Schedule II (Details) - USD ($) $ in Millions		12 Months Ended
		Jan. 29, 2017	Jan. 31, 2016	Jan. 25, 2015
Allowance for Trade Receivables
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance		$ 2	$ 3	$ 1
Valuation Allowances and Reserves, Additions	[1]	1	0	3
Valuation Allowances and Reserves, Deductions	[1]	0	(1)	(1)
Valuation Allowances and Reserves, Balance		3	2	3
Allowance for Sales Returns
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance		9	14	14
Valuation Allowances and Reserves, Additions	[2]	9	9	12
Valuation Allowances and Reserves, Deductions	[3]	(8)	(14)	(12)
Valuation Allowances and Reserves, Balance		10	9	14
Valuation Allowance of Deferred Tax Assets
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance		272	261	244
Valuation Allowances and Reserves, Additions	[4]	81	11	17
Valuation Allowances and Reserves, Deductions		0	0	0
Valuation Allowances and Reserves, Balance		$ 353	$ 272	$ 261

[1] Additions represent allowance for doubtful accounts charged to expense and deductions represent amounts recorded as reduction to expense upon reassessment of allowance for doubtful accounts at period end.

[2] Represents allowance for sales returns estimated at the time revenue is recognized primarily based on historical return rates and is charged as a reduction to revenue.

[3] Represents sales returns.

[4] Represents change in valuation allowance primarily related to state and certain foreign deferred tax assets that management has determined not likely to be realized due, in part, to projections of future taxable income of the respective jurisdictions.