Short-Term Investments - Additional Information (Details)	3 Months Ended	9 Months Ended
	Mar. 31, 2023 USD ($) InvestmentPosition	Mar. 31, 2023 USD ($) InvestmentPosition	Jun. 30, 2022 USD ($)
Schedule Of Available For Sale Securities [Line Items]
Accrued interest receivable	$ 3,900,000	$ 3,900,000	$ 3,000,000
Short-term investments mature within one year	856,700,000	856,700,000	961,800,000
Short-term investments mature thereafter	$ 216,300,000	$ 216,300,000	$ 146,700,000
Percentage of short-term investments maturing within one year	80.00%	80.00%	87.00%
Percentage of short-term investments maturing thereafter	20.00%	20.00%	13.00%
Number of investments in unrealized loss positions | InvestmentPosition	160	160
Number of investment positions | InvestmentPosition		330
Debt securities, continuous unrealized loss position, less than 12 months	$ 286,600,000	$ 286,600,000	$ 851,800,000
Debt securities, continuous unrealized loss position, 12 months or longer	123,500,000	123,500,000	0
Short-term investments realized gains or losses	0	0
Allowance for credit losses on investments that were in an unrealized loss position	$ 0	$ 0	$ 0