v3.26.1
Stock-Based Compensation - Summary of Stock Option Activity (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
May 31, 2026
May 31, 2025
May 31, 2024
Stock Options      
Outstanding, beginning of year 421,618 520,480 573,330
Converted to Worthington Steel common shares [1]     (61,032)
Separation related adjustment     254,361
Granted 0 54,200 58,000
Exercised (31,763) (151,646) (296,664)
Forfeited   (1,416) (7,515)
Outstanding, end of year 389,855 421,618 520,480
Exercisable at end of year 359,640 360,948 400,879
Weighted Average Exercise Price      
Outstanding, beginning of year $ 33.11 $ 29.67 $ 42.61
Converted to Worthington Steel common shares [1]     51.44
Granted   44.38 68.68
Exercised 28.28 25.29 31.98
Forfeited   37.08 45.91
Outstanding, end of year 33.51 33.11 29.67
Exercisable at end of year $ 32.39 $ 31.34 $ 27.23
Weighted Average Remaining Contractual Life (in years)      
Outstanding 2 years 3 months 29 days 3 years 2 months 26 days 4 years 1 month 9 days
Exercisable 1 year 10 months 17 days 2 years 4 months 13 days 2 years 9 months 25 days
Aggregate intrinsic value      
Outstanding $ 9,075 $ 10,877 $ 14,245
Exercisable $ 8,770 $ 9,952 $ 11,945
[1] Effective as of the Distribution, each outstanding stock option held by a then-current or former employee or service provider of

Worthington Steel was converted into a stock option denominated in the common shares of Worthington Steel.