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Earnings Per Share - Schedule of Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($)
shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Numerator    
Net income (controlling interest) $ 149.8 $ 134.5
Income from hypothetical settlement of Redeemable non-controlling interests, net of taxes 13.0 0.7
Interest expense on junior convertible securities, net of taxes 3.4 3.4
Net income (controlling interest), as adjusted $ 166.2 $ 138.6
Denominator    
Average shares outstanding (basic) (in shares) 32.8 35.9
Effect of dilutive instruments:    
Stock options and restricted stock units (in shares) 2.0 2.0
Issuance of shares to settle Redeemable non-controlling interests (in shares) 3.6 0.3
Junior convertible securities (in shares) 1.7 1.7
Average shares outstanding (diluted) (in shares) 40.1 39.9