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Equity-Based Awards (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Equity-based compensation expense [Abstract] |  |  |  |
Total compensation expense | $ 41.1 | $ 41.7 | $ 80.2 | $ 80.8
Phantom Unit Awards [Member] |  |  |  |
Equity-based compensation expense [Abstract] |  |  |  |
Total compensation expense | 38.0 | 39.6 | 76.0 | 75.8
Profits Interest Awards [Member] |  |  |  |
Equity-based compensation expense [Abstract] |  |  |  |
Total compensation expense | 3.0 | 2.1 | 4.1 | 5.0
Liability-classified awards [Member] |  |  |  |
Equity-based compensation expense [Abstract] |  |  |  |
Total compensation expense | $ 0.1 | $ 0.0 | $ 0.1 | $ 0.0

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