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Redeemable Noncontrolling Interests - Reconciliation of Noncontrolling Interests (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Noncontrolling Interest [Abstract]        
Net income attributable to nonredeemable noncontrolling interests $ 26.0 $ 13.3 $ 49.1 $ 33.0
Net income attributable to redeemable noncontrolling interests 2.7 1.5 5.1 3.5
Net income attributable to noncontrolling interests $ 28.7 $ 14.8 $ 54.2 $ 36.5