Information Relating to the Consolidated Statement of Cash Flows - Summary of Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Distributions more (less) than income from equity affiliates included the following:
Distributions from equity affiliates	$ 1,476	$ 1,386
(Income) loss from equity affiliates	(2,828)	(4,552)
Distributions more (less) than income from equity affiliates	(1,352)	(3,166)
Net decrease (increase) in operating working capital was composed of the following:
Decrease (increase) in accounts and notes receivable	1,205	(8,625)
Decrease (increase) in inventories	(951)	(789)
Decrease (increase) in prepaid expenses and other current assets	(1,406)	(479)
Increase (decrease) in accounts payable and accrued liabilities	(531)	8,219
Increase (decrease) in income and other taxes payable	(3,265)	1,269
Net decrease (increase) in operating working capital	(4,948)	(405)
Net cash provided by operating activities included the following cash payments:
Interest on debt (net of capitalized interest)	232	262
Income taxes	6,616	4,414
Proceeds and deposits related to asset sales and returns of investment consisted of the following gross amounts:
Proceeds and deposits related to asset sales	171	1,263
Returns of investment from equity affiliates	153	1,086
Proceeds and deposits related to asset sales and returns of investment	324	2,349
Net sales (purchases) of marketable securities consisted of the following gross amounts:
Marketable securities purchased	(287)	(7)
Marketable securities sold	196	6
Net sales (purchases) of marketable securities	(91)	(1)
Net repayment (borrowing) of loans by equity affiliates consisted of the following gross amounts:
Borrowing of loans by equity affiliates	(222)	(20)
Repayment of loans by equity affiliates	33	49
Net repayment (borrowing) of loans by equity affiliates	(189)	29
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	(104)	36
Net borrowings (repayments) of short-term obligations	(104)	36
Net contributions from (distributions to) noncontrolling interests consisted of the following gross amounts:
Distributions to noncontrolling interests	(9)	(36)
Contributions from noncontrolling interests	6	0
Net contributions from (distributions to) noncontrolling interests	(3)	(36)
Net sales (purchases) of treasury shares consisted of the following gross and net amounts:
Shares issued for share-based compensation plans	181	5,452
Shares purchased under share repurchase and deferred compensation plans	(8,128)	(3,755)
Net sales (purchases) of treasury shares	(7,947)	1,697
Capital expenditures
Additions to properties, plant and equipment	6,571	4,028
Additions to investments	166	831
Current-year dry hole expenditures	58	116
Payments for other assets and liabilities, net	0	169
Capital expenditures	$ 6,795	$ 5,144