Short-Term Investments - Additional Information (Details)	12 Months Ended
	Jun. 30, 2023 USD ($) InvestmentPosition	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)
Schedule Of Available For Sale Securities [Line Items]
Debt Securities Available For Sale Accrued Interest After Allowance For Credit Loss Statement Of Financial Position Extensible List Not Disclosed Flag	accrued interest receivable
Accrued interest receivable	$ 4,300,000	$ 3,000,000
Short-term investments mature within one year	$ 758,100,000	$ 961,800,000
Percentage of short-term investments maturing within one year	73.00%	87.00%
Short-term investments mature thereafter	$ 285,000,000	$ 146,700,000
Percentage of short-term investments maturing thereafter	27.00%	13.00%
Number of investments in unrealized loss positions | InvestmentPosition	190
Unrealized losses, continuous realized loss position, less than 12 months	$ 506,500,000	$ 851,800,000
Unrealized losses, continuous realized loss position, 12 months or longer	100,200,000	0
Short-term investments realized gains or losses	0	0	$ 0
Allowance for credit losses on investments that were in an unrealized loss position	$ 0	$ 0
Minimum
Schedule Of Available For Sale Securities [Line Items]
Number of investment positions | InvestmentPosition	330