Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating revenues:
Trading and marketing gains (losses), net	$ 11	$ (1)	$ 156	$ 1
Total operating revenues	1,586	1,699	4,517	5,696
Operating costs and expenses:
Operating and maintenance expense	146	187	447	547
Depreciation and amortization expense	92	100	284	304
General and administrative expense	66	66	173	201
Other expense, net	(4)	0	(12)	(6)
Asset Impairment	0	247	746	247
Loss on sale of assets, net	0	0	0	14
Restructuring costs	0	2	9	11
Total operating costs and expenses	1,526	1,910	5,009	5,798
Operating (loss) income	60	(211)	(492)	(102)
Earnings from unconsolidated affiliates	130	114	331	344
Interest expense, net	(77)	(79)	(226)	(221)
(Loss) income before income taxes	113	(176)	(387)	21
Income tax expense	1	1	2	2
Net income	112	(177)	(389)	19
Net income attributable to noncontrolling interests	(1)	(1)	(3)	(3)
Net income attributable to partners	111	(178)	(392)	16
Series A preferred limited partners' interest in net income	(9)	(9)	(28)	(28)
Series B preferred limited partners' interest in net income	(3)	(3)	(9)	(9)
Series C preferred limited partners' interest in net income	(3)	(3)	(7)	(7)
General partner’s interest in net income	0	(35)	0	(118)
Net income allocable to limited partners	$ 96	$ (228)	$ (436)	$ (146)
Net income per limited partner unit — basic and diluted	$ 0.46	$ (1.59)	$ (2.09)	$ (1.02)
Weighted Average Limited Partnership Units Outstanding, Basic	208,300	143,300	208,300	143,300
Net Income (Loss), Net of Tax, Per Outstanding Limited Partnership Unit, Diluted	$ 0.46	$ (1.59)	$ (2.09)	$ (1.02)
Weighted Average Limited Partnership Units Outstanding, Diluted	208,700	143,300	208,300	143,300
Natural Gas, NGLs and Condensate [Member] | Third Party
Operating revenues:
Sales of natural gas, NGLs and condensate	$ 1,204	$ 1,353	$ 3,378	$ 4,489
Operating costs and expenses:
Purchases and related costs	944	1,041	2,539	3,658
Transportation, Processing and Other [Member]
Operating revenues:
Sales of natural gas, NGLs and condensate	109	101	330	326
Affiliated Entity | Natural Gas, NGLs and Condensate [Member]
Operating revenues:
Sales of natural gas, NGLs and condensate	262	246	653	880
Operating costs and expenses:
Purchases and related costs	32	47	89	177
Affiliated Entity | Transportation Fees
Operating costs and expenses:
Purchases and related costs	$ 242	$ 220	$ 710	$ 633