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Exploratory Well and Project Costs (Tables)
9 Months Ended
Sep. 30, 2023
Extractive Industries [Abstract]  
Schedule of capitalized exploratory well costs, roll forward
The changes in capitalized exploratory well and project costs are as follows:
 
Nine Months Ended September 30, 2023
 (in millions)
Beginning capitalized exploratory well and project costs$834 
Additions to exploratory well and project costs pending the determination of proved reserves3,047 
Reclassifications due to determination of proved reserves(2,678)
Ending capitalized exploratory well and project costs$1,203 
Schedule of capitalized exploratory costs and the number of projects for which exploratory costs have been capitalized
Aging of capitalized exploratory costs and the number of projects for which exploratory well costs have been capitalized based on the date drilling was completed, are as follows:
 As of September 30, 2023As of December 31, 2022
 
(in millions, except project counts)
One year or less$1,203 $834 
More than one year— — 
$1,203 $834 
Number of projects with exploratory well costs that have been suspended for a period greater than one year— —