Document Transition Report Document Transition Report Geographical [Axis] Geographical Noncontrolling Interest [Member] Noncontrolling Interest [Member] Other Liabilities, Noncurrent, Total Other Liabilities, Noncurrent Other long-term liabilities Schedule of Segment Reporting Information, by Segment [Table] Schedule Of Segment Reporting Information By Segment [Table] Prepaid and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Accumulated other comprehensive income loss change. Accumulated Other Comprehensive Income Loss Change Policy [Text Block] Accumulated Other Comprehensive Income (Loss) Property, Plant and Equipment, Useful Life Property plant and equipment estimated useful lives Revenue from Contract with Customer, Excluding Assessed Tax, Total Revenue from Contract with Customer, Excluding Assessed Tax Revenue Total revenue Payments to Acquire Businesses, Net of Cash Acquired, Total Payments to Acquire Businesses, Net of Cash Acquired Business acquisitions, net of cash acquired Contract with Customer, Liability, Current Contract liabilities Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Summary of Purchase Price Allocation Title of Individual [Domain] Title of Individual Subsequent Event Subsequent Events [Text Block] Goodwill, Acquired During Period Goodwill Operating Lease, Liability, Noncurrent Long-term operating lease liabilities Schedule of Stock by Class [Table] Net income attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Net Income (Loss) Attributable to Noncontrolling Interest, Total Casualty insurance expiration month and year. Casualty Insurance Expiration Month And Year Casualty insurance, expiration month and year Class of Stock [Line Items] Balance Sheet Location [Axis] Balance Sheet Location Current assets Assets, Current Total current assets Liabilities and Equity Total liabilities and stockholders' equity Entity Address, State or Province Entity Address, State or Province Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative Financial Instruments Nature of operations. Nature Of Operations Policy [Text Block] Nature of Operations Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income attributable to NOW Inc Inventory Disclosure [Text Block] Inventory, net Trading Symbol Trading Symbol Land and Building [Member] Buildings and Land [Member] Common Stock, Shares, Issued, Total Common Stock, Shares, Issued Common stock, shares issued Prepaid Expense and Other Assets, Current Prepaid and other current assets Consolidated Entities [Domain] Schedule of Long-Term Debt Instruments [Table] Debt Instrument [Table] Shares, Outstanding Ending balance, shares Beginning balance, shares AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) [Member] Business Combination Disclosure [Text Block] Acquisitions Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Net current-period other comprehensive income Net current-period other comprehensive income Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent, Total Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Foreign currency translation adjustments Minimum amount of credit facility required to maintain coverage ratio. Minimum Amount Of Credit Facility Required To Maintain Coverage Ratio Minimum amount of credit facility required to maintain coverage ratio Entity Address, City or Town Entity Address, City or Town Debt Disclosure [Text Block] Debt Property, Plant and Equipment [Table Text Block] Summary of Property, Plant and Equipment Performance base restricted stock. Performance Base Restricted Stock [Member] Performance-base restricted stock [Member] Additional Paid-in Capital [Member] Additional Paid-In Capital [Member] Property, Plant, and Equipment, Useful Life, Term, Description [Extensible Enumeration] Liabilities, Current [Abstract] Current liabilities: Assets, Current [Abstract] Current assets: Preferred Stock, Par or Stated Value Per Share Preferred stock, par value Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Amounts reclassified from accumulated other comprehensive income (loss) Reclassification of foreign currency translation adjustments Statement of Stockholders' Equity [Abstract] Number of geographic markets. Number Of Geographic Markets Number of geographical area covered Operating Lease, Liability, Current Current portion of operating lease liabilities Line of Credit Facility, Initiation Date Agreement date Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net Property, plant and equipment, net Property, plant and equipment, net Statement of Comprehensive Income [Abstract] Entity Central Index Key Entity Central Index Key CANADA Canada [Member] Amortization period of revenue recognized. Amortization Period Of Revenue Recognized Amortization period of revenue recognized Preferred Stock, Shares Outstanding, Ending Balance Preferred Stock, Shares Outstanding, Beginning Balance Preferred Stock, Shares Outstanding Preferred stock, shares outstanding Middle East Member Middle East [Member] Current liabilities Liabilities, Current Total current liabilities Entity Tax Identification Number Entity Tax Identification Number Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income before income taxes Senior management employees. Senior Management Employees [Member] Senior Management Employees [Member] Change in operating assets and liabilities, net of effects of acquisitions: Increase (Decrease) in Operating Capital [Abstract] Line of Credit Facility, Description Description of line of credit Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table] Construction in Progress [Member] Construction in Progress [Member] Restricted Stock [Member] Restricted Stock Awards [Member] Geographical [Domain] Geographical Assets Total assets UNITED STATES U.S. [Member] United States [Member] Senior secured revolving credit facility commitment. Senior Secured Revolving Credit Facility Commitment Senior secured revolving credit facility commitment Entity Registrant Name Entity Registrant Name Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Total Retained Earnings (Accumulated Deficit) Accumulated deficit Retained Earnings [Member] Retained Earnings (Deficit) [Member] Total stockholders' equity Ending balance Beginning balance Equity, Including Portion Attributable to Noncontrolling Interest Deferred Income Tax Liabilities, Net Deferred income taxes Operating Income (Loss) [Abstract] Operating profit (loss): Minimum [Member] Minimum [Member] Derivative Instruments and Hedging Activities Disclosure [Abstract] Equity Component [Domain] Equity Component Land [Member] Land [Member] Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by (used in) operating activities: Debt Disclosure [Abstract] Entity Current Reporting Status Entity Current Reporting Status Common Stock, Shares Authorized Common stock, shares authorized Number of shares authorized to purchase Stock Repurchase Program, Authorized Amount Assets [Abstract] ASSETS Revenue from Contract with Customer [Policy Text Block] Revenue Recognition Common stock - par value $0.01; 330 million shares authorized; 106,329,287 and 110,369,266 shares issued and outstanding at September 30, 2023 and December 31, 2022, respectively Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Total Common Stock, Value, Issued Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Accrued Liabilities Percentage of excise tax on share repurchases Percentage of Excise Tax on Share Repurchases Percentage of excise tax on share repurchases Accrued Liabilities, Current Accrued liabilities Total Current Fiscal Year End Date Current Fiscal Year End Date Share-Based Payment Arrangement, Noncash Expense, Total Share-Based Payment Arrangement, Noncash Expense Stock-based compensation Operating profit Operating Income (Loss) Total operating profit (loss) Income tax provision Income Tax Expense (Benefit), Total Income Tax Expense (Benefit) Performance based restricted stock awards performance goal period. Performance Based Restricted Stock Awards Performance Goal Period Performance based restricted stock awards goals over performance period Share-Based Payment Arrangement, Expense Stock-based compensation expense Disaggregation of Revenue [Table] Disaggregation Of Revenue [Table] Equipment [Member] Operating Equipment [Member] Finite-Lived Intangible Assets, Net, Ending Balance Finite-Lived Intangible Assets, Net, Beginning Balance Finite-Lived Intangible Assets, Net, Total Finite-Lived Intangible Assets, Net Intangibles, net Schedule of Segment Reporting Information, by Segment [Table Text Block] Summary of Operating Results by Reportable Segment Revenue from Contract with Customer [Text Block] Revenue Other income (expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense), Total Minimum amount of credit facility required to maintain coverage ratio percentage. Minimum Amount Of Credit Facility Required To Maintain Coverage Ratio Percentage Minimum amount of credit facility required to maintain coverage ratio percentage Comprehensive income attributable to noncontrolling interest Comprehensive income attributable to noncontrolling interest Comprehensive income(loss) attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Line of credit amount unused expressed as a percentage. Line Of Credit Unused Capacity Percentage Line Of credit Unused Capacity Percentage Operating Expenses [Abstract] Operating expenses: Property, Plant and Equipment [Abstract] Subsequent Events [Abstract] Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income: Commitments and Contingencies Disclosure [Abstract] Other Assets, Noncurrent, Total Other Assets, Noncurrent Other assets Other Accrued Liabilities, Current Other Stockholders' Equity Equity [Text Block] Line of Credit Facility, Increase (Decrease), Net, Total Line of Credit Facility, Increase (Decrease), Net Increase in aggregate principal amount Equity, Attributable to Parent [Abstract] Stockholders' equity: Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Available Borrowing Capacity Cost of Goods and Services Sold, Total Cost of Goods and Services Sold Cost of products Earnings Per Share [Abstract] Earnings per share attributable to NOW Inc stockholders: Accounting Policies [Abstract] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Revolving Credit Facility [Member] Senior Secured Revolving Credit Facility [Member] Basic Earnings Per Share, Basic, Total Earnings Per Share, Basic Basic Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Components of AOCI Inventory Write-down