Stockholders' Equity (Details) - USD ($) $ in Millions	3 Months Ended
	Jul. 31, 2025	Jul. 31, 2024
Beginning balance	$ 3,993	$ 3,517
Net income	170	195
Net other comprehensive income (loss)	36	(43)
Declaration of cash dividends	(214)	(206)
Stock-based compensation expense	4	4
Stock issued under compensation plans	5	3
Loss on issuance of treasury stock issued under compensation plans	(6)	(5)
Ending balance	3,988	3,465
Additional Paid-in Capital [Member]
Beginning balance	36	13
Stock-based compensation expense	4	4
Loss on issuance of treasury stock issued under compensation plans	(6)	(5)
Ending balance	34	12
Retained Earnings [Member]
Beginning balance	4,710	4,261
Net income	170	195
Declaration of cash dividends	(214)	(206)
Loss on issuance of treasury stock issued under compensation plans
Ending balance	4,666	4,250
AOCI Attributable to Parent [Member]
Beginning balance	(220)	(221)
Net other comprehensive income (loss)	36	(43)
Ending balance	(184)	(264)
Treasury Stock, Common [Member]
Beginning balance	(605)	(608)
Stock issued under compensation plans	5	3
Ending balance	(600)	(605)
Common stock, Class A, voting [Member] | Common Stock [Member]
Beginning balance	25	25
Ending balance	25	25
Common stock, Class B, nonvoting [Member] | Common Stock [Member]
Beginning balance	47	47
Ending balance	$ 47	$ 47