Financial Instruments - Schedule of Cash, Cash Equivalents, Short-Term Investments and Restricted Cash and Investments Unrealized Loss Positions (Details) $ in Thousands	Jun. 27, 2021 USD ($)
Fair Value
Unrealized Losses Less than 12 Months	$ 420,775
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(600)
U.S. Treasury and agencies
Fair Value
Unrealized Losses Less than 12 Months, available for sale	122,791
Gross Unrealized Loss
Unrealized Losses Less than 12 Months, available for sale	(47)
Mutual funds
Fair Value
Unrealized Losses Less than 12 Months, trading	2,642
Gross Unrealized Loss
Unrealized Losses Less than 12 Months, trading	(33)
Foreign government bonds
Fair Value
Unrealized Losses Less than 12 Months, available for sale	2,133
Gross Unrealized Loss
Unrealized Losses Less than 12 Months, available for sale	(4)
Corporate notes and bonds
Fair Value
Unrealized Losses Less than 12 Months, available for sale	278,133
Gross Unrealized Loss
Unrealized Losses Less than 12 Months, available for sale	(457)
Mortgage backed securities - commercial
Fair Value
Unrealized Losses Less than 12 Months, available for sale	15,076
Gross Unrealized Loss
Unrealized Losses Less than 12 Months, available for sale	$ (59)