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. 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), three months ended	461	461	0	0	461	0	0
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 due to sale of business	0
Stock-based compensation	23	23	0	23	0	0	0
Restricted stock vested and stock options exercised (in shares)			2
Restricted stock vested and stock options exercised	5	5	0	5	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 benefit (deficit) from stock options exercised, restricted stock vesting and employee stock purchase plan	(2)	(2)	0	(2)	0	0	0
Common stock dividends	(58)	(58)	0	0	(58)	0	0
Ending balances at May. 03, 2014	4,424	4,421	35	330	3,562	494	3
Ending balances (in shares) at May. 03, 2014			349
Beginning balances at Jan. 31, 2015	5,000	4,995	35	437	4,141	382	5
Beginning balances (in shares) at Jan. 31, 2015			352
Increase (Decrease) in Shareholders' Equity
Net earnings (loss), three months ended	129	129	0	0	129	0	0
Foreign currency translation adjustments	15	15	0	0	0	15	0
Unrealized gains (losses) on available-for-sale investments	0
Reclassification of foreign currency translation adjustments into earnings due to sale of business	(67)	(67)	0	0	0	(67)	0
Sale of noncontrolling interest	5	0	0	0	0	0	(5)
Stock-based compensation	27	27	0	27
Restricted stock vested and stock options exercised (in shares)			1
Restricted stock vested and stock options exercised	22	22	0	22	0	0	0
Issuance of common stock under employee stock purchase plan (in shares)			0
Issuance of common stock under employee stock purchase plan	3	3	0	3	0	0	0
Tax benefit (deficit) from stock options exercised, restricted stock vesting and employee stock purchase plan	5	5	0	5	0	0	0
Common stock dividends	(261)	(261)	0	0	(261)	0	0
Ending balances at May. 02, 2015	$ 4,868	$ 4,868	$ 35	$ 494	$ 4,009	$ 330	$ 0
Ending balances (in shares) at May. 02, 2015			353