v3.26.1
Investments - Schedule of Financial Position of Unconsolidated Affiliate (Detail) - USD ($)
$ in Millions
May 31, 2026
May 31, 2025
May 31, 2024
May 31, 2023
Investments in and Advances to Affiliates [Line Items]        
Cash and cash equivalents $ 84.6 $ 38.0 $ 40.2 $ 32.7
Total assets 2,252.4 1,961.8    
Current liabilities 775.8 631.5    
Other noncurrent liabilities 51.5 32.8    
Equity 1,063.3 1,074.1    
Total liabilities, mezzanine equity and equity 2,252.4 1,961.8    
Serviacero Worthington        
Investments in and Advances to Affiliates [Line Items]        
Cash and cash equivalents 24.3 16.0    
Other current assets 221.8 219.4    
Noncurrent assets 61.9 62.2    
Total assets 308.0 297.6    
Current liabilities 57.6 40.5    
Other noncurrent liabilities 4.7 5.0    
Equity 245.7 252.1    
Total liabilities, mezzanine equity and equity $ 308.0 $ 297.6