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Cash and Investments (Summary by Contractual Maturity) (Details) - USD ($) $ in Thousands	Dec. 28, 2018	Dec. 29, 2017
Investments, Debt and Equity Securities [Abstract]
Maturing in one year or less	$ 674,455	$ 377,155
Maturing after one year through five years	153,687	63,255
Total investments available-for-sale	$ 828,142	$ 440,410

X

- Definition

Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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