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Partners' Capital and Distributions - Distributions (Details) - USD ($) $ / shares in Units, $ in Millions					3 Months Ended		9 Months Ended
	Nov. 14, 2025	Aug. 14, 2025	May 15, 2025	Feb. 14, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Partners Capital and Distribution
Distributions					$ 431	$ 399	$ 1,304	$ 1,168
Cash Distribution | Common Units
Partners Capital and Distribution
Distributions		$ 267	$ 267	$ 267
Distribution per common unit (usd per unit)		$ 0.38	$ 0.38	$ 0.38
Cash Distribution | Common Units | Forecast
Partners Capital and Distribution
Distributions	$ 268
Distribution per common unit (usd per unit)	$ 0.38
Public | Cash Distribution | Common Units
Partners Capital and Distribution
Distributions		$ 179	$ 179	$ 179
Public | Cash Distribution | Common Units | Forecast
Partners Capital and Distribution
Distributions	$ 180
AAP | Cash Distribution | Common Units
Partners Capital and Distribution
Distributions		$ 88	$ 88	$ 88
AAP | Cash Distribution | Common Units | Forecast
Partners Capital and Distribution
Distributions	$ 88

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- Definition

Per unit of ownership amount of cash distributions paid to unit-holder of a limited partnership (LP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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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- Definition

Total distributions to each class of partners (i.e., general, limited and preferred partners).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-5

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-Section S99
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-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

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