Discontinued Operations Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	May 02, 2015		May 03, 2014		Feb. 13, 2015
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Revenue	$ 212		$ 396
Restructuring Charges Related to Discontinued Operations	0	[1]	1	[1]
Loss from discontinued operations before income tax benefit	(10)		(10)
Income tax benefit	3		2
Gain on sale of discontinued operations	99		0
Net gain (loss) from discontinued operations, including noncontrolling interests	92		(8)
Net loss from discontinued operations attributable to noncontrolling interests	0		0
Net gain (loss) from discontinued operations attributable to Best Buy Co., Inc. shareholders	92		(8)
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Cash and cash equivalents					125
Receivables					113
Merchandise inventories					252
All other assets					461
Total assets					951
Accounts payable					478
All other liabilities					128
Total liabilities					606
Five Star [Member]
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Gain on sale of discontinued operations	$ 99

[1] See Note 5, Restructuring Charges, for further discussion of the restructuring charges associated with discontinued operations.