Stock-Based Compensation - Summary of Stock Option Activity (Detail) shares in Thousands	9 Months Ended
	Feb. 29, 2024 $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Beginning Balance	573
Converted to Worthington Steel common shares	(61)	[1]
Separation related adjustment	254
Granted	58
Exercised	(126)
Forfeited	(7)
Outstanding, Ending Balance	691
Weighted Average Exercise Price
Outstanding, Beginning Balance | $ / shares	$ 42.61
Converted to Worthington Steel common shares | $ / shares	51.44	[1]
Granted | $ / shares	68.68
Exercised | $ / shares	39.73
Forfeited | $ / shares	45.91
Outstanding, Ending Balance | $ / shares	$ 28.83

[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.