Stock-Based Compensation SSARs (Details) - Stock Appreciation Rights (SARs) [Member] $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Apr. 30, 2024 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding, beginning balance | shares	4,010
Granted | shares	336
Exercised | shares	(568)
Forfeited or expired | shares	(28)
Outstanding, ending balance | shares	3,750
Exercisable | shares	2,617
Weighted Average Exercise Price [Roll Forward]
Weighted average exercise price, beginning | $ / shares	$ 51.76
Weighted average exercise price, grants in period | $ / shares	69.69
Weighted average exercise price, exercises in period | $ / shares	37.85
Weighted average exercise price, forfeitures and expirations in period | $ / shares	64.63
Weighted average exercise price, ending | $ / shares	55.37
Weighted average exercise price, exercisable | $ / shares	$ 48.54
Weighted Average Remaining Contractual Term (years)	4 years 7 months 6 days
Weighted Average Remaining Contractual Term (years)	3 years 4 months 24 days
SSARs outstanding, Aggregate Intrinsic Value | $	$ 12
SSARs exercisable, Aggregate Intrinsic Value | $	$ 12