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Inventoried Costs
 3 Months Ended
Mar. 26, 2017
Inventory Disclosure [Abstract]  
Inventoried Costs
Inventoried Costs
 
Inventoried costs consisted of the following components (in millions):
 
 
March 26,
2017
 
December 25,
2016
Raw materials
$
32.3

 
$
31.9

Work in process
30.3

 
22.1

Finished goods
1.7

 
1.4

Supplies and other
3.0

 
1.8

Subtotal inventoried costs
67.3

 
57.2

Less: Customer advances and progress payments
(2.5
)
 
(1.8
)
Total inventoried costs
$
64.8

 
$
55.4