Stock-Based Compensation - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
		May 31, 2024	May 31, 2023	May 31, 2022
Stock Options
Outstanding, beginning of year		573	602	602
Converted to Worthington Steel common shares	[1]	(61)
Separation related adjustment		255
Granted		58	84	55
Exercised		(297)	(113)	(53)
Forfeited		(7)		(2)
Outstanding, end of year		521	573	602
Exercisable at end of year		401	418	447
Weighted Average Exercise Price
Outstanding, beginning of year		$ 42.61	$ 39.66	$ 36.44
Converted to Worthington Steel common shares	[1]	51.44
Granted		68.68	46.39	60.19
Exercised		31.98	29.71	23.8
Forfeited		45.91		44.69
Outstanding, end of year		29.67	42.61	39.66
Exercisable at end of year		$ 27.23	$ 40.84	$ 37.68
Weighted Average Remaining Contractual Life (in years)
Outstanding		4 years 1 month 9 days	5 years 5 months 19 days	5 years 1 month 24 days
Exercisable		2 years 9 months 25 days	4 years 4 months 17 days	4 years 1 month 2 days
Aggregate intrinsic value
Outstanding		$ 14,245	$ 7,970	$ 4,987
Exercisable		$ 11,945	$ 6,472	$ 4,065

[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.