Goodwill and Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Nov. 01, 2013	Aug. 02, 2013	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Goodwill and Intangible Assets [Line Items]
Amortization expense related to amortizable intangible assets			$ 36	$ 37	$ 32
Intangible asset impairment charges	19	30	51	0	0
Reveal Imaging Technologies, Inc. | Health and Engineering
Goodwill and Intangible Assets [Line Items]
Intangible asset impairment charges			30
Vitalize and maxIT | Health and Engineering
Goodwill and Intangible Assets [Line Items]
Intangible asset impairment charges			19
Other Intangible Assets
Goodwill and Intangible Assets [Line Items]
Intangible asset impairment charges			2
SAIC
Goodwill and Intangible Assets [Line Items]
Goodwill			$ 491	$ 491