Condensed Consolidated Statement Of Cash Flows - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net income (loss) including noncontrolling interests		$ (770)	$ 2,406
Depreciation and depletion		5,819	4,571
Noncash inventory adjustment - lower of cost or market		2,245
Changes in operational working capital, excluding cash and debt		(942)	2,257
All other items - net		(78)	(896)
Net cash provided by operating activities		6,274	8,338
Cash flows from investing activities
Additions to property, plant and equipment		(5,945)	(5,199)
Proceeds associated with sales of subsidiaries, property, plant and equipment, and sales and returns of investments		86	107
Additional investments and advances		(728)	(910)
Other investing activities including collection of advances		220	209
Net cash used in investing activities		(6,367)	(5,793)
Cash flows from financing activities
Additions to long-term debt		8,466
Reductions in long-term debt		(2)
Reductions in short-term debt		(1,533)	(3,777)
Additions/(reductions) in commercial paper, and debt with three months or less maturity	[1]	5,829	6,776
Cash dividends to ExxonMobil shareholders		(3,719)	(3,505)
Cash dividends to noncontrolling interests		(45)	(43)
Changes in noncontrolling interests		94	(74)
Common stock acquired		(305)	(421)
Net cash used in financing activities		8,785	(1,044)
Effects of exchange rate changes on cash		(369)	43
Increase/(decrease) in cash and cash equivalents		8,323	1,544
Cash and cash equivalents at beginning of period		3,089	3,042
Cash and cash equivalents at end of period		11,412	4,586
Supplemental Disclosures
Income taxes paid		1,372	1,793
Cash interest paid - Included in cash flows from operating activities		313	247
Cash interest paid - Capitalized, included in cash flows from investing activities		155	175
Total cash interest paid		$ 468	$ 422

[1] Includes a net addition of commercial paper with a maturity of over three months of $8.2 billion in 2020 and $5.3 billion in 2019. The gross amount of commercial paper with a maturity of over three months issued was $13.1 billion in 2020 and $6.4 billion in 2019, while the gross amount repaid was $4.9 billion in 2020 and $1.1 billion in 2019.