CONSOLIDATED STATEMENTS OF CHANGES IN (DEFICIT) EQUITY - USD ($) $ in Millions	Total	Preferred Partner	Common Unitholders Public	Common Unitholder SPLC	General Partner SPLC	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjustment Common Unitholders Public	Cumulative Effect, Period of Adoption, Adjustment Common Unitholder SPLC	Financing Receivables	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Beginning balance at Dec. 31, 2018	$ (257)	$ 0	$ 3,459	$ (198)	$ (3,543)	$ (9)	$ (4)	$ (5)	$ 0	$ 0	$ 25
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	546		204	177	147						18
Other contributions from Parent	19				25					(6)
Other comprehensive income (loss)	(2)									(2)
Distributions to unitholders and general partner	(519)		(209)	(177)	(133)
Distributions to noncontrolling interests	(17)										(17)
Acquisitions	(510)				(510)
Ending balance at Dec. 31, 2019	(749)	0	3,450	(203)	(4,014)				0	(8)	26
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	556	36	160	292	55						13
Other contributions from Parent	2			2
Other comprehensive income (loss)	(1)									(1)
Distributions to unitholders and general partner	(670)	(24)	(228)	(308)	(110)
Distributions to noncontrolling interests	(16)										(16)
Principal repayments on financing receivables	3								3
Acquisitions	417	(1,071)		(2,280)	4,069				(301)
Ending balance at Dec. 31, 2020	(458)	(1,059)	3,382	(2,497)	0				(298)	(9)	23
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	568	48	160	348							12
Other comprehensive income (loss)	1									1
Distributions to unitholders and general partner	(606)	(48)	(188)	(370)
Distributions to noncontrolling interests	(12)										(12)
Principal repayments on financing receivables	5								5
Acquisitions	9			31							(22)
Ending balance at Dec. 31, 2021	$ (493)	$ (1,059)	$ 3,354	$ (2,488)	$ 0				$ (293)	$ (8)	$ 1