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Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
Income Taxes - Narrative (Details) - USD ($)	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Tax Credit Carryforward [Line Items]
Valuation allowance	$ 3,383,071,000	$ 3,549,451,000	$ 3,300,000,000
Operating loss carryforwards	663,400,000
Federal foreign tax credits	59,000,000.0
Unrecognized tax benefits	178,746,000	136,882,000	104,453,000	$ 122,302,000
Current income tax receivables	68,000,000.0	15,800,000
Unrecognized tax benefits that would impact effective tax rate	14,800,000	400,000	10,900,000
Income tax examination, penalties and interest expense	0	0	0
Income tax examination, penalties and interest accrued	0	$ 0	$ 0
Income Tax Jurisdiction, Domestic Federal
Tax Credit Carryforward [Line Items]
Federal foreign tax credits	97,100,000
Tax Credit Carried Forward Indefinitely
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	565,800,000
Tax Credit Carried Forward Expire Date
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	200,000
Polish R&D Credits
Tax Credit Carryforward [Line Items]
Unrecognized tax benefits	16,800,000
Income Tax Jurisdiction, Domestic State and Local
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	566,000,000.0
Federal foreign tax credits	135,700,000
Income Tax Jurisdiction, Foreign
Tax Credit Carryforward [Line Items]
Operating loss carryforwards	400,000
Federal foreign tax credits	$ 277,900,000