New Revenue Accounting Standard (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 29, 2018	Jan. 29, 2018	Jan. 28, 2018
As Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred Revenue			$ 68
New Revenue Accounting Standard
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax	$ 7
Deferred Revenue	74	$ 63
Adjustment to Retained Earnings upon Adoption of New Revenue Standard, Deferred Revenue Adjustment	(5)
Deferred Revenue, Additions	86
Deferred Revenue, Revenue Recognized	(75)
Revenue, Remaining Performance Obligation	$ 243
Percent of Remaining Performance Obligations to be Recognized Over the Next Twelve Months	50.00%