Segment and Geographic Information Geographic Information (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Feb. 03, 2018	Oct. 28, 2017	Jul. 29, 2017	Apr. 29, 2017	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
Geographic Areas, Revenues from External Customers [Abstract]
Total revenue	$ 15,363	$ 9,320	$ 8,940	$ 8,528	$ 13,482	$ 8,945	$ 8,533	$ 8,443	$ 42,151	$ 39,403	$ 39,528
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets, net	2,421				2,293				2,421	2,293	2,346
United States [Member]
Geographic Areas, Revenues from External Customers [Abstract]
Total revenue									38,662	36,248	36,365
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets, net	2,205				2,120				2,205	2,120	2,189
Canada [Member]
Geographic Areas, Revenues from External Customers [Abstract]
Total revenue									3,187	2,899	2,917
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets, net	190				156				190	156	140
Other [Member]
Geographic Areas, Revenues from External Customers [Abstract]
Total revenue									302	256	246
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets, net	$ 26				$ 17				$ 26	$ 17	$ 17