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Financial Statement Details - Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Sep. 27, 2020
Jun. 28, 2020
Dec. 27, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Currency translation gain   $ 9.5 $ 9.5
Net unrealized gain on available-for-sale securities   6.5 6.0
Accumulated other comprehensive income, net of taxes   16.0 $ 15.5
Unrealized gain (loss) on available-for-sale securities $ 2.4 $ 2.4