Condensed Consolidated Statement Of Cash Flows - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities
Net income (loss) including noncontrolling interests		$ (1,939)	$ 5,797
Depreciation and depletion		10,735	9,202
Noncash inventory adjustment - lower of cost or market		176
Changes in operational working capital, excluding cash and debt		(2,402)	1,014
All other items - net		(296)	(1,728)
Net cash provided by operating activities		6,274	14,285
Cash flows from investing activities
Additions to property, plant and equipment		(10,362)	(11,372)
Proceeds associated with sales of subsidiaries, property, plant and equipment, and sales and returns of investments		129	140
Additional investments and advances		(1,524)	(1,730)
Other investing activities including collection of advances		309	292
Net cash used in investing activities		(11,448)	(12,670)
Cash flows from financing activities
Additions to long-term debt		23,186	43
Reductions in long-term debt		(3)
Reductions in short-term debt		(1,618)	(3,805)
Additions/(reductions) in commercial paper, and debt with three months or less maturity	[1]	1,033	11,126
Contingent consideration liability		(21)
Cash dividends to ExxonMobil shareholders		(7,434)	(7,220)
Cash dividends to noncontrolling interests		(93)	(100)
Changes in noncontrolling interests		317	(119)
Common stock acquired		(305)	(421)
Net cash used in financing activities		15,062	(496)
Effects of exchange rate changes on cash		(401)	52
Increase/(decrease) in cash and cash equivalents		9,487	1,171
Cash and cash equivalents at beginning of period		3,089	3,042
Cash and cash equivalents at end of period		12,576	4,213
Supplemental Disclosures
Income taxes paid		1,768	3,884
Cash interest paid - Included in cash flows from operating activities		290	277
Cash interest paid - Capitalized, included in cash flows from investing activities		335	355
Total cash interest paid		$ 625	$ 632

[1] Includes a net addition of commercial paper with a maturity of over three months of $7.0 billion in 2020 and $6.5 billion in 2019. The gross amount of commercial paper with a maturity of over three months issued was $20.5 billion in 2020 and $12.3 billion in 2019, while the gross amount repaid was $13.5 billion in 2020 and $5.8 billion in 2019.