Condensed Consolidating Financial Information (Details 3) (USD $) In Millions	3 Months Ended
	May 28, 2011	May 29, 2010
Revenue	$ 10,940	$ 10,787
Cost of goods sold	8,172	7,994
Gross profit	2,768	2,793
Selling, general and administrative expenses	2,484	2,480
Restructuring charges	2
Operating (loss) income	282	313
Other income (expense)
Investment income and other	12	12
Interest expense	(31)	(23)
(Loss) earnings before equity in earnings (loss) of subsidiaries	263	302
Earnings before income tax expense and equity in loss of affiliates	263	302
Income tax (benefit) expense	99	121
Equity in loss of affiliates	(1)
Net earnings including noncontrolling interests	163	181
Net earnings attributable to noncontrolling interests	(27)	(26)
Net earnings attributable to Best Buy Co., Inc.	136	155
Best Buy Co., Inc.
Revenue	4	4
Gross profit	4	4
Selling, general and administrative expenses	36	37
Operating (loss) income	(32)	(33)
Other income (expense)
Investment income and other	4	8
Interest expense	(23)	(12)
(Loss) earnings before equity in earnings (loss) of subsidiaries	(51)	(37)
Equity in earnings (loss) of subsidiaries	145	134
Earnings before income tax expense and equity in loss of affiliates	94	97
Income tax (benefit) expense	5	(18)
Net earnings including noncontrolling interests	89	115
Net earnings attributable to Best Buy Co., Inc.	89	115
Guarantor Subsidiary
Revenue	7,208	7,295
Cost of goods sold	5,373	5,380
Gross profit	1,835	1,915
Selling, general and administrative expenses	1,765	1,836
Restructuring charges	(2)
Operating (loss) income	72	79
Other income (expense)
Interest expense	(3)	(3)
(Loss) earnings before equity in earnings (loss) of subsidiaries	69	76
Equity in earnings (loss) of subsidiaries	9	(4)
Earnings before income tax expense and equity in loss of affiliates	78	72
Income tax (benefit) expense	24	94
Net earnings including noncontrolling interests	54	(22)
Net earnings attributable to Best Buy Co., Inc.	54	(22)
Non-Guarantor Subsidiaries
Revenue	10,359	10,535
Cost of goods sold	8,987	9,082
Gross profit	1,372	1,453
Selling, general and administrative expenses	1,173	1,226
Restructuring charges	4
Operating (loss) income	195	227
Other income (expense)
Investment income and other	12	11
Interest expense	(9)	(15)
(Loss) earnings before equity in earnings (loss) of subsidiaries	198	223
Equity in earnings (loss) of subsidiaries	45	(18)
Earnings before income tax expense and equity in loss of affiliates	243	205
Income tax (benefit) expense	70	45
Equity in loss of affiliates	(1)
Net earnings including noncontrolling interests	172	160
Net earnings attributable to noncontrolling interests	(27)	(26)
Net earnings attributable to Best Buy Co., Inc.	145	134
Eliminations
Revenue	(6,631)	(7,047)
Cost of goods sold	(6,188)	(6,468)
Gross profit	(443)	(579)
Selling, general and administrative expenses	(490)	(619)
Operating (loss) income	47	40
Other income (expense)
Investment income and other	(4)	(7)
Interest expense	4	7
(Loss) earnings before equity in earnings (loss) of subsidiaries	47	40
Equity in earnings (loss) of subsidiaries	(199)	(112)
Earnings before income tax expense and equity in loss of affiliates	(152)	(72)
Net earnings including noncontrolling interests	(152)	(72)
Net earnings attributable to Best Buy Co., Inc.	$ (152)	$ (72)