Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

+ Details

Name:	us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

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

- Definition

Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

+ Details

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

- Definition

This element represents the cash inflow during the period from the sale of a component of the entity.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

+ Details

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

Derivative Instruments (Details) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended
	Aug. 03, 2013 GBP (£)	Aug. 02, 2014 USD ($)	Aug. 03, 2013 USD ($)	Aug. 02, 2014 Operating Expense [Member] Continuing Operations [Member] USD ($)	Aug. 03, 2013 Operating Expense [Member] Continuing Operations [Member] USD ($)	Aug. 02, 2014 Operating Expense [Member] Continuing Operations [Member] USD ($)	Aug. 03, 2013 Operating Expense [Member] Continuing Operations [Member] USD ($)	Aug. 03, 2013 Operating Expense [Member] Discontinued Operations [Member] USD ($)	Aug. 03, 2013 Operating Expense [Member] Discontinued Operations [Member] USD ($)	Aug. 02, 2014 Not Designated as Hedging Instrument [Member] Continuing Operations [Member] USD ($)	Feb. 01, 2014 Not Designated as Hedging Instrument [Member] Continuing Operations [Member] USD ($)	Aug. 03, 2013 Not Designated as Hedging Instrument [Member] Continuing Operations [Member] USD ($)	Aug. 03, 2013 Not Designated as Hedging Instrument [Member] Discontinued Operations [Member] GBP (£)	Feb. 28, 2009 Best Buy Europe [Member]
Derivatives, Fair Value [Line Items]
Contract term		12 months
Notional Amount										$ 95	$ 157	$ 123	£ 455
Gain (loss) on foreign currency derivative instruments not designated as hedging instruments				(1)	5	(4)	6	3	(2)
Business Acquisition, Percentage of Voting Interests Acquired														50.00%
Proceeds from divestiture of businesses	£ 471	$ 37	$ 67