v3.25.4
Supplemental Information on Oil and Gas Producing Activities (Unaudited) - Proved reserves (Details)
 12 Months Ended
Dec. 31, 2025
Bcfe
Bcf
MMBbls
Dec. 31, 2024
Bcfe
MMBbls
Bcf
Dec. 31, 2023
Bcfe
MMBbls
Bcf
Proved developed and undeveloped reserves:      
Balance at the beginning of the period | Bcfe 17,903 18,121 17,759
Oil and Gas, Proved Reserve, Quantity, Energy, Revision of Previous Estimate | Bcfe 1,331 435 1,187
Oil and Gas, Proved Reserve, Quantity, Energy, Addition from Extension and Discovery | Bcfe 665 783 413
Production | Bcfe (1,256) (1,252) (1,238)
Sales | Bcfe   (184)  
Purchase | Bcfe 506    
Balance at the end of the period | Bcfe 19,149 17,903 18,121
Oil and Gas Reserves      
Proved developed reserves | Bcfe 14,478 13,747 13,783
Proved undeveloped reserves | Bcfe 4,671 4,156 4,338
VIE, Martica      
Proved developed and undeveloped reserves:      
Balance at the beginning of the period | Bcfe 57 75  
Balance at the end of the period | Bcfe 38 57 75
Oil and Gas Reserves      
Proved developed reserves | Bcfe 38 57 75
Proved undeveloped reserves | Bcfe 0 0 0
Natural gas      
Proved developed and undeveloped reserves:      
Balance at the beginning of the period | Bcf 10,603 10,614 10,270
Revisions | Bcf 1,140 265 863
Extensions, discoveries and other additions | Bcf 553 651 296
Production | Bcf (808) (793) (815)
Divestitures of reserves | Bcf   (134)  
Acquisition of reserves | Bcf 282    
Balance at the end of the period | Bcf 11,770 10,603 10,614
Oil and Gas Reserves      
Proved developed reserves | Bcf 8,388 7,876 7,912
Proved undeveloped reserves | Bcf 3,382 2,727 2,702
Natural gas | VIE, Martica      
Proved developed and undeveloped reserves:      
Balance at the beginning of the period | Bcf 44 58  
Balance at the end of the period | Bcf 30 44 58
Oil and Gas Reserves      
Proved developed reserves | Bcf 30 44 58
NGLS      
Proved developed and undeveloped reserves:      
Balance at the beginning of the period 1,193 1,222 1,217
Revisions 32 31 54
Extensions, discoveries and other additions 18 21 18
Production (72) (73) (67)
Divestitures of reserves   (8)  
Acquisition of reserves 37    
Balance at the end of the period 1,208 1,193 1,222
Oil and Gas Reserves      
Proved developed reserves 1,003 966 963
Proved undeveloped reserves 205 227 259
NGLS | VIE, Martica      
Proved developed and undeveloped reserves:      
Balance at the beginning of the period 2 3  
Balance at the end of the period 1 2 3
Oil and Gas Reserves      
Proved developed reserves 1 2 3
Oil sales      
Proved developed and undeveloped reserves:      
Balance at the beginning of the period 23 29 31
Revisions 1 (2)  
Extensions, discoveries and other additions 1 1 2
Production (3) (4) (4)
Divestitures of reserves   (1)  
Balance at the end of the period 22 23 29
Oil and Gas Reserves      
Proved developed reserves 12 13 15
Proved undeveloped reserves 10 10 14
Oil sales | VIE, Martica      
Proved developed and undeveloped reserves:      
Balance at the beginning of the period   0.1  
Balance at the end of the period     0.1
Oil and Gas Reserves      
Proved developed reserves     0.1