Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income	$ 129	$ 230
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion	142	137
Amortization of deferred financing fees	5	5
Loss (gain) on disposal of assets and impairment charges	7	46
Other non-cash, net	0	(3)
Non-cash unit-based compensation expense	11	10
Deferred income tax	3	10
Inventory valuation adjustment	126	(71)
Equity in earnings of unconsolidated affiliate	(3)	0
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	147	(70)
Receivables from affiliates	6	33
Inventories	(34)	15
Other assets	22	(33)
Accounts payable	(150)	68
Accounts payable to affiliates	62	(22)
Accrued expenses and other current liabilities	6	(68)
Other noncurrent liabilities	(11)	27
Net cash provided by operating activities	462	294
Cash flows from investing activities:
Capital expenditures	(80)	(103)
Contributions to unconsolidated affiliate	(8)	(37)
Distributions from unconsolidated affiliate in excess of cumulative earnings	9	0
Cash Acquired from Acquisition	0	(5)
Proceeds from disposal of property and equipment	6	29
Net cash used in investing activities	(73)	(116)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	0	600
Payments on long-term debt	(8)	(6)
Revolver borrowings	952	1,797
Revolver repayments	(1,027)	(2,343)
Loan origination costs	0	(6)
Advances from (to) affiliates	0	1
Distributions to unitholders	(264)	(262)
Net cash used in financing activities	(347)	(221)
Net increase (decrease) in cash and cash equivalents	42	(43)
Cash and cash equivalents at beginning of period	21	56
Cash and cash equivalents at end of period	63	13
Supplemental disclosure of non-cash investing activities:
Change in note payable to affiliate	$ 8	$ 75