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The Company and Significant Accounting Policies - Government Grants Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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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

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