Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 100	$ 259	$ 576	$ 687
Share data (in thousands):
Basic average common shares outstanding	479,152	478,887	479,121	478,844
Dilutive effect of stock-based awards	1,308	1,680	1,361	1,755
Diluted average common shares outstanding	480,460	480,567	480,482	480,599
Basic earnings per share (dollars per share)	$ 0.21	$ 0.54	$ 1.20	$ 1.43
Diluted earnings per share (dollars per share)	$ 0.21	$ 0.54	$ 1.20	$ 1.43