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Supplemental Information on Oil and Gas Operations (Unaudited) (Proved Developed and Undeveloped Reserves) (Details)
 12 Months Ended
Dec. 31, 2024
MMBoe
MMcfe
MMBbls
Bcf
Dec. 31, 2023
MMBoe
MMcfe
MMBbls
Bcf
Dec. 31, 2022
MMBoe
Bcf
MMBbls
Dec. 31, 2021
MMBoe
MMBbls
Bcf
Reserve Quantities [Line Items]        
Proved developed and undeveloped reserves, beginning balance 1,817 1,815 1,625  
Proved developed and undeveloped reserves, revisions due to prices | MMBoe (54) (78) 34  
Proved developed and undeveloped reserves, revisions other than price | MMBoe 75 (1) (49)  
Proved developed and undeveloped reserves, extensions and discoveries | MMBoe 340 322 278  
Proved developed and undeveloped reserves, Purchase of reserves | MMBoe 247   153  
Proved developed and undeveloped reserves, production | MMBoe (270) (240) (223)  
Proved developed and undeveloped reserves, sale of reserves | MMBoe   (1) (3)  
Proved developed and undeveloped reserves, ending balance 2,155 1,817 1,815  
Proved developed reserves | MMBoe 1,715 1,425 1,419 1,285
Proved undeveloped reserves | MMBoe 440 392 396 340
Conversion rate of gas reserves from barrels of oil to Boe 6      
Oil [Member]        
Reserve Quantities [Line Items]        
Proved developed and undeveloped reserves, beginning balance 786 793 709  
Proved developed and undeveloped reserves, revisions due to prices (9) (25) 15  
Proved developed and undeveloped reserves, revisions other than price 3 (12) (55)  
Proved developed and undeveloped reserves, extensions and discoveries 129 147 127  
Proved developed and undeveloped reserves, Purchase of reserves 120   106  
Proved developed and undeveloped reserves, production (127) (117) (109)  
Proved developed and undeveloped reserves, sale of reserves   0 0  
Proved developed and undeveloped reserves, ending balance 902 786 793  
Proved developed reserves 706 603 596 544
Proved undeveloped reserves 196 183 197 165
Natural Gas [Member]        
Reserve Quantities [Line Items]        
Proved developed and undeveloped reserves, beginning balance | Bcf [1] 3,182 3,175 2,878  
Proved developed and undeveloped reserves, revisions due to prices | Bcf [1] (187) (189) 61  
Proved developed and undeveloped reserves, revisions other than price | Bcf [1] 245 58 13  
Proved developed and undeveloped reserves, extensions and discoveries | Bcf [1] 646 525 449  
Proved developed and undeveloped reserves, Purchase of reserves | Bcf [1] 328   137  
Proved developed and undeveloped reserves, production | Bcf [1] (438) (385) (356)  
Proved developed and undeveloped reserves, sale of reserves | Bcf [1]   (2) (7)  
Proved developed and undeveloped reserves, ending balance | Bcf [1] 3,776 3,182 3,175  
Proved developed reserves | Bcf [1] 3,057 2,560 2,595 2,361
Proved undeveloped reserves | Bcf [1] 719 622 580 517
Natural Gas Liquids [Member]        
Reserve Quantities [Line Items]        
Proved developed and undeveloped reserves, beginning balance 500 493 437  
Proved developed and undeveloped reserves, revisions due to prices (14) (22) 8  
Proved developed and undeveloped reserves, revisions other than price 31 1 3  
Proved developed and undeveloped reserves, extensions and discoveries 104 87 76  
Proved developed and undeveloped reserves, Purchase of reserves 73   24  
Proved developed and undeveloped reserves, production (70) (59) (54)  
Proved developed and undeveloped reserves, sale of reserves   0 (1)  
Proved developed and undeveloped reserves, ending balance 624 500 493  
Proved developed reserves 500 395 391 348
Proved undeveloped reserves 124 105 102 89
[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.