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Investments (Tables)
9 Months Ended
Jun. 30, 2023
Investments [Abstract]  
Summary of investments
Investments consisted of the following:
(in millions)June 30,
2023
September 30,
2022
Investments, at fair value
Sponsored funds and separate accounts$616.6 $413.0 
Investments related to long-term incentive plans202.3 143.3 
Other equity and debt investments48.4 57.2 
Total investments, at fair value867.3 613.5 
Investments in equity method investees1,118.5 771.5 
Other investments263.3 266.3 
Total$2,249.1 $1,651.3