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Partners' Capital and Distributions - Preferred Unit Distributions (Details) - USD ($) $ / shares in Units, $ in Millions	May 17, 2021	May 14, 2021	Feb. 12, 2021	Mar. 31, 2021
Series A Preferred Units | Cash Distribution
Partners Capital and Distribution [Line Items]
Preferred unit distribution amount			$ 37.0
Preferred distributions per unit (in dollars per unit)			$ 0.525
Series A Preferred Units | Cash Distribution | Forecast
Partners Capital and Distribution [Line Items]
Preferred unit distribution amount		$ 37.0
Preferred distributions per unit (in dollars per unit)		$ 0.525
Series B Preferred Units | Other current liabilities
Partners Capital and Distribution [Line Items]
Amount accrued to distributions payable				$ 18.0
Series B Preferred Units | Cash Distribution | Forecast
Partners Capital and Distribution [Line Items]
Preferred unit distribution amount	$ 24.5
Preferred distributions per unit (in dollars per unit)	$ 30.625

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Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).

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Aggregate dividends paid during the period for each share of preferred stock outstanding.

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