Inventory (Tables)

9 Months Ended

Sep. 30, 2011

Inventory [Abstract]

Components of inventories

	As of		As of
	September 30,		December 31,
(In millions)	2011		2010
Raw materials	$	63.6	$	59.0
Work in process		169.0		142.2
Finished goods		78.3		87.9
Total inventory	$	310.9	$	289.1