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Inventories (Tables)
 9 Months Ended
Sep. 27, 2015
Inventory Disclosure [Abstract]  
Inventories
Inventories consist of the following (in millions):
Balance at
September 27, 2015
 
December 28, 2014
Raw materials and supplies
$
150.6

 
$
143.1

Work in process
167.9

 
153.5

Finished goods
42.9

 
43.3

 
361.4

 
339.9

Progress payments
(13.5
)
 
(11.6
)
LIFO reserve
(16.4
)
 
(16.5
)
Total inventories, net
$
331.5

 
$
311.8