Amount charged against earnings in the period for incurred and estimated costs, including inventory and non-inventory related costs, associated with restructurings pursuant to a program that is planned and controlled by management, and materially changes either the scope of a business undertaken by an entity, or the manner in which that business is conducted.

No definition available.

Name:	bby_RestructuringChargesOperatingIncomeImpact
Namespace Prefix:	bby_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Restructuring Charges - Fiscal 2011 Restructuring (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								11 Months Ended		12 Months Ended
	Feb. 01, 2014	Nov. 02, 2013	Aug. 03, 2013	May 04, 2013	Feb. 02, 2013	Nov. 03, 2012	Aug. 04, 2012	May 05, 2012	Feb. 02, 2013	Jan. 28, 2012	Feb. 01, 2014	Mar. 03, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 115	$ 31	$ 7	$ 6	$ 169	$ 34	$ 91	$ 127	$ 449	$ 280	$ 259	$ 287
Restructuring Program 2011 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges									$ (13)			$ 44