Condensed Statements of Consolidated Operations (unaudited) Statement - USD ($) shares in Millions, $ in Millions		3 Months Ended					6 Months Ended
		Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018		Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues:
Revenues		$ 601		$ 569	[1],[2]		$ 1,231	$ 1,115	[1],[2]
Costs and Expenses:
NGL expense (excluding items shown separately below)		33		45	[2]		92	93	[2]
Operating expenses (excluding depreciation and amortization)		237		221	[2]		476	422	[2]
Depreciation and amortization expenses		104		93	[2]		205	182	[2],[3]
General and administrative expenses		18		29	[2]		38	60	[2]
Loss on asset disposals and impairments		2		1	[2]		2	1	[2],[3]
Operating Income		207		180	[1],[2]		418	357	[1],[2]
Interest and financing costs, net		(63)		(60)	[1],[2]		(124)	(115)	[1],[2]
Equity in earnings of equity method investments		9		10	[1],[2]		16	18	[1],[2]
Other income, net		7		2	[1],[2]		7	3	[1],[2]
Net Earnings		160		132	[1],[2],[4]		317	263	[1],[2],[3],[4]
Loss attributable to Predecessors		0		16	[2]	$ 8	0	24	[2]
Net Earnings Attributable to Partners		160	$ 157	148		$ 139	317	287
Preferred unitholders’ interest in net earnings		(10)		(10)			(20)	(24)
Limited Partners’ Interest in Net Earnings		$ 150		$ 138			$ 297	$ 263
Net earnings per limited partner unit:
Common - basic	[5]	$ 0.65		$ 0.63			$ 1.29	$ 1.23
Common - diluted	[5]	$ 0.65		$ 0.63			$ 1.29	$ 1.23
Weighted average limited partner units outstanding:
Common units - basic		245.6		217.2			245.6	217.2
Common units - diluted	[6]	245.7		217.3			245.7	217.3
Affiliated Entity
Revenues:
Revenues	[7]	$ 424		$ 389	[2],[8]		$ 868	$ 716	[2],[8]
Third Party
Revenues:
Revenues		$ 177		$ 180	[2]		$ 363	$ 399	[2]

[1] Adjusted to include the historical results of the Predecessors. See Note 1 for further discussion.

[2] Adjusted to include the historical results of the Predecessors. See Note 1 for further discussion.

[3] Adjusted to include the historical results of the Predecessors. See Note 1 for further discussion.

[4] Adjusted to include the historical results of the Predecessors. See Note 1 for further discussion.

[5] Amounts may not recalculate due to rounding of dollar and unit information.

[6] Diluted net earnings per unit include the effects of potentially dilutive units on our common units, which consist of unvested phantom units.

[7] Represents 71% and 68% of our total revenues for the three months ended June 30, 2019 and 2018, respectively, and 71% and 64% of our total revenues for the six months ended June 30, 2019 and 2018, respectively.

[8] Adjusted to include the historical results of the Predecessors. See Note 1 for further discussion.