Inventory (Tables)

9 Months Ended

Sep. 30, 2017

Inventory Disclosure [Abstract]

Components of inventory

The components of inventory are summarized as follows:

(In millions)	As of September 30, 2017		As of December 31, 2016
Raw materials	$	208.1	$	170.4
Work in process	647.6		698.7
Finished goods	175.5		170.3
Total inventory	$	1,031.2	$	1,039.4
Balance Sheet Classification:
Inventory	$	1,007.2	$	1,001.6
Investments and other assets	24.0		37.8
Total inventory	$	1,031.2	$	1,039.4