CONSOLIDATED STATEMENTS OF CHANGES IN (DEFICIT) EQUITY - USD ($) $ in Millions	Total	Common units - public	Common units - public Shell Pipeline Company L P	Subordinated Units Shell Pipeline Company L P	General Partner Shell Pipeline Company L P	Accumulated Other Comprehensive Loss	Noncontrolling Interests	Net Parent Investment
Beginning balance at Dec. 31, 2016	$ 534	$ 2,486	$ (124)	$ (390)	$ (1,874)	$ 0	$ 22	$ 414
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	392	119	112	0	65		19	77
Net proceeds from equity offerings	278	278			0
Contributions from general partner	6				6
Other contributions from Parent	17				17			0
Distributions to noncontrolling interests	(19)						(19)
Distributions to unitholders and general partner	(268)	(109)	(87)	(18)	(54)
Acquisitions from Parent	(1,455)				(1,035)			(420)
Net distributions to Parent	(66)							(66)
Proceeds from April 2017 divestiture	20				19		1
Expiration of subordinated period	0		(408)	408
Net assets not contributed to the partnership	(5)							(5)
Ending balance at Dec. 31, 2017	(566)	2,774	(507)	0	(2,856)	0	23	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	482	182	147		135		18
Net proceeds from equity offerings	973	673	300
Contributions from general partner	20				20
Other contributions from Parent	13				13		0
Distributions to noncontrolling interests	(16)						(16)
Distributions to unitholders and general partner	(423)	(169)	(139)		(115)
Acquisitions	(738)				(738)
Ending balance at Dec. 31, 2018	(257)	3,459	(198)	0	(3,543)	0	25	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	546	204	177		147		18
Other contributions from Parent	19				25	(6)
Distributions to noncontrolling interests	(17)						(17)
Other comprehensive loss	(2)					(2)
Distributions to unitholders and general partner	(519)	(209)	(177)		(133)		0
Acquisitions	(510)				(510)
Ending balance at Dec. 31, 2019	$ (749)	$ 3,450	$ (203)	$ 0	$ (4,014)	$ (8)	$ 26	$ 0