Amount of Increase (Decrease) in Contract Liabilities, Current Amount of Increase (Decrease) in Contract Liabilities, Current Amount of Increase (Decrease) in Contract Liabilities, Current Proceeds from Long-term Lines of Credit Proceeds from Long-Term Lines of Credit Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Goodwill acquired Goodwill, Acquired During Period Statistical Measurement [Domain] Statistical Measurement [Domain] Capital expenditures Segment, Expenditure, Addition to Long-Lived Assets Change in other long-term liabilities and assets related to HEICO Leadership Compensation Plan Increase (Decrease) in Obligation, Other Postretirement Benefits Cover [Abstract] Cover [Abstract] Schedule of Product Warranties [Table] Schedule of Product Warranties [Table] Schedule of Product Warranties [Table] Net (decrease) increase in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect FY2023 Acquisition Subsidiary 1 FY2023 Acquisition Subsidiary 1 [Member] FY2023 Acquisition Subsidiary 1 Measurement Input, Discount Rate [Member] Measurement Input, Discount Rate [Member] Intangible Asset, Indefinite-Lived [Table] Intangible Asset, Indefinite-Lived [Table] Business Acquisition, Percentage of Voting Interests Acquired Business Acquisition, Percentage of Voting Interests Acquired Trading Symbol Trading Symbol Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Comprehensive income from consolidated operations Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Long-term debt, net of current maturities Long-Term Debt and Lease Obligation Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Less: Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Adjustments to goodwill Goodwill, Measurement Period Adjustment Common Class A [Member] Class A Common Stock [Member] Common Class A [Member] Distributions to noncontrolling interests Distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Basis of Presentation [Text Block] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Fair Value Disclosures [Text Block] Fair Value Disclosures [Text Block] Proceeds from Stock Options Exercised Proceeds from Stock Options Exercised Denominator: Denominator [Abstract] Denominator. Royalty Rate Royalty Rate [Member] Royalty Rate Redeemable Noncontrolling Interest, by Legal Entity [Table] Redeemable Noncontrolling Interest [Table] Estimated Amortization Expense, for fiscal 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Three Goodwill [Line Items] Goodwill [Line Items] Common stock, shares outstanding Common Stock, Shares, Outstanding Total debt and capital leases Debt and Lease Obligation Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] HEICO stock held by irrevocable trust Common Stock Issued, Employee Stock Trust Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Contract liabilities Contract with Customer, Liability, Current Issuance of common stock to Savings and Investment Plan Stock Issued During Period, Value, Employee Benefit Plan Other assets Other Assets, Noncurrent Entity Tax Identification Number Entity Tax Identification Number Gross Carrying Amount Finite-Lived Intangible Assets, Gross Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Long-Term Debt Instruments [Table Text Block] Balance Sheets Parenthetical [Abstract] Balance Sheets Parenthetical [Abstract] Money Market Funds [Member] Money Market Funds [Member] Operating Segments [Member] Operating Segments [Member] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Redeemable based on a multiple of future earnings Redeemable Noncontrolling Interest, Equity, Fair Value Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Amount of Increase (Decrease) in Net Contract Assets Amount of Increase (Decrease) in Net Contract Assets Amount of Increase (Decrease) in Net Contract Assets Stockholders' Equity, Other Stockholders' Equity, Other Equity Components [Axis] Equity Components [Axis] Trade Names [Member] Trade Names [Member] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Schedule Of Identifiable Intangible Assets [Table Text Block] Schedule Of Identifiable Intangible Assets [Table Text Block] Tabular disclosure of the carrying value of intangible assets both subject to and not subject to amortization, excluding goodwill, in total and by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of the company. Redeemable noncontrolling interests Starting Balance, Redeemable Noncontrolling Interests Ending Balance, Redeemable Noncontrolling Interests Redeemable noncontrolling interests Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests Total operating costs and expenses Costs and Expenses Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Contract assets Contract with Customer, Asset, before Allowance for Credit Loss, Current Capital in excess of par value Additional Paid in Capital, Common Stock Other Electronic Components [Member] Other Electronic Components [Member] Other Electronic Components [Member] Entity Small Business Entity Small Business Payments of Debt Issuance Costs Payments of Debt Issuance Costs Significant Unobservable Inputs (Level 3) [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Amount of Increase (Decrease) in Contract Assets, Current Amount of Increase (Decrease) in Contract Assets, Current Amount of Increase (Decrease) in Contract Assets, Current Accounts receivable, net Receivables, Net, Current Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Business Combination, Contingent Consideration, Liability, Current Business Combination, Contingent Consideration, Liability, Current Finance Leases and Notes Payable Finance Leases and Notes Payable Present value of lessee's discounted obligation for lease payments from finance lease and the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer. Accrued expenses and other current liabilities Accrued Liabilities, Current Accrued Liabilities, Current Anti-dilutive stock options excluded Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Credit Facility [Domain] Credit Facility [Domain] Cash and cash equivalents at beginning of year Cash and cash equivalents at end of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Weighted average interest rate Debt, Weighted Average Interest Rate Schedule of Accounts Receivable [Table] Accounts and Financing Receivables [Table] Deferred Compensation Plan, Asset Categories [Axis] Deferred Compensation Plan, Asset Categories [Axis] Deferred Compensation Plan, Asset Categories [Axis] Current assets: Assets, Current [Abstract] Goodwill Opening Balance Ending Balance Goodwill Consolidation Items [Axis] Consolidation Items [Axis] Specialty Products [Member] Specialty Products [Member] Specialty Products [Member] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-Lived Intangible Assets, Major Class Name [Domain] Payment for Contingent Consideration Liability, Operating Activities Payment for Contingent Consideration Liability, Operating Activities Value of Stock Held During Period in Irrevocable Trust for Deferred Compensation Obligation Value of Stock Held During Period in Irrevocable Trust for Deferred Compensation Obligation Value of shares issued during the period for deferred compensation obligation but held in irrevocable trust Warranty claims settled Standard and Extended Product Warranty Accrual, Decrease for Payments Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table] Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table] Noncontrolling Interest, Increase from Business Combination Noncontrolling Interest, Increase from Business Combination Product and Service [Domain] Product and Service [Domain] Entity Information [Line Items] Entity Information [Line Items] Depreciation Depreciation Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Fair Value, Level 3, Indefinite-Lived Trade Names, Measurement Input Fair Value, Level 3, Indefinite-Lived Trade Names, Measurement Input Unobservable input, used to determine the estimated fair value of the Level 3 trade name Proceeds from (Payments for) Other Financing Activities Proceeds from (Payments for) Other Financing Activities Comprehensive income attributable to HEICO Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive Income (Loss), Net of Tax, Attributable to Parent Income taxes payable Accrued Income Taxes, Current Security Exchange Name Security Exchange Name Foreign currency translation adjustments Goodwill, Foreign Currency Translation Gain (Loss) Less: Foreign currency translation adjustments attributable to noncontrolling interests Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest Work in process Inventory, Work in Process, Net of Reserves Property, plant and equipment, net Property, plant and equipment, net Property, Plant and Equipment, Net Stock or Unit Option Plan Expense Stock or Unit Option Plan Expense Total liabilities Liabilities Noncontrolling interests Equity, Attributable to Noncontrolling Interest Cash dividends per share (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Corporate And Eliminations [Member] Other Primarily Corporate and Intersegment [Member] Corporate And Eliminations [Member] Corporate And Eliminations [Member] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share R&D expenses Research and Development Expense Revolving Credit Facility [Member] Revolving Credit Facility [Member] Net Cash Provided by (Used in) Investing Activities [Abstract] Net Cash Provided by (Used in) Investing Activities [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Common stock, shares issued Common Stock, Shares, Issued Change in Income Taxes Payable Increase (Decrease) in Income Taxes Payable Entity [Domain] Entity [Domain] Other Finite-Lived Intangible Assets, Gross Other Finite-Lived Intangible Assets, Gross Schedule of Research and Development Expenses [Table