ENTITY INFORMATION - USD ($)	12 Months Ended
	Oct. 31, 2022	Apr. 30, 2022
Entity Information [Line Items]
Entity Central Index Key	0000046619
Current Fiscal Year End Date	--10-31
Entity File Number	001-04604
Entity Registrant Name	HEICO CORPORATION
Entity Incorporation, State or Country Code	FL
Entity Tax Identification Number	65-0341002
Entity Address, Address Line One	3000 Taft Street
Entity Address, City or Town	Hollywood
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33021
City Area Code	954
Local Phone Number	987-4000
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float		$ 15,871,879,000