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Related Party Transactions (Tables)
9 Months Ended
Sep. 30, 2021
Related Party Transactions [Abstract]  
Schedule of related party transactions
A summary of the aforementioned significant related party transactions is as follows: 
 
Three months ended September 30,
Nine months ended September 30,
 
2021
2020
20212020
Net sales to Glencore$350.6 $235.8 $925.3 $792.4 
Purchases from Glencore78.3 63.7 230.1 137.3 
.