Condensed Consolidated Statement Of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities
Net income including noncontrolling interests	$ 5,075	$ 9,370
Depreciation and depletion	4,300	4,192
Changes in operational working capital, excluding cash and debt	(509)	2,452
All other items - net	(868)	(911)
Net cash provided by operating activities	7,998	15,103
Cash flows from investing activities
Additions to property, plant and equipment	(6,844)	(7,328)
Proceeds associated with sales of subsidiaries, property, plant and equipment, and sales and returns of investments	484	1,111
Additional investments and advances	(282)	(457)
Other investing activities - net	290	368
Net cash used in investing activities	(6,352)	(6,306)
Cash flows from financing activities
Additions to long-term debt	8,000	5,500
Reductions in long-term debt	(10)
Additions/(reductions) in short-term debt - net	(157)	(446)
Additions/(reductions) in debt with three months or less maturity	(3,956)	(6,222)
Cash dividends to ExxonMobil shareholders	(2,910)	(2,732)
Cash dividends to noncontrolling interests	(40)	(58)
Common stock acquired	(1,781)	(3,860)
Common stock sold		2
Net cash used in financing activities	(854)	(7,816)
Effects of exchange rate changes on cash	(224)	(24)
Increase/(decrease) in cash and cash equivalents	568	957
Cash and cash equivalents at beginning of period	4,616	4,644
Cash and cash equivalents at end of period	5,184	5,601
Supplemental Disclosures
Income taxes paid	1,226	4,145
Cash interest paid	$ 170	$ 87