v3.26.1
Capital Stock and Stock-Based Awards - Schedule of stock option activity for the Class A Stock and Common Stock plans (Details)
$ / shares in Units, $ in Millions
 12 Months Ended
May 31, 2026
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Beginning balance, Outstanding (in shares) | shares 2,663,798
Granted (Shares) | shares 18,092
Exercised (Shares) | shares (779,167)
Expired, cancellations and forfeited (Shares) | shares (146,038)
Ending balance, Outstanding (in shares) | shares 1,756,685
Exercisable (Shares) at May 31, 2016 | shares 1,655,574
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]  
Beginning balance, Outstanding (in dollars per share) | $ / shares $ 30.90
Granted (in dollars per share) | $ / shares 21.38
Exercised (in dollars per share) | $ / shares 24.23
Expired, cancellations and forfeited (in dollars per share) | $ / shares 41.57
Ending balance, Outstanding at (in dollars per share) | $ / shares 32.87
Weighted Average Exercise Price, Exercisable at period end (in dollars per share) | $ / shares $ 32.79
Average Remaining Contractual Term (in years), Outstanding period end 2 years 7 months 6 days
Average Remaining Contractual Term (in years), Exercisable at period end 2 years 4 months 24 days
Aggregate Intrinsic Value, Outstanding at period end | $ $ 14.2
Aggregate Intrinsic Value, Exercisable at period end | $ $ 13.6