Condensed Consolidated Statement Of Cash Flows - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities
Net income including noncontrolling interests		$ 7,354	$ 3,462
Depreciation and depletion		9,171	9,586
Changes in operational working capital, excluding cash and debt		(228)	(1,725)
All other items - net		(1,177)	(1,992)
Net cash provided by operating activities		15,120	9,331
Cash flows from investing activities
Additions to property, plant and equipment		(5,988)	(8,872)
Proceeds associated with sales of subsidiaries, property, plant and equipment, and sales and returns of investments		841	1,206
Additional investments and advances		(1,793)	(311)
Other investing activities - net		301	481
Net cash used in investing activities		(6,639)	(7,496)
Cash flows from financing activities
Additions to long-term debt		60	11,964
Additions to short-term debt		1,735
Reductions in short-term debt		(2,722)	(257)
Additions/(reductions) in commercial paper, and debt with three months or less maturity	[1]	(321)	(5,966)
Cash dividends to ExxonMobil shareholders		(6,423)	(6,187)
Cash dividends to noncontrolling interests		(91)	(85)
Changes in noncontrolling interests		(29)
Common stock acquired		(514)	(727)
Common stock sold			7
Net cash used in financing activities		(8,305)	(1,251)
Effects of exchange rate changes on cash		209	69
Increase/(decrease) in cash and cash equivalents		385	653
Cash and cash equivalents at beginning of period		3,657	3,705
Cash and cash equivalents at end of period		4,042	4,358
Supplemental Disclosures
Income taxes paid		3,247	2,144
Cash interest paid		$ 587	$ 334

[1] Includes a net addition of commercial paper with a maturity of over three months of $0.2 billion in 2017 and $0.1 billion in 2016. The gross amount of commercial paper with a maturity of over three months issued was $2.2 billion in 2017 and $1.5 billion in 2016, while the gross amount repaid was $2.0 billion in 2017 and $1.4 billion in 2016.