INCOME TAXES	6 Months Ended
	Apr. 30, 2023
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	INCOME TAXESThe Company's effective tax rate was 19.3% in the first six months of fiscal 2023, as compared to 15.0% in the first six months of fiscal 2022. The increase in the Company's effective tax rate principally reflects a larger tax benefit from stock option 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 2023 and 2022 of $6.2 million and $17.8 million, respectively. This was partially offset by a favorable impact from tax-exempt unrealized gains in the cash surrender values of life insurance policies related to the HEICO Leadership Compensation Plan, net of the non-deductible portion related to executive compensation, in the first six months of fiscal 2023 as compared tax-exempt unrealized losses recognized in the first six months of fiscal 2022.The Company's effective tax rate decreased to 21.2% in the second quarter of fiscal 2023, as compared to 23.7% in the second quarter of fiscal 2022. The decrease in the Company's effective tax rate principally reflects a favorable impact from tax-exempt unrealized gains in the cash surrender values of life insurance policies related to the HEICO Leadership Compensation Plan, net of the non-deductible portion related to executive compensation, in the second quarter of fiscal 2023 as compared to tax-exempt unrealized losses recognized in the second quarter of fiscal 2022