Segment Information - Schedule of Selected Financial Information by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Selected Information [Line Items]
Gains (Losses) on Asset Dispositions, Net	$ 0	$ 20	$ (1)	$ 46
Operating Revenues and Other	5,478	6,025	11,147	12,148
Lease and Well	396	390	797	786
Gathering, Processing and Transportation Costs	455	423	895	836
Marketing Costs	1,216	1,490	2,541	2,894
Depreciation, Depletion and Amortization	1,053	984	2,066	2,058
General and Administrative	186	151	357	313
Taxes Other Than Income	301	337	642	675
Operating Income (Loss)	1,747	2,130	3,606	4,401
Interest Income	56	64	124	132
Other Income (Expense)	(1)	2	(4)	(4)
Interest Expense, Net	(51)	(36)	(98)	(69)
Income Before Income Taxes	1,751	2,160	3,628	4,460
Additions to Oil and Gas Properties, Excluding Dry Hole Costs	1,690	1,390	3,046	2,925
Total Property, Plant and Equipment, Net	35,361	33,644	35,361	33,644	$ 34,212
Total Assets	46,284	45,224	46,284	45,224	$ 47,186
Crude Oil and Condensate
Selected Information [Line Items]
Revenue from contract with customer	2,974	3,692	6,267	7,172
NGLs
Selected Information [Line Items]
Revenue from contract with customer	534	515	1,106	1,028
Natural Gas
Selected Information [Line Items]
Revenue from contract with customer	600	303	1,237	685
Gains (Losses) On Mark-To-Market Financial Commodity and Other Derivative Contracts, Net
Selected Information [Line Items]
Revenue not from contract with customer	107	(47)	(84)	190
Gathering, Processing and Marketing
Selected Information [Line Items]
Revenue from contract with customer	1,247	1,519	2,587	2,978
Other, Net
Selected Information [Line Items]
Revenue not from contract with customer	16	23	35	49
United States
Selected Information [Line Items]
Gains (Losses) on Asset Dispositions, Net	(3)	20	0	52
Operating Revenues and Other	5,385	5,956	10,968	12,016
Lease and Well	383	381	768	767
Gathering, Processing and Transportation Costs	454	423	894	836
Marketing Costs	1,216	1,490	2,541	2,894
Depreciation, Depletion and Amortization	1,016	949	1,979	1,991
General and Administrative	178	146	340	303
Taxes Other Than Income	300	337	640	674
Other Segment Items	79	83	161	140
Operating Income (Loss)	1,759	2,147	3,645	4,411
Interest Income	52	59	116	121
Interest Expense, Net	(51)	(36)	(98)	(69)
Additions to Oil and Gas Properties, Excluding Dry Hole Costs	1,626	1,348	2,984	2,843
Total Property, Plant and Equipment, Net	34,850	33,202	34,850	33,202
Total Assets	44,921	43,953	44,921	43,953
United States | Crude Oil and Condensate
Selected Information [Line Items]
Revenue from contract with customer	2,969	3,688	6,255	7,164
United States | NGLs
Selected Information [Line Items]
Revenue from contract with customer	534	515	1,106	1,028
United States | Natural Gas
Selected Information [Line Items]
Revenue from contract with customer	516	239	1,070	556
United States | Gains (Losses) On Mark-To-Market Financial Commodity and Other Derivative Contracts, Net
Selected Information [Line Items]
Revenue not from contract with customer	107	(47)	(84)	190
United States | Gathering, Processing and Marketing
Selected Information [Line Items]
Revenue from contract with customer	1,246	1,518	2,586	2,977
United States | Other, Net
Selected Information [Line Items]
Revenue not from contract with customer	16	23	35	49
Trinidad
Selected Information [Line Items]
Gains (Losses) on Asset Dispositions, Net	0	0	0	(6)
Operating Revenues and Other	90	69	180	132
Lease and Well	10	10	24	19
Gathering, Processing and Transportation Costs	1	0	1	0
Marketing Costs	0	0	0	0
Depreciation, Depletion and Amortization	37	34	87	66
General and Administrative	4	3	8	7
Taxes Other Than Income	1	0	2	1
Other Segment Items	7	6	40	7
Operating Income (Loss)	30	16	18	32
Interest Income	2	4	5	8
Interest Expense, Net	0	0	0	0
Additions to Oil and Gas Properties, Excluding Dry Hole Costs	61	42	59	81
Total Property, Plant and Equipment, Net	483	423	483	423
Total Assets	1,169	1,130	1,169	1,130
Trinidad | Crude Oil and Condensate
Selected Information [Line Items]
Revenue from contract with customer	5	4	12	8
Trinidad | NGLs
Selected Information [Line Items]
Revenue from contract with customer	0	0	0	0
Trinidad | Natural Gas
Selected Information [Line Items]
Revenue from contract with customer	84	64	167	129
Trinidad | Gains (Losses) On Mark-To-Market Financial Commodity and Other Derivative Contracts, Net
Selected Information [Line Items]
Revenue not from contract with customer	0	0	0	0
Trinidad | Gathering, Processing and Marketing
Selected Information [Line Items]
Revenue from contract with customer	1	1	1	1
Trinidad | Other, Net
Selected Information [Line Items]
Revenue not from contract with customer	0	0	0	0
Other International
Selected Information [Line Items]
Gains (Losses) on Asset Dispositions, Net	3	0	(1)	0
Operating Revenues and Other	3	0	(1)	0
Lease and Well	3	(1)	5	0
Gathering, Processing and Transportation Costs	0	0	0	0
Marketing Costs	0	0	0	0
Depreciation, Depletion and Amortization	0	1	0	1
General and Administrative	4	2	9	3
Taxes Other Than Income	0	0	0	0
Other Segment Items	38	31	42	38
Operating Income (Loss)	(42)	(33)	(57)	(42)
Interest Income	2	1	3	3
Interest Expense, Net	0	0	0	0
Additions to Oil and Gas Properties, Excluding Dry Hole Costs	3	0	3	1
Total Property, Plant and Equipment, Net	28	19	28	19
Total Assets	194	141	194	141
Other International | Crude Oil and Condensate
Selected Information [Line Items]
Revenue from contract with customer	0	0	0	0
Other International | NGLs
Selected Information [Line Items]
Revenue from contract with customer	0	0	0	0
Other International | Natural Gas
Selected Information [Line Items]
Revenue from contract with customer	0	0	0	0
Other International | Gains (Losses) On Mark-To-Market Financial Commodity and Other Derivative Contracts, Net
Selected Information [Line Items]
Revenue not from contract with customer	0	0	0	0
Other International | Gathering, Processing and Marketing
Selected Information [Line Items]
Revenue from contract with customer	0	0	0	0
Other International | Other, Net
Selected Information [Line Items]
Revenue not from contract with customer	$ 0	$ 0	$ 0	$ 0