Employee Incentive Plans - Amounts Recognized in Consolidated Financial Statements (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2023 |
Mar. 31, 2022 |
|
| Allocation | ||
| Total unit-based compensation expense | $ 4.0 | $ 6.6 |
| Amount of related income tax benefit recognized in net income | 0.9 | 1.6 |
| Tax expense (benefit) | (6.5) | 2.0 |
| Restricted units | ||
| Allocation | ||
| Tax expense (benefit) | (6.5) | 2.0 |
| Cost of unit-based compensation charged to operating expense | ||
| Allocation | ||
| Total unit-based compensation expense | 0.9 | 1.6 |
| Cost of unit-based compensation charged to general and administrative expense | ||
| Allocation | ||
| Total unit-based compensation expense | $ 3.1 | $ 5.0 |