Income Taxes - Schedule of Changes in Deferred Tax Asset Valuation Allowance (Details) - Deferred tax asset valuation allowance - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 1,070	$ 1,078	$ 902
Additions Charged to Costs and Expenses			163
Deductions Charged to Costs and Expenses	(929)	(10)
Other (Deductions)/ Additions	0	2	13
Balance at End of Period	$ 141	$ 1,070	$ 1,078