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Inventoried Costs (Details) - USD ($)
$ in Millions
Sep. 27, 2020
Dec. 29, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 46.5 $ 39.1
Work in process 27.6 20.3
Finished goods 4.2 1.7
Inventoried costs $ 78.3 $ 61.1