In Discontinued Operations Net (decrease) increase in cash before translation effect Cash And Cash Equivalents Period Increase Decrease Translation effect on cash Effect Of Exchange Rate On Cash And Cash Equivalents Cash, beginning of period Cash And Cash Equivalents At Carrying Value Cash, end of period Other comprehensive income change in fair value of derivative and unrealized holding gain loss on marketable securities arising during period net of tax. Other accumulated comprehensive income defined benefit plans adjustment net of tax period increase decrease. Statement Of Stockholders Equity [Abstract] Statement Of Stockholders Equity [Abstract] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock Issued Common Stock [Member] Common Stock In Treasury Treasury Stock [Member] Retained Earnings Retained Earnings [Member] Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Income [Member] Noncontrolling Interests Noncontrolling Interest [Member] Balance Net income Profit Loss Currency translation adjustments Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax Changes in unrealized gain on marketable securities Other Comprehensive Income Change In Fair Value Of Derivative And Unrealized Holding Gain Loss On Marketable Securities Arising During Period Net Of Tax Changes in fair value of derivatives Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax Pension and other postretirement benefit plans Other Accumulated Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Period Increase Decrease Shares sold to optionees, less shares exchanged Stock Issued During Period Value Stock Options Exercised Vesting of restricted stock Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures Shares issued under employee stock purchase plan Stock Issued During Period Value Employee Stock Purchase Plan Stock repurchase program Treasury Stock Value Acquired Cost Method Stock-based compensation expense Stock Issued During Period Value Share Based Compensation Dividends declared Dividends Cash Shares issued for acquisition Stock Issued During Period Value Acquisitions Other Stockholders Equity Other Balance Dividends declared, per share Common Stock Dividends Per Share Declared Number of share options exercised during the current period less shares exchanged. Balance, shares Shares Outstanding Shares sold to optionees, less shares exchanged, shares Stock Issued During Period Shares Stock Options Exercised Less Shares Exchanged Vesting of restricted stock, shares Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures Shares issued under employee stock purchase plan, shares Stock Issued During Period Shares Employee Stock Purchase Plans Shares issued for acquisition, shares Stock Issued During Period Shares Acquisitions Stock repurchase program, shares Treasury Stock Shares Acquired Balance, shares Text Block [Abstract] Basis of Presentation Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] Charges and Credits Restructuring And Related Activities Disclosure [Text Block] Earnings Per Share Earnings Per Share [Text Block] Acquisitions Business Combination Disclosure [Text Block] Inventories Inventory Disclosure [Text Block] Fixed Assets Property Plant And Equipment Disclosure [Text Block] Disclosure of the carrying amount of multiclient seismic data based on completed and in-process seismic surveys. Multiclient Seismic Data Multiclient Seismic Data [Text Block] Goodwill Goodwill Disclosure [Text Block] Intangible Assets Intangible Assets Disclosure [Text Block] Long-term Debt Long Term Debt [Text Block] Derivative Instruments and Hedging Activities Derivative Instruments And Hedging Activities Disclosure [Text Block] Income Tax Income Tax Disclosure [Text Block] Contingencies Commitments And Contingencies Disclosure [Text Block] Segment Information Segment Reporting Disclosure [Text Block] Pension and Other Postretirement Benefits Pension And Other Postretirement Benefits Disclosure [Text Block] Accumulated Other Comprehensive Loss Comprehensive Income Note [Text Block] Discontinued Operations Disposal Groups Including Discontinued Operations Disclosure [Text Block] New Accounting Pronouncement New Accounting Pronouncements Policy Policy [Text Block] Summary of charges. Summary of the Charges Summary Of Charges Table [Text Block] Reconciliation of Earnings Per Share from Continuing Operations Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Text