CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - USD ($) $ in Millions	Total	Plains Oryx Permian Basin LLC (Permian JV) Joint Venture Formation	Cactus II Pipeline LLC	Noncontrolling Interests	Noncontrolling Interests Plains Oryx Permian Basin LLC (Permian JV) Joint Venture Formation	Noncontrolling Interests Cactus II Pipeline LLC	Limited Partners Class A Shares Partners’ Capital	Limited Partners Class A Shares Partners’ Capital Plains Oryx Permian Basin LLC (Permian JV) Joint Venture Formation
Balance, beginning of period at Dec. 31, 2019	$ 14,485			$ 12,330			$ 2,155
Increase (Decrease) in Partners' Capital
Net income/(loss)	(2,440)			(1,872)			(568)
Distributions (Note 12)	(863)			(697)			(166)
Deferred tax asset (Note 15)	16						16
Other comprehensive income/(loss) (Note 12)	15			9			6
Equity-indexed compensation expense	20			14			6
Repurchase of common units by a subsidiary (Note 12)	(50)			(54)			4
Contributions from noncontrolling interests (Note 12)	12			12
Other	(5)			(16)			11
Balance, end of period at Dec. 31, 2020	11,190			9,726			1,464
Increase (Decrease) in Partners' Capital
Net income/(loss)	600			540			60
Distributions (Note 12)	(729)			(589)			(140)
Deferred tax asset (Note 15)	(42)						(42)
Other comprehensive income/(loss) (Note 12)	65			48			17
Equity-indexed compensation expense	20			14			6
Repurchase of common units by a subsidiary (Note 12)	(178)			(180)			2
Contributions from noncontrolling interests (Note 12)	1			1
Partners' capital impact of business combination (Note 7)		$ 3,256			$ 3,090			$ 166
Other	(6)			(6)
Balance, end of period at Dec. 31, 2021	14,177			12,644			1,533
Increase (Decrease) in Partners' Capital
Net income/(loss)	1,163			995			168
Distributions (Note 12)	(1,083)			(921)			(162)
Deferred tax asset (Note 15)	5						5
Other comprehensive income/(loss) (Note 12)	(101)			(73)			(28)
Equity-indexed compensation expense	33			23			10
Repurchase of common units by a subsidiary (Note 12)	(74)			(76)			2
Contributions from noncontrolling interests (Note 12)	26			26
Partners' capital impact of business combination (Note 7)		$ (26)	$ 526		$ (23)	$ 526		$ (3)
Other	(8)			(7)			(1)
Balance, end of period at Dec. 31, 2022	$ 14,638			$ 13,114			$ 1,524