CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Millions, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Non-controlling Interest in VMware
Balance, January 1, 2011 at Dec. 31, 2010	$ 18,634	$ 21	$ 4,284	$ 13,659	$ (93)	$ 763
Beginning Balance (in shares) at Dec. 31, 2010		2,070
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Stock issued through stock option and stock purchase plans		52
Stock issued through stock option and stock purchase plans	673	0	673
Tax benefit from stock options exercised	383		383
Restricted stock grants, cancellations and withholdings, net		10
Restricted stock grants, cancellations and withholdings, net	(120)	0	(120)
Repurchase of common stock		(82)
Repurchase of common stock	(2,000)	0	(2,000)
EMC purchase of VMware stock	(400)		(355)			(45)
Stock options issued in business acquisitions	3		3
Stock-based compensation	838		838
Impact from equity transactions of VMware, Inc.	(310)		(417)			107
Recognition of actuarial net gain (loss) from pension and other postretirement plan, net of taxes (benefits) of $26, $(5) and $(11)	(22)				(22)
Change in market value of investments	(26)				(22)	(4)
Change in market value of derivatives	(94)				(94)	0
Translation adjustment	(4)				(4)
Reclassification of convertible debt (to)/from mezzanine (Note E)	116		116
Net income	2,609			2,461		148
Balance, December 31, 2011 at Dec. 31, 2011	20,280	21	3,405	16,120	(235)	969
Ending Balance (in shares) at Dec. 31, 2011		2,050
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Stock issued through stock option and stock purchase plans		42
Stock issued through stock option and stock purchase plans	560	0	560
Tax benefit from stock options exercised	267		267
Restricted stock grants, cancellations and withholdings, net		11
Restricted stock grants, cancellations and withholdings, net	(126)	0	(126)
Repurchase of common stock		(27)
Repurchase of common stock	(700)	0	(700)
EMC purchase of VMware stock	(300)		(258)			(42)
Stock options issued in business acquisitions	20		20
Stock-based compensation	898		898
Impact from equity transactions of VMware, Inc.	(350)		(436)			86
Recognition of actuarial net gain (loss) from pension and other postretirement plan, net of taxes (benefits) of $26, $(5) and $(11)	(14)				(14)
Change in market value of investments	48				47	1
Change in market value of derivatives	(8)				(8)	0
Translation adjustment	2				2
Convertible debt conversions and warrant settlement	(1)	(31)	(1)
Stock Issued During Period Value Stock Conversion Of Convertible Securities And Warrants		0
Reclassification of convertible debt (to)/from mezzanine (Note E)	62		62
Net income	2,886			2,733		153
Balance, December 31, 2011 at Dec. 31, 2012	23,524	21	3,691	18,853	(208)	1,167
Ending Balance (in shares) at Dec. 31, 2012	2,107	2,107
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Stock issued through stock option and stock purchase plans		24
Stock issued through stock option and stock purchase plans	342	0	342
Tax benefit from stock options exercised	90		90
Restricted stock grants, cancellations and withholdings, net		11
Restricted stock grants, cancellations and withholdings, net	(126)	0	(126)
Repurchase of common stock		(122)
Repurchase of common stock	(3,000)	(1)	(2,999)
EMC purchase of VMware stock	(150)		(124)			(26)
Stock options issued in business acquisitions	1		1
Stock-based compensation	946		946
Cash dividends declared	(628)		0	(628)		0
Impact from equity transactions of VMware, Inc.	(333)		(473)			140
Recognition of actuarial net gain (loss) from pension and other postretirement plan, net of taxes (benefits) of $26, $(5) and $(11)	43				43
Change in market value of investments	(33)				(33)	0
Change in market value of derivatives	3				3	0
Translation adjustment	(44)				(44)
Reclassification of convertible debt (to)/from mezzanine (Note E)	58		58
Net income	3,093			2,889		204
Balance, December 31, 2011 at Dec. 31, 2013	$ 23,786	$ 20	$ 1,406	$ 21,114	$ (239)	$ 1,485
Ending Balance (in shares) at Dec. 31, 2013	2,020	2,020