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Mergers and Acquisitions (Unaudited Pro Forma) (Details) - Pioneer Natural Resources Merger - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024
Business acquisition [Line Items]
Sales and other operating revenues	$ 87,792	$ 266,349
Net income (loss) attributable to ExxonMobil	$ 8,610	$ 26,866

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