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Inventories - Inventory Valuation (Detail) - Inventory Valuation Reserve - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2024
Aug. 31, 2023
Aug. 31, 2022
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of period $ 17.2 $ 14.1 $ 19.9
Charge to cost of revenue 1.2 5.4 1.5
Disposition of inventory (12.2) (2.7) (6.9)
Currency translation effect 0.1 0.4 (0.4)
Balance at end of period $ 6.3 $ 17.2 $ 14.1