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GOODWILL AND INTANGIBLE ASSETS (Tables)
 3 Months Ended
Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill and Intangible Assets
Goodwill and intangible assets consist of the following:

(in millions)3/31/202512/31/2024
Goodwill$2,642.8 $2,642.8 
Indefinite-lived intangible assets - trade name86.0 86.0 
Indefinite-lived intangible assets - investment advisory agreements65.6 65.6 
Definite-lived intangible assets - investment advisory agreements192.1 216.5 
Total$2,986.5 $3,010.9 
Schedule of Definite-Lived Intangible Assets, Future Amortization Expense Estimated amortization expense for the definite-lived intangible assets for the five succeeding years is as follows:
(in millions)
Remaining 2025
$58.9 
202659.9 
202741.1 
202811.8 
20298.8