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Investments (Tables) | 9 Months Ended
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Jun. 30, 2025
Investments [Abstract] |
Summary of investments | Investments consisted of the following:
(in millions) |  | June 30, 2025 |  | September 30, 2024
Investments, at fair value |  |  |  |
Sponsored funds and separate accounts |  | $ | 752.9 |  |  | $ | 509.1 |
Investments related to long-term incentive plans |  | 261.1 |  |  | 271.6 |
Other equity and debt investments |  | 66.6 |  |  | 57.3 |
Total investments, at fair value |  | 1,080.6 |  |  | 838.0 |
Investments in equity method investees |  | 1,157.9 |  |  | 1,219.7 |
Other investments |  | 381.9 |  |  | 280.7 |
Total |  | $ | 2,620.4 |  |  | $ | 2,338.4 |

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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References No definition available. + Details
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