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

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