Goodwill and Intangible Assets (Tables)

12 Months Ended

Jan. 30, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Goodwill by Segment

The balance and changes in the carrying amount of goodwill by segment were as follows:

	NSS		HES			Total
	(in millions)
Balance at January 31, 2013	$	719	$	974		$	1,693
Corporate reorganizations	69		(69		)	—
Balance at January 31, 2014	$	788	$	905		$	1,693
Goodwill impairment	—		(486		)	(486		)
Balance at January 30, 2015	$	788	$	419		$	1,207

Schedule of Intangible Assets Including Estimates of Assets Acquired

Intangible assets, including those arising from preliminary estimates of assets acquired relating to acquisitions, consisted of the following:

	January 30, 2015							January 31, 2014
	Gross carrying value		Accumulated amortization			Net carrying value		Gross carrying value		Accumulated amortization			Net carrying value
	(in millions)
Finite-lived intangible assets:
Customer relationships	$	70	$	(57	)	$	13	$	94	$	(47	)	$	47
Software and technology	52		(41		)	11		65		(36		)	29
Other	—		—			—		4		(1		)	3
Total finite-lived intangible assets	122		(98		)	24		163		(84		)	79
Indefinite-lived intangible assets:
In-process research and development	9		—			9		10		—			10
Trade names	4		—			4		4		—			4
Total indefinite-lived intangible assets	13		—			13		14		—			14
Total intangible assets	$	135	$	(98	)	$	37	$	177	$	(84	)	$	93

Schedule of Amortization Expense for Finite-Lived Intangible Assets

The estimated annual amortization expense related to finite-lived intangible assets as of January 30, 2015 was as follows:

Year Ending January 30
	(in millions)
2016	$	8
2017	7
2018	5
2019	3
2020	1
2021 and thereafter	—
	$	24