Basis of Presentation	9 Months Ended
Basis of Presentation	Nov. 26, 2011
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Unless the context otherwise requires, the use of the terms “Best Buy,” “we,” “us” and “our” in these Notes to Condensed Consolidated Financial Statements refers to Best Buy Co., Inc. and its consolidated subsidiaries. In the opinion of management, the accompanying condensed consolidated financial statements contain all adjustments necessary for a fair presentation as prescribed by accounting principles generally accepted in the United States (“GAAP”). All adjustments were comprised of normal recurring adjustments, except as noted in these Notes to Condensed Consolidated Financial Statements. Historically, we have realized more of our revenue and earnings in the fiscal fourth quarter, which includes the majority of the holiday shopping season in the U.S., Europe and Canada, than in any other fiscal quarter. Due to the seasonal nature of our business, interim results are not necessarily indicative of results for the entire fiscal year. The interim financial statements and the related notes in this Quarterly Report on Form 10-Q should be read in conjunction with the consolidated financial statements and related notes included in our Annual Report on Form 10-K for the fiscal year ended February 26, 2011. In order to align our fiscal reporting periods and comply with statutory filing requirements in certain foreign jurisdictions, we consolidate the financial results of our Europe, China and Mexico operations on a two-month lag. Our policy is to accelerate recording the effect of events occurring in the lag period that significantly affect our consolidated financial statements. In November 2011, we announced plans to close our large-format Best Buy branded stores in the United Kingdom ("U.K."). Accordingly, $109 of restructuring charges related to the store closures were included in our third quarter of fiscal 2012 results. Except for these restructuring activities, no significant intervening events occurred which would have materially affected our financial condition, results of operations or liquidity had they been recorded during the three months ended November 26, 2011. We plan to close our large-format Best Buy branded stores in the U.K. during the fourth quarter of fiscal 2012; however, the stores remained open and continued operations throughout the third quarter of fiscal 2012. For further information about our fiscal 2012 restructuring and the nature of the charges we recorded, refer to Note 5, Restructuring Charges. In preparing the accompanying condensed consolidated financial statements, we evaluated the period from November 27, 2011, through the date the financial statements were issued for material subsequent events requiring recognition or disclosure. Other than as described in Note 13, Subsequent Event, no such events were identified for this period. Fiscal Year On November 7, 2011, we announced our intention to change our fiscal year-end from the Saturday nearest the end of February to the Saturday nearest the end of January, effective beginning with our fiscal year 2013. This change will not impact our current fiscal year (fiscal year 2012), which will end on March 3, 2012. However, our fiscal year 2013 will be shortened from 12 months to 11 months and end on February 2, 2013. New Accounting Standards Comprehensive Income — In June 2011, the Financial Accounting Standards Board (“FASB”) issued new guidance on the presentation of comprehensive income. Specifically, the new guidance allows an entity to present components of net income and other comprehensive income in one continuous statement, referred to as the statement of comprehensive income, or in two separate, but consecutive statements. The new guidance eliminates the current option to report other comprehensive income and its components in the statement of changes in equity. While the new guidance changes the presentation of comprehensive income, there are no changes to the components that are recognized in net income or other comprehensive income under current accounting guidance. This new guidance is effective for fiscal years and interim periods beginning after December 15, 2011. We do not believe our adoption of the new guidance in the first quarter of fiscal 2013 will have an impact on our consolidated financial position, results of operations or cash flows. Fair Value Measurement — In April 2011, the FASB issued new guidance to achieve common fair value measurement and disclosure requirements between GAAP and International Financial Reporting Standards. This new guidance amends current fair value measurement and disclosure guidance to include increased transparency around valuation inputs and investment categorization. This new guidance is effective for fiscal years and interim periods beginning after December 15, 2011. We do not believe our adoption of the new guidance in the first quarter of fiscal 2013 will have an impact on our consolidated financial position, results of operations or cash flows.

The entire disclosure for the organization, consolidation and basis of presentation of financial statements disclosure, and significant accounting policies of the reporting entity. May be provided in more than one note to the financial statements, as long as users are provided with an understanding of (1) the significant judgments and assumptions made by an enterprise in determining whether it must consolidate a VIE and/or disclose information about its involvement with a VIE, (2) the nature of restrictions on a consolidated VIE's assets reported by an enterprise in its statement of financial position, including the carrying amounts of such assets, (3) the nature of, and changes in, the risks associated with an enterprise's involvement with the VIE, and (4) how an enterprise's involvement with the VIE affects the enterprise's financial position, financial performance, and cash flows. Describes procedure if disclosures are provided in more than one note to the financial statements.

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