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Partners' Capital and Distributions - Preferred Unit Distributions (Details) - USD ($) $ / shares in Units, $ in Millions	Nov. 15, 2023	Nov. 14, 2023	Aug. 15, 2023	Aug. 14, 2023	May 15, 2023	Feb. 15, 2023	Feb. 14, 2023	Jan. 31, 2023	Sep. 30, 2023	Nov. 15, 2022
Series A Preferred Units
Partners Capital and Distribution
Distribution rate reset, basis spread on variable rate (as a percent)								5.85%
Quarterly distributions per unit (usd per unit)								$ 0.615
Series A Preferred Units | Cash Distribution
Partners Capital and Distribution
Preferred distributions per unit (usd per unit)				$ 0.615	$ 0.585		$ 0.525
Preferred unit distribution amount				$ 44	$ 42		$ 37
Series A Preferred Units | Cash Distribution | Forecast
Partners Capital and Distribution
Preferred distributions per unit (usd per unit)		$ 0.615
Preferred unit distribution amount		$ 44
Series B Preferred Units
Partners Capital and Distribution
Preferred stock, liquidation preference (dollars per unit)										$ 1,000
Preferred unit, distribution percentage spread (as a percent)			4.11%							4.11%
Preferred unit, credit percentage spread (as a percent)			0.26121%
Series B Preferred Units | Cash Distribution
Partners Capital and Distribution
Preferred distributions per unit (usd per unit)			$ 24.10		$ 22.18	$ 22.27
Preferred unit distribution amount			$ 19		$ 18	$ 18
Series B Preferred Units | Cash Distribution | Other current liabilities
Partners Capital and Distribution
Amount accrued to distributions payable									$ 10
Series B Preferred Units | Cash Distribution | Forecast
Partners Capital and Distribution
Preferred distributions per unit (usd per unit)	$ 24.88
Preferred unit distribution amount	$ 20

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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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