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Pretax gain (loss), not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

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Income tax expense or benefit attributable to Income or Loss from discontinued operations during the phase-out period.

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Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 03, 2012	Nov. 26, 2011	Aug. 27, 2011	May 28, 2011	Feb. 26, 2011	Nov. 27, 2010	Aug. 28, 2010	May 29, 2010	Mar. 03, 2012	Feb. 26, 2011	Feb. 27, 2010
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue									$ 411	$ 525	$ 451
Restructuring charges									229	75	0
Loss from discontinued operations before income tax benefit									(406)	(260)	(134)
Income tax benefit									89	57	33
Gain on disposal of discontinued operations									9	7	0
Income tax benefit on sale									0	8	0
Net loss from discontinued operations including noncontrolling interests	(108)	(127)	(37)	(36)	(104)	(40)	(17)	(27)	(308)	(188)	(101)
Net loss from discountinued operations attributable to noncontrolling interests									134	38	19
Net loss from discontinued operations									(174)	(150)	(82)
Domestic [Member] \| Speakeasy [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposal of discontinued operations							7
International [Member] \| Best Buy China [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of stores closed					8
International [Member] \| Best Buy Turkey [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposal of discontinued operations			4
Number of stores closed			2
International [Member] \| Best Buy U.K. [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of stores closed	11
International [Member] \| Belgium [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposal of discontinued operations									$ 5
Number of stores sold	82