Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Jul. 31, 2025	Jul. 31, 2024
Earnings Per Share [Abstract]
Net income available to common stockholders, basic	$ 170	$ 195
Net income available to common stockholders, diluted	$ 170	$ 195
Share data (in thousands):
Basic average common shares outstanding	472,724	472,637
Dilutive effect of stock-based awards	239	304
Diluted average common shares outstanding	472,963	472,941
Basic earnings per share (dollars per share)	$ 0.36	$ 0.41
Diluted earnings per share (dollars per share)	$ 0.36	$ 0.41