Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating Revenues and Other
Total	$ 4,765,000,000	$ 2,246,000,000	$ 12,598,000,000	$ 8,067,000,000
Operating Expenses
Lease and Well	270,000,000	227,000,000	810,000,000	802,000,000
Transportation Costs	219,000,000	180,000,000	635,000,000	540,000,000
Gathering and Processing Costs	145,000,000	115,000,000	412,000,000	340,000,000
Exploration Costs	44,000,000	38,000,000	112,000,000	105,000,000
Dry Hole Costs	4,000,000	13,000,000	28,000,000	13,000,000
Impairments	82,000,000	79,000,000	170,000,000	1,957,000,000
Marketing Costs	1,184,000,000	523,000,000	3,013,000,000	2,077,000,000
Depreciation, Depletion and Amortization	927,000,000	823,000,000	2,741,000,000	2,530,000,000
General and Administrative	142,000,000	125,000,000	372,000,000	371,000,000
Taxes Other Than Income	277,000,000	126,000,000	731,000,000	364,000,000
Total	3,294,000,000	2,249,000,000	9,024,000,000	9,099,000,000
Operating Income (Loss)	1,471,000,000	(3,000,000)	3,574,000,000	(1,032,000,000)
Other Income, Net	6,000,000	3,000,000	0	17,000,000
Income (Loss) Before Interest Expense and Income Taxes	1,477,000,000	0	3,574,000,000	(1,015,000,000)
Interest Expense
Interest Expense, Net	48,000,000	53,000,000	140,000,000	152,000,000
Income (Loss) Before Income Taxes	1,429,000,000	(53,000,000)	3,434,000,000	(1,167,000,000)
Income Tax Provision (Benefit)	334,000,000	(11,000,000)	755,000,000	(225,000,000)
Net Income (Loss)	$ 1,095,000,000	$ (42,000,000)	$ 2,679,000,000	$ (942,000,000)
Net Income (Loss) Per Share
Basic	$ 1.88	$ (0.07)	$ 4.62	$ (1.63)
Diluted	$ 1.88	$ (0.07)	$ 4.59	$ (1.63)
Average Number of Common Shares
Basic	581,000	579,000	580,000	579,000
Diluted	584,000	579,000	584,000	579,000
Other Comprehensive Income (Loss)
Foreign Currency Translation Adjustments	$ 2,000,000	$ (3,000,000)	$ (1,000,000)	$ (3,000,000)
Other, Net of Tax	0	0	0	0
Other Comprehensive Income (Loss)	2,000,000	(3,000,000)	(1,000,000)	(3,000,000)
Comprehensive Income (Loss)	1,097,000,000	(45,000,000)	2,678,000,000	(945,000,000)
Crude Oil and Condensate
Operating Revenues and Other
Revenues	2,929,000,000	1,395,000,000	7,879,000,000	4,075,000,000
Natural Gas Liquids
Operating Revenues and Other
Revenues	548,000,000	185,000,000	1,229,000,000	439,000,000
Natural Gas
Operating Revenues and Other
Revenues	568,000,000	184,000,000	1,597,000,000	535,000,000
Gains (Losses) on Mark-to-Market Commodity Derivative Contracts
Operating Revenues and Other
Revenues	(494,000,000)	(4,000,000)	(1,288,000,000)	1,075,000,000
Gathering, Processing and Marketing
Operating Revenues and Other
Revenues	1,186,000,000	539,000,000	3,056,000,000	1,940,000,000
Gains (Losses) on Asset Dispositions, Net
Operating Revenues and Other
Revenues	1,000,000	(71,000,000)	46,000,000	(41,000,000)
Other, Net
Operating Revenues and Other
Revenues	$ 27,000,000	$ 18,000,000	$ 79,000,000	$ 44,000,000