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Collateral Held [Axis] Collateral Held [Axis] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table] Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Distribution to/redemption of noncontrolling interest Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Common stock, shares issued (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Treasury stock, shares (in shares) Beginning balance (in shares) Ending balance (in shares) Treasury Stock, Common, Shares Equity Components [Axis] Equity Components [Axis] Debt instrument, covenant, leverage ratio, maximum Debt Instrument, Covenant, Leverage Ratio, Maximum Debt Instrument, Covenant, Leverage Ratio, Maximum Accounts receivable and unbilled accounts receivable Increase (Decrease) in Accounts Receivable Products And Services Product and Service [Domain] Entity Interactive Data Current Entity Interactive Data Current Less: Net income attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Deferred income taxes Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive income attributable to Wabtec shareholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Termination Date Trading Arrangement Termination Date Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] WARRANTIES Product Warranty Disclosure [Text Block] Plan term Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Other noncurrent assets Other Assets, Noncurrent Financing Activities Cash Provided by (Used in) Financing Activity, Continuing Operation [Abstract] Document Type Document Type Acquisitions of businesses, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired 2025 Credit Agreement: 2025 Credit Agreement [Member] 2025 Credit Agreement Fair Value as of Grant Date Award Grant Date Fair Value Collateral Pledged Collateral Pledged [Member] Debt redemption price (as a percent) Debt Instrument, Redemption Price, Percentage Supply Chain Financing Program Supplier Finance Program [Policy Text Block] Supplier Finance Program ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Schedule Of Goodwill [Table] Goodwill [Table] Change in unrealized gain (loss) on pension and post-retirement benefit plans Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Account receivable securitization facility, maximum amount Account Receivable Securitization Facility, Maximum Amount Account Receivable Securitization Facility, Maximum Amount Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Noncurrent contract liabilities Contract with Customer, Liability, Noncurrent Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Other comprehensive income (loss) before tax Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Number of countries company operates (over) Number of Countries in which Entity Operates Below market intangible amortization Amortization Of Intangible Liability Amortization Of Intangible Liability Commitments and contingencies (Note 14) Commitments and Contingencies Gross Carrying Amount Intangible Asset, Finite-Lived, before Accumulated Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Equity (loss) income Income (Loss) from Equity Method Investments 2030 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Four Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Original Equipment Manufacturer OEM [Member] OEM Award vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Goodwill [Roll Forward] Goodwill [Roll Forward] Liabilities and Shareholders’ Equity Liabilities and Equity [Abstract] Finite Lived Intangible Assets Major Class Name Intangible Asset, Finite-Lived, Class [Domain] Supplier finance program, obligation Supplier Finance Program, Obligation Inventories, net Total inventories Inventory, Net Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name Award Type [Domain] 2025 Term Credit Agreement and 2025 Credit Agreement 2025 Term Credit Agreement And 2025 Credit Agreement [Member] 2025 Term Credit Agreement And 2025 Credit Agreement Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Remaining 2026 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Balance at beginning of year Balance at September 30 Standard and Extended Product Warranty Accrual 2027 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year One Stock repurchase (in shares) Treasury Stock, Shares, Acquired Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] PEO Name PEO Name Other accrued liabilities Increase (Decrease) in Accrued Liabilities Restricted cash Restricted Cash Balance at beginning of year Balance at end of period Contract with Customer, Liability Derivative contracts Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Assets acquired Business Combination, Recognized Asset Acquired, Asset [Abstract] Stock repurchase Treasury Stock, Value, Acquired, Cost Method Cash, cash equivalents and restricted cash Cash, cash equivalents and restricted cash, beginning of period Cash, cash equivalents and restricted cash, end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Schedule Of Finite Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Accounts payable Increase (Decrease) in Accounts Payable Warranty claim payments Standard and Extended Product Warranty Accrual, Decrease for Payments Other accrued liabilities Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Debt Instrument Debt Instrument [Axis] Depreciation Expense Depreciation, Depletion, and Amortization [Policy Text Block] Proceeds from treasury stock issued from the exercise of stock options and other benefit plans, net of tax Stock Issued During Period, Value, Stock Options Exercised, Net Of Tax Stock Issued During Period, Value, Stock Options Exercised, Net Of Tax Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense 2028 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two Total assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Including Goodwill Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Including Goodwill Adjustment for incentive stock awards expected to vest (in dollars per shares) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Net Performance Adjustment Weighted Average Net Performance Adjustment Fair Value Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Net Performance Adjustment Weighted Average Net Performance Adjustment Fair Value Schedule of Components of Inventory, Net of Reserves Schedule of Inventory, Current [Table Text Block] LEASES Lessee, Operating Leases [Text Block] Expected return on pension assets/amortization Periodic Defined Benefits Expense Reversal Of Expense Excluding Interest Cost And Service Cost Component Periodic Defined Benefits Expense Reversal Of Expense Excluding Interest Cost And Service Cost Component Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Net income attributable to Wabtec shareholders (in dollars per share) Basic (in dollars