Inventory (Tables)

9 Months Ended

Sep. 30, 2019

Inventory Disclosure [Abstract]

Components of inventory

The components of inventory are summarized as follows:

(In millions)	As of September 30, 2019		As of December 31, 2018
Raw materials	$	159.3	$	196.3
Work in process	421.7		606.7
Finished goods	170.8		133.5
Total inventory	$	751.8	$	936.5
Balance Sheet Classification:
Inventory	$	751.8	$	929.9
Investments and other assets	—		6.6
Total inventory	$	751.8	$	936.5