Commitments and Contingencies - Schedule of Commitments by Fiscal Year Maturity (Details) - USD ($) $ in Millions	Dec. 31, 2023	Jun. 30, 2023
Loss Contingencies [Line Items]
Total borrowings	$ 3,042	$ 2,967
Borrowings
Loss Contingencies [Line Items]
Total borrowings	3,029
Borrowings, payments due Less than 1 year	36
Borrowings, Payments due 1-3 years	694
Borrowings, Payments due 3-5 years	799
Borrowings, Payments due More than 5 years	1,500
Interest payments on borrowings
Loss Contingencies [Line Items]
Interest payments on borrowings, Total	686
Interest payments on borrowings, Payments due Less than 1 year	155
Interest payments on borrowings, Payments due 1-3 years	269
Interest payments on borrowings, Payments due 3-5 years	153
Interest payments on borrowings, Payments due More than 5 years	$ 109