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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%