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Restructuring Charges Restructuring Accrual Activity (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
May 02, 2015 store | Jul. 29, 2017 USD ($) | Jul. 30, 2016 USD ($)
Restructuring Program Renew Blue Phase 2 [Member] | Termination benefits |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve, balance at the beginning of the period |  |  |  | $ 0
Charges |  |  |  | 19
Cash payments |  |  |  | (15)
Adjustments | [1] |  |  | (2)
Restructuring reserve, balance at the end of the period |  |  |  | 2
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
Charges |  |  | 0 | 1
Cash payments |  |  | (10) | (19)
Adjustments | [2] |  | (1) | (1)
Changes in foreign currency exchange rates |  |  | 1 | 4
Restructuring reserve, balance at the end of the period |  |  | 24 | 51
Restructuring Program Canadian Brand Consolidation [Member] | Termination benefits |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve, balance at the beginning of the period |  |  | 0 | 2
Charges |  |  | 0 | 0
Cash payments |  |  | 0 | (1)
Adjustments |  |  | 0 | 0
Changes in foreign currency exchange rates |  |  | 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
Charges |  |  | 0 | 1
Cash payments |  |  | (10) | (18)
Adjustments | [2] |  | (1) | (1)
Changes in foreign currency exchange rates |  |  | 1 | 4
Restructuring reserve, balance at the end of the period |  |  | $ 24 | $ 50
[1] | Adjustments to termination benefits represent changes in retention assumptions.
[2] | Adjustments to facility closure and other costs represent changes in sublease 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 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=98514028&loc=d3e3536-108585 + 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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- Definition Amount of increase (decrease) in the accrual for restructuring costs. + 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 + Details
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- Definition Amount of foreign currency translation gain (loss) which decreases (increases) the restructuring reserve. + 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)(2)) -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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