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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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Change in the different classes of partners' capital accounts during the year due to acquisitions. Partners include general, limited and preferred partners.

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Partners' Capital and Distributions - Noncontrolling Interests in Subsidiaries (Details) - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	Nov. 30, 2022	Oct. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2023
Plains Oryx Permian Basin LLC \| Joint Venture Transaction
Partners Capital and Distribution [Line Items]
Partners’ capital, excluding noncontrolling interests			$ (26)	$ 3,256
Plains Oryx Permian Basin LLC \| Noncontrolling Interests \| Joint Venture Transaction
Partners Capital and Distribution [Line Items]
Partners’ capital, excluding noncontrolling interests			(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, excluding noncontrolling interests		595	(10)	$ 605
Cactus II Pipeline LLC
Partners Capital and Distribution [Line Items]
Additional interest acquired (as a percent)	5.00%
Business combination, step acquisition, equity interest in acquiree, including subsequent acquisition (as a percent)	70.00%
Partners’ capital, excluding noncontrolling interests			526
Cactus II Pipeline LLC \| Noncontrolling Interests
Partners Capital and Distribution [Line Items]
Noncontrolling interest, increase from business combination	$ 526
Partners’ capital, excluding noncontrolling interests			$ 526
Oryx Midstream Holdings LLC \| Plains Oryx Permian Basin LLC \| Joint Venture Transaction
Partners Capital and Distribution [Line Items]
Partners’ capital, excluding noncontrolling interests		$ 3,230
Plains Oryx Permian Basin LLC
Partners Capital and Distribution [Line Items]
Noncontrolling interest, ownership (as a percent)					35.00%
Plains Oryx Permian Basin LLC \| Oryx Midstream Holdings LLC \| Joint Venture Transaction
Partners Capital and Distribution [Line Items]
Noncontrolling interest, ownership (as a percent)		35.00%
Noncontrolling interest, ownership (as a parent)		65.00%
Cactus II Pipeline LLC
Partners Capital and Distribution [Line Items]
Noncontrolling interest, ownership (as a percent)					30.00%
Cactus II Pipeline LLC \| Enbridge
Partners Capital and Distribution [Line Items]
Noncontrolling interest, ownership (as a percent)	30.00%
Red River Pipeline Company LLC
Partners Capital and Distribution [Line Items]
Noncontrolling interest, ownership (as a percent)					33.00%