Block] Inventory Disclosure Schedule Of Inventory Current Table [Text Block] Property, Plant and Equipment Property Plant And Equipment [Text Block] Depreciation expense relating to fixed assets. Depreciation Expense Relating to Fixed Assets Depreciation Expense Relating To Fixed Assets Table [Text Block] Disclosure of the carrying amount of multiclient seismic data based on completed and in-process seismic surveys. Multiclient Seismic Data Table Multiclient Seismic Data Table [Text Block] Changes in the carrying amount of goodwill. Changes in Carrying Amount of Goodwill Changes In Carrying Amount Of Goodwill Table [Text Block] Schedule of Intangible Assets by Major Class Schedule Of Finite Lived Intangible Assets Table [Text Block] Amortization expense charged to income for intangible assets. Amortization Expense Charged to Income for Intangible Assets Amortization Expense Charged To Income For Intangible Assets Table [Text Block] Long-term Debt Schedule Of Debt Instruments [Text Block] Fair Values of Outstanding Derivative Instruments Schedule Of Derivative Instruments In Statement Of Financial Position Fair Value [Text Block] Effect of Derivative Instruments Designated as Fair Value Hedges and Not Designated as Hedges on Consolidated Statement of Income Schedule Of Derivative Instruments Gain Loss In Statement Of Financial Performance [Text Block] Effect of Derivative Instruments in Cash Flow Hedging Relationships on Income and Accumulated Other Comprehensive Loss (AOCL) Schedule Of Derivative Instruments Effect On Other Comprehensive Income Loss Table [Text Block] Income Tax Disclosure Table Schedule Of Income Before Income Tax Domestic And Foreign Table [Text Block] Components of Net Deferred Tax Assets Schedule Of Deferred Tax Assets And Liabilities Table [Text Block] Components of Consolidated Income Taxes Schedule Of Components Of Income Tax Expense Benefit Table [Text Block] Reconciliation of US Statutory Federal Tax Rate Schedule Of Effective Income Tax Rate Reconciliation Table [Text Block] Schedule of Segment Reporting Information, by Segment Schedule Of Segment Reporting Information By Segment [Text Block] Net Pension Cost for Schlumberger Pension Plans and US Postretirement Medical Plan Schedule Of Net Benefit Costs Table [Text Block] Schedule of Accumulated Other Comprehensive Loss Schedule Of Accumulated Other Comprehensive Income Loss Table [Text Block] Discontinued Operations Schedule Of Disposal Groups Including Discontinued Operations Income Statement Balance Sheet And Additional Disclosures [Text Block] Foreign currency translation gain loss realized net of tax. Charges. Restructuring And Related Activities [Abstract] Restructuring And Related Activities [Abstract] Schedule Of Restructuring And Related Costs [Table] Schedule Of Restructuring And Related Costs [Table] Entity Listings, Exchange Entity Listings Exchange [Axis] Exchange Exchange [Domain] Venezuela Bolivar official currency exchange rate to dollar. Venezuela Bolivar Official Currency Exchange Rate to Dollar Venezuela Bolivar Official Currency Exchange Rate To Dollar [Member] Restructuring Type Restructuring Cost And Reserve [Axis] Type of Restructuring Type Of Restructuring [Domain] Other Restructuring Other Restructuring [Member] Restructuring Cost And Reserve [Line Items] Restructuring Cost And Reserve [Line Items] Exchange rate Foreign Currency Exchange Rate Remeasurement1 Currency loss before tax Foreign Currency Transaction Gain Loss Realized Currency loss after tax Foreign Currency Translation Gain Loss Realized Net Of Tax Charges or credits recorded in continuing operations Charges Pre tax and after tax gain from deconsolidation of business Deconsolidation Gain Or Loss Amount Asset impairment charge after tax. Investment Investment [Axis] Investment Investment [Domain] Drilling related technology. Drilling Related Technology Drilling Related Technology [Member] Contract drilling. Contract Drilling Contract Drilling [Member] Impairment charge, Pretax Asset Impairment Charges Impairment charge, Net Asset Impairment Charge After Tax Charges pretax. Charges tax. Investment in joint venture. Investment in joint venture. Investment In Joint Venture [Table] Investment In Joint Venture [Table] Gain on formation of one subsea joint venture. Gain on formation of OneSubsea joint venture Gain On Formation