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Inventories (Tables)
 12 Months Ended
Dec. 28, 2014
Inventory Disclosure [Abstract]  
Inventories
Inventories consist of the following (in millions):
 
 
Balance at year-end
 
 
2014
 
2013
Raw materials and supplies
 
$
143.1

 
$
130.7

Work in process
 
153.5

 
151.5

Finished goods
 
43.3

 
41.4

 
 
339.9

 
323.6

Progress payments
 
(11.6
)
 
(12.7
)
LIFO reserve
 
(16.5
)
 
(16.6
)
Total inventories, net
 
$
311.8

 
$
294.3