CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (USD $) In Millions, unless otherwise specified	Total	Total Best Buy Co., Inc. [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests [Member]
Beginning balances at Feb. 02, 2013	$ 3,715	$ 3,061	$ 34	$ 54	$ 2,861	$ 112	$ 654
Beginning balances (in shares) at Feb. 02, 2013			338
Increase (Decrease) in Shareholders' Equity
Net earnings (loss), nine months ended	229	239	0	0	239	0	(10)
Foreign currency translation adjustments	(106)	(95)	0	0	0	(95)	(11)
Unrealized gains (losses) on available-for-sale investments	1	2	0	0	0	2	(1)
Sale of noncontrolling interest	(776)	0	0	0	0	0	(776)
Dividend distribution	(1)		0	0	0	0	(1)
Reclassification of foreign currency translation adjustments into earnings	654	508	0	0	0	508	146
Reclassification of losses on available-for-sale investments into earnings	2	1	0	0	0	1	1
Stock-based compensation	74	74	0	74	0	0	0
Restricted stock vested and stock options exercised (in shares)			7
Restricted stock vested and stock options exercised	136	136	1	135	0	0	0
Issuance of common stock under employee stock purchase plan (in shares)			1
Issuance of common stock under employee stock purchase plan	13	13	0	13	0	0	0
Tax deficit from stock options exercised, restricted stock vesting and employee stock purchase plan	(23)	(23)	0	(23)	0	0	0
Common stock dividends	(174)	(174)	0	0	(174)	0	0
Ending balances at Nov. 02, 2013	3,744	3,742	35	253	2,926	528	2
Ending balances (in shares) at Nov. 02, 2013			346
Beginning balances at Aug. 03, 2013
Increase (Decrease) in Shareholders' Equity
Net earnings (loss), nine months ended	54
Foreign currency translation adjustments	(2)
Unrealized gains (losses) on available-for-sale investments	1	1
Reclassification of foreign currency translation adjustments into earnings	0
Reclassification of losses on available-for-sale investments into earnings	0
Ending balances at Nov. 02, 2013	3,744	3,742
Beginning balances at Feb. 01, 2014	3,989	3,986	35	300	3,159	492	3
Beginning balances (in shares) at Feb. 01, 2014			347
Increase (Decrease) in Shareholders' Equity
Net earnings (loss), nine months ended	715	714	0	0	714	0	1
Foreign currency translation adjustments	(22)	(22)	0	0	0	(22)	0
Unrealized gains (losses) on available-for-sale investments	(2)	(2)	0	0	0	(2)	0
Reclassification of foreign currency translation adjustments into earnings	0
Reclassification of losses on available-for-sale investments into earnings	0
Stock-based compensation	64	64	0	64
Restricted stock vested and stock options exercised (in shares)			3
Restricted stock vested and stock options exercised	19	19	0	19	0	0	0
Issuance of common stock under employee stock purchase plan (in shares)			0
Issuance of common stock under employee stock purchase plan	8	8	0	8	0	0	0
Tax deficit from stock options exercised, restricted stock vesting and employee stock purchase plan	(14)	(14)	0	(14)	0	0	0
Common stock dividends	(184)	(184)	0	0	(184)	0	0
Ending balances at Nov. 01, 2014	4,573	4,569	35	377	3,689	468	4
Ending balances (in shares) at Nov. 01, 2014			350
Beginning balances at Aug. 02, 2014
Increase (Decrease) in Shareholders' Equity
Net earnings (loss), nine months ended	107
Foreign currency translation adjustments	(25)
Unrealized gains (losses) on available-for-sale investments	(1)	(1)
Reclassification of foreign currency translation adjustments into earnings	0
Reclassification of losses on available-for-sale investments into earnings	0
Ending balances at Nov. 01, 2014	$ 4,573	$ 4,569