Text Block] Schedule of Research and Development Expenses [Table Text Block] Tabular disclosure of the amount of new product research and development expenses (R&D expenses) included in costs of sales. Canada, Dollars Canada, Dollars Less: Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Subsequent Event [Line Items] Subsequent Event [Line Items] Property, plant and equipment, gross Property, Plant and Equipment, Gross Reconciliation of Assets from Segment to Consolidated [Table] Reconciliation of Assets from Segment to Consolidated [Table] Debt Instrument [Line Items] Debt Instrument [Line Items] Debt Instrument [Line Items] Common stock, shares authorized Common Stock, Shares Authorized Payments to Acquire Businesses, Net of Cash Acquired Payments to Acquire Businesses, Net of Cash Acquired Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted Aerospace [Member] Aerospace [Member] Customers within the Aerospace industry [Member] Estimated Amortization Expense, remainder of fiscal year Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Product Warranty Liability [Axis] Product Warranty Liability [Axis] Product Warranty Liability [Axis] Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Total HEICO shareholders' equity Equity, Attributable to Parent Amount of Increase (Decrease) in Contract Liabilities Amount of Increase (Decrease) in Contract Liabilities Amount of Increase (Decrease) in Contract Liabilities 2019 acquisition 2019 acquisition [Member] 2019 acquisition Amortization of unrealized loss on defined benefit pension plan, net of tax Defined Benefit Plan, Amortization of Gain (Loss) Segment Reporting, Asset Reconciling Item [Line Items] Segment Reporting, Asset Reconciling Item [Line Items] Construction in progress Construction in Progress, Gross Business Combinations [Abstract] Business Combinations [Abstract] Deferred income tax provision (benefit) Deferred Income Tax Expense (Benefit) Schedule of Goodwill [Table Text Block] Schedule of Goodwill [Table Text Block] Payment for Contingent Consideration Liability, Financing Activities Payment for Contingent Consideration Liability, Financing Activities Selling, general and administrative expenses Selling, General and Administrative Expense Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Noncontrolling Interest, Ownership Percentage by Parent Subsidiary, Ownership Percentage, Parent Common Stock Issued Repurchased and Retired Related To Stock Option Exercises Common Stock Issued Repurchased and Retired Related To Stock Option Exercises The fair value of common stock repurchased by the entity that was surrendered by employees as settlement for employee tax withholding obligations due in connection with exercises of non-qualified stock options. Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Document Fiscal Period Focus Document Fiscal Period Focus Effect of dilutive stock options Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Accounts receivable Accounts Receivable, before Allowance for Credit Loss, Current Estimated Amortization Expense, for fiscal 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Two Business Acquisition, Goodwill, Expected Tax Deductible Amount Business Acquisition, Goodwill, Expected Tax Deductible Amount ASSETS Assets Assets [Abstract] Total other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Document Type Document Type Debt Instrument, Interest Rate, Effective Percentage Debt Instrument, Interest Rate, Effective Percentage Classification Type [Domain] Classification Type [Domain] [Domain] for Classification Type [Axis] Schedule Of Segment Reporting Information By Segment [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Accrued customer rebates and credits Accrued Customer Rebates and Credits Carrying value as of the balance sheet date of accrued customer rebates and credits. Materials, parts, assemblies and supplies Inventory, Raw Materials and Purchased Parts, Net of Reserves NoncontrollingInterestDecreaseFromBusinessAcquisition NoncontrollingInterestDecreaseFromBusinessAcquisition Amount of decrease in noncontrolling interest from business combination Deferred compensation plans Deferred Compensation Plan Assets Contract with Customer, Asset and Liability [Table Text Block] Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Inventory, Current [Table] Inventory, Current [Table] Subsequent Event [Table] Subsequent Event [Table] Net Carrying Amount Indefinite-Lived Intangible Assets (Excluding Goodwill) Maximum [Member] Maximum [Member] Amortization expense related to intangible assets Amortization of Intangible Assets Contract with Customer, Liability Contract with Customer, Liability Net Carrying Amount Finite-Lived Intangible Assets, Net Classification Type [Axis] Classification Type [Axis] Classification Type [Axis] Trade accounts payable Accounts Payable, Current Accounting Policies [Abstract] Accounting