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Restructuring Charges Canadian Brand Consolidation (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 28, 2017 USD ($) | Oct. 29, 2016 USD ($) | Jul. 30, 2016 USD ($) | Apr. 30, 2016 USD ($) | Jan. 30, 2016 USD ($) | Oct. 31, 2015 USD ($) | Aug. 01, 2015 USD ($) | May 02, 2015 USD ($) | Jan. 28, 2017 USD ($) store | Jan. 30, 2016 USD ($) | Jan. 31, 2015 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  |  | $ 39 | $ 198 | $ 5
Restructuring charges |  | $ 9 | $ 1 | $ 0 | $ 29 | $ 12 | $ 7 | $ (4) | $ 186 | $ 39 | 201 | 23
Restructuring Program Canadian Brand Consolidation [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of Stores to be Closed | store |  |  |  |  |  |  |  |  |  | 66 |  |
Payments for Restructuring |  |  |  |  |  |  |  |  |  | $ (39) | (71) |
Restructuring Reserve, Accrual Adjustment | [1] |  |  |  |  |  |  |  |  | 2 | 3 |
Restructuring Reserve, Translation Adjustment |  |  |  |  |  |  |  |  |  | 4 | (7) |
Restructuring Reserve |  | 34 |  |  |  | 66 |  |  |  | 34 | 66 | 0
Restructuring Charges, Rollforward |  |  |  |  |  |  |  |  |  | $ 1 | 141 |
Number of Future Shop stores converted to Best Buy stores | store |  |  |  |  |  |  |  |  |  | 65 |  |
Employee Severance [Member] | Restructuring Program Canadian Brand Consolidation [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Payments for Restructuring |  |  |  |  |  |  |  |  |  | $ (2) | (24) |
Restructuring Reserve, Accrual Adjustment | [1] |  |  |  |  |  |  |  |  | 0 | (2) |
Restructuring Reserve, Translation Adjustment |  |  |  |  |  |  |  |  |  | 0 | 0 |
Restructuring Reserve |  | 0 |  |  |  | 2 |  |  |  | 0 | 2 | 0
Restructuring Charges, Rollforward |  |  |  |  |  |  |  |  |  | 0 | 28 |
Facility Closing [Member] | Restructuring Program Canadian Brand Consolidation [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Payments for Restructuring |  |  |  |  |  |  |  |  |  | (37) | (47) |
Restructuring Reserve, Accrual Adjustment | [1] |  |  |  |  |  |  |  |  | 2 | 5 |
Restructuring Reserve, Translation Adjustment |  |  |  |  |  |  |  |  |  | 4 | (7) |
Restructuring Reserve |  | $ 34 |  |  |  | $ 64 |  |  |  | 34 | 64 | 0
Restructuring Charges, Rollforward |  |  |  |  |  |  |  |  |  | 1 | 113 |
Continuing Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  |  | 39 | 201 | 5
Restructuring charges |  |  |  |  |  |  |  |  |  | 39 | 201 |
Continuing Operations [Member] | Restructuring Program Canadian Brand Consolidation [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  |  | 200 |  |
Continuing Operations [Member] | International [Member] | Restructuring Program Canadian Brand Consolidation [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  |  | 3 | 200 | $ 0
Restructuring charges |  |  |  |  |  |  |  |  |  |  | 200 |
Continuing Operations [Member] | International [Member] | Inventory write-downs [Member] | Restructuring Program Canadian Brand Consolidation [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  |  | 0 | 3 |
Continuing Operations [Member] | International [Member] | Property and equipment write-downs [Member] | Restructuring Program Canadian Brand Consolidation [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  |  | 0 | 30 |
Continuing Operations [Member] | International [Member] | Tradename Impairment [Member] | Restructuring Program Canadian Brand Consolidation [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  |  | 0 | 40 |
Continuing Operations [Member] | International [Member] | Employee Severance [Member] | Restructuring Program Canadian Brand Consolidation [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  |  | 0 | 25 |
Continuing Operations [Member] | International [Member] | Facility Closing [Member] | Restructuring Program Canadian Brand Consolidation [Member] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  |  | $ 3 | $ 102 |
[1] | (1) The adjustments related to termination benefits relate to higher-than-expected employee retention. Adjustments to facility closure and other costs represent changes in sublease assumptions.

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