Revenue (Tables)

3 Months Ended

Mar. 31, 2021

Revenue from Contract with Customer [Abstract]

Schedule of disaggregation of revenue

The following table shows revenue disaggregated by operating area and product type:

	Successor
	Period from February 10, 2021 through March 31, 2021
	Oil		Natural Gas		NGL		Total
Appalachia	$	—	$	163	$	—	$	163
Gulf Coast	—		70		—		70
South Texas	117		28		19		164
Brazos Valley	89		15		4		108
Powder River Basin	28		14		6		48
Oil, natural gas and NGL revenue	$	234	$	290	$	29	$	553
Marketing revenue	$	162	$	97	$	18	$	277
	Predecessor
	Period from January 1, 2021 through February 9, 2021
	Oil		Natural Gas		NGL		Total
Appalachia	$	—	$	119	$	—	$	119
Gulf Coast	—		53		—		53
South Texas	92		15		15		122
Brazos Valley	67		2		2		71
Powder River Basin	20		7		6		33
Oil, natural gas and NGL revenue	$	179	$	196	$	23	$	398
Marketing revenue	$	141	$	78	$	20	$	239

	Predecessor
	Three Months Ended March 31, 2020
	Oil		Natural Gas		NGL		Total
Appalachia	$	—	$	175	$	—	$	175
Gulf Coast	—		85		—		85
South Texas	277		31		20		328
Brazos Valley	172		4		4		180
Powder River Basin	68		15		7		90
Mid-Continent	22		10		4		36
Oil, natural gas and NGL revenue	$	539	$	320	$	35	$	894
Marketing revenue from contracts with customers	$	508	$	124	$	30	$	662
Other marketing revenue	61		1		—		62
Marketing revenue	$	569	$	125	$	30	$	724

Schedule of accounts receivable

Accounts receivable as of March 31, 2021 and December 31, 2020 are detailed below:

	Successor		Predecessor
	March 31, 2021		December 31, 2020
Oil, natural gas and NGL sales	$	575	$	589
Joint interest	93		119
Other	36		68
Allowance for doubtful accounts	—		(30)
Total accounts receivable, net	$	704	$	746