The Company and Significant Accounting Policies - Government Grants (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Government Grants, Reduction Recorded To Interest Expense	$ 0.9	$ 0.7	$ 0.9	$ 1.5
Government Grants, Reduction Recorded To Property, Plant And Equipment	0.1	0.1	1.2	0.1
Government Grants, Reduction Recorded To Operating Expenses	$ 0.2	$ 1.7	$ 0.2	$ 3.6