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Related party transactions (Tables) | 6 Months Ended
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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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- References No definition available. + Details
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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. + References No definition available. + Details
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