REDEEMABLE NONCONTROLLING INTERESTS (Details Textuals) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2023	Apr. 30, 2025	May 31, 2024	Jan. 05, 2023	Oct. 31, 2022
Temporary Equity Disclosure [Abstract]
Aggregate Redemption Amount Puttable	$ 191,400
Potential Redemption Amount Payable	94,600
Business Combination [Line Items]
Acquisitions of noncontrolling interests	$ (5,800)	$ (26,600)	$ (2,700)
FY2020 Acquisition Subsidiary 1 [Member] | Flight Support Group [Member]
Business Combination [Line Items]
Percentage of Voting Interests Sold	10.00%
FY2020 Acquisition Subsidiary 1 [Member] | Flight Support Group [Member] | Heico Corporation
Business Combination [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	90.00%
FY2006 Acquisition Subsidiary 1 | Flight Support Group [Member] | Noncontrolling equity holder
Business Combination [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	19.90%
FY2006 Acquisition Subsidiary 1 | Flight Support Group [Member] | Heico Corporation
Business Combination [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	85.10%
Rosen | HEICO Electronic [Member]
Business Combination [Line Items]
Business Combination, Voting Equity Interest Acquired, Percentage	100.00%
Subsidiary Twenty-Six | Flight Support Group [Member]
Business Combination [Line Items]
Business Combination, Voting Equity Interest Acquired, Percentage	85.10%
Subsidiary Twenty-Six | Electronic Technologies Group [Member] | Heico Corporation
Business Combination [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	92.40%			87.90%
FY 2019 Acquisition 1 | Electronic Technologies Group [Member] | Noncontrolling equity holder
Business Combination [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	15.00%
FY 2019 Acquisition 1 | Electronic Technologies Group [Member] | Heico Corporation
Business Combination [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	92.50%
Millennium | HFSC
Business Combination [Line Items]
Business Combination, Voting Equity Interest Acquired, Percentage	90.00%
Millennium | Existing Management [Member] | HFSC
Business Combination [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	10.00%
Millennium | Flight Support Group [Member]
Business Combination [Line Items]
Business Combination, Voting Equity Interest Acquired, Percentage	90.00%
FY 2015 Acquisition [Member] | Flight Support Group [Member] | Noncontrolling equity holder
Business Combination [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	19.90%
FY 2015 Acquisition [Member] | Flight Support Group [Member] | Heico Corporation
Business Combination [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	95.00%
SVM | HEICO Electronic [Member]
Business Combination [Line Items]
Business Combination, Voting Equity Interest Acquired, Percentage	70.00%
SVM | Existing Management [Member] | HEICO Electronic [Member]
Business Combination [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	30.00%
Exxelia | HEICO Electronic [Member]
Business Combination [Line Items]
Business Combination, Voting Equity Interest Acquired, Percentage						93.69%
Exxelia | Existing Management [Member] | HEICO Electronic [Member]
Business Combination [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners						6.31%
Exxelia | Electronic Technologies Group [Member] | Heico Corporation
Business Combination [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	90.69%
FY 2017 Acquisition [Member] | Flight Support Group [Member]
Business Combination [Line Items]
Business Combination, Voting Equity Interest Acquired, Percentage					9.95%
FY 2017 Acquisition [Member] | Flight Support Group [Member] | Noncontrolling equity holder
Business Combination [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners							19.90%