Inventory

3 Months Ended

Mar. 31, 2020

Inventory Disclosure [Abstract]

Inventory

Inventory

The components of inventory are summarized as follows:

(In millions)	As of March 31, 2020		As of December 31, 2019
Raw materials	$	210.9	$	169.7
Work in process	475.2		460.0
Finished goods	172.7		174.5
Total inventory	$	858.8	$	804.2