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Short-Term Investments
12 Months Ended
Dec. 25, 2011
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 as of December 25, 2011 and as of December 26, 2010. The carrying value of the short-term investments (which approximated the fair value) was $104.8 million in U.S. Treasury securities as of December 25, 2011 and $30.0 million in U.S. Treasury securities as of December 26, 2010. The short-term investments have remaining maturities of about 1 month to 6 months as of December 25, 2011.