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Basis Of Presentation | 12 Months Ended
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Sep. 30, 2011
Basis Of Presentation [Abstract] |
Basis Of Presentation | 1. Basis of Presentation Principles of Consolidation The consolidated financial statements include the accounts of Dolby Laboratories and our wholly-owned subsidiaries. In addition, we have consolidated the financial results of jointly-owned affiliated companies in which our principal stockholder has a controlling interest. We report these controlling interests as a separate line in our consolidated statements of operations as net (income) / loss attributable to controlling interest and in our consolidated balance sheets as controlling interest. We eliminate all intercompany accounts and transactions upon consolidation. Use of Estimates The preparation of the consolidated financial statements in accordance with accounting principles generally accepted in the U.S. ("GAAP") requires management to make certain estimates and assumptions that affect the amounts reported and disclosed in our consolidated financial statements and accompanying notes. Significant items subject to such estimates and assumptions include estimated selling prices for elements sold in multiple-element revenue arrangements, valuation allowances for accounts receivable, carrying values of inventories, products provided under operating leases, goodwill, intangible assets, stock-based compensation, fair values of investments, accrued expenses, including liabilities for unrecognized tax benefits, and deferred income tax assets. Actual results could differ from our estimates. Fiscal Year Our fiscal year is a 52 or 53 week period ending on the last Friday in September. The fiscal years presented herein include 52 week periods ended September 25, 2009 (fiscal 2009), September 24, 2010 (fiscal 2010) and the 53 week period ended September 30, 2011 (fiscal 2011). Reclassifications We have reclassified certain prior period amounts within our consolidated statements of cash flows to conform to our current period presentation. In addition, we have reclassified our U.S. agency securities and U.S. government bonds as Level 1 securities to conform to our current period presentation. In the prior year, U.S. agency securities and U.S. government bonds were classified as Level 2 securities.

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