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INVESTMENTS IN VARIABLE INTEREST ENTITIES (Details) - USD ($)
$ in Millions
 1 Months Ended 3 Months Ended 13 Months Ended
Mar. 31, 2023
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2024
Dec. 31, 2023
Apr. 30, 2021
Variable Interest Entity [Line Items]            
Assets   $ 9,736.3   $ 9,736.3 $ 9,363.2  
Liabilities   2,549.9   2,549.9 2,643.8  
Carrying value of non-marketable equity securities   88.7   88.7 87.6  
Payment for acquisition options   10.8 $ 15.0      
Investee            
Variable Interest Entity [Line Items]            
Maximum secured promissory note           $ 45.0
Investee drew additional amount   30.0   30.0 30.0  
Carrying value of non-marketable equity securities   42.8   42.8 39.3  
Investment option to acquire   20.9   20.9 13.1  
Maximum additional required investment   3.0   3.0    
Maximum additional option to acquire investment   6.6   6.6    
Variable Interest Entity, Primary Beneficiary            
Variable Interest Entity [Line Items]            
Assets   266.9   266.9 272.1  
Liabilities   $ 28.5   28.5 $ 31.5  
Investee | Variable Interest Entity, Not Primary Beneficiary            
Variable Interest Entity [Line Items]            
Loans receivables, maximum lending amount $ 45.0          
Payment for acquisition options       $ 30.0    
Investee | Variable Interest Entity, Not Primary Beneficiary | Convertible Promissory Note            
Variable Interest Entity [Line Items]            
Financing receivable $ 5.0   $ 5.0