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Inventories (Tables)
9 Months Ended
Sep. 28, 2019
Inventory Disclosure [Abstract]  
Summary of Inventories A summary of inventories is shown below (in millions):
 
September 28,
2019
 
December 31,
2018
Raw materials
$
946.9

 
$
859.4

Work-in-process
110.5

 
104.6

Finished goods
363.3

 
346.0

Reserves
(126.6
)
 
(113.2
)
Inventories
$
1,294.1

 
$
1,196.8