Amount of damages found by the jury in regards to the legal matter.

No definition available.

Name:	bby_DamagesValue
Namespace Prefix:	bby_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Future cash to be received for the settlement of litigation during the current period.

+ References

No definition available.

+ Details

Name:	bby_FutureProceedsfromLegalSettlements
Namespace Prefix:	bby_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the maximum amount of plaintiffs' attorneys' fees and costs payment made to plaintiffs' attorneys as per proposed settlement terms.

+ References

No definition available.

+ Details

Name:	bby_LossContingencySettlementAgreementConsiderationAttorneysAmount
Namespace Prefix:	bby_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the amount of settlement payment to be made to plaintiffs as per proposed settlement terms.

+ References

No definition available.

+ Details

Name:	bby_LossContingencySettlementAgreementConsiderationPlaintiffAmount
Namespace Prefix:	bby_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

Name:	us-gaap_LegalFees
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

+ References

No definition available.

+ Details

Name:	us-gaap_LitigationSettlementAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Cash received for the settlement of litigation during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

+ Details

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Contingencies Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		1 Months Ended
	Aug. 03, 2013	Sep. 03, 2013	Dec. 31, 2012 Pending Litigation [Member]	Nov. 30, 2012 Pending Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingency, Settlement Agreement Consideration, Plaintiff Amount			$ 5	$ 22
Loss Contingency, Settlement Agreement Consideration, Attorneys Amount			6
Litigation Settlement, Amount	264
Legal Fees	35
Proceeds from Legal Settlements	38
Future Proceeds from Legal Settlements	226
Loss Contingency, Damages Awarded, Value		$ 7.5