Stock-Based Compensation SSARs (Details) - Stock Appreciation Rights (SARs) [Member] $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Apr. 30, 2023 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding, beginning balance (shares) | shares	4,232
SSARs granted (shares) | shares	387
SSARs exercised (shares) | shares	(579)
SSARs forfeited or expired (shares) | shares	(30)
Outstanding, ending balance (shares) | shares	4,010
SSARs exercisable (shares) | shares	2,758
Weighted Average Exercise Price [Roll Forward]
Weighted average exercise price, beginning (dollars per share) | $ / shares	$ 47.54
Weighted average exercise price, grants in period (dollars per share) | $ / shares	73.61
Weighted average exercise price, exercises in period (dollars per share) | $ / shares	34.58
Weighted average exercise price, forfeitures and expirations in period (dollars per share) | $ / shares	70.63
Weighted average exercise price, ending (dollars per share) | $ / shares	51.76
Weighted average exercise price, exercisable (dollars per share) | $ / shares	$ 43.23
SSARs outstanding, Weighted Average Remaining Contractual Term (years)	4 years 9 months 18 days
SSARs exercisable, Weighted Average Remaining Contractual Term (years)	3 years 6 months
SSARs outstanding, Aggregate Intrinsic Value | $	$ 60
SSARs exercisable, Aggregate Intrinsic Value | $	$ 60