Inventory (Tables)

3 Months Ended

Mar. 31, 2017

Inventory Disclosure [Abstract]

Components of inventory

The components of inventory are summarized as follows:

(In millions)	As of March 31, 2017		As of December 31, 2016
Raw materials	$	158.2	$	170.4
Work in process	644.4		698.7
Finished goods	156.8		170.3
Total inventory	$	959.4	$	1,039.4
Balance Sheet Classification:
Inventory	$	921.6	$	1,001.6
Investments and other assets	37.8		37.8
Total inventory	$	959.4	$	1,039.4