Inventory (Tables)

6 Months Ended

Jun. 30, 2017

Inventory Disclosure [Abstract]

Components of inventory

The components of inventory are summarized as follows:

(In millions)	As of June 30, 2017		As of December 31, 2016
Raw materials	$	148.3	$	170.4
Work in process	629.3		698.7
Finished goods	184.2		170.3
Total inventory	$	961.8	$	1,039.4
Balance Sheet Classification:
Inventory	$	936.5	$	1,001.6
Investments and other assets	25.3		37.8
Total inventory	$	961.8	$	1,039.4