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Inventories (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 223.7 $ 92.1
Work in process 717.3 634.5
Finished goods 1,186.7 868.2
Other Inventory, Inventory at off Site Premises, Gross 3.8 23.0
Operating materials and supplies 142.1 121.4
Total Inventory $ 2,273.6 $ 1,739.2