Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	May 03, 2014	May 04, 2013
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Foreign Currency Translation, Beginning Balance	$ 485	$ 113
Available-For-Sale Investments, Beginning Balance	7	(1)
Total, Beginning Balance	492	112
Unrealized gains (losses) on available-for-sale investments	(1)	3
Foreign Currency Translation, Ending Balance	488	80
Available-For-Sale Investments, Ending Balance	6	2
Total, Ending Balance	494	82
Best Buy Co., Inc. [Member]
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Foreign currency translation adjustments	3	(33)
Unrealized gains (losses) on available-for-sale investments	$ (1)	$ 3