Assets and Liabilities Held for Sale and Discontinued Operations Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	May 03, 2014	May 04, 2013
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax		$ 28
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue		1,463
Restructuring charges		53	[1]
Loss from discontinued operations before income tax expense		(185)
Income tax benefit (expense)	0	(13)	[2]
Gain on sale of discontinued operations		28
Net gain (loss) from discontinued operations, including noncontrolling interests	0	(170)
Net earnings from discontinued operations attributable to noncontrolling interests	0	(8)
Net gain (loss) from discontinued operations attributable to Best Buy Co., Inc. shareholders		$ (178)

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

[2] The fiscal 2014 effective tax rate for discontinued operations differs from the statutory tax rate primarily due to the $53 million of restructuring charges and $175 million impairment of our investment in Best Buy Europe, which generally included no related tax benefit. The deferred tax assets related to the restructuring charges generally resulted in an increase in the valuation allowance in an equal amount, while the investment impairment is not tax deductible.