Inventory (Tables)

6 Months Ended

Jun. 30, 2014

Inventory Disclosure [Abstract]

Components of inventory

The components of inventory are summarized as follows:

(In millions)	As of June 30, 2014		As of December 31, 2013
Raw materials	$	124.8	$	115.0
Work in process	447.4		435.4
Finished goods	143.7		108.6
Total inventory	$	715.9	$	659.0