Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Name:	us-gaap_RestructuringCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Restructuring Charges (Narrative) (Details) $ in Millions	3 Months Ended		9 Months Ended
Restructuring Charges (Narrative) (Details) $ in Millions	Nov. 02, 2019 USD ($)	Nov. 03, 2018 USD ($)	Nov. 02, 2019 USD ($)	Nov. 03, 2018 USD ($)	Mar. 01, 2018 store
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ (7)		$ 41	$ 47
Best Buy Mobile [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 0		47
Number of stores to be closed \| store					257
Facility closure and other costs [Member] \| Best Buy Mobile [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges				49
Termination benefits [Member] \| Best Buy Mobile [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges				$ (2)