Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Schedule of Intangible Assets Intangible Asset and Goodwill [Table Text Block] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Net loss attributable to stockholders of common stock, diluted Net Income (Loss) Available to Common Stockholders, Diluted Document Fiscal Year Focus Document Fiscal Year Focus Expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Additional business agreement period (in months) Disposal Group, Including Discontinued Operation, Transitional Services Agreement Period Disposal Group, Including Discontinued Operation, Transitional Services Agreement Period Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Segment Reporting [Abstract] Segment Reporting [Abstract] Schedule of Estimated Future Intangible Asset Amortization Expense Intangible Asset, Finite-Lived, and Capitalized Cost, Software to be Sold, Leased, or Marketed, Estimated Amortization Expense [Table Text Block] Accrued contract losses Accrued Contract Losses Accrued Contract Losses Common stock, par value $0.01 per share, authorized shares of 500,000; issued and outstanding shares of 135,747 and 130,447 at March 31, 2026 and December 31, 2025, respectively Common Stock, Value, Issued Employee tax withholding on stock-based compensation Payment, Tax Withholding, Share-Based Payment Arrangement Accrued employee benefits Employee-related Liabilities, Current Schedule of Long-Term Debt Instruments Schedule of Long-Term Debt Instruments [Table Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance 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Costs Other (expense) income Disposal Group, Including Discontinued Operation, Non Operating Income (Expense) Disposal Group, Including Discontinued Operation, Non Operating Income (Expense) Entity Address, City or Town Entity Address, City or Town Change in fair value Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value, Revaluation Amount Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value, Revaluation Amount Pension liabilities, accrued postretirement benefits and employee benefits Increase (Decrease) In Pension Postretirement And Accrued Employee Benefits Increase (Decrease) In Pension Postretirement And Accrued Employee Benefits Babcock & Wilcox Enterprises, Inc. Babcock & Wilcox Enterprises, Inc. [Member] Babcock & Wilcox Enterprises, Inc. [Member] Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Vested (in shares) Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Basis of presentation Basis of Accounting, Policy [Policy Text Block] Payment of Preferred Stock dividends Payments of Ordinary Dividends, Preferred Stock and Preference Stock Class of Stock [Axis] Class of Stock [Axis] Total intangible assets, net Intangible Asset, Finite-Lived, 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preferred stock (in shares) Ending balance of preferred stock (in shares) Preferred Stock, Shares Outstanding Debt face amount Debt Instrument, Face Amount Contracts in progress Contracts in progress, amount change Increase (Decrease) in Contract with Customer, Asset Basic and diluted loss per share: Earnings Per Share, Basic [Abstract] CAPITAL STOCK Equity [Text Block] Costs and expenses: Costs and Expenses [Abstract] Security Exchange Name Security Exchange Name Debt term (in years) Debt Instrument, Term Treasury stock at cost, 3,204 and 2,690 shares at March 31, 2026 and December 31, 2025, respectively Treasury Stock, Common, Value Debt instrument, interest rate (as a percent) Debt Instrument, Interest Rate, Effective Percentage SUPPLEMENTAL CASH FLOW INFORMATION Cash Flow, Supplemental Disclosures [Text Block] 6.50% Senior Notes due 2026 6.50% Senior Notes Senior Notes due 2026 Senior Notes 6.50% Due 2026 [Member] Senior Notes 6.50% Due 2026 Percent of revenue Revenue, Performance 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[Abstract] Fair Value Disclosures [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Equity pension contribution Stock Issued During Period, Value, Employee Benefit Plan SEGMENT REPORTING Segment Reporting [Text Block] Minimum Minimum [Member] Line of credit amount Long-Term Line of Credit Expiration Date Trading Arrangement Expiration Date Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Shares used in the computation of loss per share: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Current and Long-term restricted cash and cash equivalents Restricted Cash and Cash Equivalent Diluted continuing operations, diluted (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Basic continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement 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securities excluded from computing of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Translation and other Standard