Inventory

The components of inventory are summarized as follows:



(In millions)	As of June 30, 2018		As of December 31, 2017
Raw materials	$	176.1	$	162.4
Work in process	610.0		605.7
Finished goods	158.5		157.4
Total inventory	$	944.6	$	925.5

Balance Sheet Classification:
Inventory	$	931.7	$	902.7
Investments and other assets	12.9		22.8
Total inventory	$	944.6	$	925.5

Long-term inventory, which primarily consists of work in process, is included in investments and other assets in our condensed consolidated balance sheets.