Restructuring Charges Summary (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	May. 02, 2015	Jan. 31, 2015	Nov. 01, 2014	Aug. 02, 2014	May. 03, 2014	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014	Feb. 28, 2009
Restructuring Cost and Reserve [Line Items]
Vacant Space Reserve		$ 18								$ 18
Restructuring charges										198	$ 5	$ 149
Restructuring charges		$ 12	$ 7	$ (4)	$ 186	$ (7)	$ 5	$ 5	$ 2	201	23	259
Continuing Operations [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges										201	5	149
Restructuring charges										201	5
Continuing Operations [Member] | Restructuring Program Canadian Brand Consolidation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges										200
Continuing Operations [Member] | Restructuring Program 2013 Renew Blue [Member] [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring charges										(2)	11	155
Continuing Operations [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	[1]									3	(6)	(6)
Continuing Operations [Member] | International [Member] | Restructuring Program Canadian Brand Consolidation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges										200
Restructuring charges										$ 200
Discontinued Operations [Member] | Restructuring Program 2013 Renew Blue [Member] [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring charges											$ 18	10
Discontinued Operations [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	[2]											$ 100
Best Buy Europe [Member]
Restructuring Cost and Reserve [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired													50.00%

[1] (1) Represents activity related to our remaining vacant space liability for U.S. large-format store closures in fiscal 2013. We may continue to incur immaterial adjustments to the liability for changes in sublease assumptions or potential lease buyouts. In addition, lease payments for vacated stores will continue until leases expire or are terminated. The remaining vacant space liability was $18 million at January 30, 2016.

[2] (2) Activity primarily relates to our fiscal 2013 Best Buy Europe restructuring program, which is included in discontinued operations due to the sale of our 50% ownership interest in Best Buy Europe in fiscal 2014. Restructuring charges primarily consist of property and equipment impairments and employee termination benefits.