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Revenue - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Jun. 30, 2020
Disaggregation of Revenue [Line Items]          
Allowable product return period (in days)     30 days    
Standard product warranty period (in years)     1 year    
Customer deposits $ 321.5   $ 321.5   $ 341.5
Deferred revenue $ 42.2   42.2   $ 22.1
Revenue recognized that was previously included in deferred revenue     $ 22.1 $ 9.5  
United States | Revenue Benchmark | Geographic Concentration Risk          
Disaggregation of Revenue [Line Items]          
Percentage of total revenue 87.00% 94.00% 90.00% 94.00%  
Minimum          
Disaggregation of Revenue [Line Items]          
Extended product warranty period (in months)     12 months    
Maximum          
Disaggregation of Revenue [Line Items]          
Extended product warranty period (in months)     27 months