Information Relating to the Consolidated Statement of Cash Flows - Summary of Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Distributions more (less) than income from equity affiliates includes the following:
Distributions from equity affiliates	$ 2,194	$ 1,838
(Income) loss from equity affiliates	(6,962)	(4,000)
Distributions more (less) than income from equity affiliates	(4,768)	(2,162)
Net decrease (increase) in operating working capital was composed of the following:
Decrease (increase) in accounts and notes receivable	(4,428)	(5,692)
Decrease (increase) in inventories	(2,170)	(353)
Decrease (increase) in prepaid expenses and other current assets	(479)	(94)
Increase (decrease) in accounts payable and accrued liabilities	5,282	3,842
Increase (decrease) in income and other taxes payable	2,967	838
Net decrease (increase) in operating working capital	1,172	(1,459)
Net cash provided by operating activities includes the following cash payments:
Interest on debt (net of capitalized interest)	320	427
Income taxes	6,750	2,943
Proceeds and deposits related to asset sales and returns of investment consisted of the following gross amounts:
Proceeds and deposits related to asset sales	1,406	563
Returns of investment from equity affiliates	1,079	23
Proceeds and deposits related to asset sales and returns of investment	2,485	586
Net sales (purchases) of marketable securities consisted of the following gross amounts:
Marketable securities purchased	(9)	(3)
Marketable securities sold	91	2
Net sales (purchases) of marketable securities	82	(1)
Net repayment (borrowing) of loans by equity affiliates:
Borrowing of loans by equity affiliates	(27)	0
Repayment of loans by equity affiliates	65	389
Net repayment (borrowing) of loans by equity affiliates	38	389
Net borrowings (repayments) of short-term obligations consisted of the following gross and net amounts:
Proceeds from issuances of short-term obligations	0	4,449
Repayments of short-term obligations	0	(6,225)
Net borrowings (repayments) of short-term obligations with three months or less maturity	278	(1,851)
Net borrowings (repayments) of short-term obligations	278	(3,627)
Net sales (purchases) of treasury shares consists of the following gross and net amounts:
Shares issued for share-based compensation plans	5,505	388
Shares purchased under share repurchase and deferred compensation plans	(7,505)	(633)
Net sales (purchases) of treasury shares	(2,000)	(245)
Net contributions from (distributions to) noncontrolling interests consisted of the following gross amounts:
Distributions to noncontrolling interests	(107)	(51)
Contributions from noncontrolling interests	4	17
Net contributions from (distributions to) noncontrolling interests	(103)	(34)
Capital expenditures
Additions to properties, plant and equipment	6,901	5,087
Additions to investments	932	309
Current-year dry hole expenditures	137	55
Payments for other assets and liabilities, net	169	(1)
Capital expenditures	$ 8,139	$ 5,450