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Cash and Investments - Investments by Security Type (Details) - USD ($) $ in Thousands | Oct. 01, 2021 | Jan. 01, 2021
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Debt securities available-for-sale: |  |
Amortized Cost | $ 1,459,665 | $ 1,349,982
Gross Unrealized Gains | 2,102 | 5,931
Gross Unrealized Losses | (127) | (12)
Fair Value | 1,461,640 | 1,355,901
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents |  |
Amortized Cost | 1,794,137 | 1,532,923
Gross Unrealized Gains | 2,102 | 5,931
Gross Unrealized Losses | (127) | (12)
Fair Value | 1,796,112 | 1,538,842
Commercial paper |  |
Debt securities available-for-sale: |  |
Amortized Cost | 886,323 | 569,456
Gross Unrealized Gains | 73 | 372
Gross Unrealized Losses | 0 | 0
Fair Value | 886,396 | 569,828
Corporate bonds |  |
Debt securities available-for-sale: |  |
Amortized Cost | 503,707 | 543,520
Gross Unrealized Gains | 1,967 | 5,244
Gross Unrealized Losses | (126) | (7)
Fair Value | 505,548 | 548,757
U.S. Treasury and government-sponsored enterprises |  |
Debt securities available-for-sale: |  |
Amortized Cost | 58,965 | 208,326
Gross Unrealized Gains | 21 | 232
Gross Unrealized Losses | (1) | (4)
Fair Value | 58,985 | 208,554
Municipal bonds |  |
Debt securities available-for-sale: |  |
Amortized Cost | 10,670 | 28,680
Gross Unrealized Gains | 41 | 83
Gross Unrealized Losses | 0 | (1)
Fair Value | 10,711 | 28,762
Cash |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents |  |
Amortized Cost | 80,828 | 82,176
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 80,828 | 82,176
Money market funds |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents |  |
Amortized Cost | 119,538 | 40,761
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 119,538 | 40,761
Certificates of deposit |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents |  |
Amortized Cost | 134,106 | 60,004
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | $ 134,106 | $ 60,004

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