CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash Flows From Operating Activities:
Net income	$ 781	$ 230	[1]
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	352	426
Amortization of debt issuance costs	5	6
Impairments	8	171
Deferred income taxes	(400)	0
(Gain) loss on derivatives, unsettled	(108)	113
Stock-based compensation	6	12
(Gain) loss on early extinguishment of debt	(7)	8
Loss on sale of assets	3	0
Other	11	7
Change in assets and liabilities:
Accounts receivable	257	(7)
Accounts payable	(124)	60
Taxes payable	(3)	0
Interest payable	2	(5)
Inventories	(2)	(9)
Other assets and liabilities	(42)	(41)
Net cash provided by operating activities	739	971
Cash Flows From Investing Activities:
Capital investments	(877)	(1,008)
Proceeds from sale of property and equipment	42	9
Other	0	4
Net cash used in investing activities	(835)	(995)
Cash Flows From Financing Activities:
Payments on long-term debt	(43)	(1,191)
Payments on revolving credit facility	0	(1,122)
Borrowings under revolving credit facility	0	1,482
Change in bank drafts outstanding	(11)	10
Debt issuance costs	0	(9)
Purchase of treasury stock	(21)	(25)
Preferred stock dividend	0	(27)
Cash paid for tax withholding	(1)	(1)
Net cash used in financing activities	(76)	(883)
Decrease in cash and cash equivalents	(172)	(907)
Cash and cash equivalents at beginning of year	201	916
Cash and cash equivalents at end of period	$ 29	$ 9

[1] In 2018, deferred tax activity incurred in other comprehensive income was offset by a valuation allowance.