Goodwill and Intangible Assets, Intangible Assets (Details 1) (USD $) In Millions, unless otherwise specified	Feb. 03, 2012	Jan. 28, 2011
Intangible assets associated with completed acquisitions
Gross Carrying Amount	$ 2,876	$ 2,132
Accumulated Amortization	(1,079)	(688)
Amortizable intangible assets	1,797	1,444
Intangible Assets Gross Excluding Goodwill	2,936	2,183
Net Carrying Amount	1,857	1,495
Customer Relationships
Intangible assets associated with completed acquisitions
Gross Carrying Amount	1,569	1,363
Accumulated Amortization	(506)	(309)
Net Carrying Amount	1,063	1,054
Technology
Intangible assets associated with completed acquisitions
Gross Carrying Amount	1,156	647
Accumulated Amortization	(490)	(322)
Net Carrying Amount	666	325
Non-compete agreements
Intangible assets associated with completed acquisitions
Gross Carrying Amount	70	68
Accumulated Amortization	(42)	(26)
Net Carrying Amount	28	42
Tradenames
Intangible assets associated with completed acquisitions
Gross Carrying Amount	81	54
Accumulated Amortization	(41)	(31)
Net Carrying Amount	40	23
In-process research and development
Intangible assets associated with completed acquisitions
In-process research and development	34	26
Indefinite lived intangible assets
Intangible assets associated with completed acquisitions
In-process research and development	$ 26	$ 25