Employee Incentive Plans - Restricted and Performance Awards (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		3 Months Ended
	Mar. 31, 2022	Jan. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Unvested restricted units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested, beginning of period (in shares)			7,507,471
Granted (in shares)	193,935		1,761,711
Vested (in shares)			(1,032,738)
Forfeited (in shares)			(2,022)
Non-vested, end of period (in shares)	8,234,422		8,234,422
Aggregate intrinsic value, end of period	$ 79.5		$ 79.5
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Non-vested, beginning of period (in dollars per share)			$ 5.46
Granted (in dollars per share)			8.87
Vested (in dollars per share)			10.35
Forfeited (in dollars per share)			3.71
Non-vested, end of period (in dollars per share)	$ 5.58		$ 5.58
Incentive unit award vesting period			3 years
Units withheld for payroll taxes (in shares)			278,866
Aggregate intrinsic value of units vested			$ 7.6	$ 3.0
Fair value of units vested	$ 1.7		10.7	10.2
Unrecognized compensation cost related to non-vested restricted incentive units	$ 24.5		$ 24.5
Unrecognized compensation costs, weighted average period for recognition			2 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Grants in period	193,935		1,761,711
Performance units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested, beginning of period (in shares)			3,574,827
Granted (in shares)			598,286
Vested (in shares)			(708,361)
Non-vested, end of period (in shares)	3,464,752		3,464,752
Aggregate intrinsic value, end of period	$ 33.4		$ 33.4
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Non-vested, beginning of period (in dollars per share)			$ 6.40
Granted (in dollars per share)			11.45
Vested (in dollars per share)			15.57
Non-vested, end of period (in dollars per share)	$ 5.40		$ 5.40
Units withheld for payroll taxes (in shares)			273,357
Aggregate intrinsic value of units vested			$ 5.6	0.6
Fair value of units vested			11.0	$ 4.4
Unrecognized compensation cost related to non-vested restricted incentive units	$ 15.5		$ 15.5
Unrecognized compensation costs, weighted average period for recognition			1 year 10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Grant-date fair value (in dollars per share)	$ 11.90	$ 4.70
Beginning TSR Price (in dollars per share)	$ 8.83	$ 3.71
Risk-free interest rate	2.15%	0.17%
Volatility factor	75.00%	71.00%
Grants in period			598,286
Performance units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Percent of units vesting			0.00%
Performance units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Percent of units vesting			200.00%
Performance Shares With Vesting Conditions
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted (in shares)			88,863
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Grant-date fair value (in dollars per share)	$ 8.90
Grants in period			88,863