Supplemental Oil and Gas Disclosures (Unaudited) (Summary of Changes in Reserves) (Details) Mcfe in Millions	12 Months Ended
	Dec. 31, 2022 Mcfe Bcf bbl	Dec. 31, 2021 Mcfe Bcf bbl	Dec. 31, 2020 Mcfe
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]
Proved reserves, beginning of period, (bcfe)	21,148	11,990	12,721
Net revisions
Price revisions	55	415	(4,370)
Performance and production revisions (2)	(230)	2,270	1,424
Total net revisions	(175)	2,685	(2,946)
Extensions, discoveries and other additions
Proved developed	406	197	267
Proved undeveloped	2,022	1,764	474
Total reserve additions	2,428	1,961	741
Production	(1,733)	(1,240)	(880)
Acquisition of reserves in place (1)	0	5,753	2,354
Disposition of reserves in place	(43)	(1)	0
Proved reserves, end of period, (bcfe)	21,625	21,148	11,990
Development plan duration		5 years
Natural Gas
Extensions, discoveries and other additions
Proved reserves, reclassified to revision of previous estimate other than price | Bcf		1,155,000,000
Proved developed and undeveloped reserves, other than price revisions, positive, performance revisions | Bcf	272,000,000
Proved developed and undeveloped reserves, other than price revisions, additions, infilled development (energy) | Bcf	303,000,000
Proved developed and undeveloped reserves, other than price revisions, downward revisions, change in development plan (energy) | Bcf	1,033,000,000
Proved developed reserves, reclassified to performance and production revisions | Bcf		158,000,000
Proved undeveloped reserves, reclassified to performance and production revisions | Bcf		997,000,000
Oil
Extensions, discoveries and other additions
Proved reserves, reclassified to revision of previous estimate other than price | bbl		15,000
Proved developed and undeveloped reserves, other than price revisions, negative, performance revisions | bbl	681,000
Proved developed and undeveloped reserves, other than price revisions, additions, infilled development (energy) | bbl	5,254,000
Proved developed and undeveloped reserves, other than price revisions, downward revisions, change in development plan (energy) | bbl	6,722,000
Proved developed reserves, reclassified to performance and production revisions | bbl		2,000
Proved undeveloped reserves, reclassified to performance and production revisions | bbl		13,000
NGL
Extensions, discoveries and other additions
Proved reserves, reclassified to revision of previous estimate other than price | bbl		126,000
Proved developed and undeveloped reserves, other than price revisions, positive, performance revisions | bbl	41,490,000
Proved developed and undeveloped reserves, other than price revisions, additions, infilled development (energy) | bbl	40,423,000
Proved developed and undeveloped reserves, other than price revisions, downward revisions, change in development plan (energy) | bbl	41,775,000
Proved developed reserves, reclassified to performance and production revisions | bbl		14,000
Proved undeveloped reserves, reclassified to performance and production revisions | bbl		112,000
Appalachia
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]
Proved reserves, beginning of period, (bcfe)	15,527	11,989	12,720
Net revisions
Price revisions	(4)	415	(4,370)
Performance and production revisions (2)	(33)	2,271	1,424
Total net revisions	(37)	2,686	(2,946)
Extensions, discoveries and other additions
Proved developed	235	197	267
Proved undeveloped	1,038	1,764	474
Total reserve additions	1,273	1,961	741
Production	(1,054)	(1,108)	(880)
Acquisition of reserves in place (1)	0	0	2,354
Disposition of reserves in place	(43)	(1)	0
Proved reserves, end of period, (bcfe)	15,666	15,527	11,989
Proved developed and undeveloped reserves, performance and production revisions, positive performance revisions (energy) | Bcf	381,000,000
Proved developed and undeveloped reserves, performance and production revisions, additions, infill development (energy) | Bcf	577,000,000
Proved developed and undeveloped reserves, performance and production downward revisions, change in development plans (energy) | Bcf	991,000,000
Haynesville
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]
Proved reserves, beginning of period, (bcfe)	5,621	0	0
Net revisions
Price revisions	59	0	0
Performance and production revisions (2)	(197)	0	0
Total net revisions	(138)	0	0
Extensions, discoveries and other additions
Proved developed	171	0	0
Proved undeveloped	984	0	0
Total reserve additions	1,155	0	0
Production	(679)	(132)	0
Acquisition of reserves in place (1)	0	5,753	0
Disposition of reserves in place	0	0	0
Proved reserves, end of period, (bcfe)	5,959	5,621	0
Other
Proved Developed and Undeveloped Reserve (Energy) [Roll Forward]
Proved reserves, beginning of period, (bcfe)	0	1	1
Net revisions
Price revisions	0	0	0
Performance and production revisions (2)	0	(1)	0
Total net revisions	0	(1)	0
Extensions, discoveries and other additions
Proved developed	0	0	0
Proved undeveloped	0	0	0
Total reserve additions	0	0	0
Production	0	0	0
Acquisition of reserves in place (1)	0	0	0
Disposition of reserves in place	0	0	0
Proved reserves, end of period, (bcfe)	0	0	1
Haynesville
Extensions, discoveries and other additions
Proved developed and undeveloped reserves, performance and production revisions, positive performance revisions (energy) | Bcf	136,000,000
Proved developed and undeveloped reserves, performance and production downward revisions, change in development plans (energy) | Bcf	333,000,000