Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Revenues	[1]	$ 2,380		$ 3,249		$ 1,669
Costs and Expenses
Operating expenses	[1]	885	[2]	691	[2]	560
General and Administrative Expense	[1]	121		158		106
Depreciation and amortization expenses	[3]	368		313		233	[4]
(Gain) loss on asset disposals and impairments	[1]	4		(25)		4	[3]
Operating Income	[1]	796		603		448
Interest and financing costs, net	[1]	(233)		(330)		(195)
Equity in earnings of equity method investments	[1]	31		22		13
Other Income, net	[1]	6		11		11
Net Earnings	[1],[4],[5]	600		306		277	[3]
Loss attributable to Predecessors		(28)		(43)		(62)
Net Earnings Attributable to Partners		628		349		339
Preferred unitholders’ interest in net earnings		(44)		(3)		0
Net Income (Loss) Allocated to General Partners		0		(79)		(152)
Limited partners’ interest in net earnings		$ 584		$ 267		$ 187
Net earnings per limited partner unit:
Common - basic (dollars per unit)	[6]	$ 2.57		$ 2.11		$ 1.87
Common - diluted (dollars per unit)	[6]	$ 2.57		$ 2.11		$ 1.87
Weighted average limited partner units outstanding:
Common units - basic (units)		228.7		126.0		98.2
Common units - diluted (units)	[7]	228.9		126.1		98.2
Cash distributions paid per unit		$ 4.0750		$ 3.8062		$ 3.3070
Oil and Gas, Purchased [Member]
Costs and Expenses
Cost of Goods and Services Sold	[1],[8]	$ 0		$ 1,244	[9],[10]	$ 316
Natural Gas, Midstream [Member]
Costs and Expenses
Cost of Goods and Services Sold	[1]	206		265	[10]	2
Affiliated Entity [Member]
Revenues		1,589		1,431		847
Affiliated Entity [Member] | Fee-Based Sales [Member]
Revenues	[1]	1,309		942		747
Affiliated Entity [Member] | Product-Based Sales [Member]
Revenues	[1],[8]	280		489		100
Third Party [Member] | Fee-Based Sales [Member]
Revenues	[1]	591		656		819
Third Party [Member] | Product-Based Sales [Member]
Revenues	[1],[8]	$ 200		$ 1,162		$ 3

[1] All periods include the historical results of the Predecessors. See Notes 1 and 2 for further discussion.

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

[3] All periods include the historical results of the Predecessors. See Notes 1 and 2 for further discussion.

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

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

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

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

[8] Due to the adoption of ASC 606 effective January 1, 2018, the revenues and costs associated with our fuel purchase and supply arrangements for year ended December 31, 2018 were netted. See Note 1 for further discussion.

[9] Due to the adoption of ASC 606 effective January 1, 2018, the revenues and costs associated with our fuel purchase and supply arrangements for the year ended December 31, 2018 were netted. See Note 1 for further discussion.

[10] Excludes direct operating expenses incurred across our operating segments and depreciation and amortization expenses.