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Investments (Tables) | 12 Months Ended
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Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract] |
Schedule of Investments | Our investments consist of (in millions):
|  | September 30,
|  | 2024 |  | 2023
Fixed income securities |  | $ | 0.3 |  |  | $ | 0.6 |
Equity securities (other) |  | 105.9 |  |  | 96.0 |
Other |  | 62.8 |  |  | 61.1
Total investments |  | 169.0 |  |  | 157.7 |
Less: Short-term investments (1) |  | (0.3) |  |  | (0.6) |
Long-term investments |  | $ | 168.7 |  |  | $ | 157.1 |
(1) Short-term investments are included in Other current assets in the Consolidated Balance Sheet.
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):
| 2024 |  | 2023 |  | 2022
Net gain (loss) on equity securities (level 1) | $ | — |  |  | $ | 281.7 |  |  | $ | (136.4) |
Net (loss) gain on equity securities (other) | (0.8) |  |  | (1.3) |  |  | 15.1 |
Equity method gain (loss) on Other investments | 0.9 |  |  | (1.1) |  |  | (15.6) |
Change in fair value of investments | 0.1 |  |  | 279.3 |  |  | (136.9) |
Total net realized gain on equity securities | — |  |  | 281.7 |  |  | 44.6 |
Total net unrealized loss on equity securities | $ | (0.8) |  |  | $ | (1.3) |  |  | $ | (165.9) |

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- Definition Tabular disclosure of realized and unrealized gain (loss) on investment in security. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(9)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
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