CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2021
Class A
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock dividend (in dollars per share)	$ 1.39	$ 1.38	$ 1.37
Class B
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock dividend (in dollars per share)	$ 1.39	$ 1.38	$ 1.37