Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
Aug. 31, 2026	Aug. 31, 2025	May 31, 2025
Related Party Transaction [Line Items]
Net sales	$ 2,726.6	$ 872.9
Worthington Enterprises
Related Party Transaction [Line Items]
Net sales	19.3	$ 18.2
Accounts receivable	$ 8.9		$ 7.0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details