CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
NET LOSS	$ (8,313)		$ (21)
ADJUSTMENTS TO RECONCILE NET LOSS TO CASH PROVIDED BY OPERATING ACTIVITIES:
Depreciation, depletion and amortization	603		519
Deferred income tax benefit	(10)	$ 10	(314)
Derivative (gains) losses, net	(907)		304
Cash receipts on derivative settlements, net	89		14
Stock-based compensation	5		6
Gains on sales of assets	0		(19)
Impairments	8,522		1
Exploration	279		18
Losses on investments	23		1
Gains on purchases or exchanges of debt	(63)		0
Other	8		40
Changes in assets and liabilities	161		(93)
Net Cash Provided By Operating Activities	397		456
CASH FLOWS FROM INVESTING ACTIVITIES:
Drilling and completion costs	(501)		(515)
Business combination, net	0		(353)
Acquisitions of proved and unproved properties	(6)		(6)
Proceeds from divestitures of proved and unproved properties	7		26
Additions to other property and equipment	(11)		(9)
Proceeds from sales of other property and equipment	0		1
Net Cash Used In Investing Activities	(511)		(856)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility borrowings	2,331		3,572
Payments on revolving credit facility borrowings	(2,021)		(3,136)
Cash paid to purchase debt	(93)		(1)
Cash paid for preferred stock dividends	(22)		(23)
Other	(5)		(8)
Net Cash Provided By Financing Activities	190		404
Net increase in cash and cash equivalents	76		4
Cash and cash equivalents, beginning of period	6		4
Cash and cash equivalents, end of period	82	$ 6	8
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid, net of capitalized interest	113		145
Income taxes paid, net of refunds received	0		(5)
SUPPLEMENTAL DISCLOSURE OF SIGNIFICANT NON-CASH INVESTING AND FINANCING ACTIVITIES:
Common stock issued for business combination	0		2,037
Change in accrued drilling and completion costs
SUPPLEMENTAL DISCLOSURE OF SIGNIFICANT NON-CASH INVESTING AND FINANCING ACTIVITIES:
Change in non-cash investing and financing activities	$ (29)		$ 39