Goodwill and Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	8 Months Ended	9 Months Ended
	Nov. 03, 2012	Nov. 02, 2013		Feb. 02, 2013
Goodwill [Roll Forward]
Goodwill, Balance at the beginning of the period	$ 1,335	$ 528
Goodwill, Changes in foreign currency exchange rates	(5)	0
Goodwill, Sale of Best Buy Europe		0
Goodwill, Impairments		0
Goodwill, Acquisitions	14
Goodwill, Balance at the end of the period	1,344	528
Indefinite-lived Tradenames [Roll Forward]
Indefinite-lived Tradenames, Beginning balance	131	131
Indefinite-lived Tradenames, Changes in foreign currency exchange rates, Tradenames	0	(2)
Indefinite-lived Tradenames, Sale of Best Buy Europe		(22)
Indefinite-lived Tradenames, Impairments		(4)
Indefinite-lived Tradenames, Acquisitions	0
Indefinite-lived Tradenames, Ending balance	131	103
Gross amount of goodwill and the accumulated goodwill impairment losses
Gross Carrying Amount	2,605	1,412	[1]	2,608
Cumulative Impairment	(1,261)	(884)	[1]	(2,080)
Domestic [Member]
Goodwill [Roll Forward]
Goodwill, Balance at the beginning of the period	516	528
Goodwill, Changes in foreign currency exchange rates	0	0
Goodwill, Sale of Best Buy Europe		0
Goodwill, Impairments		0
Goodwill, Acquisitions	14
Goodwill, Balance at the end of the period	530	528
Indefinite-lived Tradenames [Roll Forward]
Indefinite-lived Tradenames, Beginning balance	19	19
Indefinite-lived Tradenames, Changes in foreign currency exchange rates, Tradenames	0	0
Indefinite-lived Tradenames, Sale of Best Buy Europe		0
Indefinite-lived Tradenames, Impairments		0
Indefinite-lived Tradenames, Acquisitions	0
Indefinite-lived Tradenames, Ending balance	19	19
International [Member]
Goodwill [Roll Forward]
Goodwill, Balance at the beginning of the period	819	0
Goodwill, Changes in foreign currency exchange rates	(5)	0
Goodwill, Sale of Best Buy Europe		0
Goodwill, Impairments		0
Goodwill, Acquisitions	0
Goodwill, Balance at the end of the period	814	0
Indefinite-lived Tradenames [Roll Forward]
Indefinite-lived Tradenames, Beginning balance	112	112
Indefinite-lived Tradenames, Changes in foreign currency exchange rates, Tradenames	0	(2)
Indefinite-lived Tradenames, Sale of Best Buy Europe		(22)
Indefinite-lived Tradenames, Impairments		(4)
Indefinite-lived Tradenames, Acquisitions	0
Indefinite-lived Tradenames, Ending balance	$ 112	$ 84

[1] (1) Excludes the gross carrying amount and cumulative impairment related to Best Buy Europe, which was sold during the quarter ended August 3, 2013.