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Inventories
3 Months Ended
Mar. 30, 2019
Inventory Disclosure [Abstract]  
Inventories Inventories Inventories are stated at the lower of cost or net realizable value. Cost is determined using the first-in, first-out method. Finished goods and work-in-process inventories include material, labor and manufacturing overhead costs. A summary of inventories is shown below (in millions):
 
March 30,
2019
 
December 31, 2018
Raw materials
$
881.4

 
$
859.4

Work-in-process
105.0

 
104.6

Finished goods
331.1

 
346.0

Reserves
(117.0
)
 
(113.2
)
Inventories
$
1,200.5

 
$
1,196.8