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Inventories (Tables)
3 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current
Inventories consist of the following:
March 31,December 31,
(In millions)20212020
Raw materials$576.2 $459.4 
Work-in-process971.2 904.6 
Finished goods117.9 121.7 
Deferred costs499.4 430.9 
$2,164.7 $1,916.6