Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 18	$ 1
Accounts receivable:
Trade, net of allowance for doubtful accounts of $3 and $3 million, respectively	485	726
Affiliates	98	138
Other	14	14
Inventories	26	46
Unrealized gains on derivative instruments	252	32
Collateral cash deposits	35	111
Other	30	12
Total current assets	958	1,080
Property, plant and equipment, net	8,180	8,811
Goodwill	0	159
Intangible assets, net	48	61
Investments in unconsolidated affiliates	3,681	3,724
Unrealized gains on derivative instruments	53	2
Operating lease assets	98	107
Other long-term assets	170	183
Total assets	13,188	14,127
Accounts payable:
Affiliates	97	100
Other	26	35
Current debt	3	603
Unrealized losses on derivative instruments	192	58
Accrued interest	67	80
Accrued taxes	69	65
Accrued wages and benefits	25	58
Capital spending accrual	10	28
Other	148	128
Total current liabilities	966	1,793
Long-term debt	5,921	5,321
Unrealized losses on derivative instruments	46	20
Deferred income taxes	30	30
Operating lease liabilities	83	88
Other long-term liabilities	226	242
Total liabilities	7,272	7,494
Equity:
Limited partners (208,329,928 and 143,317,328 common units authorized, issued and outstanding, respectively)	5,135	5,861
Accumulated other comprehensive loss	(7)	(7)
Total partners’ equity	5,888	6,605
Noncontrolling interests	28	28
Total equity	5,916	6,633
Total liabilities and equity	13,188	14,127
Allowance for Doubtful Accounts Receivable, Current	$ 2	3
Common unitholders, units outstanding (in shares)	208,329,928
Common unitholders, units issued (in shares)	208,329,928
Accounts Payable, Trade, Current	$ 329	638
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	41	1
Series A Preferred Limited Partners [Member]
Equity:
Preferred Units, Preferred Partners' Capital Accounts	498	489
Total equity	$ 498	$ 489
Preferred Units, Issued	500,000	500,000
Preferred Units, Outstanding	500,000	500,000
Series B Preferred Limited Partners [Member]
Equity:
Preferred Units, Preferred Partners' Capital Accounts	$ 156	$ 156
Total equity	$ 156	$ 156
Preferred Units, Issued	6,450,000	6,450,000
Preferred Units, Outstanding	6,450,000	6,450,000
Series C Preferred Limited Partners [Member]
Equity:
Preferred Units, Preferred Partners' Capital Accounts	$ 106	$ 106
Total equity	$ 106	$ 106
Preferred Units, Issued	4,400,000	4,400,000
Preferred Units, Outstanding	4,400,000	4,400,000