Earnings Per Share - Calculation of Pro Forma Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Income from continuing operations attributable to controlling interests	$ 17.8	$ 42.9	$ 70.2	$ 86.1
Net income from discontinued operations attributable to controlling interests	0.0	186.6	0.0	703.1
Net income attributable to controlling interests	17.8	229.5	70.2	789.2
Less: Total income available to participating unvested securities	0.0	0.0	0.0	(0.1)
Net income attributable to common stock	$ 17.8	$ 229.5	$ 70.2	$ 789.1
Denominator:
Weighted-average shares of common stock outstanding—basic (in shares)	41,431,729	79,606,810	42,266,420	79,427,030
Potential shares of common stock:
Weighted average diluted common stock outstanding (in shares)	42,353,442	83,244,575	43,390,502	82,831,508
Basic
Continuing operations (in dollars per share)	$ 0.43	$ 0.54	$ 1.66	$ 1.08
Discontinued operations (in dollars per share)	0	2.34	0	8.85
Basic earnings per share of common stock attributable to controlling interests (in dollars per share)	0.43	2.88	1.66	9.93
Diluted
Continuing operations (in dollars per share)	0.42	0.52	1.62	1.04
Discontinued operations (in dollars per share)	0	2.24	0	8.49
Diluted earnings per share of common stock attributable to controlling interests (in dollars per share)	$ 0.42	$ 2.76	$ 1.62	$ 9.53
Restricted stock units
Potential shares of common stock:
Restricted stock units/Employee stock options (in shares)	14,294	34,587	10,542	31,177
Employee stock options
Potential shares of common stock:
Restricted stock units/Employee stock options (in shares)	907,419	3,603,178	1,113,540	3,373,301