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SHAREHOLDERS' EQUITY
 9 Months Ended
Jul. 31, 2026
Stockholders' Equity Note [Abstract]  
Equity [Text Block] SHAREHOLDERS' EQUITY
Consistent with the Company's strategy of increasing its ownership in certain majority-owned subsidiaries, in June 2026, through a subsidiary of HEICO Electronic, the Company acquired the remaining equity interest in SST Components, Inc., which operates as VPT Components. The purchase price for the remaining equity interest was paid in cash using cash provided by operating activities and included a $12.2 million accrual representing the estimated fair value of contingent consideration. The acquisition of the remaining equity interest was accounted for as an equity transaction, and the Company did not recognize any gain or loss in connection with the transaction. See Note 8, Fair Value Measurements, for additional information regarding the Company's contingent consideration obligation.