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Incentive Plans - Schedule of Compensation Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Long-term incentive units |  |  |  |  |
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] |  |  |  |  |
Deferred compensation, expensed | $ 3.6 | $ 6.4 | $ 6.4 | $ 11.6 |
Deferred compensation, capitalized |  |  |  | 0.1 |
Unearned Compensation | 23.2 |  | $ 23.2 |  | $ 20.7
Expected period to recognize unearned compensation (in years) |  |  | 2 years 4 months 24 days |  |
Market-based performance awards |  |  |  |  |
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] |  |  |  |  |
Deferred compensation, expensed | 1.3 | 5.6 | $ 5.4 | 10.6 |
Deferred compensation, capitalized | 0.1 | 0.1 | 0.1 | 0.3 |
Unearned Compensation | 31.2 |  | $ 31.2 |  | 30.3
Expected period to recognize unearned compensation (in years) |  |  | 2 years 6 months |  |
Service Based Restricted Stock Units |  |  |  |  |
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] |  |  |  |  |
Deferred compensation, expensed | 8.3 | 6.8 | $ 16.0 | 12.1 |
Deferred compensation, capitalized | 1.4 | 1.4 | 2.5 | 2.4 |
Unearned Compensation | 0.4 |  | $ 0.4 |  | 55.4
Expected period to recognize unearned compensation (in years) |  |  | 2 years 10 months 24 days |  |
Interxion awards |  |  |  |  |
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] |  |  |  |  |
Deferred compensation, expensed | 0.6 | $ 1.1 | $ 1.3 | $ 2.0 |
Unearned Compensation | $ 84.0 |  | $ 84.0 |  | $ 1.9
Expected period to recognize unearned compensation (in years) |  |  | 4 months 24 days |  |

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