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Other Current Liabilities - Narrative (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 25, 2020
Sep. 27, 2019
Dec. 27, 2019
Accrued Liabilities, Current [Abstract]      
Customer advances and deferred revenue $ 52.2   $ 33.1
Contract with Customer, Liability, Revenue Recognized $ 25.9 $ 34.9