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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