Provision for inventory Commitments and Contingencies Commitments and contingencies Business Combinations [Abstract] Income Statement [Abstract] Property, Plant and Equipment Disclosure [Text Block] Property, Plant and Equipment, net Statistical Measurement [Domain] Statistical Measurement Net Cash Provided by (Used in) Operating Activities Net cash provided by (used in) operating activities Document Period End Date Document Period End Date Statistical Measurement [Axis] Statistical Measurement Accounts Receivable, Allowance for Credit Loss, Ending Balance Accounts Receivable, Allowance for Credit Loss, Beginning Balance Accounts Receivable, Allowance for Credit Loss Allowance for doubtful accounts receivable Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Diluted Earnings Per Share, Diluted, Total Earnings Per Share, Diluted Diluted Revenue from Contract with Customer [Abstract] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV Increase decrease in accounts payable accrued liabilities and other net. Increase Decrease In Accounts Payable Accrued Liabilities And Other Net Accounts payable, accrued liabilities and other, net Foreign Currency Contracts, Liability, Fair Value Disclosure Foreign currency forward contracts, liability Additional Paid in Capital, Common Stock, Ending Balance Additional Paid in Capital, Common Stock, Beginning Balance Additional Paid in Capital, Common Stock Additional paid-in capital Adjustment to additional paid in capital income tax effect from share based compensation net 1 Adjustment To Additional Paid In Capital Income Tax Effect From Share Based Compensation Net 1 Shares withheld for taxes Foreign Currency Transaction Gain (Loss), before Tax, Total Gain (Loss), Foreign Currency Transaction, before Tax Foreign currency forward contracts, gain (loss) related to changes in fair value Repurchases of common stock Payments for Repurchase of Common Stock Total cost of shares repurchased Noncontrolling interest Equity, Attributable to Noncontrolling Interest Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance Stockholders' Equity Attributable to Noncontrolling Interest, Beginning Balance Stockholders' Equity Attributable to Noncontrolling Interest, Total Liabilities and Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Interactive Data Current Entity Interactive Data Current Line of credit facility interest rate adjustment. Line Of Credit Facility Interest Rate Adjustment Line of credit facility interest rate adjustment Credit Facility [Domain] Credit Facility Equity [Abstract] Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Stock based awards, shares granted Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Derivatives, Fair Value [Line Items] Derivatives Fair Value [Line Items] Equity Components [Axis] Equity Components Increase (Decrease) in Accounts Receivable Receivables Accrual for Taxes Other than Income Taxes, Current Taxes (non-income) Inventory Disclosure [Abstract] Payments to Acquire Businesses, Gross Purchase price consideration in cash Other Expense [Member] Other Expense [Member] Local Phone Number Local Phone Number Property, Plant and Equipment [Line Items] Property Plant And Equipment [Line Items] Inventory Valuation Reserves Less: Inventory reserves Inventory finished goods and other. Inventory Finished Goods And Other Finished goods and other Goodwill, Ending Balance Goodwill, Beginning Balance Goodwill, Total Goodwill Goodwill Statement of Cash Flows [Abstract] Stock Repurchased and Retired During Period, Shares Number of shares repurchased Organization, Consolidation and Presentation of Financial Statements [Abstract] Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income (loss), Ending balance Accumulated other comprehensive income (loss), Beginning balance Accumulated other comprehensive loss Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] International. International [Member] International [Member] Common Stock, Par or Stated Value Per Share Common stock, par value Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Effect of exchange rates on cash and cash equivalents Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Numerator: Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Maximum [Member] Maximum [Member] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Assets and Liabilities Assumed and Recognized Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Organization and Basis of Presentation APIC, Share-based Payment Arrangement, Increase for Cost Recognition, Total APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Stock-based compensation Shares Acquired, Average Cost Per Share Average price per share Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net change in cash and cash equivalents Payables and Accruals [Abstract] Payments for (Proceeds from) Other Investing Activities Other, net Number of Businesses Acquired Number of acquisitions CALIFORNIA Canadian Subsidiaries [Member] Number of vendor distributed countries. Number Of Vendor Distributed Countries Number of countries distribution occur through vendors Schedule of Inventory, Current [Table Text Block] Schedule of Inventory Segment Reporting Disclosure [Text Block] Business Segments City Area Code City Area