Condensed Consolidating Financial Information (Details 3) (USD $) In Millions	3 Months Ended		6 Months Ended
	Aug. 27, 2011	Aug. 28, 2010	Aug. 27, 2011	Aug. 28, 2010
Revenue	$ 11,347	$ 11,339	$ 22,287	$ 22,126
Cost of goods sold	8,475	8,421	16,647	16,415
Gross profit	2,872	2,918	5,640	5,711
Selling, general and administrative expenses	2,583	2,507	5,067	4,987
Restructuring charges	2	0	4	0
Operating income (loss)	287	411	569	724
Other income (expense)
Investment income and other	6	13	18	25
Interest expense	(34)	(21)	(65)	(44)
Earnings (loss) before equity in earnings (loss) of subsidiaries	259	403	522	705
Equity in earnings (loss) of subsidiaries	0	0	0	0
Earnings (loss) before income tax expense and equity in loss of affiliates	259	403	522	705
Income tax expense (benefit)	99	146	198	267
Equity in loss of affiliates	0	0	(1)	0
Net earnings (loss) including noncontrolling interests	160	257	323	438
Net loss (earnings) attributable to noncontrolling interests	17	(3)	(10)	(29)
Net earnings (loss) attributable to Best Buy Co., Inc.	177	254	313	409
Best Buy Co., Inc.
Revenue	4	4	8	8
Cost of goods sold	0	0	0	0
Gross profit	4	4	8	8
Selling, general and administrative expenses	37	34	73	71
Restructuring charges	0		0
Operating income (loss)	(33)	(30)	(65)	(63)
Other income (expense)
Investment income and other	6	11	10	19
Interest expense	(23)	(11)	(46)	(23)
Earnings (loss) before equity in earnings (loss) of subsidiaries	(50)	(30)	(101)	(67)
Equity in earnings (loss) of subsidiaries	175	248	320	382
Earnings (loss) before income tax expense and equity in loss of affiliates	125	218	219	315
Income tax expense (benefit)	(2)	12	3	(6)
Equity in loss of affiliates	0		0
Net earnings (loss) including noncontrolling interests	127	206	216	321
Net loss (earnings) attributable to noncontrolling interests	0	0	0	0
Net earnings (loss) attributable to Best Buy Co., Inc.	127	206	216	321
Guarantor Subsidiary
Revenue	7,591	7,780	14,799	15,075
Cost of goods sold	5,625	5,739	10,998	11,119
Gross profit	1,966	2,041	3,801	3,956
Selling, general and administrative expenses	1,890	1,970	3,655	3,806
Restructuring charges	0		(2)
Operating income (loss)	76	71	148	150
Other income (expense)
Investment income and other	0	0	0	0
Interest expense	(3)	(3)	(6)	(6)
Earnings (loss) before equity in earnings (loss) of subsidiaries	73	68	142	144
Equity in earnings (loss) of subsidiaries	9	27	18	23
Earnings (loss) before income tax expense and equity in loss of affiliates	82	95	160	167
Income tax expense (benefit)	25	(41)	49	53
Equity in loss of affiliates	0		0
Net earnings (loss) including noncontrolling interests	57	136	111	114
Net loss (earnings) attributable to noncontrolling interests	0	0	0	0
Net earnings (loss) attributable to Best Buy Co., Inc.	57	136	111	114
Non-Guarantor Subsidiaries
Revenue	9,810	10,162	20,169	20,697
Cost of goods sold	8,381	8,674	17,368	17,756
Gross profit	1,429	1,488	2,801	2,941
Selling, general and administrative expenses	1,233	1,166	2,406	2,392
Restructuring charges	2		6
Operating income (loss)	194	322	389	549
Other income (expense)
Investment income and other	5	14	17	25
Interest expense	(13)	(19)	(22)	(34)
Earnings (loss) before equity in earnings (loss) of subsidiaries	186	317	384	540
Equity in earnings (loss) of subsidiaries	48	109	93	91
Earnings (loss) before income tax expense and equity in loss of affiliates	234	426	477	631
Income tax expense (benefit)	76	175	146	220
Equity in loss of affiliates	0		(1)
Net earnings (loss) including noncontrolling interests	158	251	330	411
Net loss (earnings) attributable to noncontrolling interests	17	(3)	(10)	(29)
Net earnings (loss) attributable to Best Buy Co., Inc.	175	248	320	382
Eliminations
Revenue	(6,058)	(6,607)	(12,689)	(13,654)
Cost of goods sold	(5,531)	(5,992)	(11,719)	(12,460)
Gross profit	(527)	(615)	(970)	(1,194)
Selling, general and administrative expenses	(577)	(663)	(1,067)	(1,282)
Restructuring charges	0		0
Operating income (loss)	50	48	97	88
Other income (expense)
Investment income and other	(5)	(12)	(9)	(19)
Interest expense	5	12	9	19
Earnings (loss) before equity in earnings (loss) of subsidiaries	50	48	97	88
Equity in earnings (loss) of subsidiaries	(232)	(384)	(431)	(496)
Earnings (loss) before income tax expense and equity in loss of affiliates	(182)	(336)	(334)	(408)
Income tax expense (benefit)	0	0	0	0
Equity in loss of affiliates	0		0
Net earnings (loss) including noncontrolling interests	(182)	(336)	(334)	(408)
Net loss (earnings) attributable to noncontrolling interests	0	0	0	0
Net earnings (loss) attributable to Best Buy Co., Inc.	$ (182)	$ (336)	$ (334)	$ (408)