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Investments and Fair Value Measurements-Cash and Mkt Securities (Details 1) (USD $)
In Thousands, unless otherwise specified
Jun. 29, 2014
Dec. 29, 2013
Jun. 30, 2013
Dec. 30, 2012
Cash, Cash Equivalents and Marketable Securities [Abstract]        
Cash and Cash Equivalents $ 885,115 $ 986,246 $ 1,054,131 $ 995,470
Short-term marketable securities 1,794,356 1,919,611    
Long-term marketable securities 3,569,453 3,179,471    
Total cash, cash equivalents and marketable securities $ 6,248,924 $ 6,085,328