Restructuring (Composition of Restructuring Charges) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 30, 2021	Feb. 01, 2020	Feb. 02, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 277	$ 41	$ 46
Mexico Exit And Corporate Reorganization [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	277
Mexico Exit And Corporate Reorganization [Member] | Domestic [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	133
Mexico Exit And Corporate Reorganization [Member] | International [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	144
Mexico Exit And Corporate Reorganization [Member] | Inventory Markdowns [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	23
Mexico Exit And Corporate Reorganization [Member] | Inventory Markdowns [Member] | International [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	23
Mexico Exit And Corporate Reorganization [Member] | Asset Impairments [Member] | Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	67
Mexico Exit And Corporate Reorganization [Member] | Asset Impairments [Member] | Domestic [Member] | Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	10
Mexico Exit And Corporate Reorganization [Member] | Asset Impairments [Member] | International [Member] | Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	57
Mexico Exit And Corporate Reorganization [Member] | Termination Benefits [Member] | Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	143
Mexico Exit And Corporate Reorganization [Member] | Termination Benefits [Member] | Domestic [Member] | Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	123
Mexico Exit And Corporate Reorganization [Member] | Termination Benefits [Member] | International [Member] | Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	20
Mexico Exit And Corporate Reorganization [Member] | Currency Translation Adjustment [Member] | Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	39
Mexico Exit And Corporate Reorganization [Member] | Currency Translation Adjustment [Member] | International [Member] | Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	39
Mexico Exit And Corporate Reorganization [Member] | Other [Member] | Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	5
Mexico Exit And Corporate Reorganization [Member] | Other [Member] | International [Member] | Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 5
U.S. Operating Model [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 41
Best Buy Mobile [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			47
Canadian brand consolidation
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ (1)