v3.26.1
Stock-Based Compensation (Tables)
 12 Months Ended
Apr. 30, 2026
Share-Based Payment Arrangement [Abstract]  
Share-based Payment Arrangement, Stock Appreciation Right, Activity [Table Text Block] The following table presents information about SSARs outstanding as of April 30, 2026, and for the year then ended.
Number of
SSARs
(in thousands)		Weighted-
Average
Exercise Price
per SSAR		Weighted-
Average
Remaining
Contractual
Term (years)		Aggregate
Intrinsic Value
Outstanding at April 30, 2025
3,878 $55.29 
Granted897 31.10 
Exercised— — 
Forfeited or expired(722)41.16 
Outstanding at April 30, 2026
4,053 $52.45 5.3$— 
Exercisable at April 30, 2026
2,331 $59.62 3.2$— 
Schedule of Share-Based Payment Award, Stock Appreciation Rights, Valuation Assumptions [Table Text Block] The weighted-average grant-date fair values and related valuation assumptions for the SSARS granted during each of the last three years were as follows:
Year Ended April 30,202420252026
Grant-date fair value$21.69 $12.86 $8.19 
Valuation assumptions:
Expected term (years)7.07.06.9
Risk-free interest rate4.1 %4.1 %4.1 %
Expected volatility25.0 %26.1 %28.6 %
Expected dividend yield1.2 %1.9 %2.9 %
Share-Based Payment Arrangement, PBRSU, Activity [Table Text Block]
The following table presents information about PBRSUs outstanding as of April 30, 2026, and for the year then ended.
Number of
PBRSUs
(in thousands)		Weighted-
Average
Fair Value at
Grant Date
Outstanding at April 30, 2025
638 $59.53 
Granted1,042 29.21 
Adjusted for performance and dividends(48)84.71 
Converted to common shares(54)84.72 
Forfeited(37)63.66 
Outstanding at April 30, 2026
1,541 $37.93 
Schedule of Share-Based Payment Award, Performance Based Restricted Stock Units, Valuation Assumptions [Table Text Block] The following table shows the assumptions used in the Monte Carlo simulation model to value the awards granted during each of the last three years.
Year Ended April 30,202420252026
Valuation assumptions:
Risk-free interest rate4.6 %4.3 %3.8 %
Expected volatility22.2 %24.6 %30.4 %
Expected dividend yield1.2 %1.9 %2.9 %
Remaining performance period (years) as of grant date2.82.82.8
Share-based Payment Arrangement, Performance Based Restricted Stock Units, Activity [Table Text Block] The following table presents information about RSUs outstanding as of April 30, 2026, and for the year then ended.
Number of
RSUs
(in thousands)		Weighted-
Average
Fair Value at
Grant Date
Outstanding at April 30, 2025
208 $51.51 
Granted201 31.01 
Additions for dividend equivalents9 40.08 
Converted to common shares(80)53.33 
Forfeited(12)37.03 
Outstanding at April 30, 2026
326 $38.62 
Grant Date Fair Values of DSUs [Table Text Block] The weighted average grant-date fair values for these awards granted during each of the last three years were as follows:
Year Ended April 30,202420252026
Grant-date fair value$71.23 $45.99 $30.91 
Share-based Payment Arrangement, Cost by Plan [Table Text Block] The pre-tax stock-based compensation expense and related deferred income tax benefits recognized during the last three years were as follows:
Year Ended April 30,202420252026
Pre-tax compensation expense$25 $28 $32 
Deferred tax benefit3 3 5 
Stock-Based Awards, Other Information [Table Text Block] Further information related to our stock-based awards for the last three years is as follows:
Year Ended April 30,202420252026
Intrinsic value of SSARs exercised$12 $— $— 
Fair value of shares vested4 5 6 
Tax benefit from exercise / vesting of awards
3 1 1