Supplemental Oil and Gas Disclosures (Unaudited) (Summary of Changes in Reserves) (Details) bbl in Thousands, Mcfe in Millions, Mcf in Millions	12 Months Ended
	Dec. 31, 2023 Mcfe Mcf bbl	Dec. 31, 2022 Mcfe bbl Mcf	Dec. 31, 2021 Mcfe bbl Mcf
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]
Proved reserves, beginning of period, (bcfe)	21,625	21,148	11,990
Net revisions
Price revisions	(1,847)	55	415
Performance and production revisions (3)	(125)	(230)	2,270
Total net revisions	(1,972)	(175)	2,685
Extensions, discoveries and other additions
Proved developed (2)	80	406	197
Proved undeveloped (2)	1,946	2,022	1,764
Total reserve additions	2,026	2,428	1,961
Production	(1,669)	(1,733)	(1,240)
Acquisition of reserves in place (3)	0	0	5,753
Disposition of reserves in place	(350)	(43)	(1)
Proved reserves, end of period, (bcfe)	19,660	21,625	21,148
Natural Gas
Extensions, discoveries and other additions
Proved reserves, reclassified to revision of previous estimate other than price | Mcf			1,155
Proved developed and undeveloped reserves, other than price revisions, positive, performance revisions | Mcf	25	272
Proved developed and undeveloped reserves, other than price revisions, additions, infilled development (energy) | Mcf	647	303
Proved developed and undeveloped reserves, other than price revisions, downward revisions, change in development plan (energy) | Mcf	1,089	1,033
Proved developed reserves, reclassified to performance and production revisions | Mcf	34		158
Proved undeveloped reserves, reclassified to performance and production revisions | Mcf			997
Oil
Extensions, discoveries and other additions
Proved reserves, reclassified to revision of previous estimate other than price | bbl			15
Proved developed and undeveloped reserves, other than price revisions, negative, performance revisions | bbl	3,062	681
Proved developed and undeveloped reserves, other than price revisions, additions, infilled development (energy) | bbl	12,493	5,254
Proved developed and undeveloped reserves, other than price revisions, downward revisions, change in development plan (energy) | bbl	13,061	6,722
Proved developed reserves, reclassified to performance and production revisions | bbl			2
Proved undeveloped reserves, reclassified to performance and production revisions | bbl			13
NGL
Extensions, discoveries and other additions
Proved reserves, reclassified to revision of previous estimate other than price | bbl			126
Proved developed and undeveloped reserves, other than price revisions, positive, performance revisions | bbl	28,189	41,490
Proved developed and undeveloped reserves, other than price revisions, additions, infilled development (energy) | bbl	85,378	40,423
Proved developed and undeveloped reserves, other than price revisions, downward revisions, change in development plan (energy) | bbl	61,284	41,775
Proved developed reserves, reclassified to performance and production revisions | bbl			14
Proved undeveloped reserves, reclassified to performance and production revisions | bbl			112
Appalachia
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]
Proved reserves, beginning of period, (bcfe)	15,666	15,527	11,989
Net revisions
Price revisions	(570)	(4)	415
Performance and production revisions (3)	189	(33)	2,271
Total net revisions	(381)	(37)	2,686
Extensions, discoveries and other additions
Proved developed (2)	14	235	197
Proved undeveloped (2)	769	1,038	1,764
Total reserve additions	783	1,273	1,961
Production	(1,034)	(1,054)	(1,108)
Acquisition of reserves in place (3)	0	0	0
Disposition of reserves in place	(349)	(43)	(1)
Proved reserves, end of period, (bcfe)	14,685	15,666	15,527
Proved developed and undeveloped reserves, performance and production revisions, positive performance revisions (energy) | Mcf	246	381
Proved developed and undeveloped reserves, performance and production revisions, additions, infill development (energy) | Mcf	1,200	577
Proved developed and undeveloped reserves, performance and production downward revisions, change in development plans (energy) | Mcf	(1,257)	991
Haynesville
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]
Proved reserves, beginning of period, (bcfe)	5,959	5,621	0
Net revisions
Price revisions	(1,277)	59	0
Performance and production revisions (3)	(314)	(197)	0
Total net revisions	(1,591)	(138)	0
Extensions, discoveries and other additions
Proved developed (2)	66	171	0
Proved undeveloped (2)	1,177	984	0
Total reserve additions	1,243	1,155	0
Production	(635)	(679)	(132)
Acquisition of reserves in place (3)	0	0	5,753
Disposition of reserves in place	(1)	0	0
Proved reserves, end of period, (bcfe)	4,975	5,959	5,621
Other
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]
Proved reserves, beginning of period, (bcfe)	0	0	1
Net revisions
Price revisions	0	0	0
Performance and production revisions (3)	0	0	(1)
Total net revisions	0	0	(1)
Extensions, discoveries and other additions
Proved developed (2)	0	0	0
Proved undeveloped (2)	0	0	0
Total reserve additions	0	0	0
Production	0	0	0
Acquisition of reserves in place (3)	0	0	0
Disposition of reserves in place	0	0	0
Proved reserves, end of period, (bcfe)	0	0	0
Haynesville
Extensions, discoveries and other additions
Proved developed and undeveloped reserves, performance and production revisions, positive performance revisions (energy) | Mcf	(70)	136
Proved developed and undeveloped reserves, performance and production downward revisions, change in development plans (energy) | Mcf	(278)	333