and Extended Product Warranty Accrual, Foreign Currency Translation Gain (Loss) Schedule of Goodwill Goodwill [Table Text Block] Customer contract asset noncurrent Capitalized Contract Cost, Net, Noncurrent Entity Central Index Key Entity Central Index Key Less accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization Capital in excess of par value Additional Paid in Capital, Common Stock All Adjustments to Compensation All Adjustments to Compensation [Member] Equity [Abstract] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Remaining performance obligations (as a percent) Revenue, Remaining Performance Obligation, Percentage Other comprehensive income (loss) before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report Ownership [Axis] Ownership [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Dividends paid Dividends, Preferred Stock, Cash Deferred tax assets Deferred Income Tax Assets, Net Finance lease liabilities, net of current portion Finance Lease, Liability, Noncurrent Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Schedule of Finite-Lived Intangible Assets Intangible Asset, Finite-Lived [Table Text Block] Schedule of Assumptions Used to Determine Fair Value of SARs Granted Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Debt Covenant [Domain] Debt Covenant [Domain] Debt Covenant [Domain] City Area Code City Area Code Variable Rate [Domain] Variable Rate [Domain] Restricted Stock Restricted Stock [Member] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Related party, compensation gross sale percent Sale Of Stock, Compensation Percent Of Gross Proceeds Sale Of Stock, Compensation Percent Of Gross Proceeds SUBSEQUENT EVENTS Subsequent Events [Text Block] Expected volatility Measurement Input, Price Volatility [Member] Estimated fair value Debt Instrument, Fair Value Disclosure Name Forgone Recovery, Individual Name Finished goods Inventory, Finished Goods, Net of Reserves Weighted-average period Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] INTANGIBLE ASSETS, NET Intangible Asset [Text Block] Statement [Line Items] Statement [Line Items] Total assets Assets Entity [Domain] Entity [Domain] Defined Benefit Plan [Table] Defined Benefit Plan [Table] Preferred stock, issued (in shares) Preferred Stock, Shares Issued Amortization of prior service cost Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Less finance lease accumulated amortization Finance Lease, Right-of-Use Asset, Accumulated Amortization Contracts in progress, percent change Increase (Decrease) In Contract With Customer, Asset, Percent Increase (Decrease) In Contract With Customer, Asset, Percent Contracts With Customer [Table] Contracts With Customer [Table] Contracts With Customer [Table] Interest expense Interest expense, net Total interest expense Interest Expense, Nonoperating Letters of credit under non-domestic facilities Letter Of Credit, Non-Domestic Facilities [Member] Letter Of Credit, Non-Domestic Facilities Revenues Disposal Group, Including Discontinued Operation, Revenue STOCK-BASED COMPENSATION Share-Based Payment Arrangement [Text Block] Accounts receivable - trade, net, percent change Increase (Decrease) In Accounts Receivable, Percent Increase (Decrease) In Accounts Receivable, Percent Stock sale agreement, aggregate amount offered (up to) Sale Of Stock, Aggregate Authorized Amount Sale Of Stock, Aggregate Authorized Amount Other current and noncurrent assets Increase (Decrease) in Other Operating Assets Common stock offering, net (in shares) Stock Issued During Period, Shares, New Issues PEO PEO [Member] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Parts Parts [Member] Parts Compensation expense Share-Based Payment Arrangement, Expense Other noncurrent liabilities Other Liabilities, Noncurrent Goodwill Beginning balance Ending balance Goodwill Retirement Plan Type [Axis] Retirement Plan Type [Axis] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] B. Riley Securities, Inc. B. Riley Securities, Inc. [Member] B. Riley Securities, Inc. Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Warrants Warrants [Member] Warrants Revenue recognized Contract with Customer, Liability, Revenue Recognized Subsequent Event Type [Domain] Subsequent Event Type [Domain] Accumulated Deficit Retained Earnings [Member] Operating lease liabilities, net of current portion Operating Lease, Liability, Noncurrent Revolving Credit Facility Credit Agreement Revolving Credit Facility [Member] Credit Agreement Credit Facility [Member] Credit Facility 7.75% Series A Cumulative Perpetual Preferred Stock Series A Preferred Stock Series A Preferred Stock [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] B. Riley Capital Management, LLC B. Riley Capital Management, LLC [Member] B. 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