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Redeemable Noncontrolling Interests - Redeemable Noncontrolling Interests Activity (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Roll Forward]        
Balance at beginning of period     $ 42.2  
Net income attributable to noncontrolling interests $ 1.5 $ 2.7 3.4 $ 5.1
Distributions declared (20.5) (23.0) (45.4) (45.4)
Balance at end of period 43.3   43.3  
Redeemable Noncontrolling Interest        
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Roll Forward]        
Balance at beginning of period     42.2 31.6
Net income attributable to noncontrolling interests     3.4 5.1
Distributions declared     (2.3) (4.4)
Purchase of redeemable noncontrolling interests     0.0 0.6
Balance at end of period $ 43.3 $ 32.9 $ 43.3 $ 32.9