Related Party Transactions (Tables)

3 Months Ended

Mar. 31, 2019

Related Party Transactions [Abstract]

Schedule of related party transactions

A summary of the aforementioned significant related party transactions is as follows: 

	Three months ended March 31,
	2019		2018
Net sales to Glencore	$	311.3	$	296.2
Purchases from Glencore	90.7		48.4
Purchases from BHH	6.1		7.4