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Inventories (Tables)
9 Months Ended
Sep. 24, 2021
Inventory, Net [Abstract]  
Schedule of Inventories
Inventories were comprised of the following at the end of each period: 
September 24,
2021
December 25,
2020
Raw materials and supplies$54.6 $58.1 
Work in process218.8200.7
Finished goods94.286.1
$367.6 $344.9