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v3.20.4

Restructuring (Narrative) (Details) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jan. 30, 2021 USD ($) | Oct. 31, 2020 USD ($) | Aug. 03, 2019 USD ($) | Jan. 30, 2021 USD ($) | Feb. 01, 2020 USD ($) | Feb. 02, 2019 USD ($) | Mar. 18, 2018 store
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring charges |  |  |  | $ 254,000,000 | $ 41,000,000 | $ 46,000,000 |
U.S. Operating Model [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring Reserve | $ 0 |  |  | 0 |  |  |
Cumulative Amount | 41,000,000 |  |  | 41,000,000 |  |  |
Best Buy Mobile [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Cumulative Amount | 56,000,000 |  |  | 56,000,000 |  |  |
Best Buy Mobile [Member] | Domestic [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Number of stores to be closed | store |  |  |  |  |  |  | 257
Facility Closure Costs [Member] | Best Buy Mobile [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Cumulative Amount | 49,000,000 |  |  | 49,000,000 |  |  |
Voluntary Early Retirement [Member] | U.S. Operating Model [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring charges |  |  | $ 10,000,000 |  |  |  |
Termination Benefits [Member] | Best Buy Mobile [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Cumulative Amount | 6,000,000 |  |  | 6,000,000 |  |  |
Termination Benefits [Member] | Mexico Exit And Corporate Reorganization [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring charges | 87,000,000 | $ 46,000,000 |  |  |  |  |
Restructuring Reserve | 124,000,000 |  |  | 124,000,000 |  |  |
Asset Impairment [Member] | Best Buy Mobile [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Cumulative Amount | $ 1,000,000 |  |  | $ 1,000,000 |  |  |

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