Natural Gas and Oil Property Transactions - Narrative (Details) shares in Millions, $ in Millions							1 Months Ended	3 Months Ended	9 Months Ended	10 Months Ended	12 Months Ended
	Oct. 01, 2024 USD ($) shares	Nov. 30, 2023 USD ($)	Apr. 28, 2023 USD ($)	Mar. 20, 2023 USD ($)	Mar. 25, 2022 USD ($)	Mar. 09, 2022 USD ($) shares	Nov. 30, 2023 USD ($) $ / bbl	Dec. 31, 2024 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Aug. 31, 2023 USD ($)	Feb. 28, 2023 USD ($)	Jan. 31, 2023 USD ($)
Business Acquisition [Line Items]
Natural gas, oil and NGL derivatives											$ (38)	$ 1,728	$ (2,680)
Costs and expenses											5,038	5,579	7,963
Net earnings											(714)	2,419	4,936
Contingent Consideration
Business Acquisition [Line Items]
Derivative, fair value, net												12
Disposal group, disposed of by sale, not discontinued operations
Business Acquisition [Line Items]
Gain (loss) on sale of oil and natural gas properties													293
Deferred consideration amortization											31	24
Proceeds from divestitures of property and equipment					$ 450
Disposal group, disposed of by sale, not discontinued operations | Portion of Eagle Ford Assets
Business Acquisition [Line Items]
Consideration received																$ 1,425
Purchase price				$ 225
Gain (loss) on sale of oil and natural gas properties				337
Disposal group, disposed of by sale, not discontinued operations | Portion of Eagle Ford Assets | Other current assets
Business Acquisition [Line Items]
Deferred consideration reflected with assets								$ 59			59	58
Disposal group, disposed of by sale, not discontinued operations | Portion of Eagle Ford Assets | Other noncurrent assets
Business Acquisition [Line Items]
Deferred consideration reflected with assets								89			89	135
Disposal group, disposed of by sale, not discontinued operations | Portion of Eagle Ford Assets | First Three Years
Business Acquisition [Line Items]
Deferred consideration paid in installments				60
Disposal group, disposed of by sale, not discontinued operations | Portion of Eagle Ford Assets | Fourth Year
Business Acquisition [Line Items]
Deferred consideration paid in installments				$ 45
Disposal group, disposed of by sale, not discontinued operations | Portion Of Remaining Eagle Ford Assets
Business Acquisition [Line Items]
Consideration received															$ 1,400
Purchase price			$ 225
Payment period			4 years
Gain (loss) on sale of oil and natural gas properties			$ 470
ARO liabilities			53
Disposal group, disposed of by sale, not discontinued operations | Portion Of Remaining Eagle Ford Assets | Other current assets
Business Acquisition [Line Items]
Deferred consideration reflected with assets								55			55	55
Disposal group, disposed of by sale, not discontinued operations | Portion Of Remaining Eagle Ford Assets | Other noncurrent assets
Business Acquisition [Line Items]
Deferred consideration reflected with assets								99			99	144
Disposal group, disposed of by sale, not discontinued operations | Portion Of Remaining Eagle Ford Assets | Next Four Years
Business Acquisition [Line Items]
Deferred consideration paid in installments			$ 56
Disposal group, disposed of by sale, not discontinued operations | Final Portion of Eagle Ford Assets
Business Acquisition [Line Items]
Consideration received														$ 700
Purchase price														$ 50
Gain (loss) on sale of oil and natural gas properties		$ 140
ARO liabilities		11					$ 11
Disposal group, disposed of by sale, not discontinued operations | Final Portion of Eagle Ford Assets | Other current assets
Business Acquisition [Line Items]
Deferred consideration reflected with assets												46
Natural gas, oil and NGL
Business Acquisition [Line Items]
Revenues											2,969	3,547	9,892
Marketing
Business Acquisition [Line Items]
Revenues											1,290	$ 2,500	4,231
WTI NYMEX Price Average $75 to $80 per Barrel | Minimum
Business Acquisition [Line Items]
Average sales price (in usd per unit) | $ / bbl							75
WTI NYMEX Price Average $75 to $80 per Barrel | Maximum
Business Acquisition [Line Items]
Average sales price (in usd per unit) | $ / bbl							80
WTI NYMEX Price Average $75 to $80 per Barrel | Disposal group, disposed of by sale, not discontinued operations | Final Portion of Eagle Ford Assets
Business Acquisition [Line Items]
Consideration received		25					$ 25	25			25
WTI NYMEX Price Average Above $80 per Barrel
Business Acquisition [Line Items]
Average sales price (in usd per unit) | $ / bbl							80
WTI NYMEX Price Average Above $80 per Barrel | Disposal group, disposed of by sale, not discontinued operations | Final Portion of Eagle Ford Assets
Business Acquisition [Line Items]
Consideration received		$ 50					$ 50
Post-Close Adjustments | Disposal group, disposed of by sale, not discontinued operations
Business Acquisition [Line Items]
Gain (loss) on sale of oil and natural gas properties									$ 13
Southwestern
Business Acquisition [Line Items]
Common stock issued for acquisition (in shares) | shares	95.7
Share conversion ratio	0.0867
Total value of common stock issued	$ 7,900
Consulting and legal fees											312
Employee related expenses											$ 148
Natural gas, oil and NGL derivatives								(34)
Costs and expenses								1,384
Net earnings								36
Consideration transferred	8,473
Cash	$ 585
Southwestern | Natural gas, oil and NGL
Business Acquisition [Line Items]
Revenues								1,021
Southwestern | Marketing
Business Acquisition [Line Items]
Revenues								$ 482
Marcellus
Business Acquisition [Line Items]
Consulting and legal fees													$ 41
Natural gas, oil and NGL derivatives										$ (379)
Costs and expenses										483
Net earnings										381
Consideration transferred						$ 2,770
Cash						$ 2,000
Issuance of common stock for Acquisition (in shares) | shares						9.4
Marcellus | Natural gas, oil and NGL
Business Acquisition [Line Items]
Revenues										1,331
Marcellus | Marketing
Business Acquisition [Line Items]
Revenues										$ 20
Marcellus | Exit credit facility
Business Acquisition [Line Items]
Revolving credit facility						$ 914