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Partners' Capital and Distributions - Noncontrolling Interests in Subsidiaries (Details) - USD ($) $ in Millions	1 Months Ended		12 Months Ended		15 Months Ended
	Nov. 30, 2022	Oct. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022
Partners Capital and Distribution [Line Items]
Noncontrolling interests			$ 3,268	$ 2,838	$ 3,268
Cactus II Pipeline LLC
Partners Capital and Distribution [Line Items]
Additional interest acquired	5.00%
Partners' capital impact of business combination			526
Business Combination, Step Acquisition, Equity Interest in Acquiree, Including Subsequent Acquisition, Percentage	70.00%
Cactus II Pipeline LLC | Noncontrolling Interests
Partners Capital and Distribution [Line Items]
Partners' capital impact of business combination			526
Noncontrolling interest, increase from business combination	$ 526
Plains Oryx Permian Basin LLC | Joint Venture Transaction
Partners Capital and Distribution [Line Items]
Partners' capital impact of business combination			(26)	3,256
Plains Oryx Permian Basin LLC | Noncontrolling Interests | Joint Venture Transaction
Partners Capital and Distribution [Line Items]
Partners' capital impact of business combination			(16)	2,651
Plains Oryx Permian Basin LLC | Noncontrolling Interests | Joint Venture Transaction | Oryx Midstream Holdings LLC
Partners Capital and Distribution [Line Items]
Noncontrolling interest, increase from business combination					2,635
Plains Oryx Permian Basin LLC | Partners’ Capital Excluding Noncontrolling Interests | Joint Venture Transaction
Partners Capital and Distribution [Line Items]
Partners' capital impact of business combination			$ (10)	$ 605	595
Oryx Midstream Holdings LLC | Plains Oryx Permian Basin LLC | Joint Venture Transaction
Partners Capital and Distribution [Line Items]
Partners' capital impact of business combination					$ 3,230
Plains Oryx Permian Basin LLC
Partners Capital and Distribution [Line Items]
Noncontrolling interest, ownership percentage			35.00%		35.00%
Plains Oryx Permian Basin LLC | Joint Venture Transaction
Partners Capital and Distribution [Line Items]
Consolidated subsidiary, ownership interest held by the parent		65.00%
Plains Oryx Permian Basin LLC | Oryx Midstream Holdings LLC | Joint Venture Transaction
Partners Capital and Distribution [Line Items]
Noncontrolling interest, ownership percentage by parent		35.00%
Consolidated subsidiary, ownership interest held by the parent		65.00%
Cactus II Pipeline LLC
Partners Capital and Distribution [Line Items]
Noncontrolling interest, ownership percentage			30.00%		30.00%
Cactus II Pipeline LLC | Enbridge
Partners Capital and Distribution [Line Items]
Noncontrolling interest, ownership percentage	30.00%
Red River Pipeline Company LLC
Partners Capital and Distribution [Line Items]
Noncontrolling interest, ownership percentage			33.00%		33.00%

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