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Inventories
12 Months Ended
Dec. 27, 2019
Inventory, Net [Abstract]  
Inventories
10.
Inventories
Inventories were comprised of the following at the end of each period: 
 
December 27,
2019
 
December 28,
2018
Raw materials
$
62.7

 
$
69.2

Work in process
166.5

 
167.6

Finished goods
82.9

 
85.5

Inventories
$
312.1

 
$
322.3