Income Taxes (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Jan. 29, 2016	Jan. 30, 2015
Components of Deferred Tax Assets
Impairment of equity method investment	$ 270	$ 0
Undistributed Earnings of International Subsidiaries
Undistributed earnings of international subsidiaries	153	112
Income Taxes
Deferred tax assets cumulative valuation allowance recorded	447	170
Foreign Country [Member]
Net Operating Loss Carryforwards
Cumulative net operating losses	580	557
Income Taxes
Deferred tax assets cumulative valuation allowance recorded	$ 177	$ 170
Foreign Country [Member] | Earliest Tax Year [Member]
Net Operating Loss Carryforwards
Range of expiration dates of net operating losses	Dec. 31, 2017
Foreign Country [Member] | Latest Tax Year [Member]
Net Operating Loss Carryforwards
Range of expiration dates of net operating losses	Dec. 31, 2035