CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities
Net loss	$ (943)	$ (1,003)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation, depletion and amortization	418	507
Gain on sale of assets	0	(3)
Impairment charges	458	1,103
Gain on extinguishment/modification of debt	(10)	(73)
Write-off of debt discount and deferred issue costs	90	0
Reorganization items, net	24	0
Other non-cash income items	23	30
Asset and liability changes
Accounts receivable	85	(56)
Owner and royalties payable	(72)	32
Accounts payable and accrued expenses	21	(24)
Derivative instruments	105	(109)
Accrued interest	86	8
Other asset changes	(37)	8
Other liability changes	(21)	2
Net cash provided by operating activities	227	422
Cash flows from investing activities
Cash paid for capital expenditures	(497)	(690)
Proceeds from the sale of assets	0	192
Cash paid for acquisitions	(21)	(292)
Net cash used in investing activities	(518)	(790)
Cash flows from financing activities
Proceeds from issuance of long-term debt	923	2,090
Repayments and repurchases of long-term debt	(765)	(1,654)
Proceeds from borrowing under DIP Facility	298	0
Repayment of borrowings from DIP Facility	(150)	0
DIP Facility costs	(6)	0
Fees/costs on debt exchange	0	(62)
Other debt issue costs	(2)	(22)
Other	(1)	(2)
Net cash provided by financing activities	297	350
Change in cash, cash equivalents and restricted cash	6	(18)
Cash, cash equivalents and restricted cash - beginning of period	27	45
Cash, cash equivalents and restricted cash - end of period	33	27
Supplemental cash flow information
Interest paid, net of amounts capitalized	226	337
Income tax refunds	$ 0	$ (9)