Information Relating to the Consolidated Statement of Cash Flows - Summary of Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Distributions more (less) than income from equity affiliates included the following:
Distributions from equity affiliates	$ 736	$ 687
(Income) loss from equity affiliates	(1,441)	(1,588)
Distributions more (less) than income from equity affiliates	(705)	(901)
Net decrease (increase) in operating working capital was composed of the following:
Decrease (increase) in accounts and notes receivable	(606)	1,458
Decrease (increase) in inventories	(1,330)	(985)
Decrease (increase) in prepaid expenses and other current assets	255	(822)
Increase (decrease) in accounts payable and accrued liabilities	538	(1,849)
Increase (decrease) in income and other taxes payable	(1)	383
Net decrease (increase) in operating working capital	(1,144)	(1,815)
Net cash provided by operating activities included the following cash payments:
Interest on debt (net of capitalized interest)	56	53
Income taxes	1,428	1,830
Proceeds and deposits related to asset sales and returns of investment consisted of the following gross amounts:
Proceeds and deposits related to asset sales	52	131
Returns of investment from equity affiliates	52	88
Proceeds and deposits related to asset sales and returns of investment	104	219
Net sales (purchases) of marketable securities consisted of the following gross amounts:
Marketable securities purchased	0	0
Marketable securities sold	45	95
Net sales (purchases) of marketable securities	45	95
Net repayment (borrowing) of loans by equity affiliates consisted of the following gross amounts:
Borrowing of loans by equity affiliates	(46)	(103)
Repayment of loans by equity affiliates	30	20
Net repayment (borrowing) of loans by equity affiliates	(16)	(83)
Net borrowings (repayments) of short-term obligations consisted of the following gross and net amounts:
Proceeds from issuances of short-term debt obligations	0	0
Repayments of short-term debt obligations	0	0
Net borrowings (repayments) of short-term debt obligations with three months or less maturity	1,836	(87)
Net borrowings (repayments) of short-term obligations	1,836	(87)
Net contributions from (distributions to) noncontrolling interests consisted of the following gross amounts:
Distributions to noncontrolling interests	(3)	(9)
Contributions from noncontrolling interests	7	0
Net contributions from (distributions to) noncontrolling interests	4	(9)
Net sales (purchases) of treasury shares consisted of the following gross and net amounts:
Shares issued for share-based compensation plans	87	146
Shares purchased under share repurchase and deferred compensation plans	(2,978)	(3,753)
Net sales (purchases) of treasury shares	(2,891)	(3,607)
Capital expenditures
Additions to properties, plant and equipment	3,864	2,907
Additions to investments	199	111
Current-year dry hole expenditures	28	20
Payments for other assets and liabilities, net	(2)	0
Capital expenditures	$ 4,089	$ 3,038