Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023
Earnings Per Share [Abstract]
Net income available to common stockholders, basic	$ 285	$ 100	$ 758	$ 576
Net income available to common stockholders, diluted	$ 285	$ 100	$ 758	$ 576
Share data (in thousands):
Basic average common shares outstanding	474,806	479,152	477,542	479,121
Dilutive effect of stock-based awards	760	1,308	902	1,361
Diluted average common shares outstanding	475,566	480,460	478,444	480,482
Basic earnings per share (dollars per share)	$ 0.60	$ 0.21	$ 1.59	$ 1.20
Diluted earnings per share (dollars per share)	$ 0.60	$ 0.21	$ 1.58	$ 1.20