Amount, in pounds, of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 22
-Article 5

+ Details

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

- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19
-Subparagraph a
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 13
-Subparagraph 2, 3
-Article 9

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Subparagraph a(1)
-Article 7

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Debt (Details) In Millions	May 28, 2011 USD ($)	Feb. 26, 2011 USD ($)	May 29, 2010 USD ($)	May 28, 2011 Europe receivables financing facility USD ($)	Feb. 26, 2011 Europe receivables financing facility USD ($)	May 29, 2010 Europe receivables financing facility USD ($)	May 28, 2011 Europe receivables financing facility Best Buy Europe USD ($)	May 28, 2011 Europe receivables financing facility Best Buy Europe GBP (£)	Feb. 26, 2011 Europe revolving credit facility USD ($)	May 28, 2011 China revolving demand facilities USD ($)	Feb. 26, 2011 China revolving demand facilities USD ($)	May 29, 2010 China revolving demand facilities USD ($)
Short-term Debt
Short-term debt	$ 39	$ 557	$ 197	$ 24	$ 455	$ 178			$ 98	$ 15	$ 4	$ 19
Line of Credit Facility, Current Borrowing Capacity							319
Line of Credit Facility, Current Borrowing Capacity, In Pounds								£ 199