Summary of Significant Accounting Policies - Revenue (Details) - USD ($) $ in Millions	Jan. 30, 2016	Jan. 31, 2015
Accounting Policies [Abstract]
Sales returns reserve	$ 25	$ 25
Deferred revenue	357	326
Deferred Revenue, Current, Including Held-for-Sale		376
Disposal Group, Including Discontinued Operation, Deferred Revenue, Current		50
Deferred revenue, noncurrent	$ 45	$ 49