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Commitments and Contingencies (Details) $ in Millions |  | 9 Months Ended
--- | --- | ---
Aug. 12, 2019 statement | May 31, 2021 USD ($) | May 31, 2020 USD ($)
Commitments and Contingencies Disclosure [Abstract] |  |  |
Standard warranty term |  | 5 years |
Movement in Standard Product Warranty Accrual [Roll Forward] |  |  |
Beginning balance |  | $ 16.1 | $ 11.5
Warranty and recall costs |  | 23.8 | 21.5
Payments and other deductions |  | (21.2) | (19.7)
Acquired warranty and recall liabilities |  | 0.0 | 0.1
Ending balance |  | $ 18.7 | $ 13.4
Securities Class Action |  |  |
Loss Contingencies [Line Items] |  |  |
Number of statements used as basis for dismissing claims | statement | 42 |  |
Total number of statements challenged in the Consolidated Complaint | statement | 47 |  |
Number of challenged statements allowed to proceed to discovery | statement | 5 |  |

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