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Incentive Plans - Schedule of Compensation Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Long-term incentive units |  |  |  |  |
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] |  |  |  |  |
Deferred compensation, expensed | $ 5.1 | $ 2.8 | $ 16.7 | $ 8.7 |
Deferred compensation, capitalized | 0.0 |  | 0.1 | 0.2 |
Unearned Compensation | 28.9 |  | $ 28.9 |  | $ 19.8
Expected period to recognize unearned compensation (in years) |  |  | 2 years 2 months 12 days |  |
Market-based performance awards |  |  |  |  |
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] |  |  |  |  |
Deferred compensation, expensed | 5.5 | 6.4 | $ 16.1 | 21.3 |
Deferred compensation, capitalized | 0.1 | 0.2 | 0.4 | 0.6 |
Unearned Compensation | 41.3 |  | $ 41.3 |  | 39.2
Expected period to recognize unearned compensation (in years) |  |  | 2 years 1 month 6 days |  |
Service Based Restricted Stock Units |  |  |  |  |
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] |  |  |  |  |
Deferred compensation, expensed | 6.7 | 4.6 | $ 18.9 | 13.7 |
Deferred compensation, capitalized | 1.4 | 0.9 | 3.7 | 2.3 |
Unearned Compensation | 61.2 |  | $ 61.2 |  | 44.5
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 | 1.6 | $ 3.1 | $ 3.7 | $ 17.7 |
Unearned Compensation | $ 3.0 |  | $ 3.0 |  | $ 8.5
Expected period to recognize unearned compensation (in years) |  |  | 10 months 24 days |  |

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