Restructuring Charges - Fiscal 2011 (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
Nov. 02, 2013	Nov. 03, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 144	$ 251
Restructuring Program 2011 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ (10)

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