CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue
Revenue from contract with customer	$ 500	$ 424	$ 447
Total revenue	556	481	503
Costs and expenses
Operations and maintenance – third parties	48	48	65
Operations and maintenance – related parties	124	114	59
Cost of product sold	29	24	36
Loss from impairment of fixed assets and revision of ARO	3	0	2
General and administrative – third parties	6	7	11
General and administrative – related parties	45	49	49
Depreciation, amortization and accretion	50	50	49
Property and other taxes	19	20	17
Total costs and expenses	324	312	288
Operating income	232	169	215
Income from equity method investments	352	417	373
Dividend income from other investments	0	0	14
Other income	39	40	36
Investment, dividend and other income	391	457	423
Interest income	30	23	4
Interest expense	85	93	96
Income before income taxes	568	556	546
Income tax expense	0	0	0
Net income	568	556	546
Less: Net income attributable to noncontrolling interests	12	13	18
Net income attributable to the Partnership	556	543	528
Components of Limited Partners' Interest In Net Income Attributable to the Partnership's Common Unitholders
Preferred unitholder’s interest in net income	48	36	0
General partner’s interest in net income attributable to the Partnership	0	55	147
Limited Partners’ interest in net income attributable to the Partnership’s common unitholders	$ 508	$ 452	$ 381
Net income per Limited Partner Unit - Basic and Diluted:
Distributions per Limited Partner unit (in dollars per share)	$ 1.36	$ 1.84	$ 1.75
Common
Net income per Limited Partner Unit - Basic and Diluted:
Common - basic (in dollars per share)	1.29	1.28	1.66
Common - diluted (in dollars per share)	$ 1.25	$ 1.25	$ 1.66
Common Unitholders Public
Weighted average Limited Partner Units outstanding - Basic and Diluted:
Common units - basic (in shares)	123.8	123.8	123.8
Common units - diluted (in shares)	123.8	123.8	123.8
Common Unitholder SPLC
Weighted average Limited Partner Units outstanding - Basic and Diluted:
Common units - basic (in shares)	269.5	229.7	105.4
Common units - diluted (in shares)	320.3	267.9	105.4
Third Parties | Transportation, Terminaling And Storage Services
Revenue
Revenue from contract with customer	$ 151	$ 123	$ 143
Third Parties | Product Revenue
Revenue
Revenue from contract with customer	1	0	5
Related Parties
Revenue
Lease revenue – related parties	56	57	56
Related Parties | Transportation, Terminaling And Storage Services
Revenue
Revenue from contract with customer	312	282	264
Related Parties | Product Revenue
Revenue
Revenue from contract with customer	$ 36	$ 19	$ 35