Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended		9 Months Ended
	Mar. 03, 2012	Nov. 02, 2013	Nov. 03, 2012	Nov. 02, 2013	Nov. 03, 2012
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Foreign Currency Translation, Beginning Balance	$ 77	$ 528	$ 87	$ 113	$ 77
Available-For-Sale Investments, Beginning Balance	(3)	1	(1)	(1)	(3)
Total, Beginning Balance	74	529	86	112	74
Foreign currency translation adjustments				(106)
Reclassification of foreign currency translation adjustments into earnings		0	0	654	0
Unrealized gains on available-for-sale investments	0	1	0	1	3
Reclassification of losses on available-for-sale investments into earnings		0	0	2	0
Adjustment for fiscal year change	(16)
Foreign Currency Translation, Ending Balance	93	526	105	526	105
Available-For-Sale Investments, Ending Balance	(3)	2	0	2	0
Total, Ending Balance	90	528	105	528	105
Best Buy Co., Inc. [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Foreign currency translation adjustments		(2)	18	(95)	28
Reclassification of foreign currency translation adjustments into earnings				508
Unrealized gains on available-for-sale investments		1	1	2	3
Reclassification of losses on available-for-sale investments into earnings				$ 1