Entity Central Index Key Cover [Abstract] 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 Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current 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 Entity Shell Company Entity Shell Company Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity File Number Entity File Number Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address Address Line1 Entity Address, City or Town Entity Address City Or Town Entity Address, State or Province Entity Address State Or Province Entity Incorporation, State or Country Code Entity Incorporation State Country Code Entity Address, Country Entity Address Country Entity Address, Postal Zip Code Entity Address Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Document Quarterly Report Document Quarterly Report Document Transition Report Document Transition Report Title of 12(b) Security Security12b Title Security Exchange Name Security Exchange Name Trading Symbol Trading Symbol 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. Equity method investment other than temporary impairment and foreign currency devaluation loss. Income Statement [Abstract] Statement [Table] Statement [Table] Product and Service Product Or Service [Axis] Product and Service Products And Services [Domain] Services Service [Member] Product Product [Member] Statement [Line Items] Statement [Line Items] Revenue Revenues [Abstract] Total Revenue Revenue From Contract With Customer Excluding Assessed Tax Interest & other income Interest Income And Other Expenses Costs And Expenses [Abstract] Cost of services and sales Cost Of Goods And Services Sold Research & engineering Research And Development Expense General & administrative General And Administrative Expense Impairments & other Equity Method Investment Other Than Temporary Impairment And Foreign Currency Devaluation Loss Interest Interest Expense Income (loss) before taxes Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Tax expense (benefit) Income Tax Expense Benefit Net income (loss) Profit Loss Net income attributable to noncontrolling interests Net Income Loss Attributable To Noncontrolling Interest Net income (loss) attributable to Schlumberger Net Income Loss Basic earnings (loss) per share of Schlumberger Earnings Per Share Basic Diluted earnings (loss) per share of Schlumberger 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 Statement Of Income And Comprehensive Income [Abstract] Net income (loss) 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 Adjustment Net Of Tax Portion Attributable To Parent Cash flow hedges Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Period Increase Decrease [Abstract] Net loss on cash flow hedges Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax Reclassification to net income (loss) of net realized loss 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] Amortization to net income (loss) of net actuarial loss Other Comprehensive Income Loss Reclassification Adjustment From A O C I Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax Amortization to net income (loss) of net prior service credit 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 Tax Comprehensive income (loss) 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 (loss) 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. Short term borrowings and long term debt current. 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 (2020 - $249; 2019 - $255) Receivables Net Current Inventories Inventory Net Other current assets Other Assets Current Current assets total Assets Current 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 Finite Lived Intangible Assets Net Deferred Taxes Deferred Tax Assets Net Noncurrent 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 Short-term borrowings and current portion of long-term debt Short Term Borrowings And Long Term Debt Current Dividends payable Dividends Payable Current Current Liabilities Total Liabilities Current Long-term Debt 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 The net cash outflow from capitalized costs directly incurred in acquiring and processing of seismic surveys that are licensed on a nonexclusive basis. Payments for proceeds from investments Statement Of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided By Used In Operating Activities [Abstract] Adjustments to reconcile net income (loss) income to cash provided by operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Impairments and other charges Other Asset Impairment Charges Depreciation and amortization Depreciation Depletion And Amortization Deferred taxes Deferred Income Tax Expense Benefit Stock-based compensation expense Share Based Compensation Earnings of equity method investments, 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] Decrease (increase) in receivables Increase Decrease In Receivables Increase in inventories Increase Decrease In Inventories Decrease (increase) in other current assets Increase Decrease In Other Current Assets (Increase) decrease in other assets Increase Decrease In Other Noncurrent Assets Decrease in accounts payable and accrued liabilities Increase Decrease In Accounts Payable And Accrued Liabilities (Decrease) increase in estimated liability for taxes on income Increase Decrease In Accrued Income Taxes Payable Decrease 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 APS investments Payments To Acquire Investments Multiclient seismic data costs capitalized Payments For Proceeds From Capitalized Costs Support Equipment And Facilities (Purchase) sale of investments, net Payments For Proceeds From Investments1 Net proceeds from asset divestitures Proceeds From Divestiture Of Businesses 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 increase (decrease) in short-term borrowings Proceeds From Repayments Of Short Term Debt Other Proceeds From Payments For Other Financing Activities NET CASH PROVIDED (USED) IN FINANCING ACTIVITIES Net Cash Provided By Used In Financing Activities Net increase (decrease) in cash before translation effect Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect Translation effect on cash Effect Of Exchange Rate On Cash Cash, beginning of period Cash, end of period 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 Balance, shares Shares Outstanding Treasury shares, Balance Treasury Stock Shares 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 Loss Available For Sale Securities Adjustment Net Of Tax Changes in fair value of cash flow hedges Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax Pension and other postretirement benefit plans Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax 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 Vesting of restricted stock, shares Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures Shares issued under employee stock purchase plan Stock Issued During Period Value Employee Stock Purchase Plan Shares issued under employee stock purchase plan, shares Stock Issued During Period Shares Employee Stock Purchase Plans Stock repurchase program Treasury Stock Value Acquired Cost Method Stock repurchase program, shares Treasury Stock Shares Acquired Stock-based compensation expense Stock Issued During Period Value Share Based Compensation Dividends declared Dividends Cash Other Stockholders Equity Other Balance Balance, shares Treasury shares, Balance Dividends declared, per share Common Stock Dividends Per Share Declared Organization Consolidation And Presentation Of Financial Statements [Abstract] Basis of Presentation Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] Restructuring And Related Activities [Abstract] Charges and Credits Restructuring And Related Activities Disclosure [Text Block] Earnings Per Share [Abstract] Earnings (Loss) Per Share Earnings Per Share [Text Block] Inventory Disclosure [Abstract] Inventories Inventory Disclosure [Text Block] Property Plant And Equipment [Abstract] 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 [Abstract] Multiclient Seismic Data Multiclient Seismic Data [Text Block] Goodwill And Intangible Assets Disclosure [Abstract] Intangible Assets Intangible Assets Disclosure [Text Block] Debt Disclosure [Abstract] Long-term Debt Long Term Debt [Text Block] Derivative Instruments And Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Derivative Instruments And Hedging Activities Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Contingencies Loss Contingency Disclosures Segment Reporting [Abstract] Segment Information Segment Reporting Disclosure [Text Block] Compensation And Retirement Disclosure [Abstract] Pension and Other Postretirement Benefit Plans Pension And Other Postretirement Benefits Disclosure [Text Block] Summary of charges and credits. Summary of Charges and Credits Summary Of Charges And Credits Table [Text Block] Reconciliation of Earnings (loss) Per Share 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] Summary of Inventory Schedule Of Inventory Current Table [Text Block] Summary of Fixed Assets Property Plant And Equipment [Text Block] Disclosure of the carrying amount of multiclient seismic data based on completed and in-process seismic surveys. Change in Carrying Amount of Multiclient Seismic Data Multiclient Seismic Data Table [Text Block] Schedule of Intangible Assets by Major Class Schedule Of Finite Lived Intangible Assets Table [Text Block] Summary of Long-term Debt Schedule Of Debt Instruments [Text Block] Effect of Derivative Instruments Designated as Fair Value and Cash Flow Hedges and Not Designated as Hedges on Consolidated Statement of (Loss) Income Schedule Of Derivative Instruments Gain Loss In Statement Of Financial Performance [Text Block] Schedule of Segment Reporting Information, by Segment Schedule Of Segment Reporting Information By Segment [Text Block] Revenue by Geographic Area Reconciliation Of Revenue From Segments