Goodwill and Intangible Assets (Schedule of Changes in Goodwill by Segment) (Detail) - USD ($) $ in Millions	3 Months Ended	11 Months Ended		12 Months Ended
	Aug. 01, 2014	Jan. 01, 2016	Jan. 02, 2015	Jan. 30, 2015	Jan. 31, 2014
Goodwill [Roll Forward]
Beginning balance, Goodwill		$ 1,207	$ 1,693	$ 1,693
Goodwill impairment	$ (486)	0	(486)	(486)	$ 0
Ending balance, Goodwill		1,207		1,207	1,693
NSS
Goodwill [Roll Forward]
Beginning balance, Goodwill		788	788	788
Goodwill impairment		0		0
Ending balance, Goodwill		788		788	788
HES
Goodwill [Roll Forward]
Beginning balance, Goodwill		419	$ 905	905
Goodwill impairment		0		(486)
Ending balance, Goodwill		$ 419		$ 419	$ 905