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Investments and Fair Value Measurements-Debt Instrument FV (Details 8) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 30, 2012
Related costs and the fair values based on quoted market prices    
Convertible debt, carrying value $ 809,626 $ 1,696,621
Convertible Debt [Member]
   
Related costs and the fair values based on quoted market prices    
Convertible debt, carrying value 809,626 1,696,621
Convertible debt, fair value 1,345,260 2,087,190
1% Sr. Convertible Notes due 2013 [Member]
   
Related costs and the fair values based on quoted market prices    
Convertible debt, carrying value 0 906,708
Convertible debt, fair value 0 927,820
1.5% Sr. Convertible Notes due 2017 [Member]
   
Related costs and the fair values based on quoted market prices    
Convertible debt, carrying value 809,626 789,913
Convertible debt, fair value $ 1,345,260 $ 1,159,370