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Restructuring Charges Composition of Restructuring Charges (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Aug. 04, 2018 | Jul. 29, 2017 | Aug. 04, 2018 | Jul. 29, 2017
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
Restructuring and Related Cost, Cost Incurred to Date | 56 |  | 56 |
Best Buy Mobile | Property and equipment impairments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 0 |  | 0 |
Restructuring and Related Cost, Cost Incurred to Date | 1 |  | 1 |
Best Buy Mobile | Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 3 |  | 2 |
Restructuring and Related Cost, Cost Incurred to Date | 6 |  | 6 |
Best Buy Mobile | Facility closure and other costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 20 |  | 49 |
Restructuring and Related Cost, Cost Incurred to Date | $ 49 |  | $ 49 |

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- Definition Amount of costs incurred to date for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(d)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(1)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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