INCOME TAXES	3 Months Ended
	Jan. 31, 2022
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	INCOME TAXES    The Company's effective tax rate was 4.1% in the first quarter of fiscal 2022, as compared to 2.9% in the first quarter of fiscal 2021. The increase in the Company's effective tax rate reflects an unfavorable impact from tax-exempt unrealized losses in the cash surrender values of life insurance policies related to the HEICO Leadership Compensation Plan in the first quarter of fiscal 2022 as compared to tax-exempt unrealized gains recognized on such policies in the first quarter of fiscal 2021, partially offset by a larger tax benefit from stock options exercises recognized in the first quarter of fiscal 2022. The Company recognized a discrete tax benefit from stock option exercises in both the first quarter of fiscal 2022 and 2021 of $17.8 million and $13.5 million, respectively. The tax benefit from stock option exercises in both periods was the result of strong appreciation in HEICO's stock price during the optionees' holding periods.