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Divestitures - Additional Information (Details) - USD ($)
12 Months Ended
Aug. 31, 2025
Aug. 31, 2024
Aug. 31, 2023
Jan. 05, 2023
Impaired Long-Lived Assets Held and Used [Line Items]        
Asset impairment, disposal, and exit costs, net     $ 46,700,000  
Gunderson        
Impaired Long-Lived Assets Held and Used [Line Items]        
Carrying value of long-lived assets       $ 44,000,000
Fair value of long-lived assets       $ 19,800,000
Rayvag        
Impaired Long-Lived Assets Held and Used [Line Items]        
Interest in joint venture     68.00%  
Asset impairment, disposal, and exit costs, net $ 0 $ 0 $ 46,700,000  
Manufacturing        
Impaired Long-Lived Assets Held and Used [Line Items]        
Asset impairment, disposal, and exit costs, net     46,700,000  
Manufacturing | Gunderson        
Impaired Long-Lived Assets Held and Used [Line Items]        
Impairment of long-lived assets     24,200,000  
Gain (loss) on sale     (14,400,000)  
Severance     2,100,000  
Manufacturing | Southwest Steel        
Impaired Long-Lived Assets Held and Used [Line Items]        
Gain (loss) on sale     (9,700,000)  
Manufacturing | Rayvag        
Impaired Long-Lived Assets Held and Used [Line Items]        
Gain (loss) on sale     $ 3,700,000