Represents the price at which debt instrument may be redeemed, as a percentage of principal amount of debt instrument.

Name:	bby_DebtInstrumentRedemptionPriceAsPercentageOfPrincipalAmount
Namespace Prefix:	bby
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ Details

Name:	bby_LongTermDebtFairValue
Namespace Prefix:	bby
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	bby_LongTermDebtLineItems
Namespace Prefix:	bby
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of the principal amount at which note holders can require the entity to redeem outstanding debt in the event of a change in control triggering event.

+ Details

Name:	bby_LongTermDebtRedemptionPriceControlTriggeringEvent
Namespace Prefix:	bby
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

+ Details

Name:	bby_ProceedsFromDebtNetOfIssuanceCosts
Namespace Prefix:	bby
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This element represents the underwriting discount on the issuance of debt.

+ Details

Name:	bby_UnderwritingDiscountOnIssuanceOfDebt
Namespace Prefix:	bby
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 21
-Paragraph 16, 20

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Interest rate stated in the contractual debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Article 7

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Article 9

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20, 22
-Article 5

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year or the normal operating cycle, if longer plus capital lease obligations due to be paid more than one year after the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 6
-Section H

+ Details

Name:	us-gaap_LongTermDebtAndCapitalLeaseObligations
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Total of the portions of the carrying amounts as of the balance sheet date of long-term debt, which may include notes payable, bonds payable, debentures, mortgage loans, and commercial paper, which are scheduled to be repaid within one year or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19
-Article 5

+ Details

Name:	us-gaap_LongTermDebtCurrent
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Debt (Details 2) (USD $) In Millions, unless otherwise specified				1 Months Ended	3 Months Ended
	May 28, 2011	Feb. 26, 2011	May 29, 2010	Mar. 31, 2011 2016 and 2021 Notes	May 28, 2011 2016 and 2021 Notes	May 28, 2011 2021 Notes	Mar. 31, 2011 2021 Notes	May 28, 2011 2016 Notes	Mar. 31, 2011 2016 Notes	May 28, 2011 2013 Notes	Feb. 26, 2011 2013 Notes	May 29, 2010 2013 Notes	May 28, 2011 Convertible debentures	Feb. 26, 2011 Convertible debentures	May 29, 2010 Convertible debentures	May 28, 2011 Financing Lease Obligations	Feb. 26, 2011 Financing Lease Obligations	May 29, 2010 Financing Lease Obligations	May 28, 2011 Capital Lease Obligations	Feb. 26, 2011 Capital Lease Obligations	May 29, 2010 Capital Lease Obligations	May 28, 2011 Other debt	Feb. 26, 2011 Other debt	May 29, 2010 Other debt
Long-term Debt.
Total long-term debt	$ 2,141	$ 1,152	$ 1,127			$ 648		$ 349		$ 500	$ 500	$ 500	$ 402	$ 402	$ 402	$ 164	$ 170	$ 178	$ 76	$ 79	$ 45	$ 2	$ 1	$ 2
Less: current portion	(441)	(441)	(34)										(402)	(402)
Total long-term debt, less current portion	1,700	711	1,093
Long-term debt, fair value	2,222	1,210	1,217
Debt instrument issued, principal amount							650		350
Interest rate (as a percent)						5.50%		3.75%
Underwriting discounts				6
Net proceeds from the sale of the Notes				$ 990
Redemption price, as percentage of principal amount of debt instrument (as a percent)					100.00%
Redemption price upon control triggering event, percentage of principal amount (as a percent)					101.00%