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Restructuring Charges - Canadian Brand Consolidation (Details) $ in Millions | 3 Months Ended
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Apr. 29, 2017 USD ($) | Apr. 30, 2016 USD ($) | May 02, 2015 store
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring charges |  | $ 0 | $ 29 |
Restructuring Program Canadian Brand Consolidation [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Number of stores to be closed | store |  |  |  | 66
Number of Future Shop stores converted to Best Buy stores | store |  |  |  | 65
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve, balance at the beginning of the period |  | 34 | 66 |
Cash payments |  | (6) | (12) |
Adjustments | [1] |  | (1) |
Restructuring Reserve, Translation Adjustment |  | (1) | 6 |
Restructuring reserve, balance at the end of the period |  | 27 | 59 |
Restructuring Program Canadian Brand Consolidation [Member] | Termination benefits [Member] |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve, balance at the beginning of the period |  | 0 | 2 |
Cash payments |  | 0 | (1) |
Adjustments | [1] |  | 0 |
Restructuring Reserve, Translation Adjustment |  | 0 | 0 |
Restructuring reserve, balance at the end of the period |  | 0 | 1 |
Restructuring Program Canadian Brand Consolidation [Member] | Facility closure and other costs [Member] |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve, balance at the beginning of the period |  | 34 | 64 |
Cash payments |  | (6) | (11) |
Adjustments | [1] |  | (1) |
Restructuring Reserve, Translation Adjustment |  | (1) | 6 |
Restructuring reserve, balance at the end of the period |  | 27 | 58 |
Restructuring Program Canadian Brand Consolidation [Member] | Continuing Operations [Member] | International Segment [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring Charges |  | 0 | (1) |
Restructuring and Related Cost, Cost Incurred to Date |  | 203 |  |
Restructuring Program Canadian Brand Consolidation [Member] | Continuing Operations [Member] | International Segment [Member] | Inventory write-downs [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring Charges |  | 0 | 0 |
Restructuring and Related Cost, Cost Incurred to Date |  | 3 |  |
Restructuring Program Canadian Brand Consolidation [Member] | Continuing Operations [Member] | International Segment [Member] | Property and equipment impairments [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring Charges |  | 0 | 0 |
Restructuring and Related Cost, Cost Incurred to Date |  | 30 |  |
Restructuring Program Canadian Brand Consolidation [Member] | Continuing Operations [Member] | International Segment [Member] | Impairment of Intangible Assets Related to Restructuring [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring Charges |  | 0 | 0 |
Restructuring and Related Cost, Cost Incurred to Date |  | 40 |  |
Restructuring Program Canadian Brand Consolidation [Member] | Continuing Operations [Member] | International Segment [Member] | Termination benefits [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring Charges |  | 0 | 0 |
Restructuring and Related Cost, Cost Incurred to Date |  | 25 |  |
Restructuring Program Canadian Brand Consolidation [Member] | Continuing Operations [Member] | International Segment [Member] | Facility closure and other costs [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring Charges |  | 0 | $ (1) |
Restructuring and Related Cost, Cost Incurred to Date |  | $ 105 |  |
[1] | Adjustments to facility closure and other costs represent changes in sublease assumptions. Adjustments to termination benefits represent changes in retention assumptions.

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- Definition Number of Stores to be Closed + References No definition available. + Details
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- Definition Number of Future Shop stores converted to Best Buy stores + References No definition available. + Details
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- Definition Amount charged against earnings in the period for incurred and estimated costs, including inventory and non-inventory related costs, associated with restructurings pursuant to a program that is planned and controlled by management, and materially changes either the scope of a business undertaken by an entity, or the manner in which that business is conducted. + References No definition available. + Details
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- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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- Definition Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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