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 Interests
Balance, January 1, 2013 at Dec. 31, 2011	$ 20,280	$ 21	$ 3,405	$ 16,121	$ (235)	$ 968
Beginning 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 (in shares)		30
Stock issued through stock option and stock purchase plans	388	0	388
Tax benefit from stock options exercised	257		257
Restricted stock grants, cancellations and withholdings, net (in shares)		10
Restricted stock grants, cancellations and withholdings, net	(120)	0	(120)
Repurchase of common stock (in shares)		(15)
Repurchase of common stock	(410)		(410)
EMC purchase of VMware stock	(132)		(114)			(18)
Stock options issued in business acquisitions	18		18
Stock-based compensation	661		661
Impact from equity transactions of non-controlling interests	(186)		(275)			89
Change in market value of investments	84				83	1
Change in market value of derivatives	(11)				(11)
Translation adjustment	8				8
Convertible debt conversions and warrant settlement (in shares)		32
Convertible debt conversions and warrant settlement	(2)	(1)	(1)
Reclassification of convertible debt (to)/from mezzanine (Note 4)	(46)		(46)
Net income	1,974			1,863		111
Balance, September 30, 2013 at Sep. 30, 2012	22,855	20	3,855	17,984	(155)	1,151
Ending Balance (in shares) at Sep. 30, 2012		2,107
Balance, January 1, 2013 at Dec. 31, 2012	23,524	21	3,691	18,853	(208)	1,167
Beginning 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 (in shares)		21
Stock issued through stock option and stock purchase plans	302	0	302
Tax benefit from stock options exercised	115		115
Restricted stock grants, cancellations and withholdings, net (in shares)		10
Restricted stock grants, cancellations and withholdings, net	(115)	0	(115)
Repurchase of common stock (in shares)		(80)
Repurchase of common stock	(2,000)	0	(2,000)
EMC purchase of VMware stock	(150)		(124)			(26)
Stock options issued in business acquisitions	1		1
Stock-based compensation	706		706
Cash dividends declared	(422)			(422)
Impact from equity transactions of non-controlling interests	(184)		(336)			152
Change in market value of investments	(37)				(36)	(1)
Change in market value of derivatives	(3)				(3)	0
Translation adjustment	(44)				(44)
Reclassification of convertible debt (to)/from mezzanine (Note 4)	49		49
Net income	2,003			1,867		136
Balance, September 30, 2013 at Sep. 30, 2013	$ 23,745	$ 21	$ 2,289	$ 20,298	$ (291)	$ 1,428
Ending Balance (in shares) at Sep. 30, 2013	2,058	2,058