Consolidated Statement of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues and Other Income
Revenues	$ 1,126	$ 1,045	$ 934
Equity in earnings of affiliates	535	439	223
Other income	6	2	12
Total revenues and other income	1,667	1,486	1,169
Costs and Expenses
Operating and maintenance expenses	405	354	321
Depreciation	120	117	116
General and administrative expenses	67	64	69
Taxes other than income taxes	39	35	33
Interest and debt expense	108	115	101
Other expenses	2	1	1
Total costs and expenses	741	686	641
Income before income taxes	926	800	528
Income tax expense	3	4	4
Net income	923	796	524
Less: Net income attributable to Predecessors	0	0	63
Net income attributable to the Partnership	923	796	461
Less: Preferred unitholders’ interest in net income attributable to the Partnership	37	37	9
Less: General partner’s interest in net income attributable to the Partnership	140	240	160
Limited partners’ interest in net income attributable to the Partnership	746	519	292
Affiliated Entity
Revenues and Other Income
Revenues	$ 1,097	$ 1,012	$ 894
Common Units
Net Income Attributable to the Partnership Per Limited Partner Unit (dollars)
Common units—basic (in usd per share)	$ 4.45	$ 4.22	$ 2.60
Common units—diluted (in usd per share)	$ 4.29	$ 4.00	$ 2.59
Weighted-Average Limited Partner Units Outstanding (thousands)
Common units—basic (in shares)	167,655,306	122,768,582	112,044,824
Common units—diluted (in shares)	181,475,000	136,588,000	115,339,000
Service
Revenues and Other Income
Revenues	$ 196	$ 446
Third Party
Revenues and Other Income
Revenues	$ 29	$ 33	$ 40