Exploration Expense (Tables)

3 Months Ended

Mar. 31, 2021

Extractive Industries [Abstract]

Schedule of exploration expense

A summary of our exploration expense is as follows:

	Successor		Predecessor
	Period from February 10, 2021 through March 31, 2021		Period from January 1, 2021 through February 9, 2021		Three Months Ended March 31, 2020
Impairments of unproved properties	$	—	$	2	$	272
Dry hole expense	—		—		7
Geological and geophysical expense and other	1		—		3
Exploration expense	$	1	$	2	$	282