CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME (LOSS)	[1],[2]	$ 77	$ (231)
ADJUSTMENTS TO RECONCILE NET INCOME (LOSS) TO CASH PROVIDED BY OPERATING ACTIVITIES:
Depreciation, depletion and amortization		1,099	930	[2],[3]
Deferred income tax benefit		(314)	(9)	[2]
Derivative losses, net		30	368	[2]
Cash payments on derivative settlements, net		15	(55)	[2]
Stock-based compensation		17	18	[2]
Gains on sales of assets		(20)	(37)	[2],[3]
Impairments		2	64	[2],[3]
Exploration		25	73	[2]
(Gains) losses on investments		18	(139)	[2]
Other		41	(93)	[2]
Changes in assets and liabilities		(137)	62	[2]
Net Cash Provided By Operating Activities		853	951	[2]
CASH FLOWS FROM INVESTING ACTIVITIES:
Drilling and completion costs		(1,070)	(928)	[2]
Business combination, net		(353)	0	[2]
Acquisitions of proved and unproved properties		(17)	(102)	[2]
Proceeds from divestitures of proved and unproved properties		82	384	[2]
Additions to other property and equipment		(18)	(5)	[2]
Proceeds from sales of other property and equipment		4	74	[2]
Proceeds from sales of investments		0	74	[2]
Net Cash Used In Investing Activities		(1,372)	(503)	[2]
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility borrowings		6,416	6,118	[2]
Payments on revolving credit facility borrowings		(5,452)	(6,393)	[2]
Cash paid to purchase debt		(381)	0	[2]
Extinguishment of other financing		0	(122)	[2]
Cash paid for preferred stock dividends		(46)	(46)	[2]
Distributions to noncontrolling interest owners		(2)	(3)	[2]
Other		(16)	(4)	[2]
Net Cash Provided By (Used In) Financing Activities		519	(450)	[2]
Net decrease in cash and cash equivalents		0	(2)	[2]
Cash and cash equivalents, beginning of period		4	5	[2]
Cash and cash equivalents, end of period		4	3	[2]
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid, net of capitalized interest		296	316	[2]
Income taxes paid, net of refunds received		(5)	(7)	[2]
SUPPLEMENTAL DISCLOSURE OF SIGNIFICANT NON-CASH INVESTING AND FINANCING ACTIVITIES:
Common stock issued for business combination		2,037	0	[2]
Change in senior notes exchanged		35	0	[2]
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		17	109	[2]
Change in divested proved and unproved properties
SUPPLEMENTAL DISCLOSURE OF SIGNIFICANT NON-CASH INVESTING AND FINANCING ACTIVITIES:
Change in non-cash investing and financing activities		$ (125)	$ 0	[2]

[1] Financial information for 2018 has been recast to reflect the retrospective application of the successful efforts method of accounting. See Note 1.

[2] Financial information for 2018 has been recast to reflect the retrospective application of the successful efforts method of accounting. See Note 1.

[3] Financial information for 2018 has been recast to reflect the retrospective application of the successful efforts method of accounting. See Note 1.