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Commitments and Contingencies (Details) $ in Millions |  |  |  |  | 9 Months Ended
--- | --- | --- | --- | --- | ---
Aug. 12, 2019 statement | May 17, 2019 patent | May 01, 2019 patent | Apr. 30, 2018 executive | May 31, 2020 USD ($) | May 31, 2019 USD ($)
Commitments and Contingencies Disclosure [Abstract] |  |  |  |  |  |
Standard warranty term |  |  |  |  | 5 years |
Movement in Standard Product Warranty Accrual [Roll Forward] |  |  |  |  |  |
Beginning balance |  |  |  |  | $ 11.5 | $ 27.3
Warranty and recall costs |  |  |  |  | 21.5 | 12.9
Payments and other deductions |  |  |  |  | (19.7) | (14.2)
Acquired warranty and recall liabilities |  |  |  |  | 0.1 | 0.0
ASC 606 adjustments |  |  |  |  | 0.0 | (14.8)
Ending balance |  |  |  |  | $ 13.4 | $ 11.2
Lighting Science Group Patent Litigation |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of patents allegedly to have been infringed | patent |  | 7 | 8 |  |  |
Number of allegations dropped | patent |  | 1 |  |  |  |
Securities Class Action |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of former executives alleged to be in violation | executive |  |  |  | 1 |  |
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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