Information Relating to the Consolidated Statement of Cash Flows - Summary of Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Distributions more (less) than income from equity affiliates included the following:
Distributions from equity affiliates	$ 2,019	$ 1,476
(Income) loss from equity affiliates	(2,647)	(2,828)
Distributions more (less) than income from equity affiliates	(628)	(1,352)
Net decrease (increase) in operating working capital was composed of the following:
Decrease (increase) in accounts and notes receivable	(928)	1,205
Decrease (increase) in inventories	(1,865)	(951)
Decrease (increase) in prepaid expenses and other current assets	44	(1,406)
Increase (decrease) in accounts payable and accrued liabilities	419	(531)
Increase (decrease) in income and other taxes payable	(1,245)	(3,265)
Net decrease (increase) in operating working capital	(3,575)	(4,948)
Net cash provided by operating activities included the following cash payments:
Interest on debt (net of capitalized interest)	238	232
Income taxes	4,738	6,616
Proceeds and deposits related to asset sales and returns of investment consisted of the following gross amounts:
Proceeds and deposits related to asset sales	103	171
Returns of investment from equity affiliates	115	153
Proceeds and deposits related to asset sales and returns of investment	218	324
Net sales (purchases) of marketable securities consisted of the following gross amounts:
Marketable securities purchased	0	(287)
Marketable securities sold	45	196
Net sales (purchases) of marketable securities	45	(91)
Net repayment (borrowing) of loans by equity affiliates consisted of the following gross amounts:
Borrowing of loans by equity affiliates	(154)	(222)
Repayment of loans by equity affiliates	36	33
Net repayment (borrowing) of loans by equity affiliates	(118)	(189)
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	3,119	(104)
Net borrowings (repayments) of short-term obligations	3,119	(104)
Net contributions from (distributions to) noncontrolling interests consisted of the following gross amounts:
Distributions to noncontrolling interests	(7)	(9)
Contributions from noncontrolling interests	9	6
Net contributions from (distributions to) noncontrolling interests	2	(3)
Net sales (purchases) of treasury shares consisted of the following gross and net amounts:
Shares issued for share-based compensation plans	158	181
Shares purchased under share repurchase and deferred compensation plans	(5,979)	(8,128)
Net sales (purchases) of treasury shares	(5,821)	(7,947)
Capital expenditures
Additions to properties, plant and equipment	7,678	6,571
Additions to investments	265	166
Current-year dry hole expenditures	112	58
Payments for other assets and liabilities, net	0	0
Capital expenditures	$ 8,055	$ 6,795