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Property, Plant and Equipment - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2025
Aug. 31, 2024
Aug. 31, 2023
Property, Plant and Equipment [Line Items]      
Depreciation expense $ 546.6 $ 474.8 $ 457.9
Superior Wisconsin      
Property, Plant and Equipment [Line Items]      
Depreciation expense $ 21.4