Acquisitions, Divestitures and Other Transactions - Partners' Capital (Details) - Plains Oryx Permian Basin LLC (Permian JV) - Joint Venture Formation - USD ($) $ in Millions	12 Months Ended		15 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022
Business Acquisition [Line Items]
Partners' capital impact of business combination	$ (26)	$ 3,256	$ 3,230
Class A Shares
Business Acquisition [Line Items]
Partners' capital impact of business combination			163
Noncontrolling Interests
Business Acquisition [Line Items]
Noncontrolling interest, increase from business combination			3,067
Partners' capital impact of business combination	$ (23)	$ 3,090
Noncontrolling Interests | Oryx Midstream Holdings LLC
Business Acquisition [Line Items]
Noncontrolling interest, increase from business combination			2,635
Noncontrolling Interests | PAA and AAP
Business Acquisition [Line Items]
Noncontrolling interest, increase from business combination			$ 432