XML 104 R84.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jan. 28, 2017 | Jan. 30, 2016 | Jan. 31, 2015
Activity in valuation and qualifying accounts |  |  |  |
Balance at Beginning of Period |  | $ 49 |  |
Balance at End of Period |  | 52 | $ 49 |
Allowance for Doubtful Accounts [Member] |  |  |  |
Activity in valuation and qualifying accounts |  |  |  |
Balance at Beginning of Period |  | 49 | 59 | $ 104
Charged to Expenses or Other Accounts |  | 44 | 30 | 1
Other | [1] | (41) | (40) | (46)
Balance at End of Period |  | $ 52 | $ 49 | $ 59
[1] | Includes bad debt write-offs and recoveries, acquisitions and the effect of foreign currency fluctuations.

X
- Definition Valuation Allowances and Reserves, Other + References No definition available. + Details
Name: | bby_ValuationAllowancesAndReservesOther
Namespace Prefix: | bby_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_MovementInValuationAllowancesAndReservesRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
Name: | us-gaap_ValuationAllowancesAndReservesBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of increase in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from charges to costs and expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
Name: | us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_ValuationAllowancesAndReservesTypeAxis=us-gaap_AllowanceForDoubtfulAccountsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |