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Related Party Transactions (Tables)
12 Months Ended
Dec. 31, 2019
Related Party Transactions [Abstract]  
Schedule of related party transactions
A summary of the aforementioned significant related party transactions for the years ended December 31, 2019, 2018 and 2017 is as follows:
 
Year Ended December 31,
 
2019
 
2018
 
2017
Net sales to Glencore
$
1,191.6

 
$
1,204.5

 
$
1,198.1

Purchases from Glencore
323.9

 
319.6

 
253.0

Purchases from BHH*
17.8

 
28.4

 
15.8


* Represents purchases prior to the sale of our 40% interest in BHH on May 22, 2019.