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Partners' Capital and Distributions - Preferred Unit Distributions (Details) - USD ($) $ / shares in Units, $ in Millions	Aug. 15, 2023	Aug. 14, 2023	May 15, 2023	Feb. 15, 2023	Feb. 14, 2023	Jan. 31, 2023	Jun. 30, 2023
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)			$ 0.585		$ 0.525
Preferred unit distribution amount			$ 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 | Cash Distribution
Partners Capital and Distribution
Preferred distributions per unit (usd per unit)			$ 22.18	$ 22.27
Preferred unit distribution amount			$ 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)	$ 24.10
Preferred unit distribution amount	$ 19

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The percentage points to be added to the applicable rate of the ten-year U.S. Treasury to calculate the new distribution rate on the preferred units if the holders elect to reset the distribution rate.

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The quarterly distributions per unit to which holders of the preferred units are entitled.

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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).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
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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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-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1

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-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-SubTopic 405
-Topic 942
-Publisher FASB
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Aggregate dividends paid during the period for each share of preferred stock outstanding.

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