Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating revenues:
Trading and marketing gains (losses), net	$ 152	$ (27)
Total operating revenues	1,657	2,199
Operating costs and expenses:
Operating and maintenance expense	153	178
Depreciation and amortization expense	99	103
General and administrative expense	56	67
Other expense, net	(3)	(5)
Asset Impairment	746	0
Loss on sale of assets, net	0	9
Total operating costs and expenses	2,203	2,166
Operating (loss) income	(546)	33
Earnings from unconsolidated affiliates	76	113
Interest expense, net	(78)	(69)
(Loss) income before income taxes	(548)	77
Income tax expense	1	1
Net income	(549)	76
Net income attributable to noncontrolling interests	(1)	(1)
Net income attributable to partners	(550)	75
Series A preferred limited partners' interest in net income	(9)	(9)
Series B preferred limited partners' interest in net income	(3)	(3)
Series C preferred limited partners' interest in net income	(2)	(2)
General partner’s interest in net income	0	(41)
Net income allocable to limited partners	$ (564)	$ 20
Net income per limited partner unit — basic and diluted	$ (2.71)	$ 0.14
Weighted Average Number of Limited Partnership and General Partnership Unit Outstanding, Basic and Diluted	208.3	143.3
Property, plant, and equipment impairment	$ 587
Natural Gas, NGLs and Condensate [Member] | Third Party
Operating revenues:
Sales of natural gas, NGLs and condensate	1,171	$ 1,771
Operating costs and expenses:
Purchases and related costs	872	1,533
Transportation, Processing and Other [Member]
Operating revenues:
Sales of natural gas, NGLs and condensate	112	115
Affiliated Entity | Natural Gas, NGLs and Condensate [Member]
Operating revenues:
Sales of natural gas, NGLs and condensate	222	340
Operating costs and expenses:
Purchases and related costs	36	62
Affiliated Entity | Transportation Fees
Operating costs and expenses:
Purchases and related costs	$ 238	$ 209