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Earnings Per Share (Tables)
 12 Months Ended
Apr. 30, 2025
Earnings Per Share [Abstract]  
Computation of basic earnings per common share under two-class method
The following table sets forth the computation of basic earnings per share and diluted earnings per share under the two-class method.
  Year Ended April 30,
  202520242023
Net income (loss)$(1,230.8)$744.0 $(91.3)
Less: Net income (loss) allocated to participating securities(0.1)0.2 (0.1)
Net income (loss) allocated to common stockholders$(1,230.7)$743.8 $(91.2)
Weighted-average common shares outstanding106.4 104.1 106.2 
Add: Dilutive effect of stock options— 0.1 — 
Weighted-average common shares outstanding – assuming dilution106.4 104.2 106.2 
Net income (loss) per common share$(11.57)$7.14 $(0.86)
Net income (loss) per common share – assuming dilution$(11.57)$7.14 $(0.86)
Computation of diluted earnings per common share under two-class method
The following table sets forth the computation of basic earnings per share and diluted earnings per share under the two-class method.
  Year Ended April 30,
  202520242023
Net income (loss)$(1,230.8)$744.0 $(91.3)
Less: Net income (loss) allocated to participating securities(0.1)0.2 (0.1)
Net income (loss) allocated to common stockholders$(1,230.7)$743.8 $(91.2)
Weighted-average common shares outstanding106.4 104.1 106.2 
Add: Dilutive effect of stock options— 0.1 — 
Weighted-average common shares outstanding – assuming dilution106.4 104.2 106.2 
Net income (loss) per common share$(11.57)$7.14 $(0.86)
Net income (loss) per common share – assuming dilution$(11.57)$7.14 $(0.86)
Computation of earnings per common share, basic and diluted
The following table sets forth the computation of diluted earnings per share under the treasury stock method.
Year Ended April 30,
202520242023
Net income (loss)$(1,230.8)$744.0 $(91.3)
Weighted-average common shares outstanding – assuming dilution:
Weighted-average common shares outstanding106.4 104.1 106.2 
Add: Dilutive effect of stock options— 0.1 — 
Add: Dilutive effect of restricted shares, restricted stock units, and performance units— 0.2 — 
Weighted-average common shares outstanding – assuming dilution106.4 104.4 106.2 
Net income (loss) per common share – assuming dilution$(11.57)$7.13 $(0.86)