Income Taxes - Schedule of Income Before Tax Expense by U.S. and Foreign Jurisdictions (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest [Abstract]
U.S.	$ 2,274	$ 3,052	$ 2,097
Foreign	4	9	7
Income before income tax expense	$ 2,278	$ 3,061	$ 2,104