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), six months ended	175	185	0	0	185	0	(10)
Foreign currency translation adjustments	(104)	(93)	0	0	0	(93)	(11)
Unrealized gains (losses) on available-for-sale investments	0	1	0	0	0	1	(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
Stock-based compensation	48	48	0	48	0	0	0
Restricted stock vested and stock options exercised (in shares)			2
Restricted stock vested and stock options exercised	14	14	0	14	0	0	0
Issuance of common stock under employee stock purchase plan (in shares)			1
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	(15)	(15)	0	(15)	0	0	0
Common stock dividends	(116)	(116)	0	0	(116)	0	0
Ending balances at Aug. 03, 2013	3,605	3,602	34	109	2,930	529	3
Ending balances (in shares) at Aug. 03, 2013			341
Beginning balances at May. 04, 2013
Increase (Decrease) in Shareholders' Equity
Net earnings (loss), six months ended	248
Foreign currency translation adjustments	(41)
Unrealized gains (losses) on available-for-sale investments	(3)	(2)
Reclassification of foreign currency translation adjustments into earnings	654	508
Reclassification of losses on available-for-sale investments into earnings	2	1
Ending balances at Aug. 03, 2013	3,605	3,602
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), six months ended	608	607	0	0	607	0	1
Foreign currency translation adjustments	3	3	0	0	0	3	0
Unrealized gains (losses) on available-for-sale investments	(1)	(1)	0	0	0	(1)	0
Reclassification of foreign currency translation adjustments into earnings	0
Reclassification of losses on available-for-sale investments into earnings	0
Stock-based compensation	41	41	0	41
Restricted stock vested and stock options exercised (in shares)			2
Restricted stock vested and stock options exercised	13	13	0	13	0	0	0
Issuance of common stock under employee stock purchase plan (in shares)			0
Issuance of common stock under employee stock purchase plan	4	4	0	4	0	0	0
Tax deficit from stock options exercised, restricted stock vesting and employee stock purchase plan	(10)	(10)	0	(10)	0	0	0
Common stock dividends	(117)	(117)	0	0	(117)	0	0
Ending balances at Aug. 02, 2014	$ 4,530	$ 4,526	$ 35	$ 348	$ 3,649	$ 494	$ 4
Ending balances (in shares) at Aug. 02, 2014			349