Basis of Presentation	6 Months Ended
Basis of Presentation	Aug. 27, 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, Mexico and Turkey operations on a two-month lag. There were no significant intervening events which would have materially affected our consolidated financial statements had they been recorded during the three months ended August 27, 2011. In February 2011, we announced plans to exit the Turkey market; however, the stores remained open and continued operations until closed in the second quarter of fiscal 2012. In preparing the accompanying condensed consolidated financial statements, we evaluated the period from August 28, 2011, through the date the financial statements were issued for material subsequent events requiring recognition or disclosure. No such events were identified for this period. 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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