Stock-Based Compensation DSUs (Details) - Deferred Stock Units (DSUs) [Member] - $ / shares	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	181,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	159,000
Grant-date fair value	$ 71.23	$ 72.10	$ 67.35