Policies [Abstract] Liabilities [Abstract] Liabilities: Liabilities [Abstract] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Business Combination, Reversal of Remaining Contingent Consideration, Liability Business Combination, Reversal of Remaining Contingent Consideration, Liability Business Combination, Reversal of Remaining Contingent Consideration, Liability Amount of contingent consideration reversed during the period, due to the termination of the contingent consideration agreement. Standard and Extended Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties Standard and Extended Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties Acquisitions [Text Block] Business Combination Disclosure [Text Block] Current Fiscal Year End Date Current Fiscal Year End Date Schedule of Earnings Per Share, Basic and Diluted [Line Items] Schedule of Earnings Per Share, Basic and Diluted [Line Items] [Line Items] for Schedule of Earnings Per Share, Basic and Diluted [Table] Statistical Measurement [Axis] Statistical Measurement [Axis] Payments to Noncontrolling Interests Payments to Noncontrolling Interests Income before income taxes and noncontrolling interests Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Other comprehensive income (loss): Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Senior Notes, Noncurrent Senior Notes, Noncurrent Capital In Excess Of Par Value [Member] Additional Paid-in Capital [Member] Schedule of Accounts Receivable [Table Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Change in Contract Assets Increase (Decrease) in Contract with Customer, Asset Subsequent Event Type [Domain] Subsequent Event Type [Domain] Payments of Ordinary Dividends, Common Stock Payments of Ordinary Dividends, Common Stock Customer Relationships [Member] Customer Relationships [Member] New Accounting Pronouncements, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Diluted (in dollars per share) Earnings Per Share, Diluted Earnings Per Share, Diluted Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Axis] Description of Acquired Entity Business Acquisition, Description of Acquired Entity Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Entity Interactive Data Current Entity Interactive Data Current Finite-Lived Customer Relationships, Gross Finite-Lived Customer Relationships, Gross Ownership [Axis] Ownership [Axis] Amount of Increase (Decrease) in Contract Liabilities, Noncurrent Amount of Increase (Decrease) in Contract Liabilities, Noncurrent Amount of Increase (Decrease) in Contract Liabilities, Noncurrent Selected Financial Statement Information [Abstract] Selected Financial Statement Information [Abstract] Preferred Stock, Shares Issued Preferred Stock, Shares Issued Customer [Axis] Customer [Axis] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Aftermarket Replacement Parts [Member] Aftermarket Replacement Parts [Member] Aftermarket Replacement Parts [Member] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Business Combination, Contingent Consideration, Liability, Measurement Input Business Combination, Contingent Consideration, Liability, Measurement Input Change in Receivables Increase (Decrease) in Receivables Stock Redeemed or Called During Period, Value Stock Redeemed or Called During Period, Value Net income from consolidated operations Net income from consolidated operations Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Pension Benefit Obligation [Member] Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Income tax expense Income Tax Expense (Benefit) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Revenue from Contract with Customer, Excluding Assessed Tax Revenue from Contract with Customer, Excluding Assessed Tax Schedule of Earnings Per Share, Basic and Diluted [Table] Schedule of Earnings Per Share, Basic and Diluted [Table] Schedule of Earnings Per Share, Basic and Diluted [Table] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Effective Income Tax Rate Reconciliation, Percent Effective Income Tax Rate Reconciliation, Percent Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Operating income Operating Income (Loss) Operating Income (Loss) Business Acquisition [Line Items] Business Acquisition [Line Items] Total liabilities and equity Liabilities and Equity Corporate Owned Life Insurance [Member] Corporate Owned Life Insurance [Member] Corporate owned life insurance [Member] Subsequent Events [Text Block] Subsequent Events [Text Block] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Change in Prepaid Expense and Other Assets Increase (Decrease) in Prepaid Expense and Other Assets Guarantor Obligations, Maximum Exposure, Undiscounted Guarantor Obligations, Maximum Exposure, Undiscounted Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Legal Entity [Axis] Legal Entity [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Current maturities