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Supplemental Information on Oil and Gas Operations (Unaudited) (Narrative) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2022
USD ($)
MMBoe
$ / bbl
$ / Mcf
Dec. 31, 2021
USD ($)
MMBoe
Dec. 31, 2020
USD ($)
MMBoe
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Reserve Quantities [Line Items]            
Proved developed and undeveloped reserves, revisions due to prices 34 155 78      
Proved developed and undeveloped reserves, revisions other than price (MMBoe) (49) 43 55      
Proved developed and undeveloped reserves, additional downward revisions other than price(MMBoe)   10 20      
Proved developed and undeveloped reserves, extensions and discoveries 278 228 135      
Proved developed and undeveloped reserves revisions due to change in previously adopted development plans 22          
Proved developed and undeveloped reserves, Purchase of reserves 153 663 7      
Proved undeveloped reserves increased percentage 16.00%          
Proved undeveloped reserves as percentage of entire proved reserves 22.00%          
Purchased reserves related to acquisition, energy 44          
Proved undeveloped reserves due to drilling and development activities (MMBoe) 176          
Proved undeveloped reserves, conversion to proved developed reserves (MMBoe) 127          
Cost incurred related to development and conversion of proved undeveloped reserves | $ $ 866          
Proved undeveloped reserves revisions other than price 39          
Proved Undeveloped Reserves Revisions with Additional Revisions (17)          
Average estimated future realized price per barrel of oil used to estimate future cash inflows for proved oil reserves | $ / bbl 93.53          
Average estimated future realized price per Mcf of gas used to estimate future cash inflows for proved gas reserves | $ / Mcf 5.41          
Average estimated future realized price per barrel of natural gas liquids used to estimate future cash inflows for proved NGL reserves | $ / bbl 34.58          
Future development costs | $ $ 5,176 $ 3,689 $ 1,747      
Future dismantlement, abandonment and rehabilitation costs | $ $ 800          
Scenario Forecast [Member]            
Reserve Quantities [Line Items]            
Future development costs | $       $ 700 $ 1,200 $ 1,700
Maximum [Member]            
Reserve Quantities [Line Items]            
Proved developed and undeveloped reserves, revisions other than price (MMBoe)   53 75      
Delaware Basin            
Reserve Quantities [Line Items]            
Proved developed and undeveloped reserves, revisions other than price (MMBoe) 33 23 40      
Proved developed and undeveloped reserves, extensions and discoveries 255 209 117      
Proved developed and undeveloped reserves, Purchase of reserves   538        
Proved undeveloped reserves percentage 80.00%          
Percentage of extensions and discoveries proved undeveloped reserves 97.00%          
Delaware Basin | Maximum [Member]            
Reserve Quantities [Line Items]            
Proved undeveloped reserves revisions other than price (9)          
Williston Basin            
Reserve Quantities [Line Items]            
Proved developed and undeveloped reserves, revisions other than price (MMBoe)   12        
Proved developed and undeveloped reserves, extensions and discoveries 5 6        
Proved developed and undeveloped reserves, Purchase of reserves 66 125        
Percentage of purchase reserves related to acquisition 51.00%          
STACK [Member]            
Reserve Quantities [Line Items]            
Proved developed and undeveloped reserves, revisions other than price (MMBoe)   12 22      
Proved developed and undeveloped reserves, extensions and discoveries 5 8 8      
Eagle Ford [Member]            
Reserve Quantities [Line Items]            
Proved developed and undeveloped reserves, extensions and discoveries 6 3 5      
Proved developed and undeveloped reserves, Purchase of reserves 87          
Percentage of purchase reserves related to acquisition 49.00%          
Powder River Basin [Member]            
Reserve Quantities [Line Items]            
Proved developed and undeveloped reserves, revisions other than price (MMBoe) 5          
Proved developed and undeveloped reserves, extensions and discoveries 7 2 5      
Powder River Basin [Member] | Maximum [Member]            
Reserve Quantities [Line Items]            
Proved undeveloped reserves revisions other than price (6)          
Anadarko Basin            
Reserve Quantities [Line Items]            
Proved developed and undeveloped reserves, revisions other than price (MMBoe) 4          
Anadarko Basin | Maximum [Member]            
Reserve Quantities [Line Items]            
Proved undeveloped reserves revisions other than price (7)