v3.26.1
Income Taxes (Effective Tax Rate Reconciliation - post ASU adoption) (Details) - USD ($)
$ in Millions
12 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Apr. 30, 2024
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]      
U.S. federal statutory rate $ 186    
State taxes, net of U.S. federal tax benefit [1] 9    
Tax benefit from foreign-derived sales (25)    
Subpart F income, net of credits (4)    
Other cross border effects (12)    
Tax credits (6)    
Valuation allowances 9    
Nontaxable or nondeductible items 5    
Changes in unrecognized tax benefits (2)    
Other, net 1    
Effective rate $ 170 $ 212 $ 274
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
U.S. federal statutory rate 21.00% 21.00% 21.00%
State taxes, net of U.S. federal tax benefit 1.00% [1] 1.70% 1.30%
Foreign tax effects   1.50% 0.50%
Tax benefit from foreign-derived sales (2.90%) (2.80%) (1.70%)
Subpart F income, net of credits (0.50%)    
Other cross border effects (1.30%)    
Tax credits (0.70%)    
Valuation allowances 1.00% 1.40% 0.10%
Nontaxable or nondeductible items 0.60%    
Changes in unrecognized tax benefits (0.30%)    
Other, net 0.20% (1.50%) 0.40%
Effective rate 19.30% 19.60% 21.20%
Effective Income Tax Rate Reconciliation, State and Local Jurisdiction, Contribution Greater than 50 Percent, Tax Effect [Extensible Enumeration] TENNESSEE    
SPAIN      
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Foreign tax effects $ (16)    
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Foreign tax effects (1.70%)    
Foreign Tax Jurisdiction, Other      
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Foreign tax effects $ 25    
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Foreign tax effects 2.90%    
[1] Tennessee comprised more than 50% of the state taxes, net of U.S. federal income tax benefit.