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Income Taxes (Effective Tax Rate Reconciliation) (Details)
12 Months Ended
Apr. 30, 2023
Apr. 30, 2022
Apr. 30, 2021
Reconciles our effective tax rate to the federal statutory tax rate in the United States      
U.S. federal statutory rate 21.00% 21.00% 21.00%
State taxes, net of U.S. federal tax benefit 2.50% 1.00% 2.40%
Income taxed at other than U.S. federal statutory rate 3.00% 1.30% 0.30%
Prior intercompany sales taxed at higher than current U.S. federal statutory rate 1.00% 2.00% 0.20%
Tax benefit from foreign-derived sales (3.00%) (1.80%) (1.70%)
Adjustments related to prior years (0.50%) 0.70% (0.20%)
Excess tax benefits from stock-based awards (0.30%) (0.50%) (1.00%)
Tax rate changes 0.00% 0.40% 0.00%
Intercompany transfer of assets 0.00% 0.00% (4.00%)
Valuation allowance (1.30%) 0.00% 0.00%
Other, net 0.60% 0.70% (0.50%)
Effective rate 23.00% 24.80% 16.50%