Goodwill and Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Oct. 28, 2011
Goodwill Allocated To Company Business Segments
Balance at beginning of period	$ 4,365
Goodwill acquired during the period	1,580
Goodwill, Translation and Purchase Accounting Adjustments	(2)
Balance at end of period	5,943
Goodwill and Intangible Assets Textuals [Abstract]
Acquired Finite-lived Intangible Asset, Amount	712
Acquired Indefinite-lived Intangible Asset, Amount	37
Large Enterprise [Member]
Goodwill Allocated To Company Business Segments
Balance at beginning of period	1,424
Goodwill acquired during the period	849
Goodwill, Translation and Purchase Accounting Adjustments	(2)
Balance at end of period	2,271
Public [Member]
Goodwill Allocated To Company Business Segments
Balance at beginning of period	2,164
Goodwill acquired during the period	407
Goodwill, Translation and Purchase Accounting Adjustments	(2)
Balance at end of period	2,569
Small and Medium Business [Member]
Goodwill Allocated To Company Business Segments
Balance at beginning of period	476
Goodwill acquired during the period	317
Goodwill, Translation and Purchase Accounting Adjustments	(1)
Balance at end of period	792
Consumer [Member]
Goodwill Allocated To Company Business Segments
Balance at beginning of period	301
Goodwill acquired during the period	7
Goodwill, Translation and Purchase Accounting Adjustments	3
Balance at end of period	$ 311
Minimum [Member]
Goodwill and Intangible Assets Textuals [Abstract]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	3
Maximum [Member]
Goodwill and Intangible Assets Textuals [Abstract]
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life	11