ENTITY LISTING INFORMATION - $ / shares	12 Months Ended
	Oct. 31, 2023	Dec. 18, 2023
Heico Common Stock [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Common Stock, $.01 par value per share
Trading Symbol	HEI
Security Exchange Name	NYSE
Entity Listing, Par Value Per Share	$ 0.01
Entity Common Stock, Shares Outstanding		54,720,621
Common Class A [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Class A Common Stock, $.01 par value per share
Trading Symbol	HEI.A
Security Exchange Name	NYSE
Entity Listing, Par Value Per Share	$ 0.01
Entity Common Stock, Shares Outstanding		83,534,260