Financial Instruments (Details 3) $ in Thousands	Jun. 26, 2015 USD ($)
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	$ 228,777
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	228,858
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	2,046,919
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	2,043,059
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	404,854
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	405,883
Available-for-sale Securities, Debt Maturities, Without Single Maturity Date, Amortized Cost Basis	2,680,550
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	$ 2,677,800