Inventory (Tables)

12 Months Ended

Dec. 31, 2019

Inventory Disclosure [Abstract]

Components of inventory

The components of inventory are summarized as follows:

	As of December 31,
(In millions)	2019		2018
Raw materials	$	169.7	$	196.3
Work in process	460.0		606.7
Finished goods	174.5		133.5
Total inventory	$	804.2	$	936.5
Balance Sheet Classification:
Inventory	$	804.2	$	929.9
Investments and other assets	—		6.6
Total inventory	$	804.2	$	936.5