v3.26.1
Acquisitions - Summary of Consideration Transferred and Fair Values Assigned to Assets Acquired and Liabilities Assumed (Detail)
€ in Millions, $ in Millions
 12 Months Ended
Jun. 03, 2025
USD ($)
Jun. 03, 2025
EUR (€)
May 31, 2026
USD ($)
May 31, 2025
USD ($)
May 31, 2024
USD ($)
Recognized amounts of identifiable assets acquired and liabilities assumed          
Goodwill     $ 44.5 $ 79.6 $ 79.6
Sitem Group          
Consideration Transferred          
Cash Consideration     44.2    
Contingent Consideration - Cash $ 4.7 € 4.2 2.6    
Subtotal     46.8    
Contingent Capital Contribution - Cash 11.3 € 10.0 0.3    
Subtotal     5.4    
Business combination contribution from subsidiary     12.0    
Total Consideration Transferred     64.2    
Total Consideration Transferred     64.2    
Recognized amounts of identifiable assets acquired and liabilities assumed          
Cash and cash equivalents     42.6    
Receivables     39.6    
Inventories     40.4    
Deferred income tax assets     3.2    
Prepaid expenses     4.9    
Operating lease right-of-use assets     16.5    
Finance lease right-of-use assets     8.6    
Property, plant and equipment     98.8    
Intangible assets     24.0    
Other Assets     1.0    
Total identifiable assets     279.6    
Accounts payable     (34.7)    
Accrued compensation and related taxes     (9.3)    
Current operating lease liabilities     (2.7)    
Current finance lease liabilities     (2.4)    
Noncurrent operating lease liabilities     (13.9)    
Noncurrent finance lease liabilities     (6.2)    
Current maturities of long-term debt and short-term debt     (25.9)    
Deferred income tax liabilities     (16.4)    
Long-term debt     (25.3)    
Pension and other postretirement benefit obligations     (14.3)    
Other non-current liabilities     (1.9)    
Total identifiable liabilities     (153.0)    
Sitem Group - Net identifiable assets     126.6    
Goodwill 17.5   17.5    
Total - Sitem Group     144.1    
Contribution of Tempel's electrical steel subsidiary in Nagold, Germany     12.0    
Redeemable NCI - Net Put option     (10.7)    
Redeemable NCI     (69.2)    
Total - Redeemable NCI (81.8)   (79.9)    
Cash Capital Contribution     $ 5.1    
Sitem Group | Preliminary Valuation          
Consideration Transferred          
Cash Consideration 44.2        
Contingent Consideration - Cash 4.7        
Subtotal 48.9        
Contingent Capital Contribution - Cash 0.3        
Subtotal 5.4        
Business combination contribution from subsidiary 12.0        
Total Consideration Transferred 66.3        
Total Consideration Transferred 66.3        
Recognized amounts of identifiable assets acquired and liabilities assumed          
Cash and cash equivalents 42.6        
Receivables 39.6        
Inventories 40.4        
Deferred income tax assets 3.2        
Prepaid expenses 4.9        
Operating lease right-of-use assets 16.5        
Finance lease right-of-use assets 8.6        
Property, plant and equipment 98.8        
Intangible assets 24.0        
Other Assets 1.0        
Total identifiable assets 279.6        
Accounts payable (34.7)        
Accrued compensation and related taxes (9.3)        
Current operating lease liabilities (2.7)        
Current finance lease liabilities (2.4)        
Noncurrent operating lease liabilities (13.9)        
Noncurrent finance lease liabilities (6.2)        
Current maturities of long-term debt and short-term debt (25.9)        
Deferred income tax liabilities (16.9)        
Long-term debt (25.3)        
Pension and other postretirement benefit obligations (14.3)        
Other non-current liabilities (1.9)        
Total identifiable liabilities (153.5)        
Sitem Group - Net identifiable assets 126.1        
Goodwill 22.0        
Total - Sitem Group 148.1        
Contribution of Tempel's electrical steel subsidiary in Nagold, Germany 12.0        
Redeemable NCI - Net Put option (10.7)        
Redeemable NCI (71.1)        
Total - Redeemable NCI (81.8)        
Cash Capital Contribution 5.1        
Sitem Group | Measurement Period Adjustments          
Consideration Transferred          
Contingent Consideration - Cash (2.1)        
Subtotal (2.1)        
Total Consideration Transferred (2.1)        
Total Consideration Transferred (2.1)        
Recognized amounts of identifiable assets acquired and liabilities assumed          
Deferred income tax liabilities 0.5        
Total identifiable liabilities 0.5        
Sitem Group - Net identifiable assets 0.5        
Goodwill (4.5)        
Total - Sitem Group (4.0)        
Redeemable NCI 1.9        
Total - Redeemable NCI $ 1.9