To Consolidated [Text Block] Summary of geographical segment revenue disaggregated by segment. Summary of North America and International Revenue Disaggregated by Segment Summary Of Geographical Segment Revenue Disaggregated By Segment Table [Text Block] Net Pension Cost (Credit) for Schlumberger Pension Plans and US Postretirement Medical Plan Schedule Of Net Benefit Costs Table [Text Block] Charges and credits pretax. Charges and credits tax. Charges and credits. Charges and credits. Charges and credits. Charges And Credits [Table] Charges And Credits [Table] Restructuring Type Restructuring Cost And Reserve [Axis] Type of Restructuring Type Of Restructuring [Domain] Goodwill Goodwill [Member] Intangible assets. Intangible Assets Intangible Assets [Member] APS investments. APS investments A P S Investments [Member] North America pressure pumping asset impairments. North America pressure pumping asset impairments North America Pressure Pumping Asset Impairments [Member] Severance Employee Severance [Member] Other assets impairment. Other Other Assets Impairment [Member] Valuation allowance. Valuation allowance Valuation Allowance [Member] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Impairment and other. Impairment and Other Impairment And Other [Member] Charges And Credits [Line Items] Charges And Credits [Line Items] Charges and credits, Pretax Charges And Credits Pretax Charges and credits, Tax Charges And Credits Tax Charges and credits, Net Charges And Credits Reporting Unit Reporting Unit [Axis] Reporting Unit Reporting Unit [Domain] Four reporting units. Four Reporting Units [Member] Four Reporting Units [Member] Seven Reporting Units. Seven Reporting Units [Member] Seven Reporting Units [Member] Six reporting units. Six Reporting Units Six Reporting Units [Member] Statistical Measurement Range [Axis] Statistical Measurement Range [Member] Minimum Minimum [Member] Maximum Maximum [Member] Business Acquisition Business Acquisition [Axis] Business Acquisition, Acquiree Business Acquisition Acquiree [Domain] Cameron. Cameron Cameron [Member] Smith International Inc Smith and Geoservices. Smith International Inc Smith Aand Geoservices Smith International Inc Smith Aand Geoservices [Member] Carrying value of impaired intangible asset. Carrying Value Of Impaired Intangible Asset Carrying Value Of Impaired Intangible Asset [Member] Geographical Statement Geographical [Axis] Geographical Segment Geographical [Domain] North America North America [Member] Carrying Value of Asset Production Solutions. Carrying Value Of Asset Production Solutions Carrying Value Of Asset Production Solutions [Member] Severance. Severance Severance [Member] Scenario Statement Scenario [Axis] Scenario Scenario Unspecified [Domain] Scenario Forecast [Member] Scenario Forecast [Member] Other Restructuring Other Restructuring [Member] Total number of reporting units Number Of Reporting Units Goodwill Goodwill Gross Goodwill impairment charge Goodwill And Intangible Asset Impairment Discount rate utilized. Expected increase decrease in discount rate assumption. Number of reporting units fair value to be impacted Expected percentage change in fair value of reporting units. Discount rate utilized Discount Rate Utilized Expected increase/decrease in discount rate assumption Expected Increase Decrease In Discount Rate Assumption Number of reporting units fair value to be impacted Number Of Reporting Units Fair Value To Be Impacted Expected percentage change in fair value of reporting units Expected Percentage Change In Fair Value Of Reporting Units Impairments and other charges. Intangible assets Impairments And Other Charges Charges And Credits Schlumberger Net Income (Loss) Net Income Loss [Abstract] Basic Net Income Loss Available To Common Stockholders Basic Diluted Net Income Loss Available To Common Stockholders Diluted Average Shares Outstanding Unvested restricted stock Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends Diluted Earnings (loss) per Share Earnings Per Share Reconciliation [Abstract] Basic Diluted Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Award Type Award Type [Axis] Award Type Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Employee Stock Options Employee Stock Option [Member] Unvested Restricted Stock Restricted Stock Units R S U [Member] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Raw materials & field materials Inventory Raw Materials And Supplies Work in progress Inventory Work In Process Finished goods Inventory Finished Goods Inventories 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. 