Segment Information - Schedule of Selected Financial Information by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Selected Information [Line Items]
Gains (Losses) on Asset Dispositions, Net	$ (1)	$ 26
Operating Revenues and Other	5,669	6,123
Lease and Well	401	396
Gathering, Processing and Transportation Costs	440	413
Marketing Costs	1,325	1,404
Depreciation, Depletion and Amortization	1,013	1,074
General and Administrative	171	162
Taxes Other Than Income	341	338
Operating Income (Loss)	1,859	2,271
Interest Income	68	68
Other Expense	(3)	(6)
Interest Expense, Net	47	33
Income Before Income Taxes	1,877	2,300
Additions to Oil and Gas Properties, Excluding Dry Hole Costs	1,356	1,535
Total Property, Plant and Equipment, Net	34,632	33,077	$ 34,212
Total Assets	46,982	44,796	$ 47,186
Crude Oil and Condensate
Selected Information [Line Items]
Revenue from contract with customer	3,293	3,480
Natural Gas Liquids
Selected Information [Line Items]
Revenue from contract with customer	572	513
Natural Gas
Selected Information [Line Items]
Revenue from contract with customer	637	382
Gains (Losses) On Mark-To-Market Commodity Derivative Contracts and Other Derivative Contracts, Net
Selected Information [Line Items]
Revenue not from contract with customer	(191)	237
Gathering, Processing and Marketing
Selected Information [Line Items]
Revenue from contract with customer	1,340	1,459
Other, Net
Selected Information [Line Items]
Revenue not from contract with customer	19	26
United States of America Segment
Selected Information [Line Items]
Gains (Losses) on Asset Dispositions, Net	3	32
Operating Revenues and Other	5,583	6,060
Lease and Well	385	386
Gathering, Processing and Transportation Costs	440	413
Marketing Costs	1,325	1,404
Depreciation, Depletion and Amortization	963	1,042
General and Administrative	162	157
Taxes Other Than Income	340	337
Other Segment Items	82	57
Operating Income (Loss)	1,886	2,264
Interest Income	64	62
Interest Expense, Net	47	33
Additions to Oil and Gas Properties, Excluding Dry Hole Costs	1,358	1,495
Total Property, Plant and Equipment, Net	34,156	32,646
Total Assets	45,652	43,573
United States of America Segment | Crude Oil and Condensate
Selected Information [Line Items]
Revenue from contract with customer	3,286	3,476
United States of America Segment | Natural Gas Liquids
Selected Information [Line Items]
Revenue from contract with customer	572	513
United States of America Segment | Natural Gas
Selected Information [Line Items]
Revenue from contract with customer	554	317
United States of America Segment | Gains (Losses) On Mark-To-Market Commodity Derivative Contracts and Other Derivative Contracts, Net
Selected Information [Line Items]
Revenue not from contract with customer	(191)	237
United States of America Segment | Gathering, Processing and Marketing
Selected Information [Line Items]
Revenue from contract with customer	1,340	1,459
United States of America Segment | Other, Net
Selected Information [Line Items]
Revenue not from contract with customer	19	26
Trinidad
Selected Information [Line Items]
Gains (Losses) on Asset Dispositions, Net	0	(6)
Operating Revenues and Other	90	63
Lease and Well	14	9
Gathering, Processing and Transportation Costs	0	0
Marketing Costs	0	0
Depreciation, Depletion and Amortization	50	32
General and Administrative	4	4
Taxes Other Than Income	1	1
Other Segment Items	33	1
Operating Income (Loss)	(12)	16
Interest Income	3	4
Interest Expense, Net	0	0
Additions to Oil and Gas Properties, Excluding Dry Hole Costs	(2)	39
Total Property, Plant and Equipment, Net	450	413
Total Assets	1,133	1,091
Trinidad | Crude Oil and Condensate
Selected Information [Line Items]
Revenue from contract with customer	7	4
Trinidad | Natural Gas Liquids
Selected Information [Line Items]
Revenue from contract with customer	0	0
Trinidad | Natural Gas
Selected Information [Line Items]
Revenue from contract with customer	83	65
Trinidad | Gains (Losses) On Mark-To-Market Commodity Derivative Contracts and Other Derivative Contracts, Net
Selected Information [Line Items]
Revenue not from contract with customer	0	0
Trinidad | Gathering, Processing and Marketing
Selected Information [Line Items]
Revenue from contract with customer	0	0
Trinidad | Other, Net
Selected Information [Line Items]
Revenue not from contract with customer	0	0
Other International
Selected Information [Line Items]
Gains (Losses) on Asset Dispositions, Net	(4)	0
Operating Revenues and Other	(4)	0
Lease and Well	2	1
Gathering, Processing and Transportation Costs	0	0
Marketing Costs	0	0
Depreciation, Depletion and Amortization	0	0
General and Administrative	5	1
Taxes Other Than Income	0	0
Other Segment Items	4	7
Operating Income (Loss)	(15)	(9)
Interest Income	1	2
Interest Expense, Net	0	0
Additions to Oil and Gas Properties, Excluding Dry Hole Costs	0	1
Total Property, Plant and Equipment, Net	26	18
Total Assets	197	132
Other International | Crude Oil and Condensate
Selected Information [Line Items]
Revenue from contract with customer	0	0
Other International | Natural Gas Liquids
Selected Information [Line Items]
Revenue from contract with customer	0	0
Other International | Natural Gas
Selected Information [Line Items]
Revenue from contract with customer	0	0
Other International | Gains (Losses) On Mark-To-Market Commodity Derivative Contracts and Other Derivative Contracts, Net
Selected Information [Line Items]
Revenue not from contract with customer	0	0
Other International | Gathering, Processing and Marketing
Selected Information [Line Items]
Revenue from contract with customer	0	0
Other International | Other, Net
Selected Information [Line Items]
Revenue not from contract with customer	$ 0	$ 0