Financial Instruments and Derivatives (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Total Gross Assets & Liabilities [Domain]
Fair value balance sheet grouping financial statement captions [Line Items]
Derivative assets	$ 7,914	$ 4,429
Advances to/receivables from equity companies	6,778	6,633
Other long-term financial assets	3,067	2,972
Derivative liabilities	7,769	4,977
Long-term debt	28,032	30,697
Long-term obligations to equity companies	1,181	1,393
Other long-term financial liabilities	406	583
Effect of Counterparty Netting
Fair value balance sheet grouping financial statement captions [Line Items]
Derivative assets	(7,037)	(3,913)
Derivative liabilities	(7,037)	(3,913)
Effect of Collateral Netting
Fair value balance sheet grouping financial statement captions [Line Items]
Derivative assets	(141)	(3)
Derivative liabilities	(213)	(341)
Difference in Carrying Value and Fair Value
Fair value balance sheet grouping financial statement captions [Line Items]
Advances to/receivables from equity companies	258	451
Other long-term financial assets	250	247
Long-term debt	2,726	3,935
Long-term obligations to equity companies	(36)	(47)
Other long-term financial liabilities	13	57
Net Carrying Value
Fair value balance sheet grouping financial statement captions [Line Items]
Derivative assets	736	513
Advances to/receivables from equity companies	7,036	7,084
Other long-term financial assets	3,317	3,219
Derivative liabilities	519	723
Long-term debt	30,758	34,632
Long-term obligations to equity companies	1,145	1,346
Other long-term financial liabilities	$ 419	$ 640
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other assets, including intangibles – net, Notes and accounts receivable – net	Other assets, including intangibles – net, Notes and accounts receivable – net
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Accounts payable and accrued liabilities, Long-term obligations	Accounts payable and accrued liabilities, Long-term obligations
Level 1
Fair value balance sheet grouping financial statement captions [Line Items]
Derivative assets	$ 6,312	$ 3,223
Other long-term financial assets	1,508	1,468
Derivative liabilities	6,381	3,561
Long-term debt	25,221	28,884
Level 2
Fair value balance sheet grouping financial statement captions [Line Items]
Derivative assets	1,602	1,206
Advances to/receivables from equity companies	1,931	2,466
Derivative liabilities	1,388	1,416
Long-term debt	2,811	1,813
Level 3
Fair value balance sheet grouping financial statement captions [Line Items]
Advances to/receivables from equity companies	4,847	4,167
Other long-term financial assets	1,559	1,504
Long-term obligations to equity companies	1,181	1,393
Other long-term financial liabilities	$ 406	$ 583

EXXON MOBIL CORP 10-Q