Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2025	Jan. 31, 2024
Earnings Per Share [Abstract]
Net income available to common stockholders, basic	$ 270	$ 285	$ 723	$ 758
Net income available to common stockholders, diluted	$ 270	$ 285	$ 723	$ 758
Share data (in thousands):
Basic average common shares outstanding	472,661	474,806	472,651	477,542
Dilutive effect of stock-based awards	225	760	309	902
Diluted average common shares outstanding	472,886	475,566	472,960	478,444
Basic earnings per share (dollars per share)	$ 0.57	$ 0.60	$ 1.53	$ 1.59
Diluted earnings per share (dollars per share)	$ 0.57	$ 0.60	$ 1.53	$ 1.58