Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash Flows from Operating Activities
Net Income (Loss)		$ 4,664	$ (605)	$ 2,735
Items Not Requiring (Providing) Cash
Depreciation, Depletion and Amortization		3,651	3,400	3,750
Impairments		376	2,100	518
Stock-Based Compensation Expenses		152	146	175
Deferred Income Taxes		(122)	(186)	632
(Gains) Losses on Asset Dispositions, Net		(17)	47	(124)
Other, Net		13	12	4
Dry Hole Costs	[1]	71	13	28
Mark-to-Market Commodity Derivative Contracts
Total (Gains) Losses		1,152	(1,145)	(180)
Net Cash Received from (Payments for) Settlements of Commodity Derivative Contracts		(638)	1,071	231
Other, Net		7	1	1
Changes in Components of Working Capital and Other Assets and Liabilities
Accounts Receivable		(821)	467	(92)
Inventories		(13)	123	90
Accounts Payable		456	(795)	169
Accrued Taxes Payable		312	(49)	40
Other Assets		(136)	325	358
Other Liabilities		(116)	8	(57)
Changes in Components of Working Capital Associated with Investing Activities		(200)	75	(115)
Net Cash Provided by Operating Activities		8,791	5,008	8,163
Investing Cash Flows
Additions to Oil and Gas Properties		(3,638)	(3,244)	(6,152)
Additions to Other Property, Plant and Equipment		(212)	(221)	(270)
Proceeds from Sales of Assets		231	192	140
Other Investing Activities		0	0	(10)
Changes in Components of Working Capital Associated with Investing Activities		200	(75)	115
Net Cash Used in Investing Activities		(3,419)	(3,348)	(6,177)
Financing Cash Flows
Long-Term Debt Borrowings		0	1,484	0
Long-Term Debt Repayments		(750)	(1,000)	(900)
Dividends Paid		(2,684)	(821)	(588)
Treasury Stock Purchased		(41)	(16)	(25)
Proceeds from Stock Options Exercised and Employee Stock Purchase Plan		19	16	18
Debt Issuance Costs		0	(3)	(5)
Repayment of Finance Lease Liabilities		(37)	(19)	(13)
Net Cash Used in Financing Activities		(3,493)	(359)	(1,513)
Effect of Exchange Rate Changes on Cash		1	0	(1)
Increase in Cash and Cash Equivalents		1,880	1,301	472
Cash and Cash Equivalents at Beginning of Year		3,329	2,028	1,556
Cash and Cash Equivalents at End of Year		$ 5,209	$ 3,329	$ 2,028

[1] Excludes gains or losses on the mark-to-market of financial commodity derivative contracts, gains or losses on sales of reserves and related assets, interest charges and general corporate expenses for each of the three years in the period ended December 31, 2021.