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Affiliated Equity - Additional Information (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Affiliate Equity [Line Items]      
Distributions paid to affiliate partners $ 260.9 $ 249.1  
Payments to acquire interest in affiliates 65.9 249.6  
Issuance of interest in affiliates 18.1 $ 17.1  
Other assets      
Affiliate Equity [Line Items]      
Due from affiliates 15.5   $ 9.6
Other liabilities      
Affiliate Equity [Line Items]      
Due to affiliates $ 47.7   $ 22.0