Code Inventory, Net Inventories, net Inventories, net Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Weighted Average Number of Shares Outstanding, Basic [Abstract] Denominator: Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less: accumulated depreciation Weighted Average Number of Shares Outstanding, Basic, Total Weighted Average Number of Shares Outstanding, Basic Weighted-average common shares outstanding, basic Weighted average basic common shares outstanding Inventory, Work in Process, Gross Work in process Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Statement [Table] Statement [Table] Decrease in contract liabilities Increase in contract liabilities for net customer deposits Increase (Decrease) in Contract with Customer, Liability Document Fiscal Period Focus Document Fiscal Period Focus Not Designated as Hedging Instrument [Member] Derivatives Not Designated as Hedging Instrument [Member] Statement [Line Items] Statement [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive Securities excluded from Computation of Earnings Per Share Letters of Credit Outstanding, Amount Letters of credit Common Stock [Member] Common Stock [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Cash and Cash Equivalents, at Carrying Value, Total Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of period Cash and cash equivalents, beginning of period Cash and cash equivalents Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value of Financial Instruments Loss Contingency Accrual, Ending Balance Loss Contingency Accrual, Beginning Balance Loss Contingency Accrual Contingent liability Cover [Abstract] Receivables, Net [Member] Receivables Net [Member] Receivables, net. Document Fiscal Year Focus Document Fiscal Year Focus Comprehensive Income (Loss) Note [Text Block] Accumulated Other Comprehensive Income (Loss) ("AOCI") Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value, Granted Segment Reporting [Abstract] Security Exchange Name Security Exchange Name Accounts Receivable [Policy Text Block] Receivables Other Comprehensive Income (Loss), before Reclassifications, before Tax Other comprehensive income (loss) before reclassifications Preferred Stock, Shares Issued, Total Preferred Stock, Shares Issued Preferred stock, shares issued Preferred Stock, Shares Authorized Preferred stock, shares authorized Information Technology Assets [Member] Technology Equipment [Member] Property, Plant and Equipment, Gross, Ending Balance Property, Plant and Equipment, Gross, Beginning Balance Property, Plant and Equipment, Gross, Total Property, Plant and Equipment, Gross Property, plant and equipment, gross Hedging Designation [Domain] Hedging Designation Basis of presentation and organization. Basis Of Presentation And Organization [Abstract] Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options Entity Emerging Growth Company Entity Emerging Growth Company Revenue, Remaining Performance Obligation, Provision for Loss [Policy Text Block] Remaining Performance Obligations Amendment Flag Amendment Flag Cumulative shareholder return performance stock awards. Cumulative Shareholder Return Performance Stock Awards [Member] TSR metric [Member] Schedule of Accrued Liabilities [Table Text Block] Summary of Accrued Liabilities Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Variable Rate [Domain] Securities Act File Number Entity File Number Line of credit facility covenant terms fixed charge coverage ratio. Line Of Credit Facility Covenant Terms Fixed Charge Coverage Ratio Fixed charge coverage ratio Line of Credit Facility [Abstract] Cash and cash equivalents, end of period Cash and cash equivalents, beginning of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Total Share-Based Payment Arrangement [Abstract] Common stock retired Common stock retired Treasury Stock, Retired, Cost Method, Amount Contract with customer assets and liabilities. Contract With Customer Assets And Liabilities Policy [Text Block] Contract Assets and Liabilities Accounts Payable, Current, Total Accounts Payable, Current Accounts payable Variable Interest Entities ("VIE") Variable Interest Entity, Primary Beneficiary [Member] Interest in one VIE Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage Preferred Stock, Value, Issued, Ending Balance Preferred Stock, Value, Issued, Beginning Balance Preferred Stock, Value, Issued, Total Preferred Stock, Value, Issued Preferred stock - par value $0.01; 20 million shares authorized; no shares issued and outstanding Entity Small Business Entity Small Business Entity Shell Company Entity Shell Company Title of Individual [Axis] Title of Individual Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Unused portion of commitment fee range Restricted stock and restricted stock units. Restricted Stock And Restricted Stock Units [Member] Restricted Stock and Restricted Stock Units [Member] Earnings Per Share [Text Block] Earnings Per Share Revenue: Revenues [Abstract] Entity Address, Address Line One Entity Address, Address Line One Effective tax rate continuing operations. Effective Tax Rate Continuing Operations Effective tax rates Other Liabilities, Current, Total Other Liabilities, Current Other current liabilities Excise tax on share