Short-Term Investments	6 Months Ended
Short-Term Investments	Jun. 24, 2012
Short-term Investments [Abstract]
Short-Term Investments	SHORT-TERM INVESTMENTS We have short-term investments, with original maturities of longer than 3 months, in U.S. Treasury securities and commercial paper as of June 24, 2012, and in U.S. Treasury securities as of December 25, 2011. Since we have the intention and ability to hold these investments to maturity, they are classified as held-to-maturity and are reported at amortized cost. The carrying value of the short-term investments was $279.9 million as of June 24, 2012, which included approximately $270 million in U.S. Treasury securities and approximately $10 million in commercial paper, and $104.8 million in U.S. Treasury securities as of December 25, 2011. The short-term investments have remaining maturities of about 1 month to 8 months as of June 24, 2012. See Note 9 for information regarding the fair value of our short-term investments.

Tabular disclosure of investments in certain debt and equity securities (and certain other trading assets) which include all debt and equity securities (other than those equity securities accounted for under the equity or cost methods of accounting) with readily determinable fair values. Other trading assets include assets that are carried on the balance sheet at fair value and held for trading purposes. A debt security represents a creditor relationship with an enterprise that is in the form of a security. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities (and other trading assets).

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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