CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (USD $) In Millions, except Share data, unless otherwise specified	Total	Total Best Buy Co., Inc. Shareholder's Equity	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest [Member]
Beginning balances at Feb. 28, 2009	$ 5,156	$ 4,643	$ 41	$ 205	$ 4,714	$ (317)	$ 513
Beginning balances (in shares) at Feb. 28, 2009			414,000,000
Increase (Decrease) in Shareholders' Equity
Net earnings (loss)	1,394	1,317	0	0	1,317	0	77
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments	405	329	0	0	0	329	76
Unrealized gains (losses) on available-for-sale securities	28	28	0	0	0	28	0
Total comprehensive income (loss)	1,827	1,674					153
Payment to noncontrolling interest	0
Purchase accounting adjustments	(22)	0	0	0	0	0	(22)
Stock options exercised	96	96	1	95	0	0	0
Stock options exercised (in shares)			4,000,000
Tax benefits (loss) from stock options, restricted stock and employee stock purchase plan	(19)	(19)	0	(19)	0	0	0
Issuance of common stock under employee stock purchase plan	42	42	0	42	0	0	0
Issuance of common stock under employee stock purchase plan (in shares)			1,000,000
Stock-based compensation	118	118	0	118	0	0	0
Common stock dividends, $0.62 per share during the period ended March 3, 2012, $0.58 per share during the period ended February 26, 2011, and $0.56 per share during the period ended February 27, 2010, respectively	(234)	(234)	0	0	(234)	0	0
Ending balances at Feb. 27, 2010	6,964	6,320	42	441	5,797	40	644
Ending balances (in shares) at Feb. 27, 2010			419,000,000
Increase (Decrease) in Shareholders' Equity
Net earnings (loss)	1,366	1,277	0	0	1,277	0	89
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments	34	76	0	0	0	76	(42)
Unrealized gains (losses) on available-for-sale securities	58	58	0	0	0	58	0
Cash flow hedging instruments - unrealized gains (losses)	(2)	(1)	0	0	0	(1)	(1)
Total comprehensive income (loss)	1,456	1,410					46
Payment to noncontrolling interest	0
Stock options exercised	134	134	0	134	0	0	0
Stock options exercised (in shares)			4,000,000
Vesting of restricted stock (in shares)			1,000,000
Vesting of restricted stock	0	0	0	0	0	0	0
Tax benefits (loss) from stock options, restricted stock and employee stock purchase plan	3	3	0	3	0	0	0
Issuance of common stock under employee stock purchase plan	45	45	0	45	0	0	0
Issuance of common stock under employee stock purchase plan (in shares)			1,000,000
Stock-based compensation	121	121	0	121	0	0	0
Common stock dividends, $0.62 per share during the period ended March 3, 2012, $0.58 per share during the period ended February 26, 2011, and $0.56 per share during the period ended February 27, 2010, respectively	(238)	(238)	0	0	(238)	0	0
Repurchase of common stock	(1,193)	(1,193)	(3)	(726)	(464)	0	0
Repurchase of common stock (in shares)			(32,000,000)
Ending balances at Feb. 26, 2011	7,292	6,602	39	18	6,372	173	690
Ending balances (in shares) at Feb. 26, 2011			393,000,000
Increase (Decrease) in Shareholders' Equity
Net earnings (loss)	22	(1,231)	0	0	(1,231)	0	1,253
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments	(21)	(9)	0	0	0	(9)	(12)
Unrealized gains (losses) on available-for-sale securities	(26)	(26)	0	0	0	(26)	0
Reclassification adjustment for gain on availbable-for-sale securities included in net earnings	(48)	(48)	0	0	0	(48)	0
Total comprehensive income (loss)	(73)	(1,314)					1,241
Payment to noncontrolling interest	(1,303)	0	0	0	0	0	(1,303)
Dividend distribution	(7)	0	0	0	0	0	(7)
Stock options exercised	27	27	0	27	0	0	0
Stock options exercised (in shares)	1,126,000		1,000,000
Tax benefits (loss) from stock options, restricted stock and employee stock purchase plan	(2)	(2)	0	(2)	0	0	0
Issuance of common stock under employee stock purchase plan	40	40	0	40	0	0	0
Issuance of common stock under employee stock purchase plan (in shares)			2,000,000
Stock-based compensation	120	120	0	120	0	0	0
Common stock dividends, $0.62 per share during the period ended March 3, 2012, $0.58 per share during the period ended February 26, 2011, and $0.56 per share during the period ended February 27, 2010, respectively	(228)	(228)	0	0	(228)	0	0
Repurchase of common stock	(1,500)	(1,500)	(5)	(203)	(1,292)	0	0
Repurchase of common stock (in shares)			(55,000,000)
Ending balances at Mar. 03, 2012	$ 4,366	$ 3,745	$ 34	$ 0	$ 3,621	$ 90	$ 621
Ending balances (in shares) at Mar. 03, 2012			341,000,000