Segments Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 29, 2017	Jul. 30, 2016	Jul. 29, 2017	Jul. 30, 2016
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 8,940	$ 8,533	$ 17,468	$ 16,976
Domestic Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	8,272	7,889	16,184	15,718
International Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 668	$ 644	$ 1,284	$ 1,258