Business Segment Information - Schedule of Selected Financial Information by Reportable Segment (Details) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2021 USD ($)	Dec. 31, 2023 USD ($) purchaser	Dec. 31, 2022 USD ($) purchaser	Dec. 31, 2021 USD ($) purchaser
Schedule of Segment Reporting Information By Segment [Abstract]
Gains on Asset Dispositions, Net		$ 95	$ 74	$ 17
Operating Revenues and Other		24,186	25,702	18,642
Depreciation, Depletion and Amortization		3,492	3,542	3,651
Operating Income (Loss)		9,603	9,966	6,102
Interest Income		240	85	3
Other Income (Expense)		(6)	29	6
Interest Expense, Net		148	179	178
Income Before Income Taxes		9,689	9,901	5,933
Income Tax Provision		2,095	2,142	1,269
Additions to Oil and Gas Properties, Excluding Dry Hole Costs		5,579	4,727	3,617
Total Property, Plant and Equipment, Net		32,297	29,429	28,426
Total Assets		$ 43,857	$ 41,371	$ 38,236
Number of significant purchaser | purchaser		3	3	2
First sale with significant purchaser | purchaser		1	1	1
Sales made with second significant purchaser | purchaser		2	1
Sales made with third significant purchaser | purchaser			1	1
Dry hole costs		$ 1	$ 45	$ 71
Crude Oil and Condensate
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer		13,748	16,367	11,125
Natural Gas Liquids
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer		1,884	2,648	1,812
Natural Gas
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer		1,744	3,781	2,444
Gains (Losses) on Mark-to-Market Financial Commodity Derivative Contracts, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer		818	(3,982)	(1,152)
Gathering, Processing and Marketing
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer		5,806	6,696	4,288
Other, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer		91	118	108
United States
Schedule of Segment Reporting Information By Segment [Abstract]
Gains on Asset Dispositions, Net		53	77	(40)
Operating Revenues and Other		23,916	25,394	18,265
Depreciation, Depletion and Amortization		3,414	3,469	3,558
Operating Income (Loss)		9,516	9,880	6,013
Interest Income		223	81	3
Other Income (Expense)		(6)	(17)	(14)
Interest Expense, Net		148	179	178
Income Before Income Taxes		9,585	9,765	5,824
Income Tax Provision		2,093	2,106	1,247
Additions to Oil and Gas Properties, Excluding Dry Hole Costs		5,413	4,599	3,557
Total Property, Plant and Equipment, Net		31,876	29,109	28,213
Total Assets		42,674	40,349	37,436
Amount of sales with a single significant purchaser in the United States segment		3,300	3,300	2,700
Amount of sales with a second significant purchaser in the United States segment.		2,600	3,100	2,600
Amount of sales with a third significant purchaser in the United States segment.		2,600	3,000
United States | Crude Oil and Condensate
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer		13,734	16,349	11,094
United States | Natural Gas Liquids
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer		1,884	2,648	1,812
United States | Natural Gas
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer		1,530	3,489	2,156
United States | Gains (Losses) on Mark-to-Market Financial Commodity Derivative Contracts, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer		818	(3,982)	(1,152)
United States | Gathering, Processing and Marketing
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer		5,806	6,695	4,287
United States | Other, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer		91	118	108
Trinidad
Schedule of Segment Reporting Information By Segment [Abstract]
Gains on Asset Dispositions, Net		42	(4)	(2)
Operating Revenues and Other		270	307	300
Depreciation, Depletion and Amortization		78	73	87
Operating Income (Loss)		124	122	151
Interest Income		12	2	0
Other Income (Expense)		1	46	8
Interest Expense, Net		0	0	0
Income Before Income Taxes		137	170	159
Income Tax Provision		2	35	66
Additions to Oil and Gas Properties, Excluding Dry Hole Costs		162	122	55
Total Property, Plant and Equipment, Net		404	307	204
Total Assets		1,063	879	637
Trinidad | Crude Oil and Condensate
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer		14	18	31
Trinidad | Natural Gas Liquids
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer		0	0	0
Trinidad | Natural Gas
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer		214	292	270
Trinidad | Gains (Losses) on Mark-to-Market Financial Commodity Derivative Contracts, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer		0	0	0
Trinidad | Gathering, Processing and Marketing
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer		0	1	1
Trinidad | Other, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer		0	0	0
Other International
Schedule of Segment Reporting Information By Segment [Abstract]
Gains on Asset Dispositions, Net	$ 58	0	1	59
Operating Revenues and Other		0	1	77
Depreciation, Depletion and Amortization		0	0	6
Operating Income (Loss)		(37)	(36)	(62)
Interest Income		5	2	0
Other Income (Expense)		(1)	0	12
Interest Expense, Net		0	0	0
Income Before Income Taxes		(33)	(34)	(50)
Income Tax Provision		0	1	(44)
Additions to Oil and Gas Properties, Excluding Dry Hole Costs		4	6	5
Total Property, Plant and Equipment, Net		17	13	9
Total Assets		120	143	163
Pretax impairment charges		18	15	45
Dry hole costs				42
Other International | Crude Oil and Condensate
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer		0	0	0
Other International | Natural Gas Liquids
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer		0	0	0
Other International | Natural Gas
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer		0	0	18
Other International | Gains (Losses) on Mark-to-Market Financial Commodity Derivative Contracts, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer		0	0	0
Other International | Gathering, Processing and Marketing
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer		0	0	0
Other International | Other, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer		$ 0	$ 0	$ 0