CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue
Revenue from contract with customer	$ 424	$ 447	$ 469
Revenues, Total	481	503	525
Costs and expenses
Operations and maintenance – third parties	48	65	108
Operations and maintenance – related parties	114	59	54
Cost of product sold	24	36	32
Loss (gain) from revision of asset retirement obligation	0	2	(3)
General and administrative – third parties	7	11	8
General and administrative – related parties	49	49	52
Depreciation, amortization and accretion	50	49	46
Property and other taxes	20	17	16
Total costs and expenses	312	288	313
Operating income	169	215	212
Income from equity method investments	417	373	235
Dividend income from other investments	0	14	67
Other income	40	36	31
Investment, dividend and other income	457	423	333
Interest income	23	4	2
Interest expense	93	96	64
Income before income taxes	556	546	483
Income tax expense	0	0	1
Net income	556	546	482
Less: Net income attributable to noncontrolling interests	13	18	18
Net income attributable to the Partnership	543	528	464
Preferred unitholder’s interest in net income	36	0	0
General partner’s interest in net income attributable to the Partnership	55	147	134
Limited Partners’ interest in net income attributable to the Partnership’s common unitholders	$ 452	$ 381	$ 330
Net income per Limited Partner Unit - Basic and Diluted:
Distributions per Limited Partner unit (in dollars per share)	$ 1.8400	$ 1.7500	$ 1.4950
Common
Costs and expenses
Net income attributable to the Partnership		$ 381	$ 330
Net income per Limited Partner Unit - Basic and Diluted:
Common - Basic (in dollars per share)	1.28	$ 1.66	$ 1.50
Common - Diluted (in dollars per share)	$ 1.25	$ 1.66	$ 1.50
Weighted average Limited Partner Units outstanding - Basic and Diluted:
Common units - basic (in shares)	38.2	229.2	220.3
Common units – public
Costs and expenses
Net income	$ 160	$ 204	$ 182
Weighted average Limited Partner Units outstanding - Basic and Diluted:
Common units - basic (in shares)	123.8	123.8	121.3
Common units - diluted (in shares)	123.8	123.8	121.3
Common units – public | Shell Pipeline Company L P
Costs and expenses
Net income	$ 292	$ 177	$ 147
Common units - SPLC | Shell Pipeline Company L P
Weighted average Limited Partner Units outstanding - Basic and Diluted:
Common units - basic (in shares)	229.7	105.4	99.0
Common units - diluted (in shares)	267.9	105.4	99.0
Third Parties | Transportation, Terminaling And Storage Services
Revenue
Revenue from contract with customer	$ 123	$ 143	$ 209
Third Parties | Product Revenue
Revenue
Revenue from contract with customer	0	5	2
Related Parties
Revenue
Lease revenue – related parties	57	56	56
Related Parties | Transportation, Terminaling And Storage Services
Revenue
Revenue from contract with customer	282	264	229
Related Parties | Product Revenue
Revenue
Revenue from contract with customer	$ 19	$ 35	$ 29