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Capitalized Exploratory Well Costs
 9 Months Ended
Sep. 30, 2020
Extractive Industries [Abstract]  
Capitalized Exploratory Well Costs
Capitalized Exploratory Well Costs
A summary of the changes in our capitalized well costs for the Current Period is detailed below.
 
 
Nine Months Ended September 30, 2020
 
 
($ in millions)
Balance as of January 1
 
$
7

Charges to exploration expense
 
(7
)
Balance as of September 30
 
$
—


As of September 30, 2020, there were no drilling and completion costs on exploratory wells pending determination of proved reserves capitalized for greater than one year.