Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash Flows from Operating Activities:
Net income	$ 149	$ 247
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	209	215
Deferred income taxes	1	(1)
Impairments	28	0
Net loss on sale/retirement of assets	17	2
Gain on extinguishment of debt	(5)	0
Equity in earnings of equity method affiliate	(11)	(7)
Return on investment in equity method affiliate	11	7
Equity-based compensation	7	9
Amortization of debt costs and discount	1	0
Changes in other assets and liabilities:
Accounts receivable, net	20	58
Accounts receivable—affiliated companies	10	(1)
Inventory	3	4
Gas imbalance assets	(3)	3
Other current assets	(10)	(3)
Other assets	3	6
Accounts payable	(71)	(111)
Accounts payable—affiliated companies	1	(1)
Gas imbalance liabilities	0	(4)
Other current liabilities	(45)	15
Other liabilities	(4)	(11)
Net cash provided by operating activities	311	427
Cash Flows from Investing Activities:
Capital expenditures	(102)	(252)
Proceeds from sale of assets	19	0
Return of investment in equity method affiliate	8	9
Other, net	2	(9)
Net cash used in investing activities	(73)	(252)
Cash Flows from Financing Activities:
(Decrease) increase in short-term debt	(125)	32
Proceeds from long-term debt, net of issuance costs	0	850
Repayment of long-term debt	(267)	(500)
Proceeds from Revolving Credit Facility	869	0
Repayment of Revolving Credit Facility	(469)	(250)
Distributions to common unitholders	(216)	(276)
Distributions to preferred unitholders	(18)	(18)
Distributions to non-controlling interests	(3)	(2)
Cash paid for employee equity-based compensation	(2)	(23)
Net cash used in financing activities	(231)	(187)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	7	(12)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	4	22
Cash, Cash Equivalents and Restricted Cash at End of Period	$ 11	$ 10