Debt (Details) (USD $) In Millions, unless otherwise specified	Aug. 03, 2013	Feb. 02, 2013		Aug. 04, 2012
Short-term Debt
Short-term debt	$ 0	$ 596		$ 519
New Us Revolving Credit Facility, 364 Day [Member] [Domain]
Short-term Debt
Line of Credit Facility, Current Borrowing Capacity	500
Short-term debt	0
Debt Instrument, Basis Spread on Federal Funds Rate	0.50%
Debt Instrument, Basis Spread on Libor	1.00%
Debt Instrument, Lower Range on Annual Base Rate	0.00%
Debt Instrument, Higher Range on Annual Base Rate	0.60%
Debt Instrument, Description of Variable Rate Basis	0.925%
Debt Instrument, Basis Spread on Variable Rate, High End of Range	1.60%
Debt Instrument, Lower Range on Facility Fee	0.075%
Debt Instrument, Higher Range on Facility Fee	0.275%
U.S. revolving credit facility - 364-Day [Member]
Short-term Debt
Line of Credit Facility, Current Borrowing Capacity	1,000
Short-term debt		0		0
U.S. revolving credit facility - Five-Year [Member]
Short-term Debt
Short-term debt	0	0		0
Europe revolving credit facility [Member]
Short-term Debt
Short-term debt	0	596	[1]	519	[1]
Canada revolving demand facility [Member]
Short-term Debt
Short-term debt	0	0		0
China revolving demand facilities [Member]
Short-term Debt
Short-term debt	$ 0	$ 0		$ 0

[1] (1) Short-term debt associated with the Europe revolving credit facility is related to our Best Buy Europe operations, which we sold on June 26, 2013, as described in Note 2, Discontinued Operations.