Share-Based Payments (Details 3) - $ / shares	12 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2023
Restricted Shares And Deferred Stock Units [Member]
Weighted-average grant date fair values of the equity awards
Restricted Shares and Deferred Stock Units and Performance Units	186,895	155,354	146,290
Weighted-Average Grant Date Fair Value Per Share	$ 111.44	$ 143.60	$ 131.96
Performance Units [Member]
Weighted-average grant date fair values of the equity awards
Restricted Shares and Deferred Stock Units and Performance Units	157,329	117,312	130,939
Weighted-Average Grant Date Fair Value Per Share	$ 117.74	$ 153.20	$ 133.01