Extended Protection Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 29, 2016	May. 01, 2015
Changes in deferred revenue for extended protection plan contracts
Deferred revenue - extended protection plans, beginning of period	$ 729	$ 730
Additions to deferred revenue	86	82
Deferred revenue recognized	(89)	(85)
Deferred revenue - extended protection plans, end of period	$ 726	$ 727