Of One Subsea Joint Venture [Member] Impairment of equity method investments. Impairment of equity-method investments Impairment Of Equity Method Investments [Member] Currency devaluation loss in Venezuela. Currency devaluation loss in Venezuela Currency Devaluation Loss In Venezuela [Member] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Gain on formation of onesubsea. Gain on formation of OneSubsea Gain On Formation Of One Subsea [Member] Impairment and other. Impairment And other Impairment And Other [Member] Investment In Joint Venture [Line Items] Investment In Joint Venture [Line Items] Charges, Pretax Charges Pretax Charges, Tax Charges Tax Charges, Net Amount of dilutive securities assumed exercise of stock option. Amount of dilutive securities unvested restricted stock. Earnings Per Share [Abstract] Earnings Per Share [Abstract] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Basic Assumed exercise of stock options Amount Of Dilutive Securities Assumed Exercise Of Stock Option Unvested restricted stock Amount Of Dilutive Securities Unvested Restricted Stock Diluted Net Income Loss Available To Common Stockholders Diluted Assumed exercise of stock options Incremental Common Shares Attributable To Call Options And Warrants Unvested restricted stock Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends Diluted Earnings per Share from Continuing Operations Earnings Per Share Basic And Diluted [Abstract] Basic Diluted Antidilutive Securities Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis] Antidilutive Securities, Name Antidilutive Securities Name [Domain] Stock Compensation Plan Stock Compensation Plan [Member] Employee stock options to purchase Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Ownership interest in joint venture. Business Combinations [Abstract] Business Combinations [Abstract] Schedule Of Business Acquisitions By Acquisition [Table] Schedule Of Business Acquisitions By Acquisition [Table] One Subsea. One Subsea One Subsea [Member] Segments Statement Business Segments [Axis] Segments Segment [Domain] Parent Company Parent Company [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Purchase price Payments To Acquire Interest In Joint Venture Ownership interest in joint venture Ownership Interest In Joint Venture Acquisitions and investments, net of cash acquired Payments To Acquire Businesses And Interest In Affiliates Shares of common stock issued in connection with acquisition Business Acquisition Equity Interests Issued Or Issuable Number Of Shares Issued Value of common stock issued in connection with acquisition Business Acquisition Equity Interest Issued Or Issuable Value Assigned Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Inventory Current [Table] Inventory Current [Table] Inventory [Line Items] Inventory [Line Items] Raw materials & field materials Inventory Raw Materials And Supplies Work in process Inventory Work In Process Finished goods Inventory Finished Goods Inventories Property Plant And Equipment [Abstract] Property Plant And Equipment [Abstract] Schedule Of Property Plant And Equipment [Table] Schedule Of Property Plant And Equipment [Table] Property Plant And Equipment [Line Items] Property Plant And Equipment [Line Items] Property, plant & equipment Property Plant And Equipment Gross Less: Accumulated depreciation Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Fixed assets less accumulated depreciation Depreciation expense relating to fixed assets Depreciation Multiclient seismic data, capitalized in period. Multiclient seismic data, charged to cost of goods sold and services. Disclosure Multiclient Seismic Data Multiclient Seismic Data Table Detail [Abstract] Disclosure Multiclient Seismic Data Multiclient Seismic Data Table Detail [Abstract] Multiclient seismic data. Multiclient Seismic Data [Table] Multiclient Seismic Data [Table] Disclosure Multiclient Seismic Data Multiclient Seismic Data Table Detail [Line Items] Disclosure Multiclient Seismic Data Multiclient Seismic Data Table Detail [Line Items] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill And Intangible Assets Disclosure [Abstract] Opening balance Capitalized in period Multiclient Seismic Data Capitalized In Period Charged to expense Multiclient Seismic Data Charged To Cost Of Goods Sold And Services Ending balance Schedule Of Goodwill [Table] Schedule Of