Financial Instruments (Details 2) $ in Thousands	Sep. 26, 2020 USD ($)
Amortized Cost
Due in one year or less	$ 2,454,654
Due after one year through five years	2,752
Due after five years through ten years	15,182
Due after ten years	98,205
Amortized Cost Total	2,570,793
Estimated Fair Value
Due in one year or less	2,454,704
Due after one year through five years	2,792
Due after five years through ten years	15,872
Due after ten years	99,190
Estimated Fair Value Total	2,572,558
Marketable debt securities with contractual maturities greater than one year but classified as short-term investment	$ 117,900