CONSOLIDATED STATEMENTS OF EARNINGS (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
May 02, 2015	May 03, 2014
Revenue	$ 8,558us-gaap_SalesRevenueNet	$ 8,639us-gaap_SalesRevenueNet
Cost of goods sold	6,520us-gaap_CostOfGoodsSold	6,672us-gaap_CostOfGoodsSold
Restructuring charges – cost of goods sold	8bby_CostOfGoodsSoldRestructuring	0bby_CostOfGoodsSoldRestructuring
Gross profit	2,030us-gaap_GrossProfit	1,967us-gaap_GrossProfit
Selling, general and administrative expenses	1,766	1,755
Restructuring charges	178	2
Operating income	86us-gaap_OperatingIncomeLoss	210us-gaap_OperatingIncomeLoss
Other income (expense)
Gain on sale of investments	2	0
Investment income and other	7us-gaap_InvestmentIncomeNet	4us-gaap_InvestmentIncomeNet
Interest expense	(20)us-gaap_InterestExpense	(23)us-gaap_InterestExpense
Earnings from continuing operations before income tax (benefit) expense	75	191
Income tax (benefit) expense	38us-gaap_IncomeTaxExpenseBenefit	(278)us-gaap_IncomeTaxExpenseBenefit
Net earnings from continuing operations	37	469
Gain (loss) from discontinued operations (Note 2), net of tax benefit of $3 and $2	92	(8)
Net earnings including noncontrolling interests	129us-gaap_ProfitLoss	461us-gaap_ProfitLoss
Net loss from discontinued operations attributable to noncontrolling interests	0	0
Net earnings attributable to Best Buy Co., Inc. shareholders	$ 129us-gaap_NetIncomeLoss	$ 461us-gaap_NetIncomeLoss
Basic earnings (loss) per share attributable to Best Buy Co., Inc. shareholders
Continuing operations (in dollars per share)	$ 0.11	$ 1.35
Discontinued operations (in dollars per share)	$ 0.26	$ (0.02)
Basic earnings per share (in dollars per share)	$ 0.37us-gaap_EarningsPerShareBasic	$ 1.33us-gaap_EarningsPerShareBasic
Diluted earnings (loss) per share attributable to Best Buy Co., Inc. shareholders
Continuing operations (in dollars per share)	$ 0.10	$ 1.33
Discontinued operations (in dollars per share)	$ 0.26	$ (0.02)
Diluted earnings per share (in dollars per share)	$ 0.36us-gaap_EarningsPerShareDiluted	$ 1.31us-gaap_EarningsPerShareDiluted
Dividends declared per common share (in dollars per share)	$ 0.74	$ 0.17
Weighted-average common shares outstanding (in millions)
Basic (in shares)	352.4	347.4
Diluted (in shares)	357.6	350.4

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