Business Segment Information - Schedule of Selected Financial Information by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Schedule of Segment Reporting Information By Segment [Abstract]
Gains (Losses) on Asset Dispositions, Net	$ 58	$ 0	$ 89	$ (1)
Total	8,620	5,478	15,541	11,147
Lease and Well	467	396	929	797
Gathering, Processing and Transportation Costs	676	455	1,330	895
Marketing Costs	1,950	1,216	3,334	2,541
Depreciation, Depletion and Amortization	1,259	1,053	2,452	2,066
General and Administrative	213	186	398	357
Taxes Other Than Income	431	301	769	642
Operating Income (Loss)	3,528	1,747	6,126	3,606
Interest Income	35	56	66	124
Other Income (Expense)	3	(1)	(5)	(4)
Interest Expense, Net	67	51	133	98
Income Before Income Taxes	3,499	1,751	6,054	3,628
Additions to Oil and Gas Properties, Excluding Dry Hole Costs	1,663	1,690	3,183	3,046
Total Property, Plant and Equipment, Net	43,240	35,361	43,240	35,361	$ 42,341
Total Assets	54,783	46,284	54,783	46,284	$ 51,799
Crude Oil and Condensate
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	4,901	2,974	8,478	6,267
Natural Gas Liquids
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	770	534	1,434	1,106
Natural Gas
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	812	600	1,833	1,237
Gains (Losses) on Mark-to-Market Financial Commodity and Other Derivative Contracts, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer	40	107	153	(84)
Gathering, Processing and Marketing
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	2,011	1,247	3,507	2,587
Other, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer	28	16	47	35
United States
Schedule of Segment Reporting Information By Segment [Abstract]
Gains (Losses) on Asset Dispositions, Net	55	(3)	86	0
Total	8,482	5,385	15,300	10,968
Lease and Well	449	383	895	768
Gathering, Processing and Transportation Costs	671	454	1,324	894
Marketing Costs	1,950	1,216	3,334	2,541
Depreciation, Depletion and Amortization	1,205	1,016	2,357	1,979
General and Administrative	203	178	378	340
Taxes Other Than Income	425	300	760	640
Other Segment Items	90	79	186	161
Operating Income (Loss)	3,489	1,759	6,066	3,645
Interest Income	31	52	59	116
Interest Expense, Net	67	51	133	98
Additions to Oil and Gas Properties, Excluding Dry Hole Costs	1,611	1,626	3,042	2,984
Total Property, Plant and Equipment, Net	42,535	34,850	42,535	34,850
Total Assets	53,149	44,921	53,149	44,921
United States | Crude Oil and Condensate
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	4,881	2,969	8,445	6,255
United States | Natural Gas Liquids
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	770	534	1,434	1,106
United States | Natural Gas
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	702	516	1,636	1,070
United States | Gains (Losses) on Mark-to-Market Financial Commodity and Other Derivative Contracts, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer	40	107	153	(84)
United States | Gathering, Processing and Marketing
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	2,006	1,246	3,499	2,586
United States | Other, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer	28	16	47	35
Trinidad
Schedule of Segment Reporting Information By Segment [Abstract]
Gains (Losses) on Asset Dispositions, Net	0	0	0	0
Total	127	90	226	180
Lease and Well	12	10	22	24
Gathering, Processing and Transportation Costs	1	1	2	1
Marketing Costs	0	0	0	0
Depreciation, Depletion and Amortization	53	37	94	87
General and Administrative	5	4	8	8
Taxes Other Than Income	5	1	7	2
Other Segment Items	2	7	4	40
Operating Income (Loss)	49	30	89	18
Interest Income	2	2	4	5
Interest Expense, Net	0	0	0	0
Additions to Oil and Gas Properties, Excluding Dry Hole Costs	19	61	59	59
Total Property, Plant and Equipment, Net	511	483	511	483
Total Assets	1,221	1,169	1,221	1,169
Trinidad | Crude Oil and Condensate
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	16	5	28	12
Trinidad | Natural Gas Liquids
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	0	0	0	0
Trinidad | Natural Gas
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	106	84	190	167
Trinidad | Gains (Losses) on Mark-to-Market Financial Commodity and Other Derivative Contracts, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer	0	0	0	0
Trinidad | Gathering, Processing and Marketing
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	5	1	8	1
Trinidad | Other, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer	0	0	0	0
Other International
Schedule of Segment Reporting Information By Segment [Abstract]
Gains (Losses) on Asset Dispositions, Net	3	3	3	(1)
Total	11	3	15	(1)
Lease and Well	6	3	12	5
Gathering, Processing and Transportation Costs	4	0	4	0
Marketing Costs	0	0	0	0
Depreciation, Depletion and Amortization	1	0	1	0
General and Administrative	5	4	12	9
Taxes Other Than Income	1	0	2	0
Other Segment Items	4	38	13	42
Operating Income (Loss)	(10)	(42)	(29)	(57)
Interest Income	2	2	3	3
Interest Expense, Net	0	0	0	0
Additions to Oil and Gas Properties, Excluding Dry Hole Costs	33	3	82	3
Total Property, Plant and Equipment, Net	194	28	194	28
Total Assets	413	194	413	194
Other International | Crude Oil and Condensate
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	4	0	5	0
Other International | Natural Gas Liquids
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	0	0	0	0
Other International | Natural Gas
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue from contract with customer	4	0	7	0
Other International | Gains (Losses) on Mark-to-Market Financial Commodity and Other Derivative Contracts, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer	0	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	0
Other International | Other, Net
Schedule of Segment Reporting Information By Segment [Abstract]
Revenue not from contract with customer	$ 0	$ 0	$ 0	$ 0