Assets and Liabilities Held for Sale and Discontinued Operations Assets and Liabilities Held for Sale (Details) In Millions, unless otherwise specified	0 Months Ended			3 Months Ended						0 Months Ended
	Jul. 03, 2013 USD ($)	Jun. 26, 2013 USD ($)	Jun. 26, 2013 GBP (£)	May 03, 2014 USD ($)	May 04, 2013 USD ($)	Feb. 01, 2014 USD ($)	Feb. 02, 2013 USD ($)	May 04, 2013 Best Buy Europe [Member] USD ($)	Feb. 28, 2009 Best Buy Europe [Member]	Jun. 26, 2013 June 26, 2014 [Member]	Jun. 26, 2013 June 26, 2015 [Member]
Discontinued Operations and Disposal Groups [Abstract]
Proceeds from Divestiture of Businesses		$ 526	£ 341
Dollar Amount of Shares Received from Divestiture of Business		123	80
Future Cash Consideration from Divestiture of Business, Due within One Year		39	25
Future Cash Consideration from Divestiture of Business, Due within Two Years		39	25
Dollar Amount of Shares Sold from Divestiture of Business	123
Schedule of Assets and Liabilities Disposed of by Sale, in Period of Disposition [Line Items]
Interest Rate on Future Cash Consideration from Divestiture of Business										2.50%	2.50%
Business Acquisition, Percentage of Voting Interests Acquired									50.00%
Impairment of assets held for sale				0	175
Cash and cash equivalents				2,569	908	2,678	1,826	163
Receivables, net				871	937	1,308		1,211
Merchandise inventories				5,255	5,461	5,376		385
Other current assets				926	821	900		120
Current assets held for sale				0	1,879	0
Property and equipment, net				2,525	2,830	2,598		147
Other assets				743	316	404		324
Long-term assets held for sale				13,911	14,331	14,013		471
Accounts payable				4,952	4,776	5,122		965
Other current liabilities								420
Current liabilities held for sale				0	1,385	0
Long-term liabilities held for sale				$ 0	$ 79	$ 0