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INVESTMENTS - Total Assets, Liabilities and Non-controlling Interests (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Subsidiary or Equity Method Investee [Line Items]    
Assets $ 11,768.7 $ 12,509.0
Liabilities 2,031.1 2,255.3
Non-controlling interest 208.8 248.7
Variable interest entities    
Subsidiary or Equity Method Investee [Line Items]    
Assets 549.1 692.7
Liabilities 0.2 56.4
Non-controlling interest $ 208.8 $ 248.7