Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2026	Jan. 31, 2025
Earnings Per Share [Abstract]
Net income available to common stockholders, basic	$ 267	$ 270	$ 661	$ 723
Net income available to common stockholders, diluted	$ 267	$ 270	$ 661	$ 723
Share data (in thousands):
Basic average common shares outstanding	462,460	472,661	468,624	472,651
Dilutive effect of stock-based awards	397	225	328	309
Diluted average common shares outstanding	462,857	472,886	468,952	472,960
Basic earnings per share (dollars per share)	$ 0.58	$ 0.57	$ 1.41	$ 1.53
Diluted earnings per share (dollars per share)	$ 0.58	$ 0.57	$ 1.41	$ 1.53