v3.26.3
Investments - Schedule of Net Earnings of Unconsolidated Affiliate (Detail) - USD ($)
$ in Millions
3 Months Ended
Aug. 31, 2026
Aug. 31, 2025
Investments in and Advances to Affiliates, Activity [Line Items]    
Equity in net income of unconsolidated affiliate $ 5.3 $ 6.4
Serviacero Worthington    
Investments in and Advances to Affiliates, Activity [Line Items]    
Equity in net income of unconsolidated affiliate $ 5.3 $ 6.4