CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Feb. 09, 2021	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ 5,383	$ 945		$ (9,750)	$ (308)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation, depletion and amortization	72	919		1,097	2,264
Deferred income tax benefit	(57)	(49)		(10)	(305)
Derivative (gains) losses, net	382	1,127		(596)	(3)
Cash receipts (payments) on derivative settlements, net	(17)	(1,142)		884	202
Share-based compensation	3	9		21	30
Gains on sales of assets	(5)	(12)		(30)	(43)
Impairments	0	1		8,535	11
Non-cash reorganization items, net	(6,680)	0		(213)	0
Exploration	2	2		417	49
Gains on purchases or exchanges of debt	0	0		(65)	(79)
Other	45	46		(41)	59
Changes in assets and liabilities	851	(37)		915	(254)
Net cash provided by (used in) operating activities	(21)	1,809		1,164	1,623
Cash flows from investing activities:
Capital expenditures	(66)	(669)		(1,142)	(2,263)
Business combination, net	0	(194)		0	(353)
Proceeds from divestitures of property and equipment	0	13		150	136
Net cash used in investing activities	(66)	(850)		(992)	(2,480)
Cash flows from financing activities:
Proceeds from Exit Credit Facility - Tranche A Loans	0	30		0	0
Payments on Exit Credit Facility - Tranche A Loans	(479)	(80)		0	0
Proceeds from pre-petition revolving credit facility borrowings	0	0		3,656	10,676
Payments on pre-petition revolving credit facility borrowings	0	0		(3,317)	(10,180)
Proceeds from DIP Facility borrowings	0	0		60	0
Payments on DIP Facility borrowings	(1,179)	0		(60)	0
Proceeds from issuance of senior notes, net	1,000	0		0	108
Proceeds from issuance of term loan, net	0	0		0	1,455
Proceeds from issuance of common stock	600	0		0	0
Proceeds from warrant exercise	0	2		0	0
Debt issuance and other financing costs	(8)	(3)		(109)	0
Cash paid to purchase debt	0	0		(94)	(1,073)
Cash paid for common stock dividends	0	(119)		0	0
Cash paid for preferred stock dividends	0	0		(22)	(91)
Other	0	(1)		(13)	(36)
Net cash provided by (used in) financing activities	(66)	(171)		101	859
Net increase (decrease) in cash, cash equivalents and restricted cash	(153)	788		273	2
Cash, cash equivalents and restricted cash, beginning of period	279	126	$ 279	6	4
Cash, cash equivalents and restricted cash, end of period	126	914	914	279	6
Cash and cash equivalents	40	905	905	279	6
Restricted cash	86	9	9	0	0
Total cash, cash equivalents and restricted cash	126	914	$ 914	279	6
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for reorganization items, net	66	65		140	0
Interest paid, net of capitalized interest	13	34		224	691
Income taxes paid, net of refunds received	0	(9)		0	(6)
SUPPLEMENTAL DISCLOSURE OF SIGNIFICANT NON-CASH INVESTING AND FINANCING ACTIVITIES:
Put option premium on equity backstop agreement	60	0		60	0
Operating lease obligations recognized	0	0		32	0
Common stock issued for business combination	0	1,232		0	2,037
Debt exchanged for common stock	0	0		0	693
Preferred stock exchanged for common stock	0	0		0	40
Change in senior notes exchanged	0	0		0	971
Change in accrued drilling and completion costs
SUPPLEMENTAL DISCLOSURE OF SIGNIFICANT NON-CASH INVESTING AND FINANCING ACTIVITIES:
Change in accrued drilling and completion costs	$ (5)	$ 30		$ (216)	$ (19)