Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2024	Oct. 31, 2023
Earnings Per Share [Abstract]
Net income available to common stockholders, basic	$ 258	$ 242	$ 453	$ 473
Net income available to common stockholders, diluted	$ 258	$ 242	$ 453	$ 473
Share data (in thousands):
Basic average common shares outstanding	472,660	479,200	472,647	479,262
Dilutive effect of stock-based awards	397	915	350	972
Diluted average common shares outstanding	473,057	480,115	472,997	480,234
Basic earnings per share (dollars per share)	$ 0.55	$ 0.50	$ 0.96	$ 0.99
Diluted earnings per share (dollars per share)	$ 0.55	$ 0.50	$ 0.96	$ 0.98