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Equity-Based Awards (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Equity-based compensation expense [Abstract] |  |  |  |
Total compensation expense | $ 35.6 | $ 39.5 | $ 115.8 | $ 120.3
Phantom Unit Awards [Member] |  |  |  |
Equity-based compensation expense [Abstract] |  |  |  |
Total compensation expense | 35.0 | 37.3 | 111.0 | 113.1
Profits Interest Awards [Member] |  |  |  |
Equity-based compensation expense [Abstract] |  |  |  |
Total compensation expense | 0.6 | 2.2 | 4.7 | 7.2
Liability-classified awards [Member] |  |  |  |
Equity-based compensation expense [Abstract] |  |  |  |
Total compensation expense | $ 0.0 | $ 0.0 | $ 0.1 | $ 0.0

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