of long-term debt Long-Term Debt and Lease Obligation, Current Deferred Compensation Obligation [Member] Deferred Compensation Obligation [Member] Repair and Overhaul Parts and Services [Member] Repair and Overhaul Parts and Services [Member] Repair and Overhaul Parts and Services [Member] Measurement Input Type [Axis] Measurement Input Type [Axis] Scenario [Domain] Scenario [Domain] AOCI Attributable to Parent [Member] AOCI Attributable to Parent [Member] Debt Instrument, Date of First Required Payment Debt Instrument, Date of First Required Payment Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Net Investment Related to Deferred Compensation Plan Net Investment Related to Deferred Compensation Plan Net Investment Related to Deferred Compensation Plan Inventories, net Inventory, Net Product and Service [Axis] Product and Service [Axis] Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] State Entity Address, State or Province Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Adjustments to redemption amount of redeemable noncontrolling interests Adjustments to redemption amount of redeemable noncontrolling interests Noncontrolling Interest, Change in Redemption Value Balances Statement [Line Items] Statement [Line Items] Measurement Input Type [Domain] Measurement Input Type [Domain] Inventory [Domain] Inventory [Domain] Aggregate LCP Liability [Member] Aggregate LCP Liability [Member] Aggregate LCP Liability [Member] Schedule of Property, Plant and Equipment [Table Text Block] Property, Plant and Equipment [Table Text Block] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Opening balance, Liabilities Ending balance, Liabilities Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Minimum [Member] Minimum [Member] Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block] Contract with Customer, Liability, Noncurrent Contract with Customer, Liability, Noncurrent Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Capewell Capewell [Member] Capewell Currency [Axis] Currency [Axis] Statement, Business Segments [Axis] Segments [Axis] Segments [Axis] Defined Benefit Plan, Liability Categories [Domain] Defined Benefit Plan, Liability Categories [Domain] [Domain] for Defined Benefit Plan, Liability Categories [Axis] Inventory [Line Items] Inventory [Line Items] Selected Financial Statement Information [Text Block] Additional Financial Information Disclosure [Text Block] Earnings Per Share [Text Block] Earnings Per Share [Text Block] Subsequent Event Subsequent Event [Member] Net contract assets Contract with Customer, Asset, before Allowance for Credit Loss Proceeds from stock option exercises Stock Issued During Period, Value, Stock Options Exercised Operating costs and expenses: Costs and Expenses [Abstract] Inventory [Axis] Inventory [Axis] Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Intangible Assets Disclosure [Text Block] Redeemable Noncontrolling Interest [Line Items] Redeemable Noncontrolling Interest [Line Items] Shareholders' equity: Equity, Attributable to Parent [Abstract] Redeemable Noncontrolling Interests [Member] Redeemable Noncontrolling Interests [Member] Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Segment [Domain] Segments [Domain] Segments [Domain] Electronic Components for Defense, Space and Aerospace [Member] Electronic Components for Defense, Space and Aerospace [Member] Electronic Components for Defense, Space and Aerospace [Member] Estimated Amortization Expense, for fiscal 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Four Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Entities [Table] Entities [Table] Other (expense) income Other Nonoperating Income (Expense) Document Information, Document [Axis] Document Information, Document [Axis] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Intangible assets, net Intangible Asset Net Carrying Amount Intangible Assets, Net (Excluding Goodwill) Finite-Lived Intellectual Property, Gross Finite-Lived Intellectual Property, Gross Gross carrying amount before accumulated amortization as of the balance sheet date of capitalized intellectual property having a finite beneficial life. 2028 Senior Notes 2028 Senior Notes [Member] 2028 Senior Notes Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Deferred compensation obligation Deferred Compensation Obligation Deferred compensation obligation payable in company common stock. Schedule of Product Warranties [Line Items] Schedule of Product Warranties [Line Items] [Line Items] for Schedule of Product Warranties [Table] Proceeds from Issuance of Senior Long-Term Debt Proceeds from Issuance of Senior Long-Term Debt Local Phone Number Local Phone Number Contract with Customer, Asset and Liability [Abstract] Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract] Intangible Assets, Gross (Excluding Goodwill) Intangible Assets, Gross (Excluding Goodwill) 2033 Senior Notes 2033 