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Restructuring Charges Restructuring Accrual Activity (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
May 02, 2015 USD ($) store | Feb. 03, 2018 USD ($) store | Jan. 28, 2017 USD ($) | Jan. 30, 2016 USD ($)
Restructuring Program Renew Blue Phase 2 [Member] | Employee Severance [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Restructuring reserve, balance at beginning of period |  |  | $ 0 | $ 0 |
Charges |  |  |  | 19 |
Cash payments |  |  |  | (17) |
Adjustments |  |  |  | (2) |
Restructuring reserve, balance at end of period |  |  |  | 0 | $ 0
Restructuring Program Best Buy Mobile [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Number of Stores to be Closed | store |  |  | 257 |  |
Restructuring Program Best Buy Mobile [Member] | Employee Severance [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Restructuring reserve, balance at end of period |  |  | $ 8 |  |
Restructuring Program Best Buy Mobile [Member] | Facility Closing [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Restructuring reserve, balance at end of period |  |  | 0 |  |
Restructuring Program 2013 Renew Blue [Member] [Domain] | Employee Severance [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Restructuring reserve, balance at end of period |  |  | 0 |  |
Restructuring Program 2013 Renew Blue [Member] [Domain] | Facility Closing [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Restructuring reserve, balance at end of period |  |  | 11 |  |
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 beginning of period |  | $ 0 | 34 | 66 | 0
Charges |  |  | 0 | 1 | 141
Cash payments |  |  | (18) | (39) | 71
Adjustments | [1] |  | (2) | 2 | 3
Changes in foreign currency exchange rates |  |  | 1 | 4 | (7)
Restructuring reserve, balance at end of period |  |  | 15 | 34 | 66
Restructuring Program Canadian Brand Consolidation [Member] | Employee Severance [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Restructuring reserve, balance at beginning of period |  | 0 | 0 | 2 | 0
Charges |  |  | 0 | 0 | 28
Cash payments |  |  | 0 | (2) | 24
Adjustments | [1] |  | 0 | 0 | (2)
Changes in foreign currency exchange rates |  |  | 0 | 0 | 0
Restructuring reserve, balance at end of period |  |  | 0 | 0 | 2
Restructuring Program Canadian Brand Consolidation [Member] | Facility Closing [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Restructuring reserve, balance at beginning of period |  | $ 0 | 34 | 64 | 0
Charges |  |  | 0 | 1 | 113
Cash payments |  |  | (18) | (37) | 47
Adjustments | [1] |  | (2) | 2 | 5
Changes in foreign currency exchange rates |  |  | 1 | 4 | (7)
Restructuring reserve, balance at end of period |  |  | $ 15 | $ 34 | $ 64
[1] | djustments related to termination benefits relate to higher-than-expected employee retention. Adjustments related to facility closure and other costs represent changes in sublease assumptions.

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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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