Financial Instruments (Details 2) $ in Thousands	Mar. 28, 2020 USD ($)
Investments, All Other Investments [Abstract]
Marketable debt securities with contractual maturities greater than one year but classified as short-term investment	$ 209,500
Amortized cost and estimated fair value of marketable debt securities
Amortized Cost Due in one year or less	1,274,196
Amortized Cost Due after one year through five years	7,628
Amortized Cost Due after five years through ten years	31,432
Amortized Cost Due after ten years	168,875
Amortized Cost Total	1,482,131
Estimated Fair Value Due in one year or less	1,274,283
Estimated Fair Value Due after one year through five years	7,670
Estimated Fair Value Due after five years through ten years	32,369
Estimated Fair Value Due after ten years	169,456
Estimated Fair Value Total	$ 1,483,778