Discontinued Operations (Details) In Millions, unless otherwise specified	3 Months Ended					6 Months Ended
	Aug. 03, 2013 USD ($)		Aug. 03, 2013 GBP (£)	Aug. 04, 2012 USD ($)		Aug. 03, 2013 USD ($)		Aug. 04, 2012 USD ($)		May 04, 2013 USD ($)	Feb. 02, 2013 USD ($)	Jan. 28, 2012 USD ($)	Jun. 26, 2013 Best Buy Europe [Member] USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses	$ 526		£ 341
Dollar Amount of Shares Received from Divestiture of Business	123		80
Future Cash Consideration from Divestiture of Business, Due in One Year	39		25
Future Cash Consideration from Divestiture of Business, Due in Two Years	39		25
Interest Rate on Future Cash Consideration from Divestiture of Business	2.50%		2.50%
Revenue	1,252			1,209		2,682		2,453
Restructuring charges	47	[1]		(1)	[1]	100	[1]	5	[1]
Loss from discontinued operations before income tax benefit	(51)			(53)		(235)		(72)
Income tax benefit	38	[2]		17		24		20
Gain on sale of discontinued operations	24			0		52		0
Equity in loss of affiliates	0			(2)		0		(3)
Net gain (loss) from discontinued operations, including noncontrolling interests	11			(38)		(159)		(55)
Net loss from discontinued operations attributable to noncontrolling interests	18			19		10		25
Net gain (loss) from discontinued operations attributable to Best Buy Co., Inc. shareholders	29			(19)		(149)		(30)
Income Tax Benefit, Intraperiod Tax Allocation	27
Cash and cash equivalents	1,910			680		1,910		680		1,826	1,826	1,199	597
Receivables	1,188			2,135		1,188		2,135			2,704		1,295
Merchandise inventories	5,437			6,299		5,437		6,299			6,571		554
Other current assets	879			1,070		879		1,070			946		168
PROPERTY AND EQUIPMENT, NET	2,744			3,407		2,744		3,407			3,270		159
OTHER ASSETS	362			474		362		474			522		316
Assets	13,284			15,849		13,284		15,849			16,787		3,089
Accounts payable	4,968			6,055		4,968		6,055			6,951		790
Short-term debt	0			519		0		519			596		973
Other Liabilities, Current													1,145
LONG-TERM LIABILITIES	1,017			1,125		1,017		1,125			1,109		65
Liabilities													$ 2,973

[1] (1) See Note 6, Restructuring Charges, for further discussion of the restructuring charges associated with discontinued operations.

[2] (2) Income tax benefit for the three months ended August 3, 2013, includes a $27 million benefit related to a tax allocation between continuing and discontinued operations. The fiscal 2014 effective tax rate for discontinued operations differs from the statutory tax rate primarily due to the previously mentioned tax allocation, restructuring charges and the impairment of our investment in Best Buy Europe. The restructuring charges and impairment generally included no related tax benefit. The deferred tax assets related to the restructuring charges generally resulted in an increase in the valuation allowance in an equal amount, of which the investment impairment is not tax deductible.