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 Finite Lived Intangible Assets [Table] Schedule Of Finite Lived Intangible Assets [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] Customer Relationships Customer Relationships [Member] Technology/Technical Know-How Developed Technology Rights [Member] Tradenames Trade Names [Member] Other Other Intangible Assets [Member] Finite Lived Intangible Assets [Line Items] Finite Lived Intangible Assets [Line Items] Gross Book Value Finite Lived Intangible Assets Gross Accumulated Amortization Finite Lived Intangible Assets Accumulated Amortization Net Book Value Finite lived intangible assets amortization expense year six. Amortization expense Amortization Of Intangible Assets Estimated amortization charged to income, remaining three quarters of 2020 Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year Estimated amortization charged to income, 2021 Finite Lived Intangible Assets Amortization Expense Year Two Estimated amortization charged to income, 2022 Finite Lived Intangible Assets Amortization Expense Year Three Estimated amortization charged to income, 2023 Finite Lived Intangible Assets Amortization Expense Year Four Estimated amortization charged to income, 2024 Finite Lived Intangible Assets Amortization Expense Year Five Estimated amortization charged to income, 2025 Finite Lived Intangible Assets Amortization Expense Year Six Debt Instrument [Table] Debt Instrument [Table] Long-term Debt, Type Longterm Debt Type [Axis] Long-term Debt, Type Longterm Debt Type [Domain] Commercial paper borrowings Commercial Paper [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] Three point nine zero percent senior notes due two thousand twenty eight member. 3.90% Senior Notes due 2028 Three Point Nine Zero Percent Senior Notes Due Two Thousand Twenty Eight [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] Zero point two five percent notes due two thousand twenty seven. 0.25% Notes due 2027 Zero Point Two Five Percent Notes Due Two Thousand Twenty Seven [Member] Zero point five zero percent notes due two thousand thirty one. 0.50% Notes due 2031 Zero Point Five Zero Percent Notes Due Two Thousand Thirty One [Member] Four point zero zero percent notes due two thousand twenty five. 4.00% Senior Notes due 2025 Four Point Zero Zero Percent Notes Due Two Thousand Twenty Five [Member] Four point three zero percent senior notes due two thousand twenty nine member. 4.30% Senior Notes due 2029 Four Point Three Zero Percent Senior Notes Due Two Thousand Twenty Nine [Member] Three point seven zero percent senior notes due two thousand twenty four member. 3.75% Senior Notes due 2024 Three Point Seven Five Percent Senior Notes Due Two Thousand Twenty Four [Member] Guaranteed notes one point zero zero percent due two thousand twenty six member. 1.00% Guaranteed Notes due 2026 Guaranteed Notes One Point Zero Zero Percent Due Two Thousand Twenty Six [Member] Two point six five percent senior notes due two thousand twenty two. 2.65% Senior Notes due 2022 Two Point Six Five Percent Senior Notes Due Two Thousand Twenty Two [Member] Zero point zero zero percent notes due two thousand twenty four. 0.00% Notes due 2024 Zero Point Zero Zero Percent Notes Due Two Thousand Twenty Four [Member] Three point six three percent senior notes due two thousand and twenty two. 3.63% Senior Notes due 2022 Three Point Six Three Percent Senior Notes Due Two Thousand And Twenty Two [Member] Seven point zero zero percent notes due two thousand thirty eight. 7.00% Notes due 2038 Seven Point Zero Zero Percent Notes Due Two Thousand Thirty Eight [Member] Five point nine five percent notes due two thousand forty one. 5.95% Notes due 2041 Five Point Nine Five Percent Notes Due Two Thousand Forty One [Member] Five point one three percent notes due two thousand forty three. 5.13% Notes due 2043 Five Point One Three Percent Notes Due Two Thousand Forty Three [Member] Four point zero zero percent notes due two thousand twenty three. 4.00% Notes due 2023 Four Point Zero Zero Percent Notes Due Two Thousand Twenty Three [Member] Three point seven zero percent notes due two thousand and twenty four. 3.70% Notes due 2024 Three Point Seven Zero Percent Notes Due Two Thousand And Twenty Four [Member] Senior notes four point two zero percent due two thousand twenty one. 4.20% Senior Notes due 2021 Senior Notes Four Point Two Zero Percent Due Two Thousand Twenty One [Member] Debt, other. Other Debt Other [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Long-term debt, carrying amount Debt instrument maturity. Four point zero zero percent senior notes due two thousand twenty five. 4.00% Senior Notes due 2025 Four Point Zero Zero Percent Senior Notes Due Two Thousand Twenty Five [Member] Debt instrument interest rate Debt Instrument Interest Rate Stated Percentage Debt instrument maturity date Debt Instrument Maturity Year Commercial paper programs maturing february two zero two three. Commercial paper programs mature in February 2023 Commercial Paper Programs Maturing February Two Zero Two Three [Member] Commercial paper programs maturing july two zero two four. Commercial paper programs mature in July 2024 Commercial Paper Programs Maturing July Two Zero Two Four [Member] Commercial paper programs maturing