Segment Information - Schedule of Segment Reporting Information (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2022 USD ($) segment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			2
Revenues from contracts with customers			$ 7,540	$ 5,601	$ 3,097
Net gain (loss) on commodity derivatives			(114)	(383)	116
Income (loss) from equity method investments			613	253	(161)
Net gain (loss) on disposal of assets			(38)	(19)	9
Other income			35	15	25
Production			690	534	555
Shipping, handling and other operating			733	727	596
Exploration			110	136	181
Depreciation, depletion and amortization			$ 1,753	$ 2,066	$ 2,316
Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration]			Impairments	Impairments	Impairments
Impairments			$ 7	$ 60	$ 144
Taxes other than income			484	345	200
General and administrative			308	291	274
Net interest and other			188	188	256
Other net periodic benefit costs (credits)			16	5	(1)
Loss on early extinguishment of debt			0	121	28
Income tax provision (benefit)			167	58	(14)
Net income (loss)			3,612	946	(1,451)
Total assets			19,940	16,994	17,956
Capital expenditures			1,480	1,032	1,151
Valuation allowance released	$ 685		685
Long-lived assets held for use impairment			0	30	49
Loss on lease termination				13
Severance costs				12	17
Goodwill, impairment loss		$ 95	0	0	95
Pension Benefits
Segment Reporting Information [Line Items]
Other net periodic benefit costs (credits)					(30)
Net curtailment gain					17
Interest Rate Contract, Maturing November 1, 2022 | Not Designated as Hedges
Segment Reporting Information [Line Items]
Gain on interest rate swap				28
Interest Rate Contract, Maturing June 1, 2025 | Not Designated as Hedges
Segment Reporting Information [Line Items]
Gain on interest rate swap				27
Interest Rate Contract, Maturing June 1, 2025 | Cash Flow Hedges
Segment Reporting Information [Line Items]
Gain on interest rate swap			17
Permian
Segment Reporting Information [Line Items]
Exploration				28
Long-lived assets held for use impairment				5
Gulf Of Mexico
Segment Reporting Information [Line Items]
Asset retirement costs of long-lived assets, impairment				30
Impairments				30
Dry Well Costs and Unproved Property Impairments | LOUISIANA
Segment Reporting Information [Line Items]
Exploration			48
Dry Well Costs and Unproved Property Impairments | Permian
Segment Reporting Information [Line Items]
Exploration			25
Unproved Property Impairments
Segment Reporting Information [Line Items]
Exploration				20
Oil And Gas Lease | Permian
Segment Reporting Information [Line Items]
Exploration				16
Central Facilities | Eagle Ford
Segment Reporting Information [Line Items]
Long-lived assets held for use impairment				24
Non-Producing Property | Gulf Of Mexico
Segment Reporting Information [Line Items]
Asset retirement costs of long-lived assets, impairment				30
Impairments				30
Unproved Acreage | Permian
Segment Reporting Information [Line Items]
Net gain (loss) on disposal of assets			39
Non-Core Conventional Assets
Segment Reporting Information [Line Items]
Net gain (loss) on disposal of assets				(20)
Equity method investment
Segment Reporting Information [Line Items]
Net gain (loss) on disposal of assets				(12)
Well Bore Assignments
Segment Reporting Information [Line Items]
Net gain (loss) on disposal of assets				8
U.S.
Segment Reporting Information [Line Items]
Revenues from contracts with customers			7,268	5,334	2,924
U.S. | Permian
Segment Reporting Information [Line Items]
Revenues from contracts with customers			588	416	242
U.S. | Eagle Ford
Segment Reporting Information [Line Items]
Revenues from contracts with customers			2,382	1,763	996
Operating Segments | U.S.
Segment Reporting Information [Line Items]
Revenues from contracts with customers			7,268	5,334	2,924
Net gain (loss) on commodity derivatives			(132)	(399)	143
Income (loss) from equity method investments			0	0	0
Net gain (loss) on disposal of assets			0	0	0
Other income			19	7	15
Production			625	480	494
Shipping, handling and other operating			665	686	534
Exploration			36	65	97
Depreciation, depletion and amortization			1,675	1,972	2,211
Impairments			0	0	0
Taxes other than income			475	346	193
General and administrative			131	107	115
Net interest and other			0	0	0
Other net periodic benefit costs (credits)			0	0	0
Loss on early extinguishment of debt				0	0
Income tax provision (benefit)			808	9	(9)
Net income (loss)			2,740	1,277	(553)
Total assets			18,429	15,339	16,063
Capital expenditures			1,463	1,018	1,137
Operating Segments | Int’l
Segment Reporting Information [Line Items]
Revenues from contracts with customers			272	267	173
Net gain (loss) on commodity derivatives			0	0	0
Income (loss) from equity method investments			613	253	10
Net gain (loss) on disposal of assets			0	0	0
Other income			7	4	7
Production			65	54	59
Shipping, handling and other operating			18	16	8
Exploration			0	0	0
Depreciation, depletion and amortization			60	68	82
Impairments			0	0	0
Taxes other than income			0	0	0
General and administrative			13	13	14
Net interest and other			0	0	0
Other net periodic benefit costs (credits)			0	0	0
Loss on early extinguishment of debt				0	0
Income tax provision (benefit)			151	56	(3)
Net income (loss)			585	317	30
Total assets			1,157	994	1,081
Capital expenditures			2	0	1
Not Allocated to Segments
Segment Reporting Information [Line Items]
Revenues from contracts with customers			0	0	0
Net gain (loss) on commodity derivatives			18	16	(27)
Income (loss) from equity method investments			0	0	(171)
Net gain (loss) on disposal of assets			(38)	(19)	9
Other income			9	4	3
Production			0	0	2
Shipping, handling and other operating			50	25	54
Exploration			74	71	84
Depreciation, depletion and amortization			18	26	23
Impairments			7	60	144
Taxes other than income			9	(1)	7
General and administrative			164	171	145
Net interest and other			188	188	256
Other net periodic benefit costs (credits)			16	5	(1)
Loss on early extinguishment of debt				121	28
Income tax provision (benefit)			(792)	(7)	(2)
Net income (loss)			287	(648)	(928)
Total assets			354	661	812
Capital expenditures			$ 15	$ 14	$ 13