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Incentive Plans - Schedule of Compensation Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Long-term incentive units |  |  |  |  |
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] |  |  |  |  |
Deferred compensation, expensed | $ 4.0 | $ 3.7 | $ 11.5 | $ 10.1 |
Deferred compensation, capitalized |  | 0.1 | 0.1 | 0.1 |
Unearned Compensation | $ 26.0 |  | 26.0 |  | $ 16.6
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 | $ 3.5 | 3.1 | 9.2 | 8.6 |
Deferred compensation, capitalized |  | 0.1 | 0.1 | 0.2 |
Unearned Compensation | $ 27.6 |  | 27.6 |  | 19.9
Expected period to recognize unearned compensation (in years) | 0 years |  |  |  |
Service Based Restricted Stock Units |  |  |  |  |
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] |  |  |  |  |
Deferred compensation, expensed | $ 9.2 | 8.2 | 25.6 | 24.1 |
Deferred compensation, capitalized | 0.8 | 1.8 | 3.6 | 4.4 |
Unearned Compensation | $ 78.3 |  | 78.3 |  | $ 66.4
Expected period to recognize unearned compensation (in years) | 2 years 7 months 6 days |  |  |  |
Interxion awards |  |  |  |  |
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] |  |  |  |  |
Deferred compensation, expensed |  | $ 0.3 |  | 1.6 |
Deferred compensation, capitalized |  |  | $ 0.1 | $ 0.1 |
Expected period to recognize unearned compensation (in years) | 0 years |  |  |  |

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