v3.26.1
Stockholders' Equity (Details) - USD ($)
$ in Millions
 3 Months Ended
Jul. 31, 2026
Jul. 31, 2025
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance $ 4,020 $ 3,993
Net income 176 170
Net other comprehensive income (loss) (16) 36
Declaration of cash dividends (212) (214)
Stock-based compensation expense 4 4
Stock issued under compensation plans 6 5
Loss on issuance of treasury stock issued under compensation plans (9) (6)
Ending balance 3,969 3,988
Additional Paid-in Capital [Member]    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance 62 36
Stock-based compensation expense 4 4
Loss on issuance of treasury stock issued under compensation plans (9) (6)
Ending balance 57 34
Retained Earnings [Member]    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance 4,998 4,710
Net income 176 170
Declaration of cash dividends (212) (214)
Ending balance 4,962 4,666
AOCI Attributable to Parent [Member]    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance (108) (220)
Net other comprehensive income (loss) (16) 36
Ending balance (124) (184)
Treasury Stock, Common [Member]    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance (1,004) (605)
Stock issued under compensation plans 6 5
Ending balance (998) (600)
Common stock, Class A, voting [Member] | Common Stock [Member]    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance 25 25
Ending balance 25 25
Common stock, Class B, nonvoting [Member] | Common Stock [Member]    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance 47 47
Ending balance $ 47 $ 47