Financial Instruments (Details 2) $ in Thousands	Sep. 29, 2018 USD ($)
Amortized Cost
Due in one year or less	$ 1,825,385
Due after one year through five years	162,134
Due after five years through ten years	139,922
Due after ten years	740,779
Amortized Cost Total	2,868,220
Estimated Fair Value
Due in one year or less	1,825,113
Due after one year through five years	158,928
Due after five years through ten years	135,283
Due after ten years	716,104
Estimated Fair Value Total	2,835,428
Marketable debt securities with contractual maturities greater than one year but classified as short-term investment	$ 1,010,000