Discontinued Operations - Summary of Significant Non Cash Operating Items and Capital Expenditures of Discontinued Operations Included in Consolidated Statements of Cash Flows (Detail) - USD ($) $ in Thousands		12 Months Ended
		May 31, 2024	May 31, 2023	May 31, 2022
Significant non-cash operating items:
Impairment of long-lived assets		$ 32,975	$ 484
Equity in income of unconsolidated affiliate, net of distributions		(5,722)	(79,870)	$ 113,583
Net gain on sale of asset		28,980	(4,458)	(16,150)
Stock-based compensation		16,688	19,178	16,100
Significant investing activities:
Investment in property, plant and equipment		(47,421)	(38,683)	(58,158)
Acquisitions, net of cash acquired		(42,035)	(56,088)	(376,713)
Significant financing activities
Net proceeds from short-term borrowings	[1]	172,187	(45,183)	41,726
Discontinued Operations
Significant non-cash operating items:
Depreciation and amortization		32,043	66,826	56,184
Impairment of long-lived assets		1,401	2,112	3,076
Equity in income of unconsolidated affiliate, net of distributions		(12,735)	4,775	(27,287)
Net gain on sale of asset		(412)	(3,348)	(15,123)
Stock-based compensation		3,533	4,612	3,626
Significant investing activities:
Investment in property, plant and equipment		(33,457)	$ (46,577)	(36,422)
Acquisitions, net of cash acquired		(21,013)		$ (376,713)
Significant financing activities
Net proceeds from short-term borrowings		$ 172,187

[1] Net proceeds in fiscal 2024 consisted of borrowings under short-term credit facilities assumed by Worthington Steel in conjunction with the Separation.