Commitments and Contingencies (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 28, 2018	Jan. 29, 2017	Jan. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Outstanding inventory purchase obligation	$ 1,330
Outstanding capital purchase obligations	135
Purchase cost for Santa Clara campus building	335
Operating Leases, Future Minimum Payments Due [Abstract]
Future minimum operating lease payments - HQ	63
Operating Leases, Future Minimum Payments Due, Current	63
Operating Leases, Future Minimum Payments, Due in Two Years	53
Operating Leases, Future Minimum Payments, Due in Three Years	50
Operating Leases, Future Minimum Payments, Due in Four Years	44
Operating Leases, Future Minimum Payments, Due in Five Years	25
Operating Leases, Future Minimum Payments, Due Thereafter	11
Operating Leases, Future Minimum Payments Due	246
Operating Leases, Rent Expense	$ 54	$ 46	$ 45