Goodwill [Table] Reservoir characterization. Reservoir Characterization Reservoir Characterization [Member] Drilling. Drilling Drilling [Member] Reservoir production. Production Reservoir Production [Member] Goodwill [Line Items] Goodwill [Line Items] Goodwill, Beginning Balance Acquisitions Goodwill Acquired During Period Reallocation Goodwill Purchase Accounting Adjustments Impact of changes in exchange rates Goodwill Translation And Purchase Accounting Adjustments Goodwill, Ending Balance Intangible assets by major class. Schedule of intangible assets by major class. Schedule Of Intangible Assets By Major Class [Table] Schedule Of Intangible Assets By Major Class [Table] Finite-Lived Intangible Assets by Major Class Finite Lived Intangible Assets By Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name Finite Lived Intangible Assets Major Class Name [Domain] Technology/Technical Know-How Developed Technology Rights [Member] Tradenames Trade Names [Member] Customer Relationships Customer Relationships [Member] Other Other Intangible Assets [Member] Intangible Assets By Major Class [Line Items] Intangible Assets By Major Class [Line Items] Gross Book Value Intangible Assets Gross Excluding Goodwill Accumulated Amortization Finite Lived Intangible Assets Accumulated Amortization Net Book Value Schedule Of Finite Lived Intangible Assets [Table] Schedule Of Finite Lived Intangible Assets [Table] Finite Lived Intangible Assets [Line Items] Finite Lived Intangible Assets [Line Items] Amortization expenses Amortization Of Intangible Assets Finite lived intangible assets amortization expense year six. Weighted average amortization period for all intangible assets (years) Finite Lived Intangible Asset Useful Life Estimated amortization charged to income, 2014 Finite Lived Intangible Assets Amortization Expense Next Twelve Months Estimated amortization charged to income, 2015 Finite Lived Intangible Assets Amortization Expense Year Two Estimated amortization charged to income, 2016 Finite Lived Intangible Assets Amortization Expense Year Three Estimated amortization charged to income, 2017 Finite Lived Intangible Assets Amortization Expense Year Four Estimated amortization charged to income, 2018 Finite Lived Intangible Assets Amortization Expense Year Five Estimated amortization charged to income, 2019 Finite Lived Intangible Assets Amortization Expense Year Six Debt Disclosure [Abstract] Proforma debt instrument. Debt Disclosure [Abstract] Proforma Debt Instrument Proforma Debt Instrument [Table] Proforma Debt Instrument [Table] Long-term Debt, Type Longterm Debt Type [Axis] Long-term Debt, Type Longterm Debt Type [Domain] Debt, other. Other Debt Other [Member] Debt Instrument Debt Instrument [Axis] Debt Instrument, Name Debt Instrument Name [Domain] Three point three zero percent senior notes due two thousand twenty one. 3.30% Senior Notes due 2021 Three Point Three Zero Percent Senior Notes Due Two Thousand Twenty One [Member] Three point six five percent senior notes due two thousand twenty three. 3.65% Senior Notes due 2023 Three Point Six Five Percent Senior Notes Due Two Thousand Twenty Three [Member] Guaranteed notes two point seven five percent due two thousand fifteen. 2.75% Guaranteed Notes due 2015 Guaranteed Notes Two Point Seven Five Percent Due Two Thousand Fifteen [Member] One point nine five percent senior notes due two thousand sixteen. 1.95% Senior Notes due 2016 One Point Nine Five Percent Senior Notes Due Two Thousand Sixteen [Member] Senior Notes Four Point Two Zero Percent Due Two Thousand Twenty One Member. 4.20% Senior Notes due 2021 Senior Notes Four Point Two Zero Percent Due Two Thousand Twenty One [Member] Senior notes one point two five percent due two thousand and seventeen. 1.25% Senior Notes due 2017 Senior Notes One Point Two Five Percent Due Two Thousand And Seventeen [Member] Senior notes two point four zero percent due two thousand and twenty two. 2.40% Senior Notes due 2022 Senior Notes Two Point Four Zero Percent Due Two Thousand And Twenty Two [Member] Guaranteed notes one point five zero percent due two thousand nineteen. 1.50% Guaranteed Notes due 2019 Guaranteed Notes One Point Five Zero Percent Due Two Thousand Nineteen [Member] Senior Notes Two Point Six Five Percent Due Two Thousand Sixteen Member. 