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Restructuring Charges Restructuring Narrative (Details) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Aug. 04, 2018 USD ($) | Jul. 29, 2017 USD ($) | Aug. 04, 2018 USD ($) store | Jul. 29, 2017 USD ($) | Feb. 03, 2018 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges | $ 17 | $ 2 | $ 47 | $ 2 |
Best Buy Mobile |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges | 17 | 0 | $ 47 | 0 |
Number of Stores to be Closed | store |  |  | 257 |  |
Restructuring Reserve | 3 |  | $ 3 |  | $ 8
Canadian brand consolidation |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges | 0 | 1 | 0 | 1 |
Renew Blue |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges | 0 | $ 3 | 0 | $ 3 |
Facility closure and other costs | Best Buy Mobile |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges | 20 |  | 49 |  |
Restructuring Reserve | 2 |  | 2 |  | $ 0
Facility closure and other costs | Canadian brand consolidation |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Reserve | 11 |  | 11 |  |
Facility closure and other costs | Renew Blue |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Reserve | 9 |  | 9 |  |
Facility closure and other costs | U.S. large format store closures |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring Reserve | $ 3 |  | $ 3 |  |

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