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Financial Instruments and Fair Value Measurements - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024	Jun. 30, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities without readily determinable fair value, impairment loss, annual amount	$ 0	$ 0	$ 0	$ 1,800,000
Equity securities without readily determinable fair value, amount	54,600,000		54,600,000		$ 54,600,000
Auction rate security \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized (loss) gain on investments	0	0	0	0
Level 1 \| Investment in marketable equity security
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized (loss) gain on investments	(1,300,000)	$ (1,500,000)	(200,000)	$ (2,300,000)
Level 2 \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debt outstanding	107,000,000.0		107,000,000.0		$ 476,400,000
Level 2 \| Fair Value, Measurements, Recurring \| Convertible Senior Notes Due 2029 \| Convertible Notes Payable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of company's convertible debt	1,689,500,000		1,689,500,000
Level 2 \| Fair Value, Measurements, Recurring \| Convertible Senior Notes Due 2028 \| Convertible Notes Payable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of company's convertible debt	$ 730,400,000		$ 730,400,000