Debt Instrument, Basis Spread on Federal Funds Rate

No definition available.

Name:	bby_DebtInstrumentBasisSpreadOnFederalFundsRate
Namespace Prefix:	bby_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Basis Spread on Libor

+ References

No definition available.

+ Details

Name:	bby_DebtInstrumentBasisSpreadOnLibor
Namespace Prefix:	bby_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The maximum percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	bby_DebtInstrumentBasisSpreadOnVariableRateHighEndOfRange
Namespace Prefix:	bby_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The minimum percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	bby_DebtInstrumentBasisSpreadOnVariableRateLowEndOfRange
Namespace Prefix:	bby_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, High End of the Range, Utilization Fee

+ References

No definition available.

+ Details

Name:	bby_DebtInstrumentHighEndOfRangeUtilizationFee
Namespace Prefix:	bby_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Higher Range on Annual Base Rate

+ References

No definition available.

+ Details

Name:	bby_DebtInstrumentHigherRangeOnAnnualBaseRate
Namespace Prefix:	bby_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Higher Range on Facility Fee

+ References

No definition available.

+ Details

Name:	bby_DebtInstrumentHigherRangeOnFacilityFee
Namespace Prefix:	bby_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Low End of the Range, Utilization Fee

+ References

No definition available.

+ Details

Name:	bby_DebtInstrumentLowEndOfRangeUtilizationFee
Namespace Prefix:	bby_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Lower Range on Annual Base Rate

+ References

No definition available.

+ Details

Name:	bby_DebtInstrumentLowerRangeOnAnnualBaseRate
Namespace Prefix:	bby_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Lower Range on Facility Fee

+ References

No definition available.

+ Details

Name:	bby_DebtInstrumentLowerRangeOnFacilityFee
Namespace Prefix:	bby_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line of Credit Facility, Letter of Credit Sublimit

+ References

No definition available.

+ Details

Name:	bby_LineOfCreditFacilityLetterOfCreditSublimit
Namespace Prefix:	bby_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the applicable margin on the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	bby_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentageOfApplicableMargin
Namespace Prefix:	bby_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
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 FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.13)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: 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 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.(a),16(a)(1))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 13

-Article 9

-Subparagraph 2, 3

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 7

-Section 03

-Paragraph 16

-Subparagraph a(1)

+ Details

Name:	us-gaap_ShortTermBorrowings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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

Debt (Details) In Millions, unless otherwise specified																	9 Months Ended
Debt (Details) In Millions, unless otherwise specified	Nov. 26, 2011 USD ($)	Feb. 26, 2011 USD ($)	Nov. 27, 2010 USD ($)	Nov. 26, 2011 Us revolving credit facility USD ($)	Nov. 26, 2011 U.S. revolving credit facility - 364-Day USD ($)	Oct. 31, 2011 U.S. revolving credit facility - 364-Day USD ($)	Feb. 26, 2011 U.S. revolving credit facility - 364-Day USD ($)	Nov. 27, 2010 U.S. revolving credit facility - 364-Day USD ($)	Nov. 26, 2011 U.S. revolving credit facility - Five-Year USD ($)	Oct. 31, 2011 U.S. revolving credit facility - Five-Year USD ($)	Feb. 26, 2011 U.S. revolving credit facility - Five-Year USD ($)	Nov. 27, 2010 U.S. revolving credit facility - Five-Year USD ($)	Nov. 26, 2011 JPMorgan revolving credit facility USD ($)	Oct. 31, 2011 JPMorgan revolving credit facility USD ($)	Feb. 26, 2011 JPMorgan revolving credit facility USD ($)	Nov. 27, 2010 JPMorgan revolving credit facility USD ($)	Nov. 26, 2011 New Europe revolving credit facility USD ($)	Nov. 26, 2011 New Europe revolving credit facility GBP (£)	Feb. 26, 2011 New Europe revolving credit facility USD ($)	Nov. 27, 2010 New Europe revolving credit facility USD ($)	Nov. 26, 2011 Europe receivables financing facility USD ($)	Nov. 26, 2011 Europe receivables financing facility GBP (£)	Feb. 26, 2011 Europe receivables financing facility USD ($)	Nov. 27, 2010 Europe receivables financing facility USD ($)	Nov. 26, 2011 Europe revolving credit facility USD ($)	Nov. 26, 2011 Europe revolving credit facility GBP (£)	Feb. 26, 2011 Europe revolving credit facility USD ($)	Nov. 27, 2010 Europe revolving credit facility USD ($)	Nov. 26, 2011 Canada revolving demand facility USD ($)	Feb. 26, 2011 Canada revolving demand facility USD ($)	Nov. 27, 2010 Canada revolving demand facility USD ($)	Nov. 26, 2011 China revolving demand facilities USD ($)	Feb. 26, 2011 China revolving demand facilities USD ($)	Nov. 27, 2010 China revolving demand facilities USD ($)
Short-term Debt
Short-term debt	$ 163	$ 557	$ 690		$ 0		$ 0	$ 0	$ 0		$ 0	$ 0	$ 0		$ 0	$ 500	$ 155		$ 0	$ 0	$ 0		$ 455	$ 136	$ 0		$ 98	$ 0	$ 0	$ 0	$ 0	$ 8	$ 4	$ 54
Line of credit facility, current borrowing capacity				2,500		1,000				1,500				2,300			623	400								125
Line of credit facility, maximum borrowing capacity				3,000																		350
Line of credit facility, letter of credit sublimit				$ 300
Debt instrument, basis spread on federal funds rate (as a percent)				0.50%
Debt instrument, basis spread on LIBOR (as a percent)				1.00%
Debt instrument, lower range on ABR (as a percent)					0.00%				0.00%
Debt instrument, higher range on ABR (as a percent)					0.525%				0.475%
Debt instrument, low end of the range, utilization fee (as a percent)																	0.00%	0.00%
Debt instrument, high end of the range, utilization fee (as a percent)																	0.50%	0.50%
LIBOR margin, low end of the range (as a percent)					0.925%				0.875%
LIBOR margin, high end of the range (as a percent)					1.525%				1.475%
Debt instrument, lower range on facility fee (as a percent)					0.075%				0.125%
Debt instrument, higher range on facility fee (as a percent)					0.225%				0.275%
Line of credit facility, unused capacity, commitment fee percentage of applicable margin (as a percent)																	40.00%	40.00%
Initial commitment fee (as a percent)																	0.75%	0.75%