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Supplemental Information on Oil and Gas Operations (Unaudited) (Narrative) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
MMBoe
$ / bbl
$ / Mcf
Dec. 31, 2020
USD ($)
MMBoe
Dec. 31, 2019
USD ($)
MMBoe
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Reserve Quantities [Line Items]            
Proved developed and undeveloped reserves, revisions due to prices [1] 155 (78) (28)      
Proved developed and undeveloped reserves, revisions other than price (MMBoe) 43 55        
Proved developed and undeveloped reserves, additional downward revisions other than price(MMBoe) 10 20 5      
Proved developed and undeveloped reserves, extensions and discoveries [1] 228 135 160      
Proved developed and undeveloped reserves, extensions and discoveries [1] 663 7 6      
Proved undeveloped reserves increased percentage 91.00%          
Proved undeveloped reserves as percentage of entire proved reserves 21.00%          
Proved undeveloped reserves due to drilling and development activities (MMBoe) 160          
Cost incurred related to development and conversion of proved undeveloped reserves | $ $ 612          
Average estimated future realized price per barrel of oil used to estimate future cash inflows for proved oil reserves | $ / bbl 64.17          
Average estimated future realized price per Mcf of gas used to estimate future cash inflows for proved gas reserves | $ / Mcf 3.05          
Average estimated future realized price per barrel of natural gas liquids used to estimate future cash inflows for proved NGL reserves | $ / bbl 27.60          
Future development costs | $ $ 3,689 $ 1,747 $ 2,093      
Future dismantlement, abandonment and rehabilitation costs | $ $ 500          
Scenario Forecast [Member]            
Reserve Quantities [Line Items]            
Future development costs | $       $ 600 $ 700 $ 1,100
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) 23 40 6      
Proved developed and undeveloped reserves, extensions and discoveries 209 117 77      
Proved developed and undeveloped reserves, extensions and discoveries 538          
Proved undeveloped reserves percentage 85.00%          
Percentage of purchase reserves related to acquisition 98.00%          
Purchased reserves related to acquisition, energy 90          
Percentage of extensions and discoveries proved undeveloped reserves 92.00%          
Proved undeveloped reserves, conversion to proved developed reserves (MMBoe) 107          
Delaware Basin | Maximum [Member]            
Reserve Quantities [Line Items]            
Proved undeveloped reserves revisions other than price 14          
Delaware Basin | Minimum [Member]            
Reserve Quantities [Line Items]            
Proved undeveloped reserves revisions other than price (3)          
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 6          
Proved developed and undeveloped reserves, extensions and discoveries 125          
STACK [Member]            
Reserve Quantities [Line Items]            
Proved developed and undeveloped reserves, revisions other than price (MMBoe) 12 22 9      
Proved developed and undeveloped reserves, extensions and discoveries 8 8 37      
Eagle Ford [Member]            
Reserve Quantities [Line Items]            
Proved developed and undeveloped reserves, extensions and discoveries 3 5 18      
Powder River Basin [Member]            
Reserve Quantities [Line Items]            
Proved developed and undeveloped reserves, extensions and discoveries 2 5 28      
Anadarko Basin | Maximum [Member]            
Reserve Quantities [Line Items]            
Proved undeveloped reserves revisions other than price 6          
Anadarko Basin | Minimum [Member]            
Reserve Quantities [Line Items]            
Proved undeveloped reserves revisions other than price (6)          
[1] Gas reserves are converted to Boe at the rate of six Mcf per Bbl of oil, based upon the approximate relative energy content of gas and oil. NGL reserves are converted to Boe on a one-to-one basis with oil. The conversion rates are not necessarily indicative of the relationship of oil, natural gas and NGL prices.