Goodwill and Intangible Assets (Schedule of Carrying Value of Goodwill by Segment) (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
Nov. 01, 2013
Goodwill [Line Items]
Beginning balance, Goodwill	$ 1,704
Corporate reorganizations	0
Ending balance, Goodwill	1,704
Health and Engineering
Goodwill [Line Items]
Beginning balance, Goodwill	985
Corporate reorganizations	69
Ending balance, Goodwill	916
National Security Solutions
Goodwill [Line Items]
Beginning balance, Goodwill	719
Corporate reorganizations	(69)
Ending balance, Goodwill	$ 788

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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