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 Jan. 28, 2012	$ 4,242	$ 3,621	$ 34	$ 0	$ 3,513	$ 74	$ 621
Beginning balances (in shares) at Jan. 28, 2012			346
Increase (Decrease) in Shareholders' Equity
Adjustment for fiscal year-end change (Note 1) (in shares)			5
Adjustment for fiscal year-end change (Note 1)	(124)	(124)	0	0	(108)	(16)	0
Unrealized gain on available-for-sale investments	0
Ending balances at Mar. 03, 2012	4,366	3,745	34	0	3,621	90	621
Ending balances (in shares) at Mar. 03, 2012			341
Beginning balances at Jan. 28, 2012	4,242	3,621	34	0	3,513	74	621
Beginning balances (in shares) at Jan. 28, 2012			346
Increase (Decrease) in Shareholders' Equity
Net earnings (loss), nine months ended	146	160	0	0	160	0	(14)
Foreign currency translation adjustments		28
Foreign currency translation adjustments	42	28	0	0	0	28	14
Unrealized gain on available-for-sale investments	3	3	0	0	0	3	0
Reclassification of foreign currency translation adjustments into earnings	0
Reclassification of losses on available-for-sale investments into earnings	0
Stock-based compensation	99	99	0	99	0	0	0
Stock options exercised (in shares)			2
Stock options exercised	2	2	0	2	0	0	0
Issuance of common stock under employee stock purchase plan (in shares)			1
Issuance of common stock under employee stock purchase plan	24	24	0	24	0	0	0
Tax deficit from stock options canceled or exercised, restricted stock vesting and employee stock purchase plan	(29)	(29)	0	(29)	0	0	0
Common stock dividends	(164)	(164)	0	0	(164)	0	0
Repurchase and retirement of common stock (in shares)			(11)
Repurchase and retirement of common stock	(237)	(237)	0	(56)	(181)	0	0
Ending balances at Nov. 03, 2012	4,128	3,507	34	40	3,328	105	621
Ending balances (in shares) at Nov. 03, 2012			338
Beginning balances at Aug. 04, 2012
Increase (Decrease) in Shareholders' Equity
Net earnings (loss), nine months ended	1
Foreign currency translation adjustments		18
Foreign currency translation adjustments	33
Unrealized gain on available-for-sale investments	0	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. 03, 2012	4,128	3,507
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)
Foreign currency translation adjustments	(106)
Unrealized gain on available-for-sale investments	1	2	0	0	0	2	(1)
Sale of noncontrolling interest	(776)	0	0	0	0	0	(776)
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
Dividend distribution	(1)	0	0	0	0	0	(1)
Stock-based compensation	74	74	0	74	0	0	0
Stock options exercised (in shares)			7
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 canceled or 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)
Foreign currency translation adjustments	(2)
Unrealized gain 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