Annual report [Section 13 and 15(d), not S-K Item 405]

SUPPLEMENTAL INFORMATION ON OIL AND GAS EXPLORATION AND PRODUCTION ACTIVITIES (UNAUDITED) - Schedule of Oil and Gas Reserves (Details)

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SUPPLEMENTAL INFORMATION ON OIL AND GAS EXPLORATION AND PRODUCTION ACTIVITIES (UNAUDITED) - Schedule of Oil and Gas Reserves (Details) - bbl
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Proved Developed and Undeveloped Reserves [Roll Forward]        
Beginning of the period 3,969,000,000 4,214,000,000 4,048,000,000  
Purchases of reserves 0 0 0  
Extensions and discoveries 701,000,000 547,000,000 996,000,000  
Sales of reserves 0 0 0  
Revisions of prior reserve estimates (38,000,000) (406,000,000) (445,000,000)  
Current production (379,000,000) (386,000,000) (385,000,000)  
End of period 4,253,000,000 3,969,000,000 4,214,000,000  
Proved developed reserves (Volume) 2,404,000,000 2,109,000,000 2,203,000,000 2,295,000,000
Proved undeveloped reserves (Volume) 1,848,000,000 1,861,000,000 2,011,000,000 1,752,000,000
Crude Oil, Condensate, and Natural Gas Liquids (NGL)        
Proved Developed and Undeveloped Reserves [Roll Forward]        
Beginning of the period 22,000,000 19,000,000 18,000,000  
Purchases of reserves 0 0 0  
Extensions and discoveries 3,000,000 5,000,000 6,000,000  
Sales of reserves 0 0 0  
Revisions of prior reserve estimates 1,000,000 0 (4,000,000)  
Current production (2,000,000) (1,000,000) (1,000,000)  
End of period 24,000,000 22,000,000 19,000,000  
Proved developed reserves (Volume) 8,000,000 7,000,000 6,000,000 9,000,000
Proved undeveloped reserves (Volume) 16,000,000 15,000,000 12,000,000 9,000,000
Natural Gas        
Proved Developed and Undeveloped Reserves [Roll Forward]        
Beginning of the period 3,356,000,000 3,725,000,000 3,612,000,000  
Purchases of reserves 0 0 0  
Extensions and discoveries 616,000,000 398,000,000 875,000,000  
Sales of reserves 0 0 0  
Revisions of prior reserve estimates (22,000,000) (413,000,000) (411,000,000)  
Current production (338,000,000) (354,000,000) (350,000,000)  
End of period 3,612,000,000 3,356,000,000 3,725,000,000  
Proved developed reserves (Volume) 2,157,000,000 1,879,000,000 1,980,000,000 2,034,000,000
Proved undeveloped reserves (Volume) 1,455,000,000 1,478,000,000 1,746,000,000 1,578,000,000
Natural Gas Liquids        
Proved Developed and Undeveloped Reserves [Roll Forward]        
Beginning of the period 80,000,000 63,000,000 54,000,000  
Purchases of reserves 0 0 0  
Extensions and discoveries 11,000,000 20,000,000 14,000,000  
Sales of reserves 0 0 0  
Revisions of prior reserve estimates (4,000,000) 1,000,000 (1,000,000)  
Current production (5,000,000) (4,000,000) (4,000,000)  
End of period 83,000,000 80,000,000 63,000,000  
Proved developed reserves (Volume) 33,000,000 31,000,000 31,000,000 34,000,000
Proved undeveloped reserves (Volume) 50,000,000 49,000,000 32,000,000 20,000,000