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Consolidated Statement of Cash Flows - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Operating Activities      
Net Income (Loss) $ (5,561) $ 2,845 $ 14,860
Adjustments      
Depreciation, depletion and amortization 19,508 29,218 19,419
Dry hole expense 1,036 172 687
Distributions more (less) than income from equity affiliates 2,015 (2,073) (3,580)
Net before-tax gains on asset retirements and sales (760) (1,367) (619)
Net foreign currency effects 619 272 123
Deferred income tax provision (3,604) (1,966) 1,050
Net decrease (increase) in operating working capital (1,652) 1,494 (718)
Decrease (increase) in long-term receivables 296 502 418
Net decrease (increase) in other deferred charges (248) (69) 0
Cash contributions to employee pension plans (1,213) (1,362) (1,035)
Other 141 (352) 13
Net Cash Provided by Operating Activities 10,577 27,314 30,618
Investing Activities      
Cash acquired from Noble Energy, Inc. 373 0 0
Capital expenditures (8,922) (14,116) (13,792)
Proceeds and deposits related to asset sales and returns of investment 2,968 2,951 2,392
Net maturities of (investments in) time deposits 0 950 (950)
Net sales (purchases) of marketable securities 35 2 (51)
Net repayment (borrowing) of loans by equity affiliates (1,419) (1,245) 111
Net Cash Used for Investing Activities (6,965) (11,458) (12,290)
Financing Activities      
Net borrowings (repayments) of short-term obligations 651 (2,821) 2,021
Proceeds from issuances of long-term debt 12,308 0 218
Repayments of long-term debt and other financing obligations (5,489) (5,025) (6,741)
Cash dividends - common stock (9,651) (8,959) (8,502)
Distributions to noncontrolling interests (24) (18) (91)
Net sales (purchases) of treasury shares (1,531) (2,935) (604)
Net Cash Provided by (Used for) Financing Activities (3,736) (19,758) (13,699)
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash (50) 332 (91)
Net Change in Cash, Cash Equivalents and Restricted Cash (174) (3,570) 4,538
Cash, Cash Equivalents and Restricted Cash at January 1 6,911 10,481 5,943
Cash, Cash Equivalents and Restricted Cash at December 31 $ 6,737 $ 6,911 $ 10,481