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Inventories - Components of Inventories (Detail) - USD ($)
$ in Millions
Aug. 31, 2024
Aug. 31, 2023
Inventory Disclosure [Abstract]    
Manufacturing supplies and raw materials $ 532.6 $ 638.2
Work-in-process 152.0 138.2
Finished goods 92.6 64.4
Excess and obsolete adjustment 6.3 17.2
Inventories $ 770.9 $ 823.6