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Inventoried Costs
 3 Months Ended
Mar. 27, 2016
Inventory Disclosure [Abstract]  
Inventoried Costs
Inventoried Costs
 
Inventoried costs consisted of the following components (in millions):
 
 
March 27,
2016
 
December 27,
2015
Raw materials
$
27.2

 
$
32.9

Work in process
23.6

 
19.2

Finished goods
2.4

 
2.6

Supplies and other
1.6

 
1.6

Subtotal inventoried costs
54.8

 
56.3

Less: Customer advances and progress payments
(2.2
)
 
(0.7
)
Total inventoried costs
$
52.6

 
$
55.6