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REDEEMABLE NONCONTROLLING INTERESTS (Details Textuals) - USD ($) $ in Millions | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 31, 2024 | Oct. 31, 2023 | Oct. 31, 2022 | May 31, 2024 | Jan. 31, 2023 | Jan. 05, 2023 | May 31, 2022 | Oct. 31, 2019
Temporary Equity Disclosure [Abstract] |  |  |  |  |  |  |  |
Aggregate Redemption Amount Puttable | $ 194.2 |  |  |  |  |  |  |
Potential Redemption Amount Payable | 91.0 |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquisitions of noncontrolling interests | $ (26.6) | $ (2.7) | $ (8.7) |  |  |  |  |
Exxelia | HEICO Electronic [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent | 90.69% |  |  |  |  |  |  |
Flight Support Group [Member] | FY2018 Acquisition 1 |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent | 90.00% |  |  |  |  |  |  |
Percentage of Voting Interests Sold |  |  | 10.00% |  |  |  |  |
Flight Support Group [Member] | FY 2015 Acquisition [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  | 19.90% |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent | 90.05% |  |  |  |  |  |  |
Flight Support Group [Member] | FY 2017 Acquisition [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  | 19.90% |  |  |  |  |
Electronic Technologies Group [Member] | FY 2019 Acquisition 1 |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  |  |  | 15.00%
Noncontrolling Interest, Ownership Percentage by Parent | 88.75% |  |  |  |  |  |  |
FY 2017 Acquisition [Member] | Flight Support Group [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  | 9.95% |  |  | 9.95% |
Exxelia | HEICO Electronic [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  | 93.69% | 93.69% |  |
Exxelia | Existing Management [Member] | HEICO Electronic [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  | 6.31% |  |
Alcon | HEICO Electronic [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  | 90.00% |  |
Alcon | Existing Management [Member] | HEICO Electronic [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  | 10.00% |  |

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