2.65% Senior Notes due 2016 Senior Notes Two Point Six Five Percent Due Two Thousand Sixteen [Member] Commercial paper borrowings. Commercial Paper Borrowings Commercial Paper Borrowings [Member] Proforma Debt Instrument [Line Items] Proforma Debt Instrument [Line Items] Long-term debt, carrying amount Debt Instrument Carrying Amount Debt instrument maturity. Debt instrument interest rate Debt Instrument Interest Rate Stated Percentage Debt instrument maturity date Debt Instrument Maturity Long-term debt, fair value Debt Instrument Fair Value Commercial Paper Commercial Paper [Member] Balance Sheet Location Balance Sheet Location [Axis] Balance Sheet Location Balance Sheet Location [Domain] Long-term debt current portion Short Term Debt [Member] Committed debt facility agreement aggregated Line Of Credit Facility Maximum Borrowing Capacity Number of countries in which company conducts business. Derivative Instruments And Hedging Activities Disclosure [Abstract] Derivative Instruments And Hedging Activities Disclosure [Abstract] Derivative [Table] Derivative [Table] Derivative [Line Items] Derivative [Line Items] Number of countries in which Schlumberger conducts business Number Of Countries In Which Company Conducts Business Recognized a cumulative net gain in equity relating to revaluation of foreign currency forward contracts and foreign currency options designated as cash flow hedges Foreign Currency Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months Derivative Instrument Derivative Instrument Risk [Axis] Derivative Contract Derivative Contract Type [Domain] Foreign exchange contracts Foreign Exchange Contract [Member] Derivative, by Nature Derivative By Nature [Axis] Derivative, Name Derivative Name [Domain] Debt Debt [Member] Hedging Designation Hedging Designation [Axis] Hedging Designation Hedging Designation [Domain] Derivatives designated as hedging instruments. Derivatives designated as hedges Derivatives Designated As Hedging Instruments [Member] Notional amount of interest rate swap Derivative Notional Amount Floating interest rate on securities. Fixed rate debt. Fixed Rate Debt Fixed Rate Debt [Member] Floating rate debt. Floating Rate Debt Floating Rate Debt [Member] Guaranteed notes face amount Debt Instrument Face Amount Derivative swap interest rate Derivative Swaption Interest Rate Senior note floating interest rate Floating Interest Rate On Securities Basis points Debt Instrument Basis Spread On Variable Rate1 Fixed rate debt. Variable rate debt. Fixed rate debt aggregate, after taking into account the effects of the interest rate swaps Fixed Rate Debt Variable rate debt aggregate, after taking into account the effects of the interest rate swaps Variable Rate Debt Short-term investments and Fixed income investments, held to maturity Marketable Securities Current Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table] Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table] Derivatives designated as hedges Designated As Hedging Instrument [Member] Derivatives not designated as hedges Nondesignated [Member] Interest rate swaps Interest Rate Contract [Member] Other current assets Other Current Assets [Member] Other Assets Other Assets [Member] Accounts payable and accrued liabilities Accounts Payable And Accrued Liabilities [Member] Other Liabilities Other Liabilities [Member] Derivatives Fair Value [Line Items] Derivatives Fair Value [Line Items] Derivative Assets Derivative Asset Fair Value Net [Abstract] Derivative Assets Derivative Fair Value Of Derivative Asset Derivative Assets Derivative Instruments Gain Loss Reclassified From Accumulated O C I Into Income Effective Portion Net Derivative Liabilities Derivative Liability Fair Value Net [Abstract] Derivative Liabilities Derivative Fair Value Of Derivative Liability Derivative Instruments Gain Loss By Hedging Relationship By Income Statement Location By Derivative Instrument Risk [Table] Derivative Instruments Gain Loss By Hedging Relationship By Income Statement Location By Derivative Instrument Risk [Table] Hedging Relationship Derivative Instruments Gain Loss By Hedging Relationship [Axis] Hedging Relationship Hedging Relationship [Domain] Derivatives designated as fair value hedges Fair Value Hedging [Member] Interest expense Interest Expense [Member] Cost of revenue. Cost of revenue Cost Of Revenue [Member] Derivative Instruments Gain Loss [Line Items] Derivative Instruments Gain Loss [Line