Short-Term Investments - Additional Information (Details)	3 Months Ended
	Sep. 30, 2023 USD ($) InvestmentPosition	Sep. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)
Schedule Of Available For Sale Securities [Line Items]
Accrued interest receivable	$ 4,600,000		$ 4,300,000
Short-term investments mature within one year	867,200,000		758,100,000
Short-term investments mature thereafter	$ 252,300,000		$ 285,000,000
Percentage of short-term investments maturing within one year	77.00%		73.00%
Percentage of short-term investments maturing thereafter	23.00%		27.00%
Number of investments in unrealized loss positions | InvestmentPosition	200
Number of investment positions | InvestmentPosition	354
Debt securities, continuous unrealized loss position, less than 12 months	$ 585,100,000		$ 506,500,000
Debt securities, continuous unrealized loss position, 12 months or longer	103,500,000		$ 100,200,000
Short-term investments realized gains or losses	$ 0	$ 0