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Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Schedule of inventories
Inventories consist of the following:
June 30, 2020December 31, 2019
Raw materials$71.2  $68.3  
Work in process585.3  618.4  
Finished goods1,157.2  1,219.3  
Final price deferred(a)
29.5  47.9  
Operating materials and supplies110.8  122.5  
$1,954.0  $2,076.4  
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(a)Final price deferred is product that has shipped to customers, but the price has not yet been agreed upon