v3.26.1
Earnings Per Share (Details 1) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Apr. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Net income (loss) $ (138.7) $ (1,230.8) $ 744.0
Net income (loss) per common share - assuming dilution (in dollars per share) $ (1.30) $ (11.57) $ 7.13
Treasury Stock Method      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Net income (loss) $ (138.7) $ (1,230.8) $ 744.0
Weighted-average common shares outstanding (in shares) 106.7 106.4 104.1
Weighted-average common shares outstanding – assuming dilution (in shares) 106.7 106.4 104.4
Net income (loss) per common share - assuming dilution (in dollars per share) $ (1.30) $ (11.57) $ 7.13
Employee Stock Option [Member] | Treasury Stock Method      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Add: Dilutive effect (in shares) 0.0 0.0 0.1
Restricted shares, restricted stock units, and performance units | Treasury Stock Method      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Add: Dilutive effect (in shares) 0.0 0.0 0.2