Discontinued Operations - Summary of Financial Results from Discontinued Operations of Worthington Steel (Detail) $ in Thousands	3 Months Ended
	Aug. 31, 2023 USD ($)
Other income (expense):
Net earnings attributable to noncontrolling interest	$ 72,872
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	881,338
Cost of goods sold	753,479
Gross profit	127,859
Selling, general and administrative expense	37,802
Impairment of long-lived assets	1,401
Separation costs	3,626
Operating income	85,030
Other income (expense):
Miscellaneous income, net	710
Interest expense, net	(2,009)
Equity in net income of unconsolidated affiliate	8,957
Earnings before income taxes	92,688
Income tax expense	19,816
Net earnings	72,872
Net earnings attributable to noncontrolling interest	3,597
Net earnings attributable to controlling interest	$ 69,275