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Inventories (Tables)
 3 Months Ended
Mar. 29, 2015
Inventory Disclosure [Abstract]  
Inventories
Inventories consist of the following (in millions):
Balance at
March 29, 2015
 
December 28, 2014
Raw materials and supplies
$
143.2

 
$
143.1

Work in process
164.5

 
153.5

Finished goods
42.8

 
43.3

 
350.5

 
339.9

Progress payments
(10.5
)
 
(11.6
)
LIFO reserve
(16.6
)
 
(16.5
)
Total inventories, net
$
323.4

 
$
311.8