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The Company and Significant Accounting Policies - Government Grants Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Government grants, reduction recorded to interest expense $ 0.9 $ 3.0 $ 6.1
Government grants, reduction recorded to operating expenses 0.2 3.7 4.7
Government grants, reduction recorded to property, plant and equipment $ 1.4 $ 0.1 $ 1.3