Partners' Capital and Distributions - Distributions to Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Partners Capital and Distribution [Line Items]
Distributions paid		$ 1,569	$ 1,330	$ 1,083
Noncontrolling Interests
Partners Capital and Distribution [Line Items]
Distributions paid		1,318	1,121	921
Cash Distribution | Noncontrolling Interests | Consolidated Joint Venture Entities
Partners Capital and Distribution [Line Items]
Distributions paid		425	333	298
Cash Distribution | Noncontrolling Interests | Plains Oryx Permian Basin LLC
Partners Capital and Distribution [Line Items]
Distributions paid	$ 54	322	249	273
Cash Distribution | Noncontrolling Interests | Cactus II
Partners Capital and Distribution [Line Items]
Distributions paid		77	63	4
Cash Distribution | Noncontrolling Interests | Red River
Partners Capital and Distribution [Line Items]
Distributions paid		$ 26	$ 21	$ 21