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

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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

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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

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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

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of unrealized gain related to the increase in fair value of foreign currency exchange rate derivatives designated as cash flow hedging instruments. Recorded in accumulated other comprehensive income to the extent that the cash flow hedge is determined to be effective.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (b)

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

+ Details

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Balance Type:	credit
Period Type:	duration

Derivative Instruments (Details) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended
	Nov. 02, 2013 GBP (£)	Nov. 01, 2014 USD ($)	Nov. 02, 2013 USD ($)	Nov. 01, 2014 Operating Expense [Member] Continuing Operations [Member] USD ($)	Nov. 02, 2013 Operating Expense [Member] Continuing Operations [Member] USD ($)	Nov. 01, 2014 Operating Expense [Member] Continuing Operations [Member] USD ($)	Nov. 02, 2013 Operating Expense [Member] Continuing Operations [Member] USD ($)	Nov. 02, 2013 Operating Expense [Member] Discontinued Operations [Member] USD ($)	Nov. 02, 2013 Operating Expense [Member] Discontinued Operations [Member] USD ($)	Feb. 28, 2009 Best Buy Europe [Member]	Nov. 01, 2014 Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] Continuing Operations [Member] USD ($)	Nov. 01, 2014 Designated as Hedging Instrument [Member] Continuing Operations [Member] USD ($)	Nov. 01, 2014 Not Designated as Hedging Instrument [Member] Continuing Operations [Member] USD ($)	Feb. 01, 2014 Not Designated as Hedging Instrument [Member] Continuing Operations [Member] USD ($)	Nov. 02, 2013 Not Designated as Hedging Instrument [Member] Continuing Operations [Member] USD ($)	Nov. 02, 2013 Not Designated as Hedging Instrument [Member] Discontinued Operations [Member] GBP (£)
Derivatives, Fair Value [Line Items]
Contract term												12 months	12 months
Notional Amount												$ 106	$ 111	$ 157	$ 138	£ 455
Unrealized Gain on Foreign Currency Derivatives, before Tax											1
Gain (loss) on foreign currency derivative instruments not designated as hedging instruments				4	(3)	0	3	0	(2)
Business Acquisition, Percentage of Voting Interests Acquired										50.00%
Proceeds from divestiture of businesses	£ 471	$ 38	$ 67