february two zero two five. Commercial paper programs mature in February 2025 Commercial Paper Programs Maturing February Two Zero Two Five [Member] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Notes, face amount Debt Instrument Face Amount Long-term debt, fair value Debt Instrument Fair Value Committed credit facility agreement aggregated Line Of Credit Facility Maximum Borrowing Capacity Unused credit facility Line Of Credit Facility Remaining Borrowing Capacity Credit facility withdrawal amount. Credit facility extended period Line Of Credit Facility Expiration Period Credit facility drawn Credit Facility Withdrawal Amount Long-term debt Long Term Debt Fixed rate debt. Variable rate debt. Derivative [Table] Derivative [Table] Derivative Instrument Derivative Instrument Risk [Axis] Derivative Contract Derivative Contract Type [Domain] Cross currency swaps Cross Currency Interest Rate Contract [Member] Two point two zero percent senior notes due two thousand twenty. 2.20% Senior Notes due 2020 Two Point Two Zero Percent Senior Notes Due Two Thousand Twenty [Member] Foreign exchange contracts Foreign Exchange Contract [Member] Financial Instrument Financial Instrument [Axis] Financial Instruments Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain] Debt Debt [Member] Hedging Designation Hedging Designation [Axis] Hedging Designation Hedging Designation [Domain] Derivatives designated as hedges Designated As Hedging Instrument [Member] Derivative [Line Items] Derivative [Line Items] Fixed rate debt aggregate Fixed Rate Debt Variable rate debt aggregate Variable Rate Debt Number of countries in which Schlumberger generates revenue Number Of Countries In Which Entity Operates Denominated debt issued Debt Instrument Carrying Amount Notional amount of interest rate swap Derivative Notional Amount Notes, face amount Derivative swap interest rate Derivative Swaption Interest Rate Promissory note interest rate Recognized a cumulative loss in accumulated other comprehensive loss relating to changes in the fair value of foreign currency forward contracts and cross-currency swaps Foreign Currency Cash Flow Hedge Gain Loss Reclassified To Earnings Net 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] Cash Flow Hedging Cash Flow Hedging [Member] Derivatives not designated as hedges Nondesignated [Member] Cost of services/sales Cost Of Sales [Member] Interest expense Interest Expense [Member] Cost of services/sales Derivative Instruments Gain Loss [Line Items] Derivative Instruments Gain Loss [Line Items] Gain (Loss) Recognized in Income Derivative Gain Loss On Derivative Net 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 & other Material Reconciling Items [Member] Segments Statement Business Segments [Axis] Segments Segment [Domain] Reservoir characterization. Reservoir Characterization Reservoir Characterization [Member] Drilling. Drilling Drilling [Member] Production. Production Production [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Revenue Income (Loss) Before Taxes Corporate and other expenses. Restructuring and other charges. Pretax segment operating income Operating Income Loss Corporate & other Corporate And Other Expenses Interest income Interest Income Operating Interest expense Charges and credits Restructuring And Other Charges Eliminations & other Geography Eliminations [Member] Latin America Latin America [Member] Region of Europe, CIS, and Africa. Europe/CIS/Africa Europe C I S Africa [Member] Middle East & Asia Middle East [Member] International Non Us [Member] Other All Other Segments [Member] Contract with customer liability revenue in excess of billings. Revenue in excess of billings Contract With Customer Liability Revenue In Excess Of Billings Percentage of deferred revenue expected to be recognized within one year. Total backlog Deferred Revenue Percentage of revenue expected to be recognized over next 12 months Percentage Of Deferred Revenue Expected To Be Recognized Within One Year Contract with customer liability revenue in excess of billings and cash collections current. Billings and cash collections in excess of revenue Contract With Customer Liability Revenue In Excess Of Billings And Cash Collections Current Schedule Of Defined Benefit Plans Disclosures [Table] Schedule Of Defined Benefit Plans Disclosures [Table] Retirement Plan Sponsor Location Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location Retirement Plan Sponsor Location [Domain] US Plan Assets Domestic Plan [Member] US UNITED STATES International Foreign Plan [Member] Retirement Plan Type Retirement Plan Type [Axis] Retirement Plan Type Retirement Plan Type [Domain] Postretirement medical plan Defined Benefit Postretirement Health Coverage [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Service cost Defined Benefit Plan Service Cost Interest cost 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 (credit) Defined Benefit Plan Net Periodic Benefit Cost