Condensed Consolidated Statement Of Changes In Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Earnings Reinvested	Accumulated Other Comprehensive Income	Common Stock Held in Treasury	ExxonMobil Share of Equity	Non-controlling Interests
Balance at Dec. 31, 2023	$ 212,538	$ 17,781	$ 453,927	$ (11,989)	$ (254,917)	$ 204,802	$ 7,736
Balance (in shares) - issued at Dec. 31, 2023	8,019
Balance (in shares) - in treasury at Dec. 31, 2023	(4,048)
Balance (in shares) - outstanding at Dec. 31, 2023	3,971
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amortization of stock-based awards	$ 197	197				197
Other	(1)	(7)				(7)	6
Net income (loss) for the period	8,566		8,220			8,220	346
Dividends - common shares (company)			(3,808)			(3,808)
Dividends - common shares (NCI)							(166)
Dividends - common shares (total)	(3,974)
Other comprehensive income (loss)	(1,300)			(1,180)		(1,180)	(120)
Share repurchases, at cost (company)					(2,978)	(2,978)
Share repurchases, at cost (total)	$ (2,978)
Share repurchases, at cost (in shares)	(28)
Dispositions	$ 4				4	4
Balance at Mar. 31, 2024	$ 213,052	17,971	458,339	(13,169)	(257,891)	205,250	7,802
Balance (in shares) - issued at Mar. 31, 2024	8,019
Balance (in shares) - in treasury at Mar. 31, 2024	(4,076)
Balance (in shares) - outstanding at Mar. 31, 2024	3,943
Balance at Dec. 31, 2024	$ 270,606	46,238	470,903	(14,619)	(238,817)	263,705	6,901
Balance (in shares) - issued at Dec. 31, 2024	8,019
Balance (in shares) - in treasury at Dec. 31, 2024	(3,666)
Balance (in shares) - outstanding at Dec. 31, 2024	4,353
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amortization of stock-based awards	$ 194	194				194
Other	(1)	(6)	9			3	(4)
Net income (loss) for the period	8,033		7,713			7,713	320
Dividends - common shares (company)			(4,335)			(4,335)
Dividends - common shares (NCI)							(141)
Dividends - common shares (total)	(4,476)
Other comprehensive income (loss)	291			281		281	10
Share repurchases, at cost (company)					(4,852)	(4,852)
Share repurchases, at cost (total)	$ (4,852)
Share repurchases, at cost (in shares)	(43)
Dispositions	$ 11				11	11
Balance at Mar. 31, 2025	$ 269,806	$ 46,426	$ 474,290	$ (14,338)	$ (243,658)	$ 262,720	$ 7,086
Balance (in shares) - issued at Mar. 31, 2025	8,019
Balance (in shares) - in treasury at Mar. 31, 2025	(3,709)
Balance (in shares) - outstanding at Mar. 31, 2025	4,310