Commitments and Contingencies - Schedule of Commitments by Fiscal Year Maturity (Detail) - USD ($) $ in Millions	Sep. 30, 2023	Jun. 30, 2023
Loss Contingencies [Line Items]
Total borrowings	$ 2,970	$ 2,967
Borrowings
Loss Contingencies [Line Items]
Total borrowings	2,954
Borrowings, payments due Less than 1 year	35
Borrowings, Payments due 1-3 years	622
Borrowings, Payments due 3-5 years	797
Borrowings, Payments due More than 5 years	1,500
Interest payments on borrowings
Loss Contingencies [Line Items]
Interest payments on borrowings, Total	712
Interest payments on borrowings, Payments due Less than 1 year	151
Interest payments on borrowings, Payments due 1-3 years	266
Interest payments on borrowings, Payments due 3-5 years	167
Interest payments on borrowings, Payments due More than 5 years	$ 128