Items] Gain (Loss) Recognized in Income Derivative Gain Loss On Derivative Net Research & engineering Research And Development Expense [Member] Gain (Loss) Reclassified from Accumulated OCL into Income Gain (Loss) Recognized in Accumulated OCL Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net The portion of earnings (loss) from continuing operations before income taxes that is attributable to domestic country operations. The portion of earnings (loss) from continuing operations before income taxes that is attributable to foreign operations, which is defined as income (loss) generated from operations located outside the foreign country. Income loss from continuing operations before income taxes and minority interest. Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Income Tax Disclosure Income Tax Disclosure [Table] Income Tax Disclosure [Table] Disclosure Income Tax Income Tax Disclosure Table Detail [Line Items] Disclosure Income Tax Income Tax Disclosure Table Detail [Line Items] United States Income Loss From Continuing Operations Before Income Taxes Domestic Country Outside United States Income Loss From Continuing Operations Before Income Taxes Foreign Country Income (loss) from continuing operations before income taxes and minority interest, Total Income Loss From Continuing Operations Before Income Taxes And Minority Interest Income Tax Examination [Table] Income Tax Examination [Table] Income Tax Authority Income Tax Authority [Axis] Income Tax Authority Income Tax Authority [Domain] Domestic Country Domestic Country [Member] Foreign Country Foreign Country [Member] Income Tax Examination [Line Items] Income Tax Examination [Line Items] Pretax provision relating to accounts receivable Disclosure Income Tax Components Of Net Deferred Tax Assets Detail [Line Items] Disclosure Income Tax Components Of Net Deferred Tax Assets Detail [Line Items] Postretirement benefits Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits Intangible assets Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets Investments in non-US subsidiaries Deferred Tax Liabilities Investment In Noncontrolled Affiliates Other, net Deferred Tax Assets Other Net deferred tax assets Deferred Tax Assets Net Deferred tax assets, valuation allowances relating to net operating losses in certain countries Deferred Tax Assets Operating Loss Carryforwards Domestic Components of deferred income taxes. Disclosure Income Tax Components Of Consolidated Income Taxes Detail [Line Items] Disclosure Income Tax Components Of Consolidated Income Taxes Detail [Line Items] Current: Current Income Tax Expense Benefit Continuing Operations [Abstract] United States — Federal Current Federal Tax Expense Benefit United States — State Current State And Local Tax Expense Benefit Outside United States Current Foreign Tax Expense Benefit Current Income Tax Expense (Benefit), Total Current Income Tax Expense Benefit Deferred: Deferred Income Tax Expense Benefit Continuing Operations [Abstract] United States — Federal Deferred Federal Income Tax Expense Benefit United States — State Deferred State And Local Income Tax Expense Benefit Outside United States Deferred Foreign Income Tax Expense Benefit Valuation allowance Valuation Allowance Deferred Tax Asset Change In Amount Deferred income taxes Components Of Deferred Income Taxes Consolidated taxes on income The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate shall be the regular tax rate if there are alternative tax systems. US federal statutory rate Effective Income Tax Rate Reconciliation At Domestic Federal Statutory Income Tax Rate Disclosure Income Tax Reconciliation Of U S Statutory Federal Tax Rate Detail [Line Items] Disclosure Income Tax Reconciliation Of U S Statutory Federal Tax Rate Detail [Line Items] US state income taxes Effective Income Tax Rate Reconciliation State And Local Income Taxes Non-US income taxed at different rates Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential Charges and credits (See Note 2) Effective Income Tax Rate Reconciliation Nondeductible Expense Other Effective Income Tax Rate Reconciliation Other Adjustments Effective income tax rate Effective Income Tax Rate Continuing Operations Commitments And Contingencies Disclosure [Abstract] Commitments And Contingencies Disclosure [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Charge recorded within