Goodwill and Intangible Assets (Tables)

12 Months Ended

Jan. 31, 2014

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:

	HES			NSS		Total
	(in millions)
Balance at January 31, 2012	$	600		$	709	$	1,309
Acquisitions	395			—		395
Corporate reorganizations	(10		)	10		—
Balance at January 31, 2013	985			719		1,704
Corporate reorganizations	(69		)	69		—
Balance at January 31, 2014	$	916		$	788	$	1,704

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 31
	2014							2013
	Gross carrying value		Accumulated amortization			Net carrying value		Gross carrying value		Accumulated amortization			Net carrying value
	(in millions)
Finite-lived intangible assets:
Customer relationships	$	102	$	(54	)	$	48	$	154	$	(57	)	$	97
Software and technology	65		(36		)	29		97		(30		)	67
Other	4		(1		)	3		1		(1		)	—
Total finite-lived intangible assets	171		(91		)	80		252		(88		)	164
Indefinite-lived intangible assets:
In-process research and development	10		—			10		10		—			10
Trade names	4		—			4		4		—			4
Total indefinite-lived intangible assets	14		—			14		14		—			14
Total intangible assets	$	185	$	(91	)	$	94	$	266	$	(88	)	$	178

Schedule of Amortization Expense for Finite-Lived Intangible Assets

The estimated annual amortization expense related to finite-lived intangible assets as of January 31, 2014 was as follows:

Year Ending January 31
	(in millions)
2015	$	22
2016	20
2017	17
2018	11
2019	6
2020 and thereafter	4
	$	80