per share) Earnings Per Share, Basic Repurchase of stock Payments for Repurchase of Common Stock Customer deposits Contract with Customer, Liability, Current Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Payments of debt Repayment of Long-Term Debt, Long-Term Lease Obligation, and Capital Security Long-term debt Long-term portion Long-Term Debt, Excluding Current Maturities Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) Restated Credit Agreement Term Loan Facility Restated Credit Agreement [Member] Restated Credit Agreement Restructuring and Related Activities [Abstract] Product Or Service Product and Service [Axis] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Employee Severance Employee Severance [Member] Operating lease cost Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover page. Cover [Abstract] Net cash proceeds received Proceeds from (Repayments of) Accounts Receivable Securitization Frauscher Sensor Technology Group GmbH Frauscher Sensor Technology Group GmbH [Member] Frauscher Sensor Technology Group GmbH Derivative Contract Type Derivative Contract [Domain] Foreign currency impact Goodwill, Foreign Currency Translation, Gain (Loss) Equity Awards Adjustments Equity Awards Adjustments [Member] 2025 Term Credit Agreement: 2025 Term Credit Agreement [Member] 2025 Term Credit Agreement Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Foreign currency impact Contract With Customer Asset Increase (Decrease) Foreign Currency Translation Adjustment Contract With Customer Asset Increase (Decrease) Foreign Currency Translation Adjustment Total Liabilities and Equity Liabilities and Equity Trade names Business Combination, Recognized Asset Acquired, Trade Names Business Combination, Recognized Asset Acquired, Trade Names Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Stock Option Share-Based Payment Arrangement, Option [Member] Gain (loss) on foreign currency derivative instruments not designated as hedging instruments Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Noncontrolling interest Equity, Attributable to Noncontrolling Interest Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Restructuring charges Restructuring Charges Plan Name [Axis] Plan Name [Axis] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Tabular List, Table Tabular List [Table Text Block] Other miscellaneous expense, net Other Nonoperating Income (Expense) Other Borrowings Other Debt Obligations [Member] 2029 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three Remainder of 2026 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Remainder of Fiscal Year Name Awards Close in Time to MNPI Disclosures, Individual Name Equity Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Canceled (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Aftermarket Aftermarket [Member] Aftermarket Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward] Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward] Adjustment to Compensation: Adjustment to Compensation [Axis] Amounts reclassified from Accumulated other comprehensive loss Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Hedging Designation [Domain] Hedging Designation [Domain] Product Warranties Disclosures [Abstract] Product Warranties Disclosures [Abstract] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Foreign Exchange Forward Foreign Exchange Forward [Member] Credit Facility Credit Facility [Axis] RESTRUCTURING Restructuring and Related Activities Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Name Measure Name Awards Excluding Restricted Stock Awards Excluding Restricted Stock [Member] Awards Excluding Restricted Stock INCOME TAXES Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Four Lessee, Operating Lease, Liability, Payments, Due after Year Four Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Less: Net income allocated to non-vested restricted stock Net Income (Loss) Allocated to General Partners Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Equipment Equipment [Member] Adjustment for incentive stock awards expected to vest (in shares) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number Expected To Vest Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number Expected To Vest Name Trading Arrangement, Individual Name Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures Raw materials Inventory, Raw Materials, Net of Reserves Company Selected Measure Amount Company Selected Measure Amount Inspection Technologies Inspection Technologies [Member] Inspection Technologies Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Foreign currency impact Contract With Customer Liability Increase (Decrease) Foreign Currency Translation Adjustment Contract With Customer Liability Increase (Decrease) Foreign Currency Translation Adjustment Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts and Financing Receivables [Table] Net income Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Assets Assets, Current [Abstract] Weighted-average remaining lease term (years) Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Frauscher Acquisition And Agreement To Acquire Dellner Couplers Frauscher Acquisition And Agreement To Acquire Dellner Couplers [Member] Frauscher Acquisition And Agreement To Acquire Dellner Couplers Income tax expense Income Tax Expense (Benefit) OTHER INCOME (EXPENSE), NET Other Income and Other Expense Disclosure [Text Block] Accumulated Other Comprehensive Loss Comprehensive Income, Policy [Policy Text Block] Total cost of sales Cost of sales Cost of Product and Service Sold Acquired technology Technology-Based Intangible Assets [Member] Award Timing Method Award Timing Method [Text Block] Decrease in cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Scenario Forecast Forecast [Member] Number of completed acquisitions Business Combination, Acquisitions Completed Business Combination, Acquisitions Completed Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Numerator Net Income (Loss) Attributable to Parent [Abstract] AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Net income attributable to Wabtec shareholders Net income attributable to Wabtec shareholders Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Schedule of Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Liabilities assumed Business Combination, Recognized Liability Assumed, Liability [Abstract] Schedule of Change in Carrying Amount of Contract Assets and Contract Liabilities Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Revolving Receivables Program Accounts Receivable Securitization, Policy [Policy Text Block] Accounts Receivable Securitization, Policy Net sales: Revenues [Abstract] Treasury stock, retired (in shares) Treasury Stock, Shares, Retired Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Base Rate [Member]