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Trade and other receivables | 12 Months Ended
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Dec. 31, 2017
Subclassifications of assets, liabilities and equities [abstract] |
Trade and other receivables | Trade and other receivables:
As at | Dec 31 2017 |  | Dec 31 2016 |
Trade | $ | 429,582 |  | $ | 335,606 |
Value-added and other tax receivables | 36,584 |  | 63,738 |
Egypt gas contract recoveries(a) | 24,466 |  | 41,578 |
Other | 46,004 |  | 58,681 |
| $ | 536,636 |  | $ | 499,603 |
a) Egypt gas contract recoveries: The natural gas supply agreement in Egypt has a mechanism whereby the Company is partially compensated when gas delivery shortfalls exceed a certain threshold. The receivable is secured by a combination of funds held in escrow and a bank guarantee.

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- Definition The disclosure of trade and other receivables. [Refer: Trade and other receivables] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_10_e&doctype=Standard -URIDate 2017-03-09 + Details
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