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SELECTED FINANCIAL STATEMENT INFORMATION (Details Textuals) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Apr. 30, 2025 | Apr. 30, 2024 | Apr. 30, 2025 | Apr. 30, 2024 | Oct. 31, 2024
Selected Financial Statement Information (Details) [Abstract] |  |  |  |  |
Accrued customer rebates and credits | $ 28.1 |  | $ 28.1 |  | $ 24.3
Total customer rebates and credits deducted within net sales | $ 3.6 | $ 2.3 | $ 7.9 | $ 5.8 |
SVM | Heico Electronic Technologies Corp |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Business Combination, Voting Equity Interest Acquired, Percentage | 70.00% |  | 70.00% |  |
SVM | Existing Management | Heico Electronic Technologies Corp |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 30.00% |  | 30.00% |  |
FY 2015 Acquisition | Flight Support Group [Member] |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 19.90% |  | 19.90% |  |
Noncontrolling Interest, Ownership Percentage by Parent | 95.03% |  | 95.03% |  |
Millennium | HFSC |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Business Combination, Voting Equity Interest Acquired, Percentage | 90.00% |  | 90.00% |  |
Millennium | Existing Management | HFSC |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 10.00% |  | 10.00% |  |
2019 acquisition | Electronic Technologies Group [Member] |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 15.00% |  | 15.00% |  |
Noncontrolling Interest, Ownership Percentage by Parent | 92.50% |  | 92.50% |  |
Rosen | Heico Electronic Technologies Corp |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Business Combination, Voting Equity Interest Acquired, Percentage | 100.00% |  | 100.00% |  |
ETG Pre-Acquistion | Electronic Technologies Group [Member] |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent | 87.90% |  | 87.90% |  |

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