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Revenue - Standard Product Warranty (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]    
Balance at beginning of period $ 34.2 $ 10.5
Provision for warranty accrual 71.1 38.8
Warranty claims (53.9) (15.0)
Balance at end of period $ 51.5 $ 34.2