Revenue

12 Months Ended

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

Revenue

10. Revenue

The following tables show revenue disaggregated by operating area and product type, for the periods presented:

	Successor
	Year Ended December 31, 2023
	Natural Gas		Oil		NGL		Total
Marcellus	$	1,483	$	—	$	—	$	1,483
Haynesville	1,300		—		—		1,300
Eagle Ford	70		596		98		764
Natural gas, oil and NGL revenue	$	2,853	$	596	$	98	$	3,547
Marketing revenue	$	989	$	1,332	$	179	$	2,500

	Successor
	Year Ended December 31, 2022
	Natural Gas		Oil		NGL		Total
Marcellus	$	4,041	$	—	$	—	$	4,041
Haynesville	3,481		—		—		3,481
Eagle Ford	261		1,798		212		2,271
Powder River Basin	20		66		13		99
Natural gas, oil and NGL revenue	$	7,803	$	1,864	$	225	$	9,892
Marketing revenue	$	2,455	$	1,547	$	229	$	4,231

	Successor
	Period from February 10, 2021 through December 31, 2021
	Natural Gas		Oil		NGL		Total
Marcellus	$	1,370	$	—	$	—	$	1,370
Haynesville	998		—		—		998
Eagle Ford	179		1,354		179		1,712
Powder River Basin	75		202		44		321
Natural gas, oil and NGL revenue	$	2,622	$	1,556	$	223	$	4,401
Marketing revenue	$	908	$	1,158	$	197	$	2,263

	Predecessor
	Period from January 1, 2021 through February 9, 2021
	Natural Gas		Oil		NGL		Total
Marcellus	$	119	$	—	$	—	$	119
Haynesville	53		—		—		53
Eagle Ford	17		159		17		193
Powder River Basin	7		20		6		33
Natural gas, oil and NGL revenue	$	196	$	179	$	23	$	398
Marketing revenue	$	78	$	141	$	20	$	239

Major Customers

For the 2023 Successor Period, sales to Valero Energy Corporation and Shell Energy North America accounted for approximately 17% and 10%, respectively, of total revenues (before the effects of hedging). For the 2022 Successor Period, sales to Shell Energy North America and Valero Energy Corporation accounted for approximately 13% and 10%, respectively, of total revenues (before the effects of hedging). For the 2021 Successor Period, sales to Valero Energy Corporation and Energy Transfer Crude Marketing accounted for approximately 14% and 11%, respectively, of total revenues (before the effects of hedging). For the 2021 Predecessor Period, sales to Valero Energy Corporation accounted for approximately 19% of total revenues (before the effects of hedging). No other purchasers accounted for more than 10% of our total revenues during the 2023 Successor Period, 2022 Successor Period, 2021 Successor Period or 2021 Predecessor Period.

Accounts Receivable

Accounts receivable as of December 31, 2023 and 2022 are detailed below:

	Successor
	December 31, 2023		December 31, 2022
Natural gas, oil and NGL sales	$	406	$	1,171
Joint interest	180		246
Other	8		24
Allowance for doubtful accounts	(1)		(3)
Total accounts receivable, net	$	593	$	1,438