Information Relating to the Consolidated Statement of Cash Flows - Summary of Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Distributions more (less) than income from equity affiliates includes the following:
Distributions from equity affiliates	$ 3,855	$ 3,659	$ 1,543
(Income) loss from equity affiliates	(8,585)	(5,657)	472
Distributions more (less) than income from equity affiliates	(4,730)	(1,998)	2,015
Net decrease (increase) in operating working capital was composed of the following:
Decrease (increase) in accounts and notes receivable	(2,317)	(7,548)	2,423
Decrease (increase) in inventories	(930)	(530)	284
Decrease (increase) in prepaid expenses and other current assets	(226)	19	(87)
Increase (decrease) in accounts payable and accrued liabilities	2,750	5,475	(3,576)
Increase (decrease) in income and other taxes payable	2,848	1,223	(696)
Net decrease (increase) in operating working capital	2,125	(1,361)	(1,652)
Net cash provided by operating activities includes the following cash payments:
Interest on debt (net of capitalized interest)	525	699	720
Income taxes	9,148	4,355	2,987
Proceeds and deposits related to asset sales and returns of investment consisted of the following gross amounts:
Proceeds and deposits related to asset sales	1,435	1,352	2,891
Returns of investment from equity affiliates	1,200	439	77
Proceeds and deposits related to asset sales and returns of investment	2,635	1,791	2,968
Net sales (purchases) of marketable securities consisted of the following gross amounts:
Marketable securities purchased	(7)	(4)	0
Marketable securities sold	124	3	35
Net sales (purchases) of marketable securities	117	(1)	35
Net repayment (borrowing) of loans by equity affiliates:
Borrowing of loans by equity affiliates	(108)	0	(3,925)
Repayment of loans by equity affiliates	84	401	2,506
Net repayment (borrowing) of loans by equity affiliates	(24)	401	(1,419)
Net borrowings (repayments) of short-term obligations consisted of the following gross and net amounts:
Proceeds from issuances of short-term obligations	0	4,448	10,846
Repayments of short-term obligations	0	(6,906)	(9,771)
Net borrowings (repayments) of short-term obligations with three months or less maturity	263	(3,114)	(424)
Net borrowings (repayments) of short-term obligations	263	(5,572)	651
Net sales (purchases) of treasury shares consists of the following gross and net amounts:
Shares issued for share-based compensation plans	5,838	1,421	226
Shares purchased under share repurchase and deferred compensation plans	(11,255)	(1,383)	(1,757)
Net sales (purchases) of treasury shares	(5,417)	38	(1,531)
Net contributions from (distributions to) noncontrolling interests consisted of the following gross and net amounts:
Distributions to noncontrolling interests	(118)	(53)	(26)
Contributions from noncontrolling interests	4	17	2
Net contributions from (distributions to) noncontrolling interests	(114)	(36)	(24)
Capital expenditures
Additions to properties, plant and equipment	10,349	7,515	8,492
Additions to investments	1,147	460	136
Current-year dry hole expenditures	309	83	327
Payments for other assets and liabilities, net	169	(2)	(33)
Capital expenditures	11,974	8,056	8,922
Non-cash additions to properties, plant and equipment	$ 334	$ 316	$ 816