Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Earnings Per Share [Abstract]
Net income available to common stockholders, basic	$ 1,024	$ 783	$ 838
Net income available to common stockholders, diluted	$ 1,024	$ 783	$ 838
Share data (in thousands):
Basic average common shares outstanding (shares)	476,394	479,155	478,879
Dilutive effect of stock-based awards (shares)	826	1,310	1,686
Diluted average common shares outstanding (shares)	477,220	480,465	480,565
Basic earnings per share (dollars per share)	$ 2.15	$ 1.63	$ 1.75
Diluted earnings per share (dollars per share)	$ 2.14	$ 1.63	$ 1.74
Antidilutive common stock-based awards excluded from calculation of diluted earnings per share (shares)	1,689	1,107	691