Discontinued Operations - Summary of Financial Results from Discontinued Operations of Worthington Steel (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Nov. 30, 2023	Nov. 30, 2023
Other income (expense):
Net earnings attributable to noncontrolling interest	$ 10,233	$ 83,106
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	788,689	1,670,027
Cost of goods sold	728,252	1,481,731
Gross profit	60,437	188,296
Selling, general and administrative expense	37,106	74,909
Impairment of long-lived assets		1,401
Separation costs	14,895	18,521
Operating income	8,436	93,465
Other income (expense):
Miscellaneous income, net	305	1,017
Interest expense, net	(1,697)	(3,706)
Equity in net income of unconsolidated affiliate	3,778	12,735
Earnings before income taxes	10,822	103,511
Income tax expense	589	20,405
Net earnings	10,233	83,106
Net earnings attributable to noncontrolling interest	3,865	7,461
Net earnings attributable to controlling interest	$ 6,368	$ 75,645