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Asset Retirement Obligations (Tables)
12 Months Ended
Dec. 31, 2023
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Changes to the Company's Before-tax Asset Retirement Obligation
The following table indicates the changes to the company’s
before-tax
asset retirement obligations in 2023, 2022 and 2021:
 
     
2023
     2022      2021  
Balance at January 1
  
$
12,701
 
   $ 12,808      $ 13,616  
Liabilities assumed in the PDC acquisition
  
 
220
 
             
Liabilities incurred
  
 
183
 
     9        31  
Liabilities settled
  
 
(1,565
     (1,281      (1,887
Accretion expense
  
 
593
 
     560        616  
Revisions in estimated cash flows
  
 
1,701
 
     605        432  
Balance at December 31
  
$
    13,833
 
   $     12,701      $     12,808