v3.26.3
Mergers, Acquisitions, and Divestitures - Narrative (Details)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Apr. 30, 2026
a
Jan. 30, 2026
shares
Nov. 03, 2026
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Business Combination [Line Items]              
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share | shares   1.45          
Disposal Group [Line Items]              
Net proceeds from the sale of oil and gas properties           $ 889 $ 0
Gain (loss) on divestiture activity       $ (2) $ 0 260 0
Income (loss) before income taxes       123 204 1,102 689
Subsequent Event              
Disposal Group [Line Items]              
Gain (loss) on divestiture activity     $ 260        
South Texas Divestiture | Disposal Group, Disposed of by Sale, Not Discontinued Operations              
Disposal Group [Line Items]              
Disposal Group, Not Discontinued Operation, Net Acres Divested | a 61,000            
Income (loss) before income taxes       0 $ 29 61 $ 98
South Texas Divestiture | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Subsequent Event              
Disposal Group [Line Items]              
Net proceeds from the sale of oil and gas properties     $ 894        
Civitas Resources Merger              
Business Combination [Line Items]              
Business Combination, Effective Date of Acquisition   Jan. 30, 2026          
Business Combination, Voting Equity Interest Acquired, Percentage   100.00%          
Shares of common stock issued (in shares) | shares   123,715,771          
Business Combination, Acquisition-Related Cost, Expense           18  
Business Combination, Acquiree's Revenue since Acquisition Date, Actual       $ 1,300   $ 3,300