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Investments (Tables) | 12 Months Ended
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Sep. 30, 2025
Investments, Debt and Equity Securities [Abstract] |
Schedule of Investments | Our investments consist of (in millions):
|  | September 30,
|  | 2025 |  | 2024
Equity securities (other) |  | 105 |  |  | 106 |
Other |  | 77 |  |  | 63
Long-term investments |  | $ | 182 |  |  | $ | 169 |
Gain (Loss) on Securities | We record gains and losses on investments within the Change in fair value of investments line in the Consolidated Statement of Operations. The gains and losses on investments we recorded for the following periods were (in millions):
| 2025 |  | 2024 |  | 2023
Net gain on equity securities (level 1) | $ | — |  |  | $ | — |  |  | $ | 281 |
Net loss on equity securities (other) | (3) |  |  | (1) |  |  | (1) |
Equity method gain (loss) on Other investments | — |  |  | 1 |  |  | (1) |
Change in fair value of investments | (3) |  |  | — |  |  | 279 |
Total net realized gain on equity securities | — |  |  | — |  |  | 281 |
Total net unrealized loss on equity securities | $ | (3) |  |  | $ | (1) |  |  | $ | (1) |

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