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Financial Instruments - Schedule of Cash, Cash Equivalents, Short-Term Investments and Restricted Cash and Investments Unrealized Loss Positions (Details) $ in Thousands | Jun. 28, 2020 USD ($)
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Fair Value |
Unrealized Losses Less than 12 Months | $ 534,040
Unrealized Losses 12 Months or Greater | 5,011
Total | 539,051
Gross Unrealized Loss |
Unrealized Losses Less than 12 Months | (605)
Unrealized Losses 12 Months or Greater | (639)
Total | (1,244)
U.S. Treasury and agencies |
Fair Value |
Unrealized Losses Less than 12 Months, available for sale | 189,437
Unrealized Losses 12 Months or Greater, available for sale | 0
Total, available for sale | 189,437
Gross Unrealized Loss |
Unrealized Losses Less than 12 Months, available for sale | (9)
Unrealized Losses 12 Months or Greater, available for sale | 0
Total, available for sale | (9)
Mutual funds |
Fair Value |
Unrealized Losses Less than 12 Months, trading | 2,623
Unrealized Losses 12 Months or Greater, trading | 5,011
Total, trading | 7,634
Gross Unrealized Loss |
Unrealized Losses Less than 12 Months, trading | (289)
Unrealized Losses 12 Months or Greater | (639)
Total, trading | (928)
Foreign government bonds |
Fair Value |
Unrealized Losses Less than 12 Months, available for sale | 9,056
Unrealized Losses 12 Months or Greater, available for sale | 0
Total, available for sale | 9,056
Gross Unrealized Loss |
Unrealized Losses Less than 12 Months, available for sale | (5)
Unrealized Losses 12 Months or Greater, available for sale | 0
Total, available for sale | (5)
Corporate notes and bonds |
Fair Value |
Unrealized Losses Less than 12 Months, available for sale | 332,924
Unrealized Losses 12 Months or Greater, available for sale | 0
Total, available for sale | 332,924
Gross Unrealized Loss |
Unrealized Losses Less than 12 Months, available for sale | (302)
Unrealized Losses 12 Months or Greater, available for sale | 0
Total, available for sale | $ (302)

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