Summary of Significant Accounting Policies - Goodwill & Indefinite Intangible (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	11 Months Ended			12 Months Ended
	Aug. 30, 2008	Feb. 02, 2013		Jan. 28, 2012	Feb. 01, 2014		Mar. 03, 2012		Feb. 26, 2011
Goodwill [Roll Forward]
Goodwill, balance at the beginning of the period		$ 1,335		$ 2,454	$ 528		$ 2,454
Goodwill acquisitions	1,500	15	[1]				94	[2]
Goodwill impairments		822		0	0		0
Goodwill written off related to sale of business					103	[3]	7
Goodwill changes in foreign currency exchange rates		0			0		1
Goodwill other							0
Goodwill, balance at the end of the period		528			425		1,335
Indefinite-lived Intangible Assets [Roll Forward]
Indefinite-Lived Intangible Assets (Excluding Goodwill)		131			101		130		105
Intangible acquisitions		0					1
Tradename, impairments		0			4		0
Intangible written off related to sale of business					22	[3]	5
Intangible changes in foreign currency exchange rates		1			(4)		1
Intangible other							28	[4]
Goodwill, Gross		2,608			1,308	[5]
Cumulative Impairment		(2,080)			(883)	[5]
International [Member]
Goodwill [Roll Forward]
Goodwill, balance at the beginning of the period		819		2,032	0		2,032
Goodwill acquisitions		0					0
Goodwill impairments		819			0		1,200
Goodwill written off related to sale of business					0		7
Goodwill changes in foreign currency exchange rates		0			0		1
Goodwill other							0
Goodwill, balance at the end of the period		0			0		819
Indefinite-lived Intangible Assets [Roll Forward]
Indefinite-Lived Intangible Assets (Excluding Goodwill)		112			82		111		84
Intangible acquisitions		0					0
Tradename, impairments		0			4		0
Intangible written off related to sale of business					22	[3]	2
Intangible changes in foreign currency exchange rates		1			(4)		1
Intangible other							28	[4]
Domestic Segment [Member]
Goodwill [Roll Forward]
Goodwill, balance at the beginning of the period		516		422	528		422
Goodwill acquisitions		15	[1]				94	[2]
Goodwill impairments		3			0		0
Goodwill written off related to sale of business					103	[3]	0
Goodwill changes in foreign currency exchange rates		0			0		0
Goodwill other							0
Goodwill, balance at the end of the period		528			425		516
Indefinite-lived Intangible Assets [Roll Forward]
Indefinite-Lived Intangible Assets (Excluding Goodwill)		19			19		19		21
Intangible acquisitions		0					1
Tradename, impairments		0			0		0
Intangible written off related to sale of business					0		3
Intangible changes in foreign currency exchange rates		0			0		0
Intangible other							0
China [Member]
Goodwill [Roll Forward]
Goodwill impairments		208
Canada [Member]
Goodwill [Roll Forward]
Goodwill impairments		611
Customer Relationships [Member]
Schedule of Goodwill and Indefinite Lived Intangible Assets by Segment [Line Items]
Finite-Lived Intangible Assets, Gross Carrying Amount		475
Finite-Lived Intangible Assets, Accumulated Amortization		272
Finite-Lived Intangible Assets, Net		203
Scenario, Previously Reported [Member]
Goodwill [Roll Forward]
Goodwill impairments							1,207
Scenario, Previously Reported [Member] | International [Member]
Goodwill [Roll Forward]
Goodwill impairments							$ 1,207

[1] Represents goodwill acquired, primarily as a result of an acquisition made by mindSHIFT in fiscal 2013 (11-month).

[2] (1)Represents goodwill acquired, primarily as a result of the mindSHIFT acquisition in fiscal 2012.

[3] Represents goodwill written-off as a result of the sale of mindSHIFT in fiscal 2014 and indefinite-lived tradenames written off as a result of the sale of Best Buy Europe in fiscal 2014.

[4] Represents the transfer of certain definite-lived tradenames (at their net book value) to indefinite-lived tradenames following our decision to no longer phase out certain tradenames. We believe these tradenames will continue to contribute to our future cash flows indefinitely.

[5] (1)Excludes the gross carrying amount and cumulative impairment related to Best Buy Europe and mindSHIFT, which were sold during fiscal 2014.