Capitalized Exploratory Well Costs (Tables)

3 Months Ended

Mar. 31, 2020

Extractive Industries [Abstract]

Summary of changes in capitalized well costs

A summary of the changes in our capitalized well costs for the Current Quarter is detailed below. Additions pending the determination of proved reserves excludes amounts capitalized and subsequently charged to expense within the same year.

	Three Months Ended March 31, 2020
	($ in millions)
Balance as of January 1	$	7
Charges to exploration expense	(7		)
Balance as of March 31	$	—