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
Foreign currency translation adjustments		(15)
Unrealized gain on available-for-sale investments		(1)
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), three months ended	152	158	0	0	158	0	(6)
Foreign currency translation adjustments	43	23	0	0	0	23	20
Unrealized gain on available-for-sale investments	1	1	0	0	0	1	0
Stock-based compensation	33	33	0	33	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	(9)	(9)	0	(9)	0	0	0
Common stock dividends, $0.17 per share during the period ended May 4, 2013 and $0.16 per share during the period ended May 5, 2012, respectively	(53)	(53)	0	0	(53)	0	0
Repurchase of common stock (in shares)			(5)
Repurchase of common stock	(115)	(115)	0	(17)	(98)	0	0
Ending balances at May. 05, 2012	4,307	3,672	34	20	3,520	98	635
Ending balances (in shares) at May. 05, 2012			342
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), three months ended	(73)	(81)	0	0	(81)	0	8
Foreign currency translation adjustments	(63)	(33)	0	0	0	(33)	(30)
Unrealized gain on available-for-sale investments	3	3	0	0	0	3	0
Stock-based compensation	23	23	0	23	0	0	0
Restricted stock vested and stock options exercised (in shares)			1
Restricted stock vested and 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	7	7	0	7	0	0	0
Tax deficit from stock options canceled or exercised, restricted stock vesting and employee stock purchase plan	(9)	(9)	0	(9)	0	0	0
Common stock dividends, $0.17 per share during the period ended May 4, 2013 and $0.16 per share during the period ended May 5, 2012, respectively	(57)	(57)	0	0	(57)	0	0
Ending balances at May. 04, 2013	$ 3,548	$ 2,916	$ 34	$ 77	$ 2,723	$ 82	$ 632
Ending balances (in shares) at May. 04, 2013			340