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Inventories (Tables)
 12 Months Ended
Dec. 30, 2012
Inventory Disclosure [Abstract]  
Inventories
Inventories consist of the following (in millions):
 
 
Balance at year-end

 
2012
 
2011
Raw materials and supplies
 
$
129.4

 
$
107.3

Work in process
 
145.9

 
104.9

Finished goods
 
30.5

 
28.0

 
 
305.8

 
240.2

Progress payments
 
(7.3
)
 
(3.4
)
LIFO reserve
 
(17.3
)
 
(17.4
)
Total inventories, net
 
$
281.2

 
$
219.4