Goodwill and Intangible Assets (Details) (USD $) In Millions	3 Months Ended
	Apr. 29, 2011
Goodwill Allocated To Company Business Segments
Balance at beginning of period	$ 4,365
Goodwill acquired during the period	1,039
Goodwill, Translation and Purchase Accounting Adjustments	2
Balance at end of period	5,406
Goodwill and Intangible Assets Textuals [Abstract]
Acquired Finite-lived Intangible Asset, Amount	537
Large Enterprise [Member]
Goodwill Allocated To Company Business Segments
Balance at beginning of period	1,424
Goodwill acquired during the period	596
Goodwill, Translation and Purchase Accounting Adjustments	2
Balance at end of period	2,022
Public [Member]
Goodwill Allocated To Company Business Segments
Balance at beginning of period	2,164
Goodwill acquired during the period	290
Goodwill, Translation and Purchase Accounting Adjustments	0
Balance at end of period	2,454
Small and Medium Business [Member]
Goodwill Allocated To Company Business Segments
Balance at beginning of period	476
Goodwill acquired during the period	153
Goodwill, Translation and Purchase Accounting Adjustments	0
Balance at end of period	629
Consumer [Member]
Goodwill Allocated To Company Business Segments
Balance at beginning of period	301
Goodwill acquired during the period	0
Goodwill, Translation and Purchase Accounting Adjustments	0
Balance at end of period	$ 301