Earnings Per Share - Calculation of Pro Forma Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator:
Income from continuing operations attributable to controlling interests	$ 23.8	$ 18.5
Net income from discontinued operations attributable to controlling interests	0.0	8.5
Net income attributable to controlling interests	$ 23.8	$ 27.0
Denominator:
Weighted-average shares of common stock outstanding—basic (in shares)	43,969,713	79,319,556
Potential shares of common stock:
Weighted-average shares of common stock outstanding—diluted (in shares)	45,327,390	82,320,668
Basic
Continuing operations (in dollars per share)	$ 0.54	$ 0.23
Discontinued operations (in dollars per share)	0	0.11
Basic earnings per share of common stock attributable to controlling interests (in dollars per share)	0.54	0.34
Diluted
Continuing operations (in dollars per share)	0.53	0.22
Discontinued operations (in dollars per share)	0	0.11
Diluted earnings per share of common stock attributable to controlling interests (in dollars per share)	$ 0.53	$ 0.33
Restricted stock units
Potential shares of common stock:
Restricted stock units/Employee stock options (in shares)	10,112	35,621
Employee stock options
Potential shares of common stock:
Restricted stock units/Employee stock options (in shares)	1,347,565	2,965,491