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Warranty Accrual - Warranty Accrual Activity (Detail) - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2022
Aug. 31, 2021
Aug. 31, 2020
Guarantees and Product Warranties [Abstract]      
Balance at beginning of period $ 27.9 $ 45.2 $ 46.7
Charged to cost of revenue 5.0 (8.0) 4.0
Payments (7.9) (9.2) (6.2)
Currency translation effect (1.0) (0.1) 0.7
Balance at end of period $ 24.0 $ 27.9 $ 45.2