Consolidated Statement Of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities
Net income including noncontrolling interests	$ 33,448	$ 47,681	$ 42,206
Adjustments for noncash transactions
Depreciation and depletion	17,182	15,888	15,583
Deferred income tax charges/(credits)	754	3,142	142
Postretirement benefits expense in excess of/(less than) net payments	2,291	(315)	544
Other long-term obligation provisions in excess of/(less than) payments	(2,566)	1,643	(151)
Dividends received greater than/(less than) equity in current earnings of equity companies	3	(1,157)	(273)
Changes in operational working capital, excluding cash and debt
Reduction/(increase) - Notes and accounts receivable	(305)	(1,082)	(7,906)
Reduction/(increase) - Inventories	(1,812)	(1,873)	(2,208)
Reduction/(increase) - Other current assets	(105)	(42)	222
Increase/(reduction) - Accounts and other payables	(2,498)	3,624	8,880
Net (gain) on asset sales	(1,828)	(13,018)	(2,842)
All other items - net	350	1,679	1,148
Net cash provided by operating activities	44,914	56,170	55,345
Cash flows from investing activities
Additions to property, plant and equipment	(33,669)	(34,271)	(30,975)
Proceeds associated with sales of subsidiaries, property, plant and equipment, and sales and returns of investments	2,707	7,655	11,133
Decrease/(increase) in restricted cash and cash equivalents	72	63	224
Additional investments and advances	(4,435)	(598)	(3,586)
Collection of advances	1,124	1,550	1,119
Additions to marketable securities			(1,754)
Sales of marketable securities			1,674
Net cash used in investing activities	(34,201)	(25,601)	(22,165)
Cash flows from financing activities
Additions to long-term debt	345	995	702
Reductions in long-term debt	(13)	(147)	(266)
Additions to short-term debt	16	958	1,063
Reductions in short-term debt	(756)	(4,488)	(1,103)
Additions/(reductions) in debt with three months or less maturity	12,012	(226)	1,561
Cash dividends to ExxonMobil shareholders	(10,875)	(10,092)	(9,020)
Cash dividends to noncontrolling interests	(304)	(327)	(306)
Changes in noncontrolling interests	(1)	204	(16)
Tax benefits related to stock-based awards	48	130	260
Common stock acquired	(15,998)	(21,068)	(22,055)
Common stock sold	50	193	924
Net cash used in financing activities	(15,476)	(33,868)	(28,256)
Effects of exchange rate changes on cash	(175)	217	(85)
Increase/(decrease) in cash and cash equivalents	(4,938)	(3,082)	4,839
Cash and cash equivalents at beginning of year	9,582	12,664	7,825
Cash and cash equivalents at end of year	$ 4,644	$ 9,582	$ 12,664