Stock-Based Compensation SSARs Fair Value Assumptions (Details) - Stock Appreciation Rights (SARs) [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]
Grant-date fair value	$ 21.69	$ 20.67	$ 16.61
Expected term (years)	7 years	7 years	7 years
Risk-free interest rate (percent)	4.10%	2.70%	1.00%
Expected volatility (percent)	25.00%	24.80%	24.10%
Expected dividend yield (percent)	1.20%	1.00%	1.00%