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Significant Accounting Policies - Inventories (Details) - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2022
Aug. 31, 2021
Aug. 31, 2020
Inventory, Net [Abstract]      
Raw materials, supplies, and work in process $ 252.6 $ 209.5  
Finished goods 264.0 227.2  
Inventories excluding reserves 516.6 436.7  
Less: Reserves (30.9) (38.0)  
Total inventories 485.7 398.7  
Inventory reserves:      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Year 38.0 49.3 $ 22.3
Additions to reserve 15.7 21.4 36.3
Disposals of reserved inventory (22.5) (32.7) (11.1)
Foreign currency translation adjustments (0.3) 0.0 1.8
Balance at End of Year $ 30.9 $ 38.0 $ 49.3