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SHAREHOLDERS EQUITY SHAREHOLDERS EQUITY (Details Textuals)
$ in Millions
9 Months Ended
Jul. 31, 2019
USD ($)
HEICO Aerospace [Member]  
Business Acquisition [Line Items]  
Noncontrolling Interest, Ownership Percentage by Parent 80.00%
Ownership Percentage by Noncontrolling Owners 20.00%
Eight Acquired FSG Subsidiaries [Member] | Flight Support Group [Member]  
Business Acquisition [Line Items]  
Percentage of Voting Interests Acquired 20.00%
Business Combination, Consideration Transferred $ 91.5