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Warranty Accrual - Warranty Accrual Activity (Detail) - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2023
Aug. 31, 2022
Aug. 31, 2021
Guarantees and Product Warranties [Abstract]      
Balance at beginning of period $ 24.0 $ 27.9 $ 45.2
Charged to cost of revenue 6.7 5.0 (8.0)
Payments (5.8) (7.9) (9.2)
Currency translation effect 0.7 (1.0) (0.1)
Balance at end of period $ 25.6 $ 24.0 $ 27.9