Leases - Schedule of Lease Costs and Supplemental Cash Flows Information (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2023 |
|
| Lease costs | |||
| Total lease costs | $ 146 | $ 147 | $ 145 |
| Supplemental cash flows information | |||
| Operating cash flows from operating leases | 125 | 126 | 119 |
| ROU assets obtained in exchange for operating lease liabilities | 19 | 36 | 568 |
| Sublease income | $ 15 | $ 15 | 15 |
| Corporate Headquarters | |||
| Supplemental cash flows information | |||
| ROU assets obtained in exchange for operating lease liabilities | $ 540 | ||