loss from discontinued operations Segment Reporting [Abstract] Segment Reporting [Abstract] Schedule Of Segment Reporting Information By Segment [Table] Schedule Of Segment Reporting Information By Segment [Table] Consolidation Items Consolidation Items [Axis] Consolidation Items Consolidation Items [Domain] Operating Segments Operating Segments [Member] Eliminations and other. Eliminations & other Eliminations And Other [Member] Pretax operating income. Pretax operating income Pretax Operating Income [Member] Corporate & other Corporate Non Segment [Member] Interest income Interest Income [Member] Charges and credits. Charges & credits Charges And Credits [Member] Production. Production Production [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Income before taxes Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Interest income. Interest income excluded from segment Information. Interest Income Excluded From Segment Information Interest Income Excluded From Segment Information [Member] Interest income included in the segment results Interest Income Interest expense excluded from segment information. Interest Expense Excluded From Segment Information Interest Expense Excluded From Segment Information [Member] Interest expense included in the segment results Defined benefit plan net periodic benefit cost before curtailments. Compensation And Retirement Disclosure [Abstract] Compensation And Retirement Disclosure [Abstract] Schedule Of Defined Benefit Plans Disclosures [Table] Schedule Of Defined Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Defined Benefit Plans Disclosures Defined Benefit Plans [Axis] Defined Benefit Plan and Other Postretirement Benefit Plan Defined Benefit Plans [Domain] US Plan Assets United States Pension Plans Of U S Entity Defined Benefit [Member] International Foreign Pension Plans Defined Benefit [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Service cost — benefits earned during period Defined Benefit Plan Service Cost Interest cost on projected benefit obligation Defined Benefit Plan Interest Cost Expected return on plan assets Defined Benefit Plan Expected Return On Plan Assets Amortization of prior service cost Defined Benefit Plan Amortization Of Prior Service Cost Credit Amortization of net loss Defined Benefit Plan Amortization Of Gains Losses Total pension cost Defined Benefit Plan Net Periodic Benefit Cost Before Curtailments Postretirement medical plan. Postretirement medical plan Postretirement Medical Plan [Member] Accumulated Other Comprehensive Income Loss Tax Accumulated other comprehensive income loss. Accumulated Other Comprehensive Income Loss [Abstract] Accumulated Other Comprehensive Income Loss [Abstract] Accumulated Other Comprehensive Income Loss [Table] Accumulated Other Comprehensive Income Loss [Table] Currency Translation Adjustments Accumulated Translation Adjustment [Member] Fair Value of Derivatives Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member] Pension and Other Postretirement Benefit Plans Accumulated Defined Benefit Plans Adjustment [Member] Unrealized Gains Marketable Securities Accumulated Net Unrealized Investment Gain Loss [Member] Accumulated Other Comprehensive Income Loss [Line Items] Accumulated Other Comprehensive Income Loss [Line Items] Balance Other comprehensive income (loss) before reclassifications Other Comprehensive Income Loss Before Reclassifications Net Of Tax Amounts reclassified from accumulated other comprehensive loss Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax Income taxes Accumulated Other Comprehensive Income Loss Tax Net other comprehensive income (loss) Other Comprehensive Income Loss Net Of Tax Balance Discontinued Operations And Disposal Groups [Abstract] Discontinued Operations And Disposal Groups [Abstract] Discontinued Operations And Disposal Groups Discontinued Operations And Disposal Groups [Table] Discontinued Operations And Disposal Groups [Table] Disclosure Discontinued Operations Discontinued Operations Detail [Line Items] Disclosure Discontinued Operations Discontinued Operations Detail [Line Items] Revenue Disposal Group Including Discontinued Operation Revenue Loss before taxes Discontinued Operation Income Loss From Discontinued Operation Before Income Tax Tax expense Discontinued Operation Tax Effect Of Discontinued Operation Loss from discontinued operations