Information Relating to the Consolidated Statement of Cash Flows - Summary of Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Distributions more (less) than income from equity affiliates included the following:
Distributions from equity affiliates	$ 687	$ 644
(Income) loss from equity affiliates	(1,588)	(2,085)
Distributions more (less) than income from equity affiliates	(901)	(1,441)
Net decrease (increase) in operating working capital was composed of the following:
Decrease (increase) in accounts and notes receivable	1,458	(5,289)
Decrease (increase) in inventories	(985)	(222)
Decrease (increase) in prepaid expenses and other current assets	(822)	137
Increase (decrease) in accounts payable and accrued liabilities	(1,849)	3,768
Increase (decrease) in income and other taxes payable	383	669
Net decrease (increase) in operating working capital	(1,815)	(937)
Net cash provided by operating activities includes the following cash payments:
Interest on debt (net of capitalized interest)	53	47
Income taxes	1,830	1,071
Proceeds and deposits related to asset sales and returns of investment consisted of the following gross amounts:
Proceeds and deposits related to asset sales	131	747
Returns of investment from equity affiliates	88	536
Proceeds and deposits related to asset sales and returns of investment	219	1,283
Net sales (purchases) of marketable securities consisted of the following gross amounts:
Marketable securities purchased	0	(2)
Marketable securities sold	95	2
Net sales (purchases) of marketable securities	95	0
Net repayment (borrowing) of loans by equity affiliates:
Borrowing of loans by equity affiliates	(103)	0
Repayment of loans by equity affiliates	20	12
Net repayment (borrowing) of loans by equity affiliates	(83)	12
Net borrowings (repayments) of short-term obligations consisted of the following gross and net amounts:
Proceeds from issuances of short-term obligations	0	0
Repayments of short-term obligations	0	0
Net borrowings (repayments) of short-term obligations with three months or less maturity	(87)	61
Net borrowings (repayments) of short-term obligations	(87)	61
Net sales (purchases) of treasury shares consisted of the following gross and net amounts:
Shares issued for share-based compensation plans	146	4,641
Shares purchased under share repurchase and deferred compensation plans	(3,753)	(1,255)
Net sales (purchases) of treasury shares	(3,607)	3,386
Net contributions from (distributions to) noncontrolling interests consisted of the following gross amounts:
Distributions to noncontrolling interests	(9)	(5)
Contributions from noncontrolling interests	0	0
Net contributions from (distributions to) noncontrolling interests	(9)	(5)
Capital expenditures
Additions to properties, plant and equipment	2,907	1,732
Additions to investments	111	158
Current-year dry hole expenditures	20	70
Payments for other assets and liabilities, net	0	0
Capital expenditures	$ 3,038	$ 1,960