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Inventoried Costs
 6 Months Ended
Jun. 26, 2016
Inventory Disclosure [Abstract]  
Inventoried Costs
Inventoried Costs
 
Inventoried costs consisted of the following components (in millions):
 
 
June 26,
2016
 
December 27,
2015
Raw materials
$
29.9

 
$
32.9

Work in process
23.8

 
19.2

Finished goods
1.2

 
2.6

Supplies and other
1.6

 
1.6

Subtotal inventoried costs
56.5

 
56.3

Less: Customer advances and progress payments
(6.6
)
 
(0.7
)
Total inventoried costs
$
49.9

 
$
55.6