repurchases. Excise Tax on Share Repurchases Excise tax on share repurchases Less: net income attributable to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Undistributed Earnings (Loss) Allocated to Participating Securities, Basic, Total Income Statement Location [Axis] Income Statement Location Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Net income Net income Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Depreciation, Depletion and Amortization, Total Depreciation, Depletion and Amortization Depreciation and amortization Common stock repurchased Common stock repurchased Treasury Stock, Value, Acquired, Cost Method Title of 12(b) Security Title of 12(b) Security Prepaid Expenses and Other Current Assets [Member] Prepaid and Other Current Assets [Member] Treasury Stock, Common [Member] Treasury Stock Common [Member] Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Long-term Line of Credit, Total Long-Term Line of Credit Line of credit facility borrowings Weighted Average Number Diluted Shares Outstanding Adjustment, Total Weighted Average Number of Shares Outstanding, Diluted, Adjustment Effect of dilutive securities Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset Increase (Decrease) in Inventories, Total Increase (Decrease) in Inventories Inventories Contract with Customer, Liability, Total Contract with Customer, Liability Deferred revenue Other Operating Activities, Cash Flow Statement Other, net Property plant and equipment useful life and values. Property Plant And Equipment Useful Life And Values [Abstract] Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding, Beginning Balance Common Stock, Shares, Outstanding Common stock, shares outstanding Share-Based Payment Arrangement [Text Block] Stock-based Compensation and Outstanding Awards Income Statement Location [Domain] Income Statement Location Tabular disclosure of shares repurchased. Schedule of Shares Repurchased [Table Text Block] Schedule of Shares Repurchased Document Type Document Type Net Cash Provided by (Used in) Investing Activities Net cash provided by (used in) investing activities Document Quarterly Report Document Quarterly Report Foreign Currency Contract, Asset, Fair Value Disclosure Foreign currency forward contracts, assets Derivative, Notional Amount Foreign currency forward contracts, notional amount Net income (loss) attributable to the Company's stockholders Net Income (Loss) Available to Common Stockholders, Basic Net income attributable to NOW Inc. stockholders Inventory, Gross Total inventory Total inventory Less: Inventory reserves Net Cash Provided by (Used in) Financing Activities Net cash provided by (used in) financing activities Entity Filer Category Entity Filer Category Balance Sheet Location [Domain] Balance Sheet Location Variable Rate [Axis] Liabilities Total liabilities Property, Plant and Equipment [Table] Schedule Of Property Plant And Equipment [Table] Asset Impairment Charges, Total Asset Impairment Charges Impairment and other charges Other Current Liabilities [Member] Other Current Liabilities [Member] Stockholders' Equity Attributable to Parent, Ending Balance Stockholders' Equity Attributable to Parent, Beginning Balance Equity, Attributable to Parent NOW Inc. stockholders' equity Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Secured Overnight Financing Rate Sofr Overnight Index Swap Rate Payments relating to finance leases and other net. Payments Relating To Finance Leases And Other Net Payments relating to finance leases and other, net Consolidated Entities [Axis] Net income attributable to NOW Inc Net income attributable to NOW Inc. Contract Assets Contract with Customer, Asset, after Allowance for Credit Loss, Current Contract with Customer, Asset, after Allowance for Credit Loss, Current, Total Statement of Financial Position [Abstract] Recently issued accounting standards. Recently Issued Accounting Standards Policy [Text Block] Recently Issued Accounting Standards Weighted Average Number of Shares Outstanding, Diluted Weighted-average common shares outstanding, diluted Weighted average diluted common shares outstanding Credit Facility [Axis] Credit Facility Use of Estimates, Policy [Policy Text Block] Use of Estimates Income Tax Disclosure [Text Block] Income Taxes The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses excluding Impairment charges. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Warehousing Selling And Administrative Expense Warehousing, selling and administrative Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Computation of Basic and Diluted Earnings Per Share Disaggregation of Revenue [Line Items] Disaggregation Of Revenue [Line Items] Receivables, Net, Current, Total Receivables, Net, Current Receivables, net Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV Hedging Designation [Axis] Hedging Designation Payments to Acquire Property, Plant, and Equipment, Total Payments to Acquire Property, Plant, and Equipment Purchases of property, plant and equipment Reclassification, Comparability Adjustment [Policy Text Block] Reclassification Employee-related Liabilities, Current, Total Employee-related Liabilities, Current Compensation and other related expenses Income Tax Disclosure [Abstract]