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Supplemental Gas Data (unaudited) - Proved Undeveloped Reserves (Details)
bbl in Thousands, Mcfe in Thousands, Mcf in Thousands, $ in Thousands, MMcfe in Millions
 12 Months Ended
Dec. 31, 2022
USD ($)
Mcfe
well
bbl
Mcf
Dec. 31, 2021
USD ($)
Mcfe
MMcfe
Mcf
bbl
Dec. 31, 2020
USD ($)
Mcfe
well
bbl
Mcf
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]      
Beginning balance (energy) 9,625,730 9,549,758 8,425,667
Revisions (energy) (387,320) (327,050) 740,129
Price changes (energy) 24,904 86,532 (1,351,934)
Extensions and Discoveries (energy) 1,123,745 906,738 2,246,968
Production (MMcfe) (580,169) (590,248) (511,072)
Ending balance (energy) 9,806,890 9,625,730 9,549,758
Proved developed resources (energy) 6,221,422 5,905,611 5,199,748
Proved undeveloped resources (energy) 3,585,468 3,720,119 4,350,010
Downward revision due to plan changes (energy) 24,000 356,000 677,000
Upward revision from increased performance (energy) 33,000 331,000 579,000
Proved and unproved resources, extensions and discoveries (energy) 23,000 26,000 70,000
Increase in reserve due to decrease in operating costs (energy)     853,000
Downward revision for acreage consolidation (energy)   267,000  
Downward revision due to 5 year rule (energy)   60,000  
Performance revision associated with proved developed producing assets (energy)   (46,000)  
Capital spent related to undeveloped reserves transferred to developed | $ $ 565,754 $ 465,861 $ 487,291
Downward revision due to risk in well development (energy) | MMcfe   (20)  
Reserves reported for more than five years 290    
Utica      
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]      
Number of wells removed from development plan | well     4
Utica | Central Pennsylvania and Southwest Pennsylvania      
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]      
Proved and unproved resources, extensions and discoveries (energy) 377,000    
Number of dry gas wells added | well 14    
Marcellus      
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]      
Number of wells removed from development plan | well     23
Marcellus | Southwest Pennsylvania and West Virginia      
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]      
Proved and unproved resources, extensions and discoveries (energy) 724,000    
Number of dry gas wells added | well 46    
Shale      
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]      
Downward revision due to plan changes (energy) 66,000    
Downward revision for acreage consolidation (energy) 298,000    
Natural Gas      
Proved Developed and Undeveloped Reserves [Roll Forward]      
Beginning balance (volume) | Mcf 8,987,807 9,034,066 7,938,406
Revisions (volume) | Mcf (339,878) (409,215) 407,836
Price Changes (volume) | Mcf 24,795 82,248 (1,019,523)
Extension and Discoveries (volume) | Mcf 1,055,250 832,696 2,188,773
Production (volume) | Mcf (540,696) (551,988) (481,426)
Ending balance (volume) | Mcf 9,187,278 8,987,807 9,034,066
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]      
Proved developed resources (volume) | Mcf 5,788,814 5,569,332 4,939,283
Proved undeveloped resources (volume) | Mcf 3,398,464 3,418,475 4,094,783
NGLs      
Proved Developed and Undeveloped Reserves [Roll Forward]      
Beginning balance (volume) | bbl 102,285 81,867 75,844
Revisions (volume) | bbl (6,140) 13,655 51,857
Price Changes (volume) | bbl 17 692 (50,456)
Extension and Discoveries (volume) | bbl 10,324 12,047 9,299
Production (volume) | bbl (6,333) (5,976) (4,677)
Ending balance (volume) | bbl 100,153 102,285 81,867
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]      
Proved developed resources (volume) | bbl 70,063 53,204 42,204
Proved undeveloped resources (volume) | bbl 30,090 49,081 39,664
Condensate & Crude Oil      
Proved Developed and Undeveloped Reserves [Roll Forward]      
Beginning balance (volume) | bbl 4,036 4,081 5,366
Revisions (volume) | bbl (1,768) 39 3,525
Price Changes (volume) | bbl 1 22 (4,946)
Extension and Discoveries (volume) | bbl 1,092 294 400
Production (volume) | bbl (246) (400) (264)
Ending balance (volume) | bbl 3,115 4,036 4,081
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]      
Proved developed resources (volume) | bbl 2,038 2,843 1,207
Proved undeveloped resources (volume) | bbl 1,077 1,193 2,874
Proved Undeveloped      
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]      
Beginning balance (energy) 3,720,119    
Undeveloped Reserves Transferred to Developed (energy) (902,105)    
Extensions and Discoveries (energy) 1,101,028    
Ending balance (energy) 3,585,468 3,720,119  
Capital spent related to undeveloped reserves transferred to developed | $ $ 281,727    
Proved Undeveloped | Price Revisions      
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]      
Revisions (energy) (3,012)    
Proved Undeveloped | Revisions Due to Plan Changes      
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]      
Revisions (energy) (363,644)    
Proved Undeveloped | Revisions Due to Changes Related to Well Performance      
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]      
Revisions (energy) 33,082