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Related party transactions (Tables)

9 Months Ended

Sep. 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 September 30,								Nine months ended September 30,
	2018				2017				2018				2017
Net sales to Glencore	$	305.3			$	299.2			$	884.2			$	876.1
Purchases from Glencore	57.2				81.9				205.6				195.1
Purchases from BHH	5.9				3.2				21.4				9.1

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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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