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Related party transactions (Tables)

6 Months Ended

Jun. 30, 2018

Related Party Transactions [Abstract]

Schedule of related party transactions

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

	Three months ended June 30,								Six months ended June 30,
	2018				2017				2018				2017
Net sales to Glencore	$	282.7			$	296.3			$	579.0			$	576.8
Purchases from Glencore	100.0				41.6				148.5				113.2
Purchases from BHH	8.1				3.1				15.5				5.9

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- Definition

Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates.

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