Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating revenues:
Trading and marketing gains (losses), net	$ (7)	$ 29	$ 145	$ 2
Total operating revenues	1,274	1,798	2,931	3,997
Operating costs and expenses:
Operating and maintenance expense	148	182	301	360
Depreciation and amortization expense	93	101	192	204
General and administrative expense	51	68	107	135
Other expense, net	(5)	(1)	(8)	(6)
Asset Impairment	0	0	746	0
Loss on sale of assets, net	0	5	0	14
Restructuring costs	9	9	9	9
Total operating costs and expenses	1,280	1,722	3,483	3,888
Operating (loss) income	(6)	76	(552)	109
Earnings from unconsolidated affiliates	125	117	201	230
Interest expense, net	(71)	(73)	(149)	(142)
(Loss) income before income taxes	48	120	(500)	197
Income tax expense	0	0	1	1
Net income	48	120	(501)	196
Net income attributable to noncontrolling interests	(1)	(1)	(2)	(2)
Net income attributable to partners	47	119	(503)	194
Series A preferred limited partners' interest in net income	(10)	(10)	(19)	(19)
Series B preferred limited partners' interest in net income	(3)	(3)	(6)	(6)
Series C preferred limited partners' interest in net income	(2)	(2)	(4)	(4)
General partner’s interest in net income	0	(42)	0	(83)
Net income allocable to limited partners	$ 32	$ 62	(532)	$ 82
Property, plant, and equipment impairment			$ 587
Net Income (Loss), Net of Tax, Per Outstanding Limited Partnership Unit, Diluted	$ 0.15	$ 0.43	$ (2.55)	$ 0.57
Net Income (Loss), Per Outstanding Limited Partnership and General Partnership Unit, Basic, Net of Tax	$ 0.15	$ 0.43	$ (2.55)	$ 0.57
Weighted Average Limited Partnership and General Partnership Units Outstanding, Basic	208,300	143,300	208,300	143,300
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	$ 1,003	$ 1,365	$ 2,174	$ 3,136
Operating costs and expenses:
Purchases and related costs	723	1,084	1,595	2,617
Transportation, Processing and Other [Member]
Operating revenues:
Sales of natural gas, NGLs and condensate	109	110	221	225
Affiliated Entity | Natural Gas, NGLs and Condensate [Member]
Operating revenues:
Sales of natural gas, NGLs and condensate	169	294	391	634
Operating costs and expenses:
Purchases and related costs	21	68	57	130
Affiliated Entity | Transportation Fees
Operating costs and expenses:
Purchases and related costs	$ 230	$ 204	$ 468	$ 413