Financial Instruments (Details 2) $ in Thousands	Oct. 01, 2016 USD ($)
Amortized cost and estimated fair value of marketable debt securities
Amortized Cost Due in one year or less	$ 1,087,110
Amortized Cost Due after one year through five years	505,011
Amortized Cost Due after five years through ten years	216,148
Amortized Cost Due after ten years	1,366,621
Amortized Cost Total	3,174,890
Estimated Fair Value Due in one year or less	1,087,208
Estimated Fair Value Due after one year through five years	505,844
Estimated Fair Value Due after five years through ten years	217,553
Estimated Fair Value Due after ten years	1,374,640
Estimated Fair Value Total	3,185,245
Marketable debt securities with contractual maturities greater than one year but classified as short-term investment	$ 1,990,000