Senior Notes [Member] 2033 Senior Notes FY 2015 Acquisition FY 2015 Acquisition [Member] FY 2015 Acquisition Deferred income taxes Deferred Income Tax Liabilities, Net Proceeds from stock option exercises, Adjustment to Additional Paid in Capital APIC, Share-Based Payment Arrangement, Option, Increase for Cost Recognition Increase (Decrease) in Operating Capital [Abstract] Increase (Decrease) in Operating Capital [Abstract] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Senior Notes Senior Notes Defense and Space [Member] Defense and Space [Member] Customers within the Defense and Space industries [Member] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Value of Stock Issued During Period for Deferred Compensation Obligation Value of Stock Issued During Period for Deferred Compensation Obligation Value of shares issued during the period to deferred compensation obligation Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Disclosure [Text Block] Estimated Amortization Expense, thereafter Finite-Lived Intangible Asset, Expected Amortization, after Year Five Debt Disclosure [Abstract] Debt Disclosure [Abstract] Adjustments to Additional Paid in Capital, Other Adjustments to Additional Paid in Capital, Other Common Stock [Member] Common Stock [Member] Schedule of Impaired Intangible Assets Schedule of Impaired Intangible Assets [Table Text Block] Preferred Stock, Shares Authorized Preferred Stock, Shares Authorized Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Indefinite-lived Intangible Assets [Axis] Indefinite-Lived Intangible Assets [Axis] Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items] Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items] Related liabilities of deferred compensation plans, specified as other long-term liabilities Deferred Compensation Liability, Classified, Noncurrent Segment Reporting [Abstract] Segment Reporting [Abstract] Entity Central Index Key Entity Central Index Key Debt Instrument, Maturity Date Debt Instrument, Maturity Date Scenario [Axis] Scenario [Axis] Schedule of Inventories [Table Text Block] Schedule of Inventory, Current [Table Text Block] Net Contract with Customer, Liabilities Net Contract with Customer, Liabilities Net Contract with Customers, Liabilities Foreign Currency Translation [Member] Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Accruals for warranties Standard and Extended Product Warranty Accrual, Increase for Warranties Issued Equity Component [Domain] Equity Component [Domain] Equity Component [Domain] Preferred Stock, Par or Stated Value Per Share Preferred Stock, Par or Stated Value Per Share Current maturities of long-term debt Long-Term Debt, Current Maturities Segment Reporting Disclosure [Text Block] Segment Reporting Disclosure [Text Block] Change in value of contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Share-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Entity Shell Company Entity Shell Company Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Intangible Assets, Net (Excluding Goodwill) [Abstract] Intangible Assets, Net (Excluding Goodwill) [Abstract] Indefinite-Lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure Indefinite-Lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure Consolidated Entities [Axis] Consolidated Entities [Axis] Statement [Table] Statement [Table] Statement [Table] Selected Financial Statement Information (Details) [Abstract] Selected Financial Statement Information (Details) [Abstract] Selected Financial Statement Information (Details) [Abstract] Interest expense Interest Expense, Debt Summary of Significant Accounting Policies [Text Block] Significant Accounting Policies [Text Block] Comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Consolidation Items [Domain] Consolidation Items [Domain] City Area Code City Area Code Current liabilities: Liabilities, Current [Abstract] Contingent consideration Total liabilities Business Combination, Contingent Consideration, Liability Fair Value, Inputs, Level 1 [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Fair Value, Inputs, Level 1 [Member] Unrealized gain (loss) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Total current assets Assets, Current Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Change in Accrued Expenses and Other Current Liabilities Increase (Decrease) in Accrued Liabilities Document Information [Line Items] Document Information [Line Items] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Other Intangible Assets Other Intangible Assets [Member] Income Tax Disclosure [Text Block] Income Tax Disclosure [Text Block] Net income per share attributable to HEICO shareholders: Earnings Per Share [Abstract] Earnings Per Share [Abstract] Retained earnings Retained Earnings (Accumulated Deficit) Class of Stock [Domain] Class of Stock [Domain] Class of Stock [Domain] Change in Inventories Increase (Decrease) in Inventories Repayments of Long-Term Lines of Credit Repayments of Long-Term Lines of Credit REVENUE [Abstract] REVENUE [Abstract] REVENUE [Abstract] Inventories, net of valuation reserves Inventory, Net of Allowances, Customer Advances and Progress Billings Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Credit Facility [Axis] Credit Facility [Axis] Cash dividends Dividends, Common Stock, Cash Measurement Input, Long-term Revenue Growth Rate [Member] Measurement Input, Long-Term Revenue Growth Rate [Member] Amendment Flag Amendment Flag Deferred Compensation Plan, Asset Categories [Domain] Deferred Compensation Plan, Asset Categories [Domain] Deferred Compensation Plan, Asset Categories [Domain] Long-Term Debt, Fair Value Long-Term Debt, Fair Value Entity Registrant Name Entity Registrant Name Numerator: Numerator [Abstract] Numerator. Depreciation, Depletion and Amortization Depreciation, Depletion and Amortization Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Increase (Decrease) in Temporary Equity [Roll Forward] Increase (Decrease) in Temporary Equity [Roll Forward] Schedule of Product Warranty Liability [Table Text Block] Schedule of Product Warranty Liability [Table Text Block] Subsequent Events [Abstract] Reconciliation of Assets from Segment to Consolidated [Table Text Block] Reconciliation of Assets from Segment to Consolidated [Table Text Block] Significant Other Observable Inputs (Level 2) [Member] Fair Value, Inputs, Level 2 [Member] Debt Issuance Costs, Net Debt Issuance Costs, Net Debt Disclosure Debt Disclosure [Text Block] Fair Value Hierarchy and NAV [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Shareholders' equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Debt Instrument, Face Amount Debt Instrument, Face Amount Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue [Table Text Block] Balances as of beginning of fiscal year Balances as of end of period Standard and Extended Product Warranty Accrual Zip Code Entity Address, Postal Zip Code Payments of Ordinary Dividends, Noncontrolling Interest Payments of Ordinary Dividends, Noncontrolling Interest Title of 12(b) Security Title of 12(b) Security Common Stock Common Stock, Value, Issued Land Land Deferred Compensation Plans [Abstract] Deferred Compensation Plans [Abstract] Deferred Compensation Plans [Abstract] Change in Contract with Customer, Asset and Liability [Abstract] Change in Contract with Customer, Asset and Liability [Abstract] Total customer rebates and credits deducted within net sales Accrued Customer Rebates and Credits Expense The total customer rebates and credits expense deducted within net sales. Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value FY2022 Acquisition Subsidiary 1 FY2022 Acquisition Subsidiary 1 [Member] FY2022 Acquisition Subsidiary 1 Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) Payments for (Proceeds from) Other Investing Activities Payments for (Proceeds from) Other Investing Activities Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill) Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill) Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill) Document [Domain] Document [Domain] Effect of exchange rate changes on cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations All Currencies [Domain] All Currencies [Domain] Indefinite-Lived Intangible Assets [Line Items] Indefinite-Lived Intangible Assets [Line Items] Net Cash Provided by (Used in) Financing Activities [Abstract] Net Cash Provided by (Used in) Financing Activities [Abstract] Preferred Stock, $.01 par value per share; 10,000 shares authorized; none issued Preferred Stock, Value, Issued Redeemable at fair value Redeemable Noncontrolling Interest, Equity, Common, Fair Value Basic (in dollars per share) Earnings Per Share, Basic Earnings Per Share, Basic Change in Trade Accounts Payable Increase (Decrease) in Accounts Payable Entity Common Stock Par Value Entity Listing, Par Value Per Share Sales by Industry [Member] Sales by Industry [Member] Sales by Industry [Member] Ownership [Domain] Ownership [Domain] Amortization Amortization Schedule of Goodwill [Table] Goodwill [Table] Schedule Of Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Table] Schedule Of Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Table] Indefinite-Lived Trade Names Indefinite-Lived Trade Names FY2022 Acquisition Subsidiary 2 FY2022 Acquisition Subsidiary 2 [Member] FY2022 Acquisition Subsidiary 2 Finite-Lived Intangible Assets, Net [Abstract] Finite-Lived Intangible Assets, Net [Abstract] Total current liabilities Liabilities, Current Flight Support Group [Member] Flight Support Group [Member] Flight Support Group. Machinery, equipment and tooling Machinery and Equipment, Gross Weighted average number of common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Total assets Total assets Assets Impairment, Intangible Asset, Indefinite-Lived, Segment [Extensible Enumeration] Impairment, Intangible Asset, Indefinite-Lived, Segment [Extensible Enumeration] Estimated Amortization Expense, for fiscal 2025 Finite-Lived Intangible Asset, Expected Amortization, Year One Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Borrowings under revolving credit facility Long-Term Line of Credit Payments to Acquire Property, Plant, and Equipment Payments to Acquire Property, Plant, and Equipment Other long-term liabilities Other Liabilities, Noncurrent Other Liabilities, Noncurrent Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Commitments and contingencies Commitments and Contingencies Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Repayments of Short-Term Debt Repayments of Short-Term Debt Repayments of Short-Term Debt Net sales Revenues Revenues Defined Benefit Plan, Liability Categories [Axis] Defined Benefit Plan, Liability Categories [Axis] Defined Benefit Plan, Liability Categories [Axis] FY2022 Acquisition Subsidiary 3 FY2022 Acquisition Subsidiary 3 [Member] FY2022 Acquisition Subsidiary 3 Entity City Entity Address, City or Town Schedule of Carrying Values and Estimated Fair Values of Debt Instruments Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Net income attributable to HEICO Net income attributable to HEICO Net Income (Loss) Attributable to Parent Debt Instrument, Payment Terms Debt Instrument, Payment Terms Employer contributions to HEICO Savings and Investment Plan Defined Contribution Plan, Employer Discretionary Contribution Amount Business Acquisition [Axis] Business Acquisition [Axis] FY2020 Acquisition Subsidiary 1 FY2020 Acquisition Subsidiary 1 [Member] FY2020 Acquisition Subsidiary 1 Entity File Number Entity File Number Consolidated Entities [Domain] Consolidated Entities [Domain] Revenue from Contract with Customer [Text Block] Revenue from Contract with Customer [Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Noncontrolling Interest [Member] Noncontrolling Interest [Member] Income Statement [Abstract] Income Statement [Abstract] Address Entity Address, Address Line One Temporary Equity, Other Changes Temporary Equity, Other Changes Other Industries [Member] Other Industries [Member] Customers within other industries [Member] Estimated Amortization Expense, for fiscal 2029 Finite-Lived Intangible Asset, Expected Amortization, Year Five Document Period End Date Document Period End Date Finished products Inventory, Finished Goods, Net of Reserves Other Noncash Income (Expense) Other Noncash Income (Expense) HEICO Stock Held By Irrevocable Trust [Member] HEICO Stock Held By Irrevocable Trust [Member] HEICO stock held by irrevocable trust. Buildings and improvements Buildings and Improvements, Gross Intellectual Property [Member] Intellectual Property [Member] Cost of sales Cost of Revenue Contract with Customer, Liability, Revenue Recognized Contract with Customer, Liability, Revenue Recognized Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] Less: Net income attributable to noncontrolling interests Less: Comprehensive income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Document Transition Report Document Transition Report Document Quarterly Report Document Quarterly Report FY 2017 Acquisition [Member] FY 2017 Acquisition [Member] FY 2017 Acquisitions Electronic Technologies Group [Member] Electronic Technologies Group [Member] Electronic Technologies Group. Schedule of Redeemable Noncontrolling Interests [Table Text Block] Redeemable Noncontrolling Interest [Table Text Block] Customer [Domain] Customer [Domain] Accumulated other comprehensive loss Starting accumulated other comprehensive loss Ending accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Current Reporting Status Entity Current Reporting Status Retained Earnings [Member] Retained Earnings [Member] Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Subsidiary, Ownership Percentage, Noncontrolling Owner Product Line [Member] Product Line [Member] Product Line [Member] Heico Common Stock [Member] Heico Common Stock [Member] Heico Common Stock [Member] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Basic Product Warranty Liability [Domain] Product Warranty Liability [Domain] [Domain] for Product Warranty Liability [Axis] Document Information [Table] Document Information [Table] Total shareholders' equity Beginning Balance Ending Balance Equity, Including Portion Attributable to Noncontrolling Interest Total Shareholders Equity [Member] Total Shareholders Equity [Member] Total Shareholders Equity, not including Redeemable Noncontrolling Interests Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Tax benefit from stock option exercises recognized in the period Deferred Tax Expense from Stock Options Exercised Entity